/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/mono-crafted_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:15:49,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:15:49,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:15:49,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:15:49,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:15:49,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:15:49,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:15:49,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:15:49,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:15:49,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:15:49,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:15:49,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:15:49,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:15:49,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:15:49,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:15:49,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:15:49,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:15:49,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:15:49,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:15:49,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:15:49,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:15:49,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:15:49,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:15:49,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:15:49,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:15:49,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:15:49,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:15:49,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:15:49,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:15:49,112 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:15:49,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:15:49,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:15:49,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:15:49,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:15:49,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:15:49,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:15:49,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:15:49,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:15:49,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:15:49,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:15:49,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:15:49,119 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 16:15:49,140 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:15:49,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:15:49,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:15:49,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:15:49,142 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:15:49,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:15:49,143 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:15:49,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:15:49,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:15:49,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:15:49,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:15:49,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:15:49,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:15:49,144 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:15:49,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:15:49,145 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:15:49,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:15:49,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:15:49,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:15:49,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:15:49,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:15:49,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:15:49,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:15:49,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:15:49,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:15:49,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:15:49,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:15:49,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:15:49,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:15:49,147 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 16:15:49,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:15:49,476 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:15:49,479 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:15:49,481 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:15:49,481 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:15:49,482 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2020-10-12 16:15:49,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f5bcd3e2/e942e5a1dffd4f2abd84bfb0afd93f50/FLAG624696004 [2020-10-12 16:15:50,001 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:15:50,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2020-10-12 16:15:50,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f5bcd3e2/e942e5a1dffd4f2abd84bfb0afd93f50/FLAG624696004 [2020-10-12 16:15:50,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f5bcd3e2/e942e5a1dffd4f2abd84bfb0afd93f50 [2020-10-12 16:15:50,407 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:15:50,409 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:15:50,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:15:50,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:15:50,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:15:50,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:15:50" (1/1) ... [2020-10-12 16:15:50,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44fd9ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:15:50, skipping insertion in model container [2020-10-12 16:15:50,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:15:50" (1/1) ... [2020-10-12 16:15:50,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:15:50,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:15:50,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:15:50,634 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:15:50,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:15:50,665 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:15:50,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:15:50 WrapperNode [2020-10-12 16:15:50,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:15:50,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:15:50,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:15:50,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:15:50,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:15:50" (1/1) ... [2020-10-12 16:15:50,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:15:50" (1/1) ... [2020-10-12 16:15:50,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:15:50" (1/1) ... [2020-10-12 16:15:50,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:15:50" (1/1) ... [2020-10-12 16:15:50,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:15:50" (1/1) ... [2020-10-12 16:15:50,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:15:50" (1/1) ... [2020-10-12 16:15:50,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:15:50" (1/1) ... [2020-10-12 16:15:50,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:15:50,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:15:50,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:15:50,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:15:50,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:15:50" (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 16:15:50,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:15:50,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:15:50,847 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:15:50,847 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:15:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:15:50,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:15:50,848 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:15:50,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:15:50,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:15:51,037 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:15:51,038 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 16:15:51,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:15:51 BoogieIcfgContainer [2020-10-12 16:15:51,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:15:51,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:15:51,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:15:51,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:15:51,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:15:50" (1/3) ... [2020-10-12 16:15:51,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b67e82a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:15:51, skipping insertion in model container [2020-10-12 16:15:51,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:15:50" (2/3) ... [2020-10-12 16:15:51,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b67e82a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:15:51, skipping insertion in model container [2020-10-12 16:15:51,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:15:51" (3/3) ... [2020-10-12 16:15:51,050 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2020-10-12 16:15:51,062 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:15:51,069 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:15:51,085 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:15:51,128 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:15:51,128 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:15:51,128 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:15:51,128 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:15:51,129 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:15:51,129 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:15:51,129 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:15:51,129 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:15:51,157 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-12 16:15:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-12 16:15:51,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:51,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:51,165 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:51,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1762590288, now seen corresponding path program 1 times [2020-10-12 16:15:51,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:51,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095057182] [2020-10-12 16:15:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:51,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:51,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:51,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:51,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:51,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 16:15:51,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:51,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-12 16:15:51,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:15:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:15:51,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:15:51,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:51,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:51,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:51,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:51,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:51,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:15:51,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:51,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:51,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:51,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:51,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:51,559 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 16:15:51,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095057182] [2020-10-12 16:15:51,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:15:51,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:15:51,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656284617] [2020-10-12 16:15:51,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:15:51,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:51,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:15:51,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:15:51,582 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-10-12 16:15:51,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:51,761 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2020-10-12 16:15:51,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:15:51,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-12 16:15:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:51,785 INFO L225 Difference]: With dead ends: 44 [2020-10-12 16:15:51,785 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 16:15:51,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:15:51,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 16:15:51,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-12 16:15:51,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-12 16:15:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-10-12 16:15:51,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2020-10-12 16:15:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:51,841 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-10-12 16:15:51,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:15:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-10-12 16:15:51,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-12 16:15:51,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:51,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:51,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:15:51,845 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:51,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:51,847 INFO L82 PathProgramCache]: Analyzing trace with hash 830194858, now seen corresponding path program 1 times [2020-10-12 16:15:51,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:51,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059080257] [2020-10-12 16:15:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:51,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:51,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:51,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:51,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:15:51,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:51,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-12 16:15:51,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:51,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:15:51,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:51,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 16:15:51,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:52,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:52,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:52,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:52,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:52,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:52,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:15:52,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:52,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:52,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:52,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:52,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:52,021 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 16:15:52,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059080257] [2020-10-12 16:15:52,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:52,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:15:52,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19192874] [2020-10-12 16:15:52,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:15:52,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:52,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:15:52,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:15:52,026 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 4 states. [2020-10-12 16:15:52,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:52,043 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-10-12 16:15:52,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:15:52,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-12 16:15:52,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:52,045 INFO L225 Difference]: With dead ends: 22 [2020-10-12 16:15:52,045 INFO L226 Difference]: Without dead ends: 17 [2020-10-12 16:15:52,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:15:52,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-12 16:15:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2020-10-12 16:15:52,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-12 16:15:52,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-12 16:15:52,053 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-10-12 16:15:52,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:52,053 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-12 16:15:52,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:15:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-12 16:15:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 16:15:52,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:52,054 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:52,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:15:52,055 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:52,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:52,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1774582, now seen corresponding path program 2 times [2020-10-12 16:15:52,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:52,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898505857] [2020-10-12 16:15:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:52,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:52,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:52,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:52,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:15:52,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:52,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-12 16:15:52,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:52,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:15:52,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:52,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:15:52,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:52,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:52,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:52,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:52,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:52,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:52,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:15:52,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:52,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:52,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:52,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:52,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:52,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898505857] [2020-10-12 16:15:52,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:52,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:15:52,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498285712] [2020-10-12 16:15:52,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:15:52,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:52,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:15:52,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:15:52,182 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2020-10-12 16:15:52,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:52,204 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-12 16:15:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:15:52,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-12 16:15:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:52,206 INFO L225 Difference]: With dead ends: 21 [2020-10-12 16:15:52,206 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 16:15:52,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:15:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 16:15:52,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-12 16:15:52,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-12 16:15:52,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-12 16:15:52,212 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-10-12 16:15:52,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:52,213 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-12 16:15:52,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:15:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-12 16:15:52,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:15:52,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:52,214 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:52,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:15:52,215 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:52,215 INFO L82 PathProgramCache]: Analyzing trace with hash 90549802, now seen corresponding path program 3 times [2020-10-12 16:15:52,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:52,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924189958] [2020-10-12 16:15:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:52,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:52,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:52,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:52,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:15:52,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:52,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-12 16:15:52,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:15:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:52,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:15:52,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:52,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:52,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:52,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:52,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:52,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:52,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:52,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:52,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:52,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:52,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:52,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:52,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924189958] [2020-10-12 16:15:52,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:52,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:15:52,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131542983] [2020-10-12 16:15:52,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:15:52,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:52,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:15:52,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:15:52,432 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-10-12 16:15:52,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:52,475 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-10-12 16:15:52,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:15:52,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-12 16:15:52,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:52,478 INFO L225 Difference]: With dead ends: 22 [2020-10-12 16:15:52,478 INFO L226 Difference]: Without dead ends: 17 [2020-10-12 16:15:52,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:15:52,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-12 16:15:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-12 16:15:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 16:15:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-12 16:15:52,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-12 16:15:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:52,483 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-12 16:15:52,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:15:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-12 16:15:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:15:52,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:52,485 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:52,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:15:52,485 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:52,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:52,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1452385674, now seen corresponding path program 4 times [2020-10-12 16:15:52,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:52,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742085674] [2020-10-12 16:15:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:52,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:52,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:52,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:52,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:15:52,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:52,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-12 16:15:52,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:52,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:15:52,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:52,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:15:52,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:52,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:52,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:52,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:52,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:52,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:52,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:52,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:52,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:52,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:52,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:52,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:52,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742085674] [2020-10-12 16:15:52,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:52,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:15:52,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224905041] [2020-10-12 16:15:52,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:15:52,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:52,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:15:52,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:15:52,626 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2020-10-12 16:15:52,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:52,648 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-10-12 16:15:52,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:15:52,649 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-12 16:15:52,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:52,649 INFO L225 Difference]: With dead ends: 23 [2020-10-12 16:15:52,650 INFO L226 Difference]: Without dead ends: 18 [2020-10-12 16:15:52,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:15:52,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-12 16:15:52,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-12 16:15:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-12 16:15:52,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-12 16:15:52,655 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-10-12 16:15:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:52,655 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-12 16:15:52,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:15:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-12 16:15:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:15:52,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:52,656 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:52,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:15:52,657 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:52,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:52,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2038745174, now seen corresponding path program 5 times [2020-10-12 16:15:52,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:52,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256726016] [2020-10-12 16:15:52,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:52,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:52,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:52,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:52,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:15:52,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:52,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-12 16:15:52,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:52,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:15:52,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:52,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:15:52,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:52,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:52,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:52,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:52,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:52,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:52,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:52,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:52,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:52,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:52,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:52,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:52,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256726016] [2020-10-12 16:15:52,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:52,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:15:52,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206808422] [2020-10-12 16:15:52,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:15:52,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:52,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:15:52,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:15:52,812 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 8 states. [2020-10-12 16:15:52,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:52,832 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-12 16:15:52,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:15:52,833 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-12 16:15:52,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:52,834 INFO L225 Difference]: With dead ends: 24 [2020-10-12 16:15:52,834 INFO L226 Difference]: Without dead ends: 19 [2020-10-12 16:15:52,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:15:52,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-12 16:15:52,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-12 16:15:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 16:15:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-12 16:15:52,839 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-12 16:15:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:52,840 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-12 16:15:52,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:15:52,840 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-12 16:15:52,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:15:52,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:52,841 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:52,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:15:52,842 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:52,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:52,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1258946806, now seen corresponding path program 6 times [2020-10-12 16:15:52,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:52,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429599661] [2020-10-12 16:15:52,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:52,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:52,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:52,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:52,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:15:52,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:52,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-12 16:15:52,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:52,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:15:52,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:52,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:15:52,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:53,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:53,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:53,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:53,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:53,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:53,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:53,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:53,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:53,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:53,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:53,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:53,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429599661] [2020-10-12 16:15:53,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:53,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:15:53,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567922923] [2020-10-12 16:15:53,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:15:53,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:53,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:15:53,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:15:53,052 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 9 states. [2020-10-12 16:15:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:53,084 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-10-12 16:15:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:15:53,084 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-12 16:15:53,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:53,085 INFO L225 Difference]: With dead ends: 25 [2020-10-12 16:15:53,085 INFO L226 Difference]: Without dead ends: 20 [2020-10-12 16:15:53,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:15:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-12 16:15:53,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-12 16:15:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 16:15:53,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-12 16:15:53,093 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-10-12 16:15:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:53,093 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-12 16:15:53,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:15:53,094 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-12 16:15:53,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:15:53,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:53,095 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:53,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:15:53,097 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:53,097 INFO L82 PathProgramCache]: Analyzing trace with hash 408183082, now seen corresponding path program 7 times [2020-10-12 16:15:53,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:53,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196163753] [2020-10-12 16:15:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:53,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:53,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:53,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:53,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:15:53,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:53,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-12 16:15:53,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:53,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:15:53,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:53,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:15:53,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:53,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:53,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:53,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:53,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:53,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:53,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:53,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:53,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:53,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:53,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:53,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:53,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196163753] [2020-10-12 16:15:53,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:53,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:15:53,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457053987] [2020-10-12 16:15:53,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:15:53,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:53,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:15:53,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:15:53,383 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2020-10-12 16:15:53,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:53,415 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-12 16:15:53,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:15:53,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-12 16:15:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:53,416 INFO L225 Difference]: With dead ends: 26 [2020-10-12 16:15:53,416 INFO L226 Difference]: Without dead ends: 21 [2020-10-12 16:15:53,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:15:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-12 16:15:53,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-12 16:15:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 16:15:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-12 16:15:53,421 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-12 16:15:53,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:53,422 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-12 16:15:53,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:15:53,422 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-12 16:15:53,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:15:53,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:53,423 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:53,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:15:53,423 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:53,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:53,424 INFO L82 PathProgramCache]: Analyzing trace with hash -195688586, now seen corresponding path program 8 times [2020-10-12 16:15:53,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:53,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775030484] [2020-10-12 16:15:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:53,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:53,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:53,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:53,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:15:53,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:53,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-12 16:15:53,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:53,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:15:53,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:53,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:15:53,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:53,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:53,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:53,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:53,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:53,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:53,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:53,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:53,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:53,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:53,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:53,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:53,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775030484] [2020-10-12 16:15:53,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:53,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:15:53,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616292878] [2020-10-12 16:15:53,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:15:53,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:53,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:15:53,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:15:53,681 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 11 states. [2020-10-12 16:15:53,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:53,713 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-12 16:15:53,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:15:53,714 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-12 16:15:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:53,714 INFO L225 Difference]: With dead ends: 27 [2020-10-12 16:15:53,714 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 16:15:53,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:15:53,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 16:15:53,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-12 16:15:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 16:15:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-12 16:15:53,719 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2020-10-12 16:15:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:53,720 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-12 16:15:53,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:15:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-12 16:15:53,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:15:53,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:53,721 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:53,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:15:53,722 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:53,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:53,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1735841110, now seen corresponding path program 9 times [2020-10-12 16:15:53,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:53,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736142980] [2020-10-12 16:15:53,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:53,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:53,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:53,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:53,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:15:53,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:53,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-12 16:15:53,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:53,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:15:53,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:53,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:15:53,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:54,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:54,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:54,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:54,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:54,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:54,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:54,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:54,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:54,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:54,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:54,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:54,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736142980] [2020-10-12 16:15:54,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:54,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:15:54,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530126121] [2020-10-12 16:15:54,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:15:54,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:54,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:15:54,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:15:54,021 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 12 states. [2020-10-12 16:15:54,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:54,049 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-12 16:15:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:15:54,050 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-12 16:15:54,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:54,050 INFO L225 Difference]: With dead ends: 28 [2020-10-12 16:15:54,050 INFO L226 Difference]: Without dead ends: 23 [2020-10-12 16:15:54,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:15:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-12 16:15:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-12 16:15:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 16:15:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-12 16:15:54,055 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-12 16:15:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:54,055 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-12 16:15:54,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:15:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-12 16:15:54,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:15:54,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:54,056 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:54,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:15:54,057 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:54,057 INFO L82 PathProgramCache]: Analyzing trace with hash 2059038198, now seen corresponding path program 10 times [2020-10-12 16:15:54,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:54,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696450933] [2020-10-12 16:15:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:54,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:54,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:54,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:54,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:15:54,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:54,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-12 16:15:54,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:54,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:15:54,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:54,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:15:54,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:54,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:54,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:54,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:54,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:54,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:54,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:54,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:54,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:54,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:54,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:54,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:54,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696450933] [2020-10-12 16:15:54,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:54,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:15:54,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212670422] [2020-10-12 16:15:54,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:15:54,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:54,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:15:54,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:15:54,382 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 13 states. [2020-10-12 16:15:54,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:54,419 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-12 16:15:54,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:15:54,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-12 16:15:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:54,421 INFO L225 Difference]: With dead ends: 29 [2020-10-12 16:15:54,421 INFO L226 Difference]: Without dead ends: 24 [2020-10-12 16:15:54,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:15:54,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-12 16:15:54,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-12 16:15:54,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-12 16:15:54,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-12 16:15:54,425 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2020-10-12 16:15:54,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:54,425 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-12 16:15:54,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:15:54,425 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-12 16:15:54,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:15:54,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:54,426 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:54,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:15:54,427 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:54,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:54,427 INFO L82 PathProgramCache]: Analyzing trace with hash -558787542, now seen corresponding path program 11 times [2020-10-12 16:15:54,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:54,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315482804] [2020-10-12 16:15:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:54,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:54,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:54,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:54,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:15:54,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:54,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-12 16:15:54,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:54,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:15:54,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:54,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:15:54,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:54,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:54,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:54,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:54,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:54,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:54,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:54,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:54,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:54,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:54,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:54,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:54,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315482804] [2020-10-12 16:15:54,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:54,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:15:54,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795993454] [2020-10-12 16:15:54,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:15:54,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:54,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:15:54,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:15:54,779 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2020-10-12 16:15:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:54,805 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-12 16:15:54,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:15:54,806 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-12 16:15:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:54,807 INFO L225 Difference]: With dead ends: 30 [2020-10-12 16:15:54,807 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:15:54,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:15:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:15:54,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-12 16:15:54,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 16:15:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-12 16:15:54,811 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-10-12 16:15:54,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:54,811 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-12 16:15:54,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:15:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-12 16:15:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:15:54,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:54,812 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:54,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:15:54,813 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:54,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:54,813 INFO L82 PathProgramCache]: Analyzing trace with hash -107006858, now seen corresponding path program 12 times [2020-10-12 16:15:54,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:54,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201058776] [2020-10-12 16:15:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:54,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:54,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:55,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:55,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:15:55,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:55,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-12 16:15:55,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:55,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:15:55,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:55,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:15:55,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:55,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:55,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:55,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:55,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:55,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:55,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:55,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:55,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:55,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:55,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:55,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:55,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201058776] [2020-10-12 16:15:55,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:55,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:15:55,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933272518] [2020-10-12 16:15:55,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:15:55,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:55,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:15:55,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:15:55,192 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 15 states. [2020-10-12 16:15:55,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:55,224 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-12 16:15:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:15:55,225 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-12 16:15:55,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:55,226 INFO L225 Difference]: With dead ends: 31 [2020-10-12 16:15:55,226 INFO L226 Difference]: Without dead ends: 26 [2020-10-12 16:15:55,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:15:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-12 16:15:55,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-12 16:15:55,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 16:15:55,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-12 16:15:55,230 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2020-10-12 16:15:55,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:55,230 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-12 16:15:55,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:15:55,231 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-12 16:15:55,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:15:55,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:55,231 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:55,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:15:55,232 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:55,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:55,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1013292458, now seen corresponding path program 13 times [2020-10-12 16:15:55,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:55,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483615534] [2020-10-12 16:15:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:55,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:55,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:55,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:55,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:15:55,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:55,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-12 16:15:55,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:55,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:15:55,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:55,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:15:55,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:55,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:55,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:55,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:55,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:55,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:55,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:55,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:55,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:55,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:55,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:55,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:55,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483615534] [2020-10-12 16:15:55,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:55,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:15:55,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982849380] [2020-10-12 16:15:55,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:15:55,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:55,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:15:55,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:15:55,660 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 16 states. [2020-10-12 16:15:55,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:55,694 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-12 16:15:55,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:15:55,695 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-12 16:15:55,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:55,695 INFO L225 Difference]: With dead ends: 32 [2020-10-12 16:15:55,696 INFO L226 Difference]: Without dead ends: 27 [2020-10-12 16:15:55,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:15:55,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-12 16:15:55,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-12 16:15:55,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 16:15:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-12 16:15:55,699 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-10-12 16:15:55,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:55,700 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-12 16:15:55,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:15:55,700 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-12 16:15:55,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:15:55,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:55,701 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:55,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:15:55,701 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:55,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1382832886, now seen corresponding path program 14 times [2020-10-12 16:15:55,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:55,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653636093] [2020-10-12 16:15:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:55,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:55,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:55,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:55,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:15:55,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:55,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-12 16:15:55,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:55,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:15:55,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:55,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:15:55,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:56,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:56,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:56,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:56,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:56,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:56,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:56,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:56,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:56,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:56,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:56,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:56,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653636093] [2020-10-12 16:15:56,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:56,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:15:56,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919520213] [2020-10-12 16:15:56,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:15:56,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:56,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:15:56,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:15:56,156 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 17 states. [2020-10-12 16:15:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:56,190 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-12 16:15:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:15:56,191 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-12 16:15:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:56,191 INFO L225 Difference]: With dead ends: 33 [2020-10-12 16:15:56,192 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 16:15:56,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:15:56,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 16:15:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-12 16:15:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 16:15:56,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-12 16:15:56,195 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2020-10-12 16:15:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:56,196 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-12 16:15:56,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:15:56,196 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-12 16:15:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:15:56,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:56,197 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:56,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:15:56,198 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:56,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:56,198 INFO L82 PathProgramCache]: Analyzing trace with hash -46315734, now seen corresponding path program 15 times [2020-10-12 16:15:56,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:56,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842066892] [2020-10-12 16:15:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:56,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:56,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:56,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:56,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:15:56,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:56,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-12 16:15:56,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:56,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:15:56,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:56,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:15:56,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:56,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:56,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:56,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:56,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:56,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:56,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:56,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:56,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:56,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:56,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:56,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:56,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842066892] [2020-10-12 16:15:56,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:56,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:15:56,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515828636] [2020-10-12 16:15:56,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:15:56,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:56,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:15:56,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:15:56,717 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 18 states. [2020-10-12 16:15:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:56,750 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-12 16:15:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:15:56,751 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-12 16:15:56,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:56,752 INFO L225 Difference]: With dead ends: 34 [2020-10-12 16:15:56,752 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 16:15:56,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:15:56,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 16:15:56,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-12 16:15:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 16:15:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-12 16:15:56,756 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2020-10-12 16:15:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:56,756 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-12 16:15:56,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:15:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-12 16:15:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:15:56,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:56,757 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:56,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:15:56,758 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:56,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:56,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1400249994, now seen corresponding path program 16 times [2020-10-12 16:15:56,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:56,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161058885] [2020-10-12 16:15:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:56,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:56,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:57,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:57,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:15:57,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:57,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-12 16:15:57,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:57,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:15:57,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:57,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:15:57,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:57,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:57,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:57,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:57,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:57,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:57,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:57,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:57,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:57,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:57,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:57,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:57,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161058885] [2020-10-12 16:15:57,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:57,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:15:57,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928237766] [2020-10-12 16:15:57,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:15:57,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:57,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:15:57,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:15:57,401 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 19 states. [2020-10-12 16:15:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:57,444 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-12 16:15:57,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:15:57,445 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-12 16:15:57,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:57,446 INFO L225 Difference]: With dead ends: 35 [2020-10-12 16:15:57,447 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 16:15:57,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:15:57,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 16:15:57,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-12 16:15:57,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 16:15:57,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-12 16:15:57,457 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2020-10-12 16:15:57,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:57,457 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-12 16:15:57,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:15:57,457 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-12 16:15:57,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:15:57,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:57,458 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:57,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:15:57,459 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:57,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:57,461 INFO L82 PathProgramCache]: Analyzing trace with hash -422539094, now seen corresponding path program 17 times [2020-10-12 16:15:57,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:57,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918344015] [2020-10-12 16:15:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:57,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:57,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:57,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:57,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:15:57,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:57,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-12 16:15:57,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:57,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:15:57,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:57,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:15:57,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:58,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:58,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:58,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:58,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:58,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:58,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:58,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:58,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:58,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:58,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:58,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:58,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918344015] [2020-10-12 16:15:58,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:58,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:15:58,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17203541] [2020-10-12 16:15:58,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:15:58,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:58,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:15:58,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:15:58,157 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 20 states. [2020-10-12 16:15:58,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:58,195 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-12 16:15:58,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:15:58,195 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-12 16:15:58,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:58,196 INFO L225 Difference]: With dead ends: 36 [2020-10-12 16:15:58,196 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 16:15:58,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:15:58,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 16:15:58,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-12 16:15:58,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 16:15:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-12 16:15:58,200 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-10-12 16:15:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:58,200 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-12 16:15:58,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:15:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-12 16:15:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:15:58,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:58,201 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:58,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:15:58,202 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:58,202 INFO L82 PathProgramCache]: Analyzing trace with hash -178272266, now seen corresponding path program 18 times [2020-10-12 16:15:58,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:58,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643300728] [2020-10-12 16:15:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:58,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:58,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:58,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:58,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:15:58,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:58,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-12 16:15:58,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:58,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:15:58,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:58,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:15:58,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:58,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:58,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:58,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:58,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:58,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:58,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:58,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:58,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:58,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:58,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:58,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:58,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643300728] [2020-10-12 16:15:58,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:58,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:15:58,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726847134] [2020-10-12 16:15:58,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:15:58,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:58,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:15:58,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:15:58,769 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 21 states. [2020-10-12 16:15:58,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:58,803 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-12 16:15:58,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:15:58,803 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-12 16:15:58,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:58,804 INFO L225 Difference]: With dead ends: 37 [2020-10-12 16:15:58,804 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 16:15:58,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:15:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 16:15:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-12 16:15:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 16:15:58,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-12 16:15:58,810 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2020-10-12 16:15:58,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:58,810 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-12 16:15:58,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:15:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-12 16:15:58,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:15:58,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:58,812 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:58,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:15:58,813 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:58,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1195935190, now seen corresponding path program 19 times [2020-10-12 16:15:58,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:58,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956619951] [2020-10-12 16:15:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:58,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:58,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:59,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:59,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:15:59,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:59,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-12 16:15:59,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:59,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:15:59,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:59,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:15:59,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:59,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:59,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:59,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:59,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:59,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:59,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:59,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:59,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:59,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:59,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956619951] [2020-10-12 16:15:59,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:59,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:15:59,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331524907] [2020-10-12 16:15:59,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:15:59,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:59,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:15:59,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:15:59,576 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 22 states. [2020-10-12 16:15:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:59,617 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-12 16:15:59,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:15:59,617 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-12 16:15:59,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:59,618 INFO L225 Difference]: With dead ends: 38 [2020-10-12 16:15:59,618 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 16:15:59,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:15:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 16:15:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-12 16:15:59,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 16:15:59,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-12 16:15:59,623 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-10-12 16:15:59,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:59,625 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-12 16:15:59,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:15:59,625 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-12 16:15:59,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:15:59,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:59,626 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:59,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:15:59,626 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:59,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:59,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1616252534, now seen corresponding path program 20 times [2020-10-12 16:15:59,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:59,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094378314] [2020-10-12 16:15:59,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:59,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:59,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:00,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:00,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:16:00,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:00,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-12 16:16:00,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:00,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:16:00,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:00,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:16:00,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:00,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:00,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:00,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:00,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:00,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:00,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:00,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:00,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:00,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:00,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:00,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:00,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094378314] [2020-10-12 16:16:00,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:00,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:16:00,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611226234] [2020-10-12 16:16:00,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:16:00,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:00,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:16:00,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:16:00,500 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 23 states. [2020-10-12 16:16:00,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:00,547 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-12 16:16:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:16:00,547 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-12 16:16:00,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:00,548 INFO L225 Difference]: With dead ends: 39 [2020-10-12 16:16:00,548 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 16:16:00,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:16:00,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 16:16:00,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-12 16:16:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 16:16:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-12 16:16:00,554 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2020-10-12 16:16:00,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:00,554 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-12 16:16:00,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:16:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-12 16:16:00,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:16:00,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:00,555 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:00,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:16:00,556 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:00,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:00,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1400241238, now seen corresponding path program 21 times [2020-10-12 16:16:00,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:00,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500584080] [2020-10-12 16:16:00,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:00,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:00,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:01,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:01,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:16:01,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:01,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-12 16:16:01,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:01,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:16:01,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:01,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:16:01,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:01,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:01,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:01,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:01,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:01,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:01,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:01,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:01,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:01,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:01,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:01,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:01,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500584080] [2020-10-12 16:16:01,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:01,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:16:01,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811563371] [2020-10-12 16:16:01,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:16:01,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:01,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:16:01,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:16:01,372 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 24 states. [2020-10-12 16:16:01,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:01,419 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-12 16:16:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:16:01,421 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-12 16:16:01,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:01,422 INFO L225 Difference]: With dead ends: 40 [2020-10-12 16:16:01,422 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 16:16:01,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:16:01,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 16:16:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-12 16:16:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 16:16:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-12 16:16:01,433 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2020-10-12 16:16:01,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:01,433 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-12 16:16:01,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:16:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-12 16:16:01,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:16:01,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:01,434 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:01,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:16:01,435 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:01,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:01,438 INFO L82 PathProgramCache]: Analyzing trace with hash -422267658, now seen corresponding path program 22 times [2020-10-12 16:16:01,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:01,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160400563] [2020-10-12 16:16:01,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:01,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:01,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:01,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:01,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:16:01,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:01,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-12 16:16:01,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:01,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:16:01,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:01,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:16:01,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:02,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:02,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:02,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:02,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:02,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:02,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:02,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:02,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:02,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:02,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:02,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:02,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160400563] [2020-10-12 16:16:02,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:02,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:16:02,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242039113] [2020-10-12 16:16:02,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:16:02,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:02,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:16:02,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:16:02,246 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 25 states. [2020-10-12 16:16:02,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:02,290 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-12 16:16:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:16:02,291 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-12 16:16:02,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:02,291 INFO L225 Difference]: With dead ends: 41 [2020-10-12 16:16:02,291 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 16:16:02,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:16:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 16:16:02,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-12 16:16:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 16:16:02,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-12 16:16:02,296 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2020-10-12 16:16:02,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:02,297 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-12 16:16:02,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:16:02,297 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-12 16:16:02,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:16:02,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:02,298 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:02,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:16:02,298 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:02,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:02,299 INFO L82 PathProgramCache]: Analyzing trace with hash -169857750, now seen corresponding path program 23 times [2020-10-12 16:16:02,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:02,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864585001] [2020-10-12 16:16:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:02,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:02,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:02,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:02,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:16:02,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:02,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 573 [2020-10-12 16:16:02,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:02,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:16:02,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:02,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:16:02,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:03,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:03,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:03,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:03,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:03,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:03,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:03,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:03,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:03,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:03,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:03,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:03,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864585001] [2020-10-12 16:16:03,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:03,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:16:03,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525795602] [2020-10-12 16:16:03,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:16:03,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:03,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:16:03,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:16:03,269 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 26 states. [2020-10-12 16:16:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:03,306 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-12 16:16:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:16:03,306 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-12 16:16:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:03,307 INFO L225 Difference]: With dead ends: 42 [2020-10-12 16:16:03,307 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 16:16:03,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:16:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 16:16:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-12 16:16:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 16:16:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-12 16:16:03,311 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2020-10-12 16:16:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:03,311 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-12 16:16:03,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:16:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-12 16:16:03,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:16:03,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:03,312 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:03,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:16:03,313 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:03,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash -935085194, now seen corresponding path program 24 times [2020-10-12 16:16:03,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:03,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644681274] [2020-10-12 16:16:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:03,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:03,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:03,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:03,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:16:03,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:03,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-12 16:16:03,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:03,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:16:03,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:03,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:16:03,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:04,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:04,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:04,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:04,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:04,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:04,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:04,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:04,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:04,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:04,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:04,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:04,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644681274] [2020-10-12 16:16:04,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:04,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:16:04,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293242656] [2020-10-12 16:16:04,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:16:04,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:04,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:16:04,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:16:04,247 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 27 states. [2020-10-12 16:16:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:04,299 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-12 16:16:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:16:04,300 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-12 16:16:04,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:04,301 INFO L225 Difference]: With dead ends: 43 [2020-10-12 16:16:04,301 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 16:16:04,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:16:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 16:16:04,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-12 16:16:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 16:16:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-12 16:16:04,310 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2020-10-12 16:16:04,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:04,311 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-12 16:16:04,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:16:04,311 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-12 16:16:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:16:04,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:04,311 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:04,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:16:04,312 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:04,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1112667818, now seen corresponding path program 25 times [2020-10-12 16:16:04,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:04,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612115987] [2020-10-12 16:16:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:04,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:04,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:04,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:04,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:16:04,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:04,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-12 16:16:04,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:04,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:16:04,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:04,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:16:04,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:05,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:05,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:05,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:05,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:05,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:05,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:05,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:05,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:05,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:05,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612115987] [2020-10-12 16:16:05,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:05,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:16:05,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191518032] [2020-10-12 16:16:05,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:16:05,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:05,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:16:05,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:16:05,320 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 28 states. [2020-10-12 16:16:05,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:05,390 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-12 16:16:05,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:16:05,391 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-12 16:16:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:05,391 INFO L225 Difference]: With dead ends: 44 [2020-10-12 16:16:05,392 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 16:16:05,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:16:05,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 16:16:05,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-12 16:16:05,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 16:16:05,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-12 16:16:05,395 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2020-10-12 16:16:05,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:05,395 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-12 16:16:05,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:16:05,396 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-12 16:16:05,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:16:05,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:05,396 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:05,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:16:05,397 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:05,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:05,398 INFO L82 PathProgramCache]: Analyzing trace with hash 168501750, now seen corresponding path program 26 times [2020-10-12 16:16:05,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:05,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989156858] [2020-10-12 16:16:05,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:05,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:05,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:05,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:05,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:16:05,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:05,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-12 16:16:05,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:05,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:16:05,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:05,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:16:05,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:06,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:06,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:06,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:06,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:06,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:06,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:06,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:06,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:06,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:06,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:06,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:06,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989156858] [2020-10-12 16:16:06,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:06,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:16:06,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450899430] [2020-10-12 16:16:06,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:16:06,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:06,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:16:06,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:16:06,472 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 29 states. [2020-10-12 16:16:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:06,538 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-12 16:16:06,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:16:06,541 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-12 16:16:06,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:06,542 INFO L225 Difference]: With dead ends: 45 [2020-10-12 16:16:06,542 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 16:16:06,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:16:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 16:16:06,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 16:16:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 16:16:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-12 16:16:06,545 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2020-10-12 16:16:06,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:06,545 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-12 16:16:06,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:16:06,546 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-12 16:16:06,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:16:06,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:06,546 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:06,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:16:06,547 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:06,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:06,547 INFO L82 PathProgramCache]: Analyzing trace with hash 964124714, now seen corresponding path program 27 times [2020-10-12 16:16:06,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:06,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609897657] [2020-10-12 16:16:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:06,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:06,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:07,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:07,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:16:07,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:07,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-10-12 16:16:07,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:07,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:16:07,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:07,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:16:07,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:07,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:07,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:07,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:07,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:07,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:07,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:07,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:07,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:07,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:07,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:07,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:07,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609897657] [2020-10-12 16:16:07,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:07,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:16:07,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998494564] [2020-10-12 16:16:07,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:16:07,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:07,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:16:07,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:16:07,611 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 30 states. [2020-10-12 16:16:07,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:07,668 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-12 16:16:07,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:16:07,669 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-10-12 16:16:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:07,670 INFO L225 Difference]: With dead ends: 46 [2020-10-12 16:16:07,670 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 16:16:07,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:16:07,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 16:16:07,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-12 16:16:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 16:16:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-12 16:16:07,673 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2020-10-12 16:16:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:07,674 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-12 16:16:07,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:16:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-12 16:16:07,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 16:16:07,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:07,674 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:07,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:16:07,675 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:07,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:07,675 INFO L82 PathProgramCache]: Analyzing trace with hash -141367178, now seen corresponding path program 28 times [2020-10-12 16:16:07,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:07,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008462871] [2020-10-12 16:16:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:07,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:07,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:08,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:08,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 16:16:08,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:08,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-12 16:16:08,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:08,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 16:16:08,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:08,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:16:08,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:08,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:08,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:08,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:08,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:08,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:08,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:08,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:08,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:08,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:08,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:08,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:08,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008462871] [2020-10-12 16:16:08,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:08,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:16:08,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475061710] [2020-10-12 16:16:08,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:16:08,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:08,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:16:08,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:16:08,883 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 31 states. [2020-10-12 16:16:08,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:08,948 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-12 16:16:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:16:08,948 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-10-12 16:16:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:08,949 INFO L225 Difference]: With dead ends: 47 [2020-10-12 16:16:08,949 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 16:16:08,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:16:08,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 16:16:08,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-12 16:16:08,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 16:16:08,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-12 16:16:08,952 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2020-10-12 16:16:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:08,952 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-12 16:16:08,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 16:16:08,953 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-12 16:16:08,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:16:08,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:08,953 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:08,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:16:08,953 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash -51877462, now seen corresponding path program 29 times [2020-10-12 16:16:08,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:08,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018632618] [2020-10-12 16:16:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:08,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:08,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:09,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:09,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:16:09,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:09,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-12 16:16:09,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:09,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:16:09,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:09,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:16:09,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:10,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:10,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:10,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:10,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:10,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:10,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:10,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:10,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:10,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:10,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:10,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:10,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018632618] [2020-10-12 16:16:10,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:10,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:16:10,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307352529] [2020-10-12 16:16:10,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:16:10,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:10,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:16:10,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:16:10,136 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 32 states. [2020-10-12 16:16:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:10,226 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-12 16:16:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:16:10,229 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-12 16:16:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:10,230 INFO L225 Difference]: With dead ends: 48 [2020-10-12 16:16:10,230 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 16:16:10,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:16:10,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 16:16:10,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-12 16:16:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 16:16:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-12 16:16:10,239 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2020-10-12 16:16:10,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:10,240 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-12 16:16:10,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:16:10,240 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-12 16:16:10,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 16:16:10,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:10,240 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:10,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:16:10,241 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:10,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:10,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1572663562, now seen corresponding path program 30 times [2020-10-12 16:16:10,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:10,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122989667] [2020-10-12 16:16:10,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:10,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:10,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:11,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:11,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 16:16:11,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:11,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 984 [2020-10-12 16:16:11,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:11,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:16:11,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:11,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:16:11,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:11,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:11,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:11,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:11,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:11,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:11,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:11,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:11,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:11,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:11,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:11,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:11,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122989667] [2020-10-12 16:16:11,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:11,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:16:11,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623428773] [2020-10-12 16:16:11,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:16:11,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:11,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:16:11,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:16:11,882 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 33 states. [2020-10-12 16:16:11,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:11,952 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-12 16:16:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:16:11,954 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2020-10-12 16:16:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:11,955 INFO L225 Difference]: With dead ends: 49 [2020-10-12 16:16:11,955 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 16:16:11,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:16:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 16:16:11,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-12 16:16:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 16:16:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-12 16:16:11,962 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2020-10-12 16:16:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:11,963 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-12 16:16:11,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:16:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-12 16:16:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 16:16:11,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:11,964 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:11,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:16:11,965 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:11,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:11,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1472392406, now seen corresponding path program 31 times [2020-10-12 16:16:11,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:11,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213401010] [2020-10-12 16:16:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:11,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:11,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:12,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:12,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:16:12,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:12,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-10-12 16:16:12,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:12,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:16:12,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:12,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:16:12,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:13,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:13,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:13,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:13,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:13,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:13,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:13,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:13,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:13,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:13,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:13,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:13,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213401010] [2020-10-12 16:16:13,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:13,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:16:13,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139493866] [2020-10-12 16:16:13,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:16:13,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:13,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:16:13,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:16:13,445 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 34 states. [2020-10-12 16:16:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:13,511 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-12 16:16:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:16:13,511 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-12 16:16:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:13,512 INFO L225 Difference]: With dead ends: 50 [2020-10-12 16:16:13,512 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 16:16:13,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:16:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 16:16:13,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-12 16:16:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 16:16:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-12 16:16:13,516 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-10-12 16:16:13,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:13,517 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-12 16:16:13,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:16:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-12 16:16:13,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 16:16:13,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:13,518 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:13,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:16:13,518 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:13,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:13,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1636013430, now seen corresponding path program 32 times [2020-10-12 16:16:13,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:13,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101117815] [2020-10-12 16:16:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:13,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:13,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:14,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:14,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 16:16:14,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:14,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-12 16:16:14,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:14,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 16:16:14,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:14,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:16:14,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:14,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:14,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:14,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:14,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:14,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:14,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:14,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:14,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:14,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:14,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:14,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:14,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101117815] [2020-10-12 16:16:14,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:14,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 16:16:14,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872915020] [2020-10-12 16:16:14,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 16:16:14,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:14,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 16:16:14,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:16:14,786 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 35 states. [2020-10-12 16:16:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:14,864 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-12 16:16:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:16:14,865 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-10-12 16:16:14,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:14,866 INFO L225 Difference]: With dead ends: 51 [2020-10-12 16:16:14,866 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 16:16:14,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:16:14,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 16:16:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-12 16:16:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 16:16:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-12 16:16:14,872 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2020-10-12 16:16:14,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:14,872 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-12 16:16:14,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 16:16:14,872 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-12 16:16:14,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 16:16:14,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:14,873 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:14,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:16:14,873 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:14,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:14,874 INFO L82 PathProgramCache]: Analyzing trace with hash -787653462, now seen corresponding path program 33 times [2020-10-12 16:16:14,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:14,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404658091] [2020-10-12 16:16:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:14,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:14,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:15,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:15,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 16:16:15,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:15,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-12 16:16:15,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:15,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:16:15,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:15,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 16:16:15,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:16,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:16,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:16,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:16,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:16,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:16,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:16,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:16,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:16,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:16,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:16,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 16:16:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:16,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404658091] [2020-10-12 16:16:16,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:16,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:16:16,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108608811] [2020-10-12 16:16:16,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:16:16,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:16,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:16:16,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:16:16,345 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 36 states. [2020-10-12 16:16:16,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:16,401 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-12 16:16:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:16:16,402 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-12 16:16:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:16,402 INFO L225 Difference]: With dead ends: 52 [2020-10-12 16:16:16,403 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 16:16:16,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:16:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 16:16:16,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-12 16:16:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 16:16:16,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-12 16:16:16,406 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2020-10-12 16:16:16,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:16,407 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-12 16:16:16,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 16:16:16,407 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-12 16:16:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 16:16:16,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:16,410 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:16,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:16:16,410 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:16,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:16,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1388084214, now seen corresponding path program 34 times [2020-10-12 16:16:16,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:16,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15449575] [2020-10-12 16:16:16,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:16,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:16,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:16,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:16,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 16:16:16,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:16,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 562 [2020-10-12 16:16:16,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:16,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:16:16,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:16,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:16:16,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:17,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:17,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:17,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:17,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:17,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:17,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:17,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:17,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:17,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:17,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:17,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:17,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15449575] [2020-10-12 16:16:17,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:17,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:16:17,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235485486] [2020-10-12 16:16:17,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:16:17,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:17,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:16:17,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:16:17,799 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 37 states. [2020-10-12 16:16:17,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:17,868 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-12 16:16:17,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:16:17,868 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2020-10-12 16:16:17,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:17,869 INFO L225 Difference]: With dead ends: 53 [2020-10-12 16:16:17,869 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 16:16:17,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:16:17,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 16:16:17,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-12 16:16:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 16:16:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-12 16:16:17,874 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2020-10-12 16:16:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:17,875 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-12 16:16:17,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:16:17,875 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-12 16:16:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 16:16:17,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:17,877 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:17,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:16:17,878 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:17,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:17,878 INFO L82 PathProgramCache]: Analyzing trace with hash 116475434, now seen corresponding path program 35 times [2020-10-12 16:16:17,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:17,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161043032] [2020-10-12 16:16:17,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:17,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:17,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:18,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:18,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 16:16:18,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:18,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-12 16:16:18,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:18,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:16:18,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:18,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 16:16:18,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:19,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:19,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:19,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:19,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:19,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:19,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:19,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:19,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:19,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161043032] [2020-10-12 16:16:19,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:19,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:16:19,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383073458] [2020-10-12 16:16:19,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:16:19,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:19,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:16:19,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:16:19,331 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 38 states. [2020-10-12 16:16:19,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:19,402 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-12 16:16:19,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 16:16:19,403 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2020-10-12 16:16:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:19,404 INFO L225 Difference]: With dead ends: 54 [2020-10-12 16:16:19,404 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 16:16:19,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:16:19,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 16:16:19,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-12 16:16:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 16:16:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-12 16:16:19,408 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2020-10-12 16:16:19,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:19,408 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-12 16:16:19,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:16:19,408 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-12 16:16:19,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 16:16:19,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:19,409 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:19,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:16:19,409 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:19,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:19,409 INFO L82 PathProgramCache]: Analyzing trace with hash -648691082, now seen corresponding path program 36 times [2020-10-12 16:16:19,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:19,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465709522] [2020-10-12 16:16:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:19,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:19,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:20,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:20,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 16:16:20,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:20,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-12 16:16:20,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:20,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 16:16:20,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:20,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:16:20,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:20,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:20,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:20,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:20,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:20,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:20,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:20,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:20,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:20,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:20,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:20,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:20,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465709522] [2020-10-12 16:16:20,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:20,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 16:16:20,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814168012] [2020-10-12 16:16:20,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 16:16:20,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:20,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 16:16:20,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:16:20,977 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 39 states. [2020-10-12 16:16:21,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:21,048 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-12 16:16:21,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 16:16:21,049 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2020-10-12 16:16:21,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:21,050 INFO L225 Difference]: With dead ends: 55 [2020-10-12 16:16:21,050 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 16:16:21,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:16:21,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 16:16:21,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-12 16:16:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 16:16:21,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-12 16:16:21,054 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2020-10-12 16:16:21,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:21,054 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-12 16:16:21,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 16:16:21,054 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-12 16:16:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 16:16:21,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:21,055 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:21,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:16:21,055 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1400950698, now seen corresponding path program 37 times [2020-10-12 16:16:21,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:21,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057731756] [2020-10-12 16:16:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:21,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:21,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:21,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:21,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 16:16:21,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:21,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 653 [2020-10-12 16:16:21,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:21,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:16:21,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:21,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 16:16:21,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:22,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:22,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:22,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:22,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:22,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:22,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:22,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:22,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:22,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:22,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:22,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:22,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057731756] [2020-10-12 16:16:22,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:22,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 16:16:22,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117343056] [2020-10-12 16:16:22,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 16:16:22,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:22,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 16:16:22,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:16:22,623 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 40 states. [2020-10-12 16:16:22,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:22,678 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-12 16:16:22,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 16:16:22,679 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-12 16:16:22,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:22,679 INFO L225 Difference]: With dead ends: 56 [2020-10-12 16:16:22,679 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 16:16:22,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:16:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 16:16:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-12 16:16:22,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 16:16:22,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-12 16:16:22,683 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2020-10-12 16:16:22,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:22,683 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-12 16:16:22,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 16:16:22,683 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-12 16:16:22,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 16:16:22,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:22,684 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:22,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:16:22,684 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:22,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:22,685 INFO L82 PathProgramCache]: Analyzing trace with hash 515336438, now seen corresponding path program 38 times [2020-10-12 16:16:22,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:22,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796458074] [2020-10-12 16:16:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:22,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:22,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:23,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:23,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 16:16:23,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:23,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-12 16:16:23,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:23,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:16:23,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:23,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:16:23,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:24,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:24,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:24,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:24,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:24,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:24,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:24,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:24,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:24,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:24,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:24,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:24,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796458074] [2020-10-12 16:16:24,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:24,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:16:24,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845144565] [2020-10-12 16:16:24,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:16:24,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:24,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:16:24,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:16:24,329 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 41 states. [2020-10-12 16:16:24,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:24,405 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-12 16:16:24,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:16:24,405 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-10-12 16:16:24,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:24,406 INFO L225 Difference]: With dead ends: 57 [2020-10-12 16:16:24,406 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 16:16:24,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:16:24,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 16:16:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-12 16:16:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 16:16:24,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-12 16:16:24,409 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2020-10-12 16:16:24,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:24,410 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-12 16:16:24,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:16:24,410 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-12 16:16:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 16:16:24,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:24,411 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:24,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:16:24,411 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:24,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:24,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1168901846, now seen corresponding path program 39 times [2020-10-12 16:16:24,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:24,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408526084] [2020-10-12 16:16:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:24,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:24,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:25,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:25,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:16:25,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:25,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 758 [2020-10-12 16:16:25,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:25,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:16:25,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:25,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 16:16:25,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:26,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:26,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:26,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:26,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:26,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:26,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:26,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:26,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:26,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:26,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:26,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:26,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408526084] [2020-10-12 16:16:26,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:26,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:16:26,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200021722] [2020-10-12 16:16:26,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:16:26,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:26,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:16:26,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:16:26,176 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 42 states. [2020-10-12 16:16:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:26,243 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-12 16:16:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:16:26,244 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-12 16:16:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:26,245 INFO L225 Difference]: With dead ends: 58 [2020-10-12 16:16:26,245 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 16:16:26,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:16:26,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 16:16:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-12 16:16:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 16:16:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-12 16:16:26,250 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2020-10-12 16:16:26,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:26,250 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-12 16:16:26,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:16:26,250 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-12 16:16:26,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:16:26,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:26,251 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:26,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:16:26,251 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:26,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:26,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1840681098, now seen corresponding path program 40 times [2020-10-12 16:16:26,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:26,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008312932] [2020-10-12 16:16:26,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:26,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:26,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:27,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:27,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 16:16:27,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:27,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 766 [2020-10-12 16:16:27,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:27,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 16:16:27,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:27,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:16:27,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:28,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:28,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:28,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:28,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:28,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:28,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:28,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:28,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:28,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:28,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:28,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:28,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008312932] [2020-10-12 16:16:28,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:28,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 16:16:28,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068183011] [2020-10-12 16:16:28,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 16:16:28,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:28,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 16:16:28,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:16:28,086 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 43 states. [2020-10-12 16:16:28,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:28,164 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-12 16:16:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 16:16:28,165 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-10-12 16:16:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:28,166 INFO L225 Difference]: With dead ends: 59 [2020-10-12 16:16:28,166 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 16:16:28,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:16:28,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 16:16:28,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-12 16:16:28,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 16:16:28,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-12 16:16:28,169 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2020-10-12 16:16:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:28,169 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-12 16:16:28,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 16:16:28,170 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-12 16:16:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 16:16:28,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:28,170 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:28,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:16:28,171 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:28,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:28,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1191001430, now seen corresponding path program 41 times [2020-10-12 16:16:28,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:28,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531331991] [2020-10-12 16:16:28,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:28,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:28,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:29,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:29,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 16:16:29,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:29,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 852 [2020-10-12 16:16:29,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:29,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:16:29,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:29,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 16:16:29,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:30,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:30,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:30,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:30,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:30,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:30,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:30,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:30,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:30,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:30,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:30,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:30,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531331991] [2020-10-12 16:16:30,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:30,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 16:16:30,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810174426] [2020-10-12 16:16:30,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 16:16:30,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:30,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 16:16:30,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:16:30,204 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 44 states. [2020-10-12 16:16:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:30,296 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-12 16:16:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 16:16:30,297 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-12 16:16:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:30,298 INFO L225 Difference]: With dead ends: 60 [2020-10-12 16:16:30,298 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 16:16:30,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:16:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 16:16:30,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-12 16:16:30,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 16:16:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-12 16:16:30,300 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2020-10-12 16:16:30,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:30,301 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-12 16:16:30,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 16:16:30,301 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-12 16:16:30,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 16:16:30,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:30,301 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:30,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:16:30,302 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:30,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:30,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1769199094, now seen corresponding path program 42 times [2020-10-12 16:16:30,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:30,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054765500] [2020-10-12 16:16:30,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:30,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:30,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:31,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:31,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 16:16:31,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:31,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 892 [2020-10-12 16:16:31,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:31,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:16:31,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:31,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 16:16:31,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:32,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:32,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:32,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:32,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:32,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:32,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:32,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:32,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:32,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:32,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:32,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:32,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054765500] [2020-10-12 16:16:32,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:32,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:16:32,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54554811] [2020-10-12 16:16:32,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:16:32,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:32,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:16:32,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:16:32,352 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 45 states. [2020-10-12 16:16:32,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:32,429 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-12 16:16:32,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:16:32,430 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 53 [2020-10-12 16:16:32,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:32,430 INFO L225 Difference]: With dead ends: 61 [2020-10-12 16:16:32,430 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 16:16:32,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:16:32,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 16:16:32,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-12 16:16:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 16:16:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-12 16:16:32,434 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2020-10-12 16:16:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:32,434 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-12 16:16:32,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:16:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-12 16:16:32,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 16:16:32,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:32,435 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:32,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:16:32,436 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:32,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:32,436 INFO L82 PathProgramCache]: Analyzing trace with hash -953865174, now seen corresponding path program 43 times [2020-10-12 16:16:32,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:32,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558699146] [2020-10-12 16:16:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:32,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:32,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:33,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:33,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 16:16:33,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:33,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1142 [2020-10-12 16:16:33,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:33,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:16:33,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:33,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 16:16:33,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:34,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:34,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:34,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:34,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:34,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:34,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:34,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:34,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:34,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:34,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:34,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:34,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558699146] [2020-10-12 16:16:34,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:34,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 16:16:34,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335611839] [2020-10-12 16:16:34,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 16:16:34,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:34,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 16:16:34,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:16:34,876 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 46 states. [2020-10-12 16:16:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:34,949 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-12 16:16:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 16:16:34,950 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-12 16:16:34,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:34,951 INFO L225 Difference]: With dead ends: 62 [2020-10-12 16:16:34,951 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 16:16:34,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:16:34,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 16:16:34,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-12 16:16:34,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 16:16:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-12 16:16:34,954 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2020-10-12 16:16:34,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:34,955 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-12 16:16:34,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 16:16:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-12 16:16:34,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 16:16:34,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:34,955 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:34,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:16:34,956 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:34,956 INFO L82 PathProgramCache]: Analyzing trace with hash 530488438, now seen corresponding path program 44 times [2020-10-12 16:16:34,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:34,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212105689] [2020-10-12 16:16:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:34,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:34,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:35,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:35,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 16:16:35,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:35,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-12 16:16:35,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:35,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 16:16:35,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:35,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:16:35,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:37,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:37,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:37,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:37,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:37,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:37,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:37,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:37,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:37,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:37,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:37,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:37,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212105689] [2020-10-12 16:16:37,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:37,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 16:16:37,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819689865] [2020-10-12 16:16:37,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 16:16:37,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:37,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 16:16:37,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:16:37,283 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 47 states. [2020-10-12 16:16:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:37,361 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-12 16:16:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 16:16:37,362 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2020-10-12 16:16:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:37,363 INFO L225 Difference]: With dead ends: 63 [2020-10-12 16:16:37,363 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 16:16:37,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:16:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 16:16:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-12 16:16:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 16:16:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-12 16:16:37,367 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2020-10-12 16:16:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:37,367 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-12 16:16:37,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 16:16:37,367 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-12 16:16:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 16:16:37,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:37,368 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:37,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:16:37,368 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:37,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:37,369 INFO L82 PathProgramCache]: Analyzing trace with hash -699189846, now seen corresponding path program 45 times [2020-10-12 16:16:37,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:37,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127441473] [2020-10-12 16:16:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:37,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:37,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:38,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:38,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 16:16:38,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:38,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1061 [2020-10-12 16:16:38,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:38,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:16:38,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:38,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 16:16:38,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:39,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:39,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:39,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:39,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:39,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:39,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:39,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:39,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:39,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:39,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:39,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:39,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127441473] [2020-10-12 16:16:39,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:39,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:16:39,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077684058] [2020-10-12 16:16:39,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:16:39,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:39,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:16:39,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:16:39,901 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 48 states. [2020-10-12 16:16:39,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:39,976 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-12 16:16:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:16:39,982 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-10-12 16:16:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:39,983 INFO L225 Difference]: With dead ends: 64 [2020-10-12 16:16:39,983 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 16:16:39,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:16:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 16:16:39,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-12 16:16:39,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 16:16:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-12 16:16:39,987 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2020-10-12 16:16:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:39,987 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-12 16:16:39,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:16:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-12 16:16:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 16:16:39,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:39,988 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:39,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:16:39,989 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:39,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:39,989 INFO L82 PathProgramCache]: Analyzing trace with hash -164510986, now seen corresponding path program 46 times [2020-10-12 16:16:39,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:39,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36675106] [2020-10-12 16:16:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:39,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:40,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:41,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:41,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 16:16:41,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:41,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1151 [2020-10-12 16:16:41,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:41,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 16:16:41,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:41,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 16:16:41,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:42,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:42,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:42,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:42,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:42,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:42,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:42,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:42,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:42,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:42,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:42,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:42,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36675106] [2020-10-12 16:16:42,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:42,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:16:42,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062595151] [2020-10-12 16:16:42,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:16:42,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:42,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:16:42,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:16:42,544 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 49 states. [2020-10-12 16:16:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:42,623 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-12 16:16:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:16:42,624 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 57 [2020-10-12 16:16:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:42,624 INFO L225 Difference]: With dead ends: 65 [2020-10-12 16:16:42,624 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 16:16:42,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:16:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 16:16:42,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-12 16:16:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 16:16:42,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-12 16:16:42,628 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2020-10-12 16:16:42,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:42,628 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-12 16:16:42,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:16:42,628 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-12 16:16:42,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 16:16:42,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:42,629 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:42,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:16:42,629 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:42,630 INFO L82 PathProgramCache]: Analyzing trace with hash -769335510, now seen corresponding path program 47 times [2020-10-12 16:16:42,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:42,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372878284] [2020-10-12 16:16:42,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:42,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:42,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:43,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:43,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 16:16:43,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:43,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1179 [2020-10-12 16:16:43,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:43,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 16:16:43,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:43,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 16:16:43,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:45,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:45,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:45,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:45,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:45,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:45,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:45,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:45,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:45,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:45,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:45,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:45,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372878284] [2020-10-12 16:16:45,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:45,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 16:16:45,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743236660] [2020-10-12 16:16:45,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 16:16:45,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:45,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 16:16:45,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:16:45,295 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 50 states. [2020-10-12 16:16:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:45,372 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-12 16:16:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 16:16:45,378 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-10-12 16:16:45,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:45,379 INFO L225 Difference]: With dead ends: 66 [2020-10-12 16:16:45,379 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 16:16:45,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:16:45,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 16:16:45,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-12 16:16:45,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 16:16:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-12 16:16:45,383 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2020-10-12 16:16:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:45,385 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-12 16:16:45,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 16:16:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-12 16:16:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 16:16:45,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:45,385 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:45,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:16:45,386 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:45,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:45,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1955940726, now seen corresponding path program 48 times [2020-10-12 16:16:45,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:45,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562289859] [2020-10-12 16:16:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:45,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:45,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 16:16:46,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:46,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1303 [2020-10-12 16:16:46,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 16:16:46,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:46,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 16:16:46,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:48,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:48,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:48,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:48,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:48,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:48,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:48,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:48,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:48,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:48,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:48,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562289859] [2020-10-12 16:16:48,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:48,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 16:16:48,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508303675] [2020-10-12 16:16:48,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 16:16:48,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:48,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 16:16:48,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:16:48,264 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 51 states. [2020-10-12 16:16:48,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:48,367 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-12 16:16:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 16:16:48,368 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 59 [2020-10-12 16:16:48,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:48,368 INFO L225 Difference]: With dead ends: 67 [2020-10-12 16:16:48,368 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 16:16:48,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:16:48,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 16:16:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-12 16:16:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 16:16:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-12 16:16:48,372 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2020-10-12 16:16:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:48,372 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-12 16:16:48,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 16:16:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-12 16:16:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 16:16:48,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:48,373 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:48,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:16:48,373 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:48,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:48,374 INFO L82 PathProgramCache]: Analyzing trace with hash 540158122, now seen corresponding path program 49 times [2020-10-12 16:16:48,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:48,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406050387] [2020-10-12 16:16:48,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:48,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:49,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:49,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 16:16:49,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:49,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1303 [2020-10-12 16:16:49,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:49,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 16:16:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 16:16:49,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:51,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:51,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:51,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:51,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:51,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:51,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:51,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:51,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:51,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406050387] [2020-10-12 16:16:51,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:51,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 16:16:51,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863337879] [2020-10-12 16:16:51,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 16:16:51,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:51,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 16:16:51,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:16:51,376 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 52 states. [2020-10-12 16:16:51,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:51,461 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-12 16:16:51,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 16:16:51,461 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 60 [2020-10-12 16:16:51,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:51,462 INFO L225 Difference]: With dead ends: 68 [2020-10-12 16:16:51,462 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 16:16:51,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:16:51,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 16:16:51,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-12 16:16:51,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 16:16:51,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-12 16:16:51,465 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2020-10-12 16:16:51,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:51,465 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-12 16:16:51,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 16:16:51,465 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-12 16:16:51,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 16:16:51,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:51,466 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:51,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:16:51,466 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:51,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:51,467 INFO L82 PathProgramCache]: Analyzing trace with hash -399429642, now seen corresponding path program 50 times [2020-10-12 16:16:51,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:51,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397393113] [2020-10-12 16:16:51,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:51,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:51,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:52,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:52,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 16:16:52,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:52,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1332 [2020-10-12 16:16:52,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 16:16:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 16:16:52,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:54,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:54,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:54,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:54,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:54,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:54,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:54,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:54,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:54,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:54,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:54,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:54,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397393113] [2020-10-12 16:16:54,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:54,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 16:16:54,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420253039] [2020-10-12 16:16:54,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 16:16:54,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:54,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 16:16:54,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:16:54,491 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 53 states. [2020-10-12 16:16:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:54,611 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-12 16:16:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 16:16:54,615 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 61 [2020-10-12 16:16:54,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:54,615 INFO L225 Difference]: With dead ends: 69 [2020-10-12 16:16:54,615 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 16:16:54,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:16:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 16:16:54,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-12 16:16:54,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 16:16:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-12 16:16:54,622 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2020-10-12 16:16:54,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:54,622 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-12 16:16:54,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 16:16:54,623 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-12 16:16:54,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 16:16:54,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:54,623 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:54,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:16:54,624 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:54,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:54,626 INFO L82 PathProgramCache]: Analyzing trace with hash 538120746, now seen corresponding path program 51 times [2020-10-12 16:16:54,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:54,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929753169] [2020-10-12 16:16:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:54,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:54,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:55,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:55,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 16:16:55,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:55,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1067 [2020-10-12 16:16:55,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:55,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 16:16:55,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:55,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 16:16:55,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:57,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:57,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:57,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:57,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:57,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:57,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:57,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:57,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:57,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:57,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:57,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:57,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929753169] [2020-10-12 16:16:57,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:57,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 16:16:57,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567713089] [2020-10-12 16:16:57,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 16:16:57,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:57,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 16:16:57,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:16:57,498 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 54 states. [2020-10-12 16:16:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:57,606 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-12 16:16:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 16:16:57,606 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 62 [2020-10-12 16:16:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:57,607 INFO L225 Difference]: With dead ends: 70 [2020-10-12 16:16:57,607 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 16:16:57,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:16:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 16:16:57,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-12 16:16:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 16:16:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-12 16:16:57,611 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2020-10-12 16:16:57,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:57,611 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-12 16:16:57,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 16:16:57,611 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-12 16:16:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 16:16:57,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:57,612 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:57,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:16:57,612 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:57,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:57,613 INFO L82 PathProgramCache]: Analyzing trace with hash -462588298, now seen corresponding path program 52 times [2020-10-12 16:16:57,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:57,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917613375] [2020-10-12 16:16:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:57,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:57,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:58,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:58,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 16:16:58,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:58,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1151 [2020-10-12 16:16:58,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:58,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-12 16:16:58,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:58,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 16:16:58,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:00,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:00,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:00,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:00,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:00,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:00,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:00,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:00,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:00,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:00,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:00,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:17:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:00,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917613375] [2020-10-12 16:17:00,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:00,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-12 16:17:00,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344189444] [2020-10-12 16:17:00,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-12 16:17:00,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:00,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-12 16:17:00,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:17:00,693 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 55 states. [2020-10-12 16:17:00,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:00,808 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-12 16:17:00,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 16:17:00,809 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 63 [2020-10-12 16:17:00,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:00,810 INFO L225 Difference]: With dead ends: 71 [2020-10-12 16:17:00,810 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 16:17:00,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:17:00,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 16:17:00,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-12 16:17:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 16:17:00,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-12 16:17:00,817 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2020-10-12 16:17:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:00,817 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-12 16:17:00,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-12 16:17:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-12 16:17:00,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 16:17:00,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:00,823 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:00,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:17:00,824 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:00,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1419797590, now seen corresponding path program 53 times [2020-10-12 16:17:00,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:00,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475227129] [2020-10-12 16:17:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:00,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:00,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:02,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:02,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 16:17:02,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:02,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1254 [2020-10-12 16:17:02,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:02,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 16:17:02,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:02,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 16:17:02,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:04,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:04,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:04,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:04,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:04,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:04,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:04,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:04,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:04,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:04,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:04,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:04,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475227129] [2020-10-12 16:17:04,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:04,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-12 16:17:04,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803840902] [2020-10-12 16:17:04,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-12 16:17:04,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:04,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-12 16:17:04,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:17:04,039 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 56 states. [2020-10-12 16:17:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:04,158 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-12 16:17:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 16:17:04,161 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 64 [2020-10-12 16:17:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:04,162 INFO L225 Difference]: With dead ends: 72 [2020-10-12 16:17:04,162 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 16:17:04,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:17:04,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 16:17:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-12 16:17:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 16:17:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-12 16:17:04,166 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2020-10-12 16:17:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:04,166 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-12 16:17:04,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-12 16:17:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-12 16:17:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 16:17:04,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:04,167 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:04,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:17:04,167 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:04,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:04,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1028514570, now seen corresponding path program 54 times [2020-10-12 16:17:04,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:04,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928516272] [2020-10-12 16:17:04,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:04,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:04,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:05,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:05,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 16:17:05,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:05,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1241 [2020-10-12 16:17:05,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 16:17:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 16:17:05,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:07,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:07,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:07,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:07,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:07,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:07,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:07,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:07,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:07,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:07,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:07,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:07,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928516272] [2020-10-12 16:17:07,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:07,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 16:17:07,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93499102] [2020-10-12 16:17:07,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 16:17:07,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:07,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 16:17:07,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:17:07,452 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 57 states. [2020-10-12 16:17:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:07,565 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-12 16:17:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 16:17:07,566 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 65 [2020-10-12 16:17:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:07,567 INFO L225 Difference]: With dead ends: 73 [2020-10-12 16:17:07,567 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 16:17:07,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:17:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 16:17:07,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-12 16:17:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 16:17:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-12 16:17:07,573 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2020-10-12 16:17:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:07,574 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-12 16:17:07,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 16:17:07,574 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-12 16:17:07,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 16:17:07,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:07,577 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:07,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:17:07,578 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:07,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:07,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1783642838, now seen corresponding path program 55 times [2020-10-12 16:17:07,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:07,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126286353] [2020-10-12 16:17:07,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:07,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:07,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:08,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:08,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 16:17:08,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:08,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1397 [2020-10-12 16:17:08,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:08,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-12 16:17:08,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:08,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 16:17:08,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:11,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:11,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:11,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:11,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:11,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:11,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:11,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:11,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:11,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:11,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:11,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:11,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126286353] [2020-10-12 16:17:11,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:11,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-12 16:17:11,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683191029] [2020-10-12 16:17:11,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-12 16:17:11,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:11,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-12 16:17:11,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:17:11,124 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 58 states. [2020-10-12 16:17:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:11,259 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-12 16:17:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 16:17:11,262 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 66 [2020-10-12 16:17:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:11,263 INFO L225 Difference]: With dead ends: 74 [2020-10-12 16:17:11,263 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 16:17:11,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:17:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 16:17:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-12 16:17:11,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 16:17:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-12 16:17:11,266 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2020-10-12 16:17:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:11,267 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-12 16:17:11,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-12 16:17:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-12 16:17:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 16:17:11,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:11,268 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:11,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:17:11,268 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:11,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:11,268 INFO L82 PathProgramCache]: Analyzing trace with hash 577184630, now seen corresponding path program 56 times [2020-10-12 16:17:11,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:11,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573848797] [2020-10-12 16:17:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:11,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:11,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:12,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:12,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 16:17:12,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:12,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1311 [2020-10-12 16:17:12,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:12,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-12 16:17:12,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:12,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 16:17:12,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:14,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:14,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:14,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:14,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:14,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:14,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:14,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:14,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:14,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:14,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:14,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:14,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573848797] [2020-10-12 16:17:14,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:14,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-12 16:17:14,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134336442] [2020-10-12 16:17:14,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-12 16:17:14,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:14,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-12 16:17:14,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:17:14,897 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 59 states. [2020-10-12 16:17:15,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:15,038 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-10-12 16:17:15,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-12 16:17:15,039 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 67 [2020-10-12 16:17:15,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:15,040 INFO L225 Difference]: With dead ends: 75 [2020-10-12 16:17:15,040 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 16:17:15,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:17:15,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 16:17:15,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-12 16:17:15,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 16:17:15,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-12 16:17:15,043 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2020-10-12 16:17:15,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:15,043 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-12 16:17:15,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-12 16:17:15,043 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-12 16:17:15,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 16:17:15,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:15,044 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:15,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 16:17:15,044 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:15,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:15,044 INFO L82 PathProgramCache]: Analyzing trace with hash 748392106, now seen corresponding path program 57 times [2020-10-12 16:17:15,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:15,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50625680] [2020-10-12 16:17:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:15,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:15,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:16,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:16,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 16:17:16,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:16,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1482 [2020-10-12 16:17:16,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:16,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-12 16:17:16,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:16,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 16:17:16,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:18,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:18,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:18,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:18,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:18,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:18,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:18,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:18,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:18,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:18,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:18,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:18,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50625680] [2020-10-12 16:17:18,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:18,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-12 16:17:18,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845940129] [2020-10-12 16:17:18,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-12 16:17:18,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:18,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-12 16:17:18,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:17:18,995 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 60 states. [2020-10-12 16:17:19,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:19,140 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-12 16:17:19,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 16:17:19,141 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 68 [2020-10-12 16:17:19,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:19,142 INFO L225 Difference]: With dead ends: 76 [2020-10-12 16:17:19,142 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 16:17:19,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:17:19,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 16:17:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-12 16:17:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 16:17:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-12 16:17:19,144 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2020-10-12 16:17:19,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:19,144 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-12 16:17:19,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-12 16:17:19,145 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-12 16:17:19,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 16:17:19,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:19,145 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:19,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 16:17:19,146 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:19,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:19,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1760856566, now seen corresponding path program 58 times [2020-10-12 16:17:19,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:19,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707375760] [2020-10-12 16:17:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:19,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:19,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:20,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:20,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 16:17:20,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:20,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1515 [2020-10-12 16:17:20,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:20,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-12 16:17:20,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:20,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 16:17:20,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:23,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:23,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:23,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:23,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:23,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:23,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:23,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:23,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:23,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:23,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:23,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:23,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707375760] [2020-10-12 16:17:23,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:23,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-12 16:17:23,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413328837] [2020-10-12 16:17:23,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-12 16:17:23,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:23,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-12 16:17:23,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:17:23,200 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 61 states. [2020-10-12 16:17:23,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:23,325 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-12 16:17:23,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 16:17:23,326 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 69 [2020-10-12 16:17:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:23,327 INFO L225 Difference]: With dead ends: 77 [2020-10-12 16:17:23,327 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 16:17:23,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:17:23,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 16:17:23,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-12 16:17:23,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 16:17:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-12 16:17:23,331 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2020-10-12 16:17:23,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:23,331 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-12 16:17:23,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-12 16:17:23,331 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-12 16:17:23,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 16:17:23,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:23,332 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:23,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 16:17:23,332 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:23,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:23,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1212483542, now seen corresponding path program 59 times [2020-10-12 16:17:23,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:23,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240132050] [2020-10-12 16:17:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:23,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:23,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:24,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:24,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 16:17:24,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:24,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1609 [2020-10-12 16:17:24,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:24,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-12 16:17:24,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:24,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 16:17:24,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:27,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:27,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:27,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:27,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:27,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:27,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:27,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:27,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:27,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:27,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:27,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:27,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240132050] [2020-10-12 16:17:27,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:27,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-12 16:17:27,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959775573] [2020-10-12 16:17:27,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-12 16:17:27,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:27,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-12 16:17:27,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:17:27,644 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 62 states. [2020-10-12 16:17:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:27,805 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-12 16:17:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 16:17:27,805 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 70 [2020-10-12 16:17:27,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:27,806 INFO L225 Difference]: With dead ends: 78 [2020-10-12 16:17:27,806 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 16:17:27,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:17:27,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 16:17:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-12 16:17:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 16:17:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-12 16:17:27,809 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2020-10-12 16:17:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:27,810 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-12 16:17:27,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-12 16:17:27,810 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-12 16:17:27,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 16:17:27,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:27,810 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:27,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 16:17:27,811 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:27,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:27,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1103253622, now seen corresponding path program 60 times [2020-10-12 16:17:27,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:27,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613117257] [2020-10-12 16:17:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:27,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:27,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:29,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:29,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 16:17:29,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:29,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1771 [2020-10-12 16:17:29,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:29,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-12 16:17:29,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:29,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 16:17:29,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:32,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:32,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:32,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:32,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:32,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:32,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:32,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:32,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:32,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613117257] [2020-10-12 16:17:32,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:32,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-12 16:17:32,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472706132] [2020-10-12 16:17:32,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-12 16:17:32,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:32,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-12 16:17:32,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:17:32,388 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 63 states. [2020-10-12 16:17:32,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:32,565 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-12 16:17:32,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 16:17:32,566 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 71 [2020-10-12 16:17:32,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:32,566 INFO L225 Difference]: With dead ends: 79 [2020-10-12 16:17:32,567 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 16:17:32,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:17:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 16:17:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-12 16:17:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 16:17:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-12 16:17:32,570 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2020-10-12 16:17:32,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:32,574 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-12 16:17:32,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-12 16:17:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-12 16:17:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 16:17:32,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:32,575 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:32,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 16:17:32,575 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:32,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:32,576 INFO L82 PathProgramCache]: Analyzing trace with hash -123338326, now seen corresponding path program 61 times [2020-10-12 16:17:32,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:32,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90271221] [2020-10-12 16:17:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:32,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:32,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:34,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:34,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 16:17:34,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:34,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1746 [2020-10-12 16:17:34,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-12 16:17:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 16:17:34,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:37,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:37,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:37,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:37,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:37,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:37,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:37,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:37,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:37,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:37,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:37,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:37,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90271221] [2020-10-12 16:17:37,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:37,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-12 16:17:37,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280867537] [2020-10-12 16:17:37,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-12 16:17:37,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:37,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-12 16:17:37,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 16:17:37,199 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 64 states. [2020-10-12 16:17:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:37,361 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-12 16:17:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-12 16:17:37,362 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 72 [2020-10-12 16:17:37,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:37,363 INFO L225 Difference]: With dead ends: 80 [2020-10-12 16:17:37,363 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 16:17:37,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 16:17:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 16:17:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-12 16:17:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 16:17:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-12 16:17:37,366 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2020-10-12 16:17:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:37,367 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-12 16:17:37,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-12 16:17:37,367 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-12 16:17:37,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 16:17:37,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:37,367 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:37,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 16:17:37,367 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:37,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:37,368 INFO L82 PathProgramCache]: Analyzing trace with hash 507016950, now seen corresponding path program 62 times [2020-10-12 16:17:37,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:37,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819746478] [2020-10-12 16:17:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:37,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:37,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:39,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:39,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 16:17:39,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:39,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1782 [2020-10-12 16:17:39,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-12 16:17:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:39,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 16:17:39,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:42,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:42,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:42,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:42,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:42,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:42,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:42,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:42,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:42,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:42,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:42,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:42,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819746478] [2020-10-12 16:17:42,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:42,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-12 16:17:42,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740028891] [2020-10-12 16:17:42,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-12 16:17:42,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:42,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-12 16:17:42,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:17:42,112 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 65 states. [2020-10-12 16:17:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:42,272 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-12 16:17:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-12 16:17:42,273 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 73 [2020-10-12 16:17:42,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:42,274 INFO L225 Difference]: With dead ends: 81 [2020-10-12 16:17:42,274 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 16:17:42,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:17:42,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 16:17:42,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-12 16:17:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 16:17:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-12 16:17:42,278 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2020-10-12 16:17:42,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:42,278 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-12 16:17:42,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-12 16:17:42,278 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-12 16:17:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 16:17:42,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:42,279 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:42,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 16:17:42,279 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:42,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:42,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1426805974, now seen corresponding path program 63 times [2020-10-12 16:17:42,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:42,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447306469] [2020-10-12 16:17:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:42,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:42,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:44,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:44,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 16:17:44,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:44,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1826 [2020-10-12 16:17:44,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:44,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-12 16:17:44,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:44,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 16:17:44,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:47,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:47,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:47,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:47,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:47,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:47,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:47,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:47,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:47,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:47,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:47,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:47,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447306469] [2020-10-12 16:17:47,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:47,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-12 16:17:47,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597447026] [2020-10-12 16:17:47,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-12 16:17:47,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:47,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-12 16:17:47,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:17:47,170 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 66 states. [2020-10-12 16:17:47,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:47,331 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-12 16:17:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-12 16:17:47,335 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 74 [2020-10-12 16:17:47,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:47,336 INFO L225 Difference]: With dead ends: 82 [2020-10-12 16:17:47,336 INFO L226 Difference]: Without dead ends: 77 [2020-10-12 16:17:47,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:17:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-12 16:17:47,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-12 16:17:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 16:17:47,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-12 16:17:47,339 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2020-10-12 16:17:47,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:47,339 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-12 16:17:47,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-12 16:17:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-12 16:17:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 16:17:47,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:47,340 INFO L422 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:47,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 16:17:47,341 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:47,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:47,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1245774474, now seen corresponding path program 64 times [2020-10-12 16:17:47,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:47,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378976559] [2020-10-12 16:17:47,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:47,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:47,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:49,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:49,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 16:17:49,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:49,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2002 [2020-10-12 16:17:49,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:49,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-12 16:17:49,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:49,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 16:17:49,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:52,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:52,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:52,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:52,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:52,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:52,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:52,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:52,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:52,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:52,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:52,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:52,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378976559] [2020-10-12 16:17:52,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:52,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-12 16:17:52,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631635538] [2020-10-12 16:17:52,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-12 16:17:52,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:52,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-12 16:17:52,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:17:52,434 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 67 states. [2020-10-12 16:17:52,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:52,568 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-12 16:17:52,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-12 16:17:52,570 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 75 [2020-10-12 16:17:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:52,571 INFO L225 Difference]: With dead ends: 83 [2020-10-12 16:17:52,571 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 16:17:52,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:17:52,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 16:17:52,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-12 16:17:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 16:17:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-12 16:17:52,574 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2020-10-12 16:17:52,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:52,574 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-12 16:17:52,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-12 16:17:52,574 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-12 16:17:52,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 16:17:52,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:52,575 INFO L422 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:52,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-12 16:17:52,575 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:52,575 INFO L82 PathProgramCache]: Analyzing trace with hash 71234730, now seen corresponding path program 65 times [2020-10-12 16:17:52,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:52,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268522391] [2020-10-12 16:17:52,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:52,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:53,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:54,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:54,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 16:17:54,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:54,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1950 [2020-10-12 16:17:54,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:54,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-12 16:17:54,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:54,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 16:17:54,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:57,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:57,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:57,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:57,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:57,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:57,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:57,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:57,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:57,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:57,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:57,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:57,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268522391] [2020-10-12 16:17:57,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:57,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-12 16:17:57,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146683629] [2020-10-12 16:17:57,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-12 16:17:57,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:57,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-12 16:17:57,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 16:17:57,790 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 68 states. [2020-10-12 16:17:57,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:57,923 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-12 16:17:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-12 16:17:57,924 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 76 [2020-10-12 16:17:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:57,925 INFO L225 Difference]: With dead ends: 84 [2020-10-12 16:17:57,925 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 16:17:57,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 16:17:57,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 16:17:57,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-12 16:17:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 16:17:57,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-12 16:17:57,928 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2020-10-12 16:17:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:57,928 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-12 16:17:57,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-12 16:17:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-12 16:17:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 16:17:57,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:57,929 INFO L422 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:57,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-12 16:17:57,929 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:57,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:57,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2051152906, now seen corresponding path program 66 times [2020-10-12 16:17:57,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:57,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561429277] [2020-10-12 16:17:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:57,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:58,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:00,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:00,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 16:18:00,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:00,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2209 [2020-10-12 16:18:00,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:00,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-12 16:18:00,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:00,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 16:18:00,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:18:03,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:03,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:03,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:03,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:03,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:03,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:03,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:03,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:03,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:03,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:03,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:03,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561429277] [2020-10-12 16:18:03,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:03,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-12 16:18:03,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224267661] [2020-10-12 16:18:03,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-12 16:18:03,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:03,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-12 16:18:03,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 16:18:03,568 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 69 states. [2020-10-12 16:18:03,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:03,697 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-12 16:18:03,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-12 16:18:03,698 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 77 [2020-10-12 16:18:03,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:03,699 INFO L225 Difference]: With dead ends: 85 [2020-10-12 16:18:03,699 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 16:18:03,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 16:18:03,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 16:18:03,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-12 16:18:03,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 16:18:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-12 16:18:03,703 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2020-10-12 16:18:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:03,703 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-12 16:18:03,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-12 16:18:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-12 16:18:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 16:18:03,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:03,704 INFO L422 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:03,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-12 16:18:03,704 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:03,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:03,705 INFO L82 PathProgramCache]: Analyzing trace with hash 874307114, now seen corresponding path program 67 times [2020-10-12 16:18:03,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:03,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563288463] [2020-10-12 16:18:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:03,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:03,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:05,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:05,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 16:18:05,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:05,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2145 [2020-10-12 16:18:05,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:05,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-12 16:18:05,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:05,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 16:18:05,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:09,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:09,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:09,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:09,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:09,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:09,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:09,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:09,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:09,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:09,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:09,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:09,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563288463] [2020-10-12 16:18:09,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:09,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-12 16:18:09,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780031820] [2020-10-12 16:18:09,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-12 16:18:09,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:09,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-12 16:18:09,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 16:18:09,348 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 70 states. [2020-10-12 16:18:09,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:09,494 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-12 16:18:09,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-12 16:18:09,496 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 78 [2020-10-12 16:18:09,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:09,497 INFO L225 Difference]: With dead ends: 86 [2020-10-12 16:18:09,497 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 16:18:09,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 16:18:09,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 16:18:09,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-12 16:18:09,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 16:18:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-12 16:18:09,500 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2020-10-12 16:18:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:09,500 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-12 16:18:09,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-12 16:18:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-12 16:18:09,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 16:18:09,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:09,501 INFO L422 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:09,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-12 16:18:09,502 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:09,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:09,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1369254518, now seen corresponding path program 68 times [2020-10-12 16:18:09,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:09,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383461728] [2020-10-12 16:18:09,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:09,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:09,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:11,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:11,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 16:18:11,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:11,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2294 [2020-10-12 16:18:11,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:11,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-12 16:18:11,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:11,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 16:18:11,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:15,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:15,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:15,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:15,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:15,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:15,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:15,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:15,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:15,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:15,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:15,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:15,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383461728] [2020-10-12 16:18:15,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:15,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-12 16:18:15,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427305741] [2020-10-12 16:18:15,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-12 16:18:15,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:15,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-12 16:18:15,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 16:18:15,431 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 71 states. [2020-10-12 16:18:15,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:15,563 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-10-12 16:18:15,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-12 16:18:15,564 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 79 [2020-10-12 16:18:15,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:15,565 INFO L225 Difference]: With dead ends: 87 [2020-10-12 16:18:15,565 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 16:18:15,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 16:18:15,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 16:18:15,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-12 16:18:15,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 16:18:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-12 16:18:15,568 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2020-10-12 16:18:15,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:15,568 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-12 16:18:15,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-12 16:18:15,569 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-12 16:18:15,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 16:18:15,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:15,569 INFO L422 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:15,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-12 16:18:15,569 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:15,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:15,570 INFO L82 PathProgramCache]: Analyzing trace with hash -467245142, now seen corresponding path program 69 times [2020-10-12 16:18:15,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:15,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274750948] [2020-10-12 16:18:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:15,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:15,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:18,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:18,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 16:18:18,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:18,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2613 [2020-10-12 16:18:18,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:18,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-12 16:18:18,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:18,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 16:18:18,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:21,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:21,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:21,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:21,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:21,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:21,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:21,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:21,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:21,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:21,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:21,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:21,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274750948] [2020-10-12 16:18:21,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:21,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-12 16:18:21,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348750932] [2020-10-12 16:18:21,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-12 16:18:21,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:21,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-12 16:18:21,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 16:18:21,967 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 72 states. [2020-10-12 16:18:22,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:22,106 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-12 16:18:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-12 16:18:22,107 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 80 [2020-10-12 16:18:22,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:22,108 INFO L225 Difference]: With dead ends: 88 [2020-10-12 16:18:22,108 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 16:18:22,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 16:18:22,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 16:18:22,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-12 16:18:22,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 16:18:22,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-12 16:18:22,111 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2020-10-12 16:18:22,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:22,111 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-12 16:18:22,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-12 16:18:22,111 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-12 16:18:22,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 16:18:22,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:22,112 INFO L422 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:22,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-12 16:18:22,112 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:22,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1564159754, now seen corresponding path program 70 times [2020-10-12 16:18:22,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:22,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403380303] [2020-10-12 16:18:22,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:22,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:22,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:24,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:24,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 16:18:24,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:24,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2447 [2020-10-12 16:18:24,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:24,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-12 16:18:24,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:24,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 16:18:24,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:28,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:28,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:28,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:28,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:28,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:28,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:28,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:28,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:28,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:28,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:28,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:28,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403380303] [2020-10-12 16:18:28,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:28,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-12 16:18:28,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330886154] [2020-10-12 16:18:28,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-12 16:18:28,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:28,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-12 16:18:28,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 16:18:28,578 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 73 states. [2020-10-12 16:18:28,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:28,748 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-12 16:18:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-12 16:18:28,749 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 81 [2020-10-12 16:18:28,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:28,750 INFO L225 Difference]: With dead ends: 89 [2020-10-12 16:18:28,750 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 16:18:28,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 16:18:28,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 16:18:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-12 16:18:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 16:18:28,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-12 16:18:28,755 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2020-10-12 16:18:28,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:28,756 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-12 16:18:28,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-12 16:18:28,756 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-12 16:18:28,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 16:18:28,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:28,757 INFO L422 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:28,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-12 16:18:28,757 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:28,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:28,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1208774358, now seen corresponding path program 71 times [2020-10-12 16:18:28,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:28,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919912898] [2020-10-12 16:18:28,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:28,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:29,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:31,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:31,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 16:18:31,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:31,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3010 [2020-10-12 16:18:31,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:31,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-12 16:18:31,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:31,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 16:18:31,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:35,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:35,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:35,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:35,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:35,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:35,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:35,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:35,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:35,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:35,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:35,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:35,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919912898] [2020-10-12 16:18:35,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:35,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-12 16:18:35,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644099177] [2020-10-12 16:18:35,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-12 16:18:35,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:35,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-12 16:18:35,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 16:18:35,869 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 74 states. [2020-10-12 16:18:36,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:36,040 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-12 16:18:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-12 16:18:36,041 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 82 [2020-10-12 16:18:36,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:36,042 INFO L225 Difference]: With dead ends: 90 [2020-10-12 16:18:36,042 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 16:18:36,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 16:18:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 16:18:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-12 16:18:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 16:18:36,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-12 16:18:36,046 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2020-10-12 16:18:36,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:36,046 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-12 16:18:36,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-12 16:18:36,046 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-12 16:18:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 16:18:36,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:36,047 INFO L422 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:36,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-12 16:18:36,047 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:36,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:36,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1218238326, now seen corresponding path program 72 times [2020-10-12 16:18:36,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:36,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388577124] [2020-10-12 16:18:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:36,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:36,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:38,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:38,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 16:18:38,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:38,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2621 [2020-10-12 16:18:38,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:38,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-12 16:18:38,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:38,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 16:18:38,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:43,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:43,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:43,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:43,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:43,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:43,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:43,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:43,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:43,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:43,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:43,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:43,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388577124] [2020-10-12 16:18:43,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:43,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-12 16:18:43,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794935248] [2020-10-12 16:18:43,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-12 16:18:43,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:43,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-12 16:18:43,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:18:43,072 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 75 states. [2020-10-12 16:18:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:43,268 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-10-12 16:18:43,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-12 16:18:43,270 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 83 [2020-10-12 16:18:43,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:43,270 INFO L225 Difference]: With dead ends: 91 [2020-10-12 16:18:43,270 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 16:18:43,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:18:43,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 16:18:43,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-12 16:18:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 16:18:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-12 16:18:43,275 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2020-10-12 16:18:43,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:43,275 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-12 16:18:43,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-12 16:18:43,275 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-12 16:18:43,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 16:18:43,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:43,276 INFO L422 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:43,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-12 16:18:43,276 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:43,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:43,277 INFO L82 PathProgramCache]: Analyzing trace with hash -853779798, now seen corresponding path program 73 times [2020-10-12 16:18:43,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:43,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750666965] [2020-10-12 16:18:43,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:43,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:43,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:46,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:46,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 16:18:46,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:46,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2807 [2020-10-12 16:18:46,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:46,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-12 16:18:46,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:46,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 16:18:46,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:50,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:50,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:50,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:50,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:50,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:50,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:50,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:50,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:50,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:50,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:50,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:50,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750666965] [2020-10-12 16:18:50,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:50,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-12 16:18:50,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386239518] [2020-10-12 16:18:50,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-12 16:18:50,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:50,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-12 16:18:50,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-12 16:18:50,685 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 76 states. [2020-10-12 16:18:50,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:50,882 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-12 16:18:50,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-12 16:18:50,884 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 84 [2020-10-12 16:18:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:50,884 INFO L225 Difference]: With dead ends: 92 [2020-10-12 16:18:50,885 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 16:18:50,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-12 16:18:50,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 16:18:50,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-12 16:18:50,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 16:18:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-12 16:18:50,888 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2020-10-12 16:18:50,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:50,888 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-12 16:18:50,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-12 16:18:50,888 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-12 16:18:50,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 16:18:50,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:50,889 INFO L422 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:50,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-12 16:18:50,889 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:50,890 INFO L82 PathProgramCache]: Analyzing trace with hash -661832202, now seen corresponding path program 74 times [2020-10-12 16:18:50,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:50,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888456413] [2020-10-12 16:18:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:50,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:51,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:53,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:53,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-12 16:18:53,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:53,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2791 [2020-10-12 16:18:53,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:53,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-12 16:18:53,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:53,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 16:18:53,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:58,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:58,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:58,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:58,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:58,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:58,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:58,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:58,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:58,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:58,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:58,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:58,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888456413] [2020-10-12 16:18:58,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:58,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-12 16:18:58,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265121778] [2020-10-12 16:18:58,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-12 16:18:58,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:58,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-12 16:18:58,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 16:18:58,406 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 77 states. [2020-10-12 16:18:58,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:58,625 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-12 16:18:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-12 16:18:58,626 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 85 [2020-10-12 16:18:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:58,626 INFO L225 Difference]: With dead ends: 93 [2020-10-12 16:18:58,626 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 16:18:58,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 16:18:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 16:18:58,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-12 16:18:58,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 16:18:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-12 16:18:58,630 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2020-10-12 16:18:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:58,631 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-12 16:18:58,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-12 16:18:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-12 16:18:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 16:18:58,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:58,632 INFO L422 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:58,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-12 16:18:58,632 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:58,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:58,633 INFO L82 PathProgramCache]: Analyzing trace with hash 993575978, now seen corresponding path program 75 times [2020-10-12 16:18:58,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:58,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145231773] [2020-10-12 16:18:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:58,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:58,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:01,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:01,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 16:19:01,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:01,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2832 [2020-10-12 16:19:01,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:01,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 77 [2020-10-12 16:19:01,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:01,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 16:19:01,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:06,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:06,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:06,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:06,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:06,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:06,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:06,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:06,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:06,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:06,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:06,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:06,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145231773] [2020-10-12 16:19:06,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:06,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-12 16:19:06,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122354769] [2020-10-12 16:19:06,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-12 16:19:06,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:06,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-12 16:19:06,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 16:19:06,364 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 78 states. [2020-10-12 16:19:06,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:06,605 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-12 16:19:06,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-12 16:19:06,606 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 86 [2020-10-12 16:19:06,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:06,607 INFO L225 Difference]: With dead ends: 94 [2020-10-12 16:19:06,607 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 16:19:06,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 16:19:06,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 16:19:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-12 16:19:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 16:19:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-12 16:19:06,610 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2020-10-12 16:19:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:06,610 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-12 16:19:06,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-12 16:19:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-12 16:19:06,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-12 16:19:06,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:06,611 INFO L422 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:06,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-12 16:19:06,612 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:06,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:06,612 INFO L82 PathProgramCache]: Analyzing trace with hash 771622006, now seen corresponding path program 76 times [2020-10-12 16:19:06,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:06,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964139092] [2020-10-12 16:19:06,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:06,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:06,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:09,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:09,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 16:19:09,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:09,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3155 [2020-10-12 16:19:09,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:09,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 78 [2020-10-12 16:19:09,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:09,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-12 16:19:09,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:14,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:14,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:14,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:14,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:14,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:14,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:14,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:14,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:14,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:14,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:14,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:14,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964139092] [2020-10-12 16:19:14,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:14,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-12 16:19:14,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123419644] [2020-10-12 16:19:14,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-12 16:19:14,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:14,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-12 16:19:14,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-12 16:19:14,757 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 79 states. [2020-10-12 16:19:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:14,975 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-10-12 16:19:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-12 16:19:14,976 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 87 [2020-10-12 16:19:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:14,977 INFO L225 Difference]: With dead ends: 95 [2020-10-12 16:19:14,977 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 16:19:14,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-12 16:19:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 16:19:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-12 16:19:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 16:19:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-12 16:19:14,982 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2020-10-12 16:19:14,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:14,982 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-12 16:19:14,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-12 16:19:14,983 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-12 16:19:14,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 16:19:14,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:14,983 INFO L422 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:14,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-12 16:19:14,984 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:14,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:14,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1813983830, now seen corresponding path program 77 times [2020-10-12 16:19:14,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:14,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393608322] [2020-10-12 16:19:14,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:14,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:15,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:18,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 16:19:18,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:18,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3166 [2020-10-12 16:19:18,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:18,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 79 [2020-10-12 16:19:18,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:18,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 16:19:18,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:23,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:23,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:23,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:23,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:23,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:23,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:23,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:23,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:23,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:23,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:23,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393608322] [2020-10-12 16:19:23,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:23,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-12 16:19:23,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726574542] [2020-10-12 16:19:23,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-12 16:19:23,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:23,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-12 16:19:23,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-12 16:19:23,267 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 80 states. [2020-10-12 16:19:23,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:23,444 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-10-12 16:19:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-12 16:19:23,446 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 88 [2020-10-12 16:19:23,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:23,447 INFO L225 Difference]: With dead ends: 96 [2020-10-12 16:19:23,447 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 16:19:23,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-12 16:19:23,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 16:19:23,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-12 16:19:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 16:19:23,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-12 16:19:23,452 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 88 [2020-10-12 16:19:23,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:23,452 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-12 16:19:23,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-12 16:19:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-12 16:19:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-12 16:19:23,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:23,453 INFO L422 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:23,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-12 16:19:23,453 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:23,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:23,453 INFO L82 PathProgramCache]: Analyzing trace with hash -363386122, now seen corresponding path program 78 times [2020-10-12 16:19:23,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:23,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083367603] [2020-10-12 16:19:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:23,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:26,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:26,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 16:19:26,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:26,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3111 [2020-10-12 16:19:26,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 80 [2020-10-12 16:19:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 16:19:26,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:32,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:32,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:32,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:32,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:32,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:32,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:32,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:32,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:32,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:32,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:32,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:32,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083367603] [2020-10-12 16:19:32,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:32,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-12 16:19:32,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381555653] [2020-10-12 16:19:32,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-12 16:19:32,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:32,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-12 16:19:32,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-12 16:19:32,191 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 81 states. [2020-10-12 16:19:32,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:32,390 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-10-12 16:19:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-12 16:19:32,391 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 89 [2020-10-12 16:19:32,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:32,392 INFO L225 Difference]: With dead ends: 97 [2020-10-12 16:19:32,392 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 16:19:32,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-12 16:19:32,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 16:19:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-12 16:19:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 16:19:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-12 16:19:32,396 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2020-10-12 16:19:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:32,396 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-12 16:19:32,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-12 16:19:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-12 16:19:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 16:19:32,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:32,397 INFO L422 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:32,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-12 16:19:32,397 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:32,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1655469866, now seen corresponding path program 79 times [2020-10-12 16:19:32,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:32,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798126757] [2020-10-12 16:19:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:32,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:32,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:35,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:35,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 16:19:35,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:35,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3243 [2020-10-12 16:19:35,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:35,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 81 [2020-10-12 16:19:35,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:35,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 16:19:35,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:41,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:41,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:41,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:41,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:41,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:41,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:41,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:41,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:41,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:41,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:41,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:41,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798126757] [2020-10-12 16:19:41,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:41,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-10-12 16:19:41,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089336041] [2020-10-12 16:19:41,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-12 16:19:41,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:41,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-12 16:19:41,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 16:19:41,243 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 82 states. [2020-10-12 16:19:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:41,478 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-12 16:19:41,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-12 16:19:41,479 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 90 [2020-10-12 16:19:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:41,480 INFO L225 Difference]: With dead ends: 98 [2020-10-12 16:19:41,480 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 16:19:41,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 16:19:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 16:19:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-12 16:19:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 16:19:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-12 16:19:41,484 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 90 [2020-10-12 16:19:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:41,484 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-12 16:19:41,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-12 16:19:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-12 16:19:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-12 16:19:41,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:41,485 INFO L422 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:41,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-12 16:19:41,486 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:41,486 INFO L82 PathProgramCache]: Analyzing trace with hash -184503946, now seen corresponding path program 80 times [2020-10-12 16:19:41,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:41,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097612947] [2020-10-12 16:19:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:41,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:41,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:44,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:44,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 16:19:44,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:44,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3488 [2020-10-12 16:19:44,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:44,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 82 [2020-10-12 16:19:44,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:44,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-12 16:19:44,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:50,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:50,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:50,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:50,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:50,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:50,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:50,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:50,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:50,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:50,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:50,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:50,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097612947] [2020-10-12 16:19:50,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:50,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-10-12 16:19:50,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649622268] [2020-10-12 16:19:50,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-10-12 16:19:50,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:50,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-10-12 16:19:50,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-12 16:19:50,948 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 83 states. [2020-10-12 16:19:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:51,198 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-12 16:19:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-12 16:19:51,199 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 91 [2020-10-12 16:19:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:51,200 INFO L225 Difference]: With dead ends: 99 [2020-10-12 16:19:51,200 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 16:19:51,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-12 16:19:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 16:19:51,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-12 16:19:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-12 16:19:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-12 16:19:51,204 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2020-10-12 16:19:51,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:51,204 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-12 16:19:51,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-10-12 16:19:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-12 16:19:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-12 16:19:51,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:51,205 INFO L422 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:51,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-12 16:19:51,206 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:51,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1389117270, now seen corresponding path program 81 times [2020-10-12 16:19:51,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:51,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945729435] [2020-10-12 16:19:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:51,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:51,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:54,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:54,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 16:19:54,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:54,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3635 [2020-10-12 16:19:54,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:54,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 83 [2020-10-12 16:19:54,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:54,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 16:19:54,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0