/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/conda.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:06:12,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:06:12,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:06:12,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:06:12,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:06:12,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:06:12,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:06:12,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:06:12,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:06:12,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:06:12,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:06:12,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:06:12,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:06:12,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:06:12,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:06:12,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:06:12,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:06:12,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:06:12,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:06:12,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:06:12,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:06:12,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:06:12,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:06:12,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:06:12,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:06:12,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:06:12,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:06:12,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:06:12,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:06:12,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:06:12,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:06:12,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:06:12,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:06:12,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:06:12,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:06:12,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:06:12,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:06:12,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:06:12,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:06:12,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:06:12,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:06:12,159 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 05:06:12,180 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:06:12,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:06:12,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:06:12,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:06:12,182 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:06:12,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:06:12,182 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:06:12,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:06:12,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:06:12,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:06:12,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:06:12,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:06:12,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:06:12,183 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:06:12,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:06:12,184 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:06:12,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:06:12,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:06:12,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:06:12,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:06:12,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:06:12,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:06:12,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:06:12,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:06:12,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:06:12,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:06:12,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:06:12,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:06:12,186 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:06:12,186 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:06:12,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:06:12,477 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:06:12,480 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:06:12,482 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:06:12,482 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:06:12,483 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/conda.c [2020-10-13 05:06:12,542 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea1356367/ddfe790933e4421f986a49fe0e75dd1d/FLAG43f2dd92c [2020-10-13 05:06:12,964 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:06:12,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/conda.c [2020-10-13 05:06:12,972 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea1356367/ddfe790933e4421f986a49fe0e75dd1d/FLAG43f2dd92c [2020-10-13 05:06:13,320 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea1356367/ddfe790933e4421f986a49fe0e75dd1d [2020-10-13 05:06:13,330 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:06:13,332 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:06:13,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:06:13,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:06:13,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:06:13,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:06:13" (1/1) ... [2020-10-13 05:06:13,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b33d7b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:13, skipping insertion in model container [2020-10-13 05:06:13,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:06:13" (1/1) ... [2020-10-13 05:06:13,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:06:13,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:06:13,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:06:13,604 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:06:13,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:06:13,641 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:06:13,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:13 WrapperNode [2020-10-13 05:06:13,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:06:13,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:06:13,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:06:13,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:06:13,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:13" (1/1) ... [2020-10-13 05:06:13,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:13" (1/1) ... [2020-10-13 05:06:13,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:13" (1/1) ... [2020-10-13 05:06:13,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:13" (1/1) ... [2020-10-13 05:06:13,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:13" (1/1) ... [2020-10-13 05:06:13,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:13" (1/1) ... [2020-10-13 05:06:13,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:13" (1/1) ... [2020-10-13 05:06:13,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:06:13,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:06:13,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:06:13,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:06:13,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:06:13,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:06:13,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:06:13,829 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:06:13,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:06:13,830 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:06:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:06:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:06:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:06:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:06:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:06:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:06:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:06:13,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:06:13,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:06:13,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:06:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:06:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:06:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:06:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:06:14,161 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:06:14,161 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 05:06:14,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:06:14 BoogieIcfgContainer [2020-10-13 05:06:14,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:06:14,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:06:14,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:06:14,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:06:14,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:06:13" (1/3) ... [2020-10-13 05:06:14,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e834c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:06:14, skipping insertion in model container [2020-10-13 05:06:14,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:06:13" (2/3) ... [2020-10-13 05:06:14,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e834c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:06:14, skipping insertion in model container [2020-10-13 05:06:14,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:06:14" (3/3) ... [2020-10-13 05:06:14,173 INFO L109 eAbstractionObserver]: Analyzing ICFG conda.c [2020-10-13 05:06:14,184 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:06:14,191 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:06:14,205 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:06:14,229 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:06:14,229 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:06:14,229 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:06:14,229 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:06:14,230 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:06:14,230 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:06:14,230 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:06:14,230 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:06:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-13 05:06:14,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 05:06:14,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:14,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:14,252 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:14,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:14,258 INFO L82 PathProgramCache]: Analyzing trace with hash -88121349, now seen corresponding path program 1 times [2020-10-13 05:06:14,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:14,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421554126] [2020-10-13 05:06:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:14,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:14,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:14,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:14,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:15,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:15,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:06:15,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:06:15,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 882 [2020-10-13 05:06:15,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:15,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:15,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 05:06:15,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:15,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:06:15,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:15,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:15,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:15,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:15,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:15,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:06:15,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:15,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:15,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:15,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:15,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:15,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:15,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:15,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:15,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:15,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:15,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:06:15,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:15,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:15,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 05:06:15,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:15,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:06:15,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421554126] [2020-10-13 05:06:15,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:06:15,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:06:15,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458640130] [2020-10-13 05:06:15,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:06:15,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:15,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:06:15,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:06:15,367 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-13 05:06:15,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:15,463 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-10-13 05:06:15,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:06:15,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-13 05:06:15,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:15,474 INFO L225 Difference]: With dead ends: 60 [2020-10-13 05:06:15,475 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 05:06:15,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:06:15,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 05:06:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 05:06:15,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 05:06:15,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-13 05:06:15,527 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-10-13 05:06:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:15,528 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-13 05:06:15,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:06:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-13 05:06:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 05:06:15,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:15,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:15,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:06:15,530 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:15,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1099238599, now seen corresponding path program 1 times [2020-10-13 05:06:15,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:15,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822381074] [2020-10-13 05:06:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:15,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:15,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:15,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:15,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:15,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:06:15,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:06:15,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-13 05:06:15,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:15,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:06:15,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:06:15,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:06:15,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:15,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:15,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:15,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:15,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:15,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:15,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:06:15,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:15,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:15,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:15,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:15,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:15,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:15,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:15,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:15,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:15,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:15,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:06:15,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:15,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:06:15,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:15,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:06:15,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:06:15,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822381074] [2020-10-13 05:06:15,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:06:15,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:06:15,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881436108] [2020-10-13 05:06:15,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:06:15,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:15,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:06:15,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:06:15,835 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-10-13 05:06:15,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:15,998 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-10-13 05:06:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:06:15,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-13 05:06:15,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:16,000 INFO L225 Difference]: With dead ends: 48 [2020-10-13 05:06:16,000 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 05:06:16,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:06:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 05:06:16,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-13 05:06:16,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 05:06:16,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-13 05:06:16,017 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-10-13 05:06:16,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:16,017 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-13 05:06:16,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:06:16,017 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-13 05:06:16,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:06:16,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:16,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:16,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:06:16,020 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:16,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:16,021 INFO L82 PathProgramCache]: Analyzing trace with hash 188437731, now seen corresponding path program 1 times [2020-10-13 05:06:16,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:16,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147227897] [2020-10-13 05:06:16,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:16,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:16,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:16,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:16,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:17,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:17,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:17,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:18,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:18,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:18,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:06:18,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:06:18,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2283 [2020-10-13 05:06:18,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:18,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:06:18,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:06:18,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:06:18,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:19,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:19,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:19,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:19,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:19,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:19,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:06:19,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:19,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:19,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:19,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:19,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:19,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:19,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:19,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:19,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:19,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:19,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:19,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:19,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:19,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:19,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:19,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:06:19,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147227897] [2020-10-13 05:06:19,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:19,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:06:19,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106602014] [2020-10-13 05:06:19,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:06:19,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:19,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:06:19,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:06:19,039 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 15 states. [2020-10-13 05:06:19,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:19,826 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-13 05:06:19,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:06:19,829 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-13 05:06:19,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:19,830 INFO L225 Difference]: With dead ends: 48 [2020-10-13 05:06:19,831 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 05:06:19,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:06:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 05:06:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-10-13 05:06:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 05:06:19,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-13 05:06:19,848 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2020-10-13 05:06:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:19,849 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-13 05:06:19,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:06:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-13 05:06:19,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:06:19,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:19,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:19,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:06:19,859 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:19,860 INFO L82 PathProgramCache]: Analyzing trace with hash 446603169, now seen corresponding path program 1 times [2020-10-13 05:06:19,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:19,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514188206] [2020-10-13 05:06:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:19,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:19,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:20,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:20,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:20,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:20,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:06:20,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:06:20,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 991 [2020-10-13 05:06:20,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:06:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:06:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:06:20,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:20,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:21,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:21,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:21,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:21,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:21,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:06:21,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:21,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:21,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:21,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:21,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:21,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:21,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:21,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:21,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:21,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:21,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:21,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:21,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:21,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:21,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:21,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:06:21,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514188206] [2020-10-13 05:06:21,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:21,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:06:21,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569104673] [2020-10-13 05:06:21,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:06:21,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:21,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:06:21,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:06:21,018 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2020-10-13 05:06:21,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:21,196 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-13 05:06:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:06:21,197 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 05:06:21,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:21,198 INFO L225 Difference]: With dead ends: 53 [2020-10-13 05:06:21,198 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 05:06:21,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:06:21,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 05:06:21,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-13 05:06:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 05:06:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-13 05:06:21,206 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2020-10-13 05:06:21,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:21,207 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-13 05:06:21,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:06:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-13 05:06:21,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 05:06:21,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:21,208 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:21,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:06:21,209 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:21,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:21,209 INFO L82 PathProgramCache]: Analyzing trace with hash -231251771, now seen corresponding path program 2 times [2020-10-13 05:06:21,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:21,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010159968] [2020-10-13 05:06:21,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:21,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:21,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:21,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:21,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 05:06:21,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:06:21,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 491 [2020-10-13 05:06:21,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:21,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:06:21,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 05:06:21,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 05:06:21,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:21,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:21,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:21,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:21,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:21,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:21,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:06:21,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:21,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:21,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:21,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:21,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:21,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:21,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:21,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:21,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:21,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:21,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:21,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:21,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:21,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:21,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:21,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:06:21,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010159968] [2020-10-13 05:06:21,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:21,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:06:21,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175455941] [2020-10-13 05:06:21,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:06:21,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:21,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:06:21,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:06:21,785 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 8 states. [2020-10-13 05:06:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:22,015 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-10-13 05:06:22,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:06:22,016 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 05:06:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:22,017 INFO L225 Difference]: With dead ends: 70 [2020-10-13 05:06:22,017 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 05:06:22,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:06:22,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 05:06:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-10-13 05:06:22,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 05:06:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-13 05:06:22,025 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 32 [2020-10-13 05:06:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:22,025 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-13 05:06:22,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:06:22,025 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-13 05:06:22,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:06:22,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:22,027 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:22,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:06:22,027 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:22,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:22,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1341613535, now seen corresponding path program 3 times [2020-10-13 05:06:22,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:22,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094682935] [2020-10-13 05:06:22,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:22,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:22,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:22,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:22,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:22,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:22,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:22,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:23,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:24,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:24,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:25,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:25,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 05:06:25,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:06:25,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3112 [2020-10-13 05:06:25,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:25,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:06:25,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 05:06:25,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:06:25,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:25,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:25,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:25,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:25,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:25,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:25,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:06:25,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:25,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:25,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:25,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:25,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:25,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:25,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:25,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:25,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:25,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:25,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:25,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:25,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:06:25,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094682935] [2020-10-13 05:06:25,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:25,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:06:25,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47038405] [2020-10-13 05:06:25,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:06:25,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:25,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:06:25,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:06:25,233 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 8 states. [2020-10-13 05:06:25,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:25,513 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-13 05:06:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:06:25,514 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 05:06:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:25,515 INFO L225 Difference]: With dead ends: 44 [2020-10-13 05:06:25,515 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 05:06:25,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:06:25,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 05:06:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 05:06:25,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 05:06:25,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-13 05:06:25,525 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 35 [2020-10-13 05:06:25,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:25,525 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-13 05:06:25,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:06:25,526 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-13 05:06:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 05:06:25,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:25,527 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:25,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:06:25,528 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:25,528 INFO L82 PathProgramCache]: Analyzing trace with hash -130866495, now seen corresponding path program 4 times [2020-10-13 05:06:25,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:25,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406601232] [2020-10-13 05:06:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:25,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:25,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:26,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:26,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:26,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:27,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:27,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:27,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:27,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:28,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:28,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:28,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:29,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:29,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:29,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:30,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:30,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:30,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:30,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:30,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 05:06:30,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 05:06:30,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:06:30,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:30,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:06:30,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:06:30,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:06:30,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:31,701 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-13 05:06:31,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:31,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:31,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:31,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:31,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:31,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:06:31,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:31,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:31,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:31,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:31,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:31,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:31,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:31,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:31,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:31,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:31,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:06:31,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:31,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:31,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:31,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:31,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:06:31,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406601232] [2020-10-13 05:06:31,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:31,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:06:31,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579543596] [2020-10-13 05:06:31,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:06:31,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:31,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:06:31,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:06:31,976 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 21 states. [2020-10-13 05:06:33,005 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-13 05:06:33,605 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-13 05:06:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:33,841 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-10-13 05:06:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:06:33,841 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-10-13 05:06:33,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:33,845 INFO L225 Difference]: With dead ends: 68 [2020-10-13 05:06:33,845 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 05:06:33,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:06:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 05:06:33,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-13 05:06:33,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 05:06:33,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-13 05:06:33,857 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 37 [2020-10-13 05:06:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:33,858 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-13 05:06:33,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:06:33,858 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-13 05:06:33,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 05:06:33,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:33,859 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:33,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:06:33,859 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:33,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:33,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1141983745, now seen corresponding path program 1 times [2020-10-13 05:06:33,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:33,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153370040] [2020-10-13 05:06:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:33,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:33,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:33,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:34,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:34,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:35,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:35,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:36,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:36,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:36,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 05:06:36,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:06:36,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2694 [2020-10-13 05:06:36,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:36,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:06:36,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:06:36,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:06:36,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:36,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:36,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:36,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:36,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:36,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:36,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:06:36,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:36,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:36,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:36,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:36,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:36,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:36,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:36,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:36,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:36,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:36,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:36,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:36,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:36,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:36,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:36,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 05:06:36,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153370040] [2020-10-13 05:06:36,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:36,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:06:36,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699808365] [2020-10-13 05:06:36,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:06:36,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:36,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:06:36,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:06:36,807 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 11 states. [2020-10-13 05:06:37,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:37,066 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2020-10-13 05:06:37,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:06:37,066 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-13 05:06:37,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:37,067 INFO L225 Difference]: With dead ends: 65 [2020-10-13 05:06:37,067 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 05:06:37,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:06:37,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 05:06:37,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-13 05:06:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 05:06:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-13 05:06:37,076 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 37 [2020-10-13 05:06:37,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:37,076 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-13 05:06:37,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:06:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-13 05:06:37,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:06:37,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:37,078 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:37,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:06:37,078 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:37,078 INFO L82 PathProgramCache]: Analyzing trace with hash -2139934941, now seen corresponding path program 5 times [2020-10-13 05:06:37,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:37,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486930431] [2020-10-13 05:06:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:37,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:37,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:38,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:38,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:06:38,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:06:38,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 976 [2020-10-13 05:06:38,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:38,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:06:38,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 05:06:38,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:06:38,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:38,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:38,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:38,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:38,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:38,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:38,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:38,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:38,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:38,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:38,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:38,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:38,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:38,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:38,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:38,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:38,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:38,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:38,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:38,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:38,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:38,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:38,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:06:38,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486930431] [2020-10-13 05:06:38,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:38,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:06:38,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887592770] [2020-10-13 05:06:38,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:06:38,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:38,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:06:38,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:06:38,166 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 10 states. [2020-10-13 05:06:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:38,410 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2020-10-13 05:06:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:06:38,410 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 05:06:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:38,411 INFO L225 Difference]: With dead ends: 99 [2020-10-13 05:06:38,412 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 05:06:38,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:06:38,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 05:06:38,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 51. [2020-10-13 05:06:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 05:06:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-13 05:06:38,422 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 39 [2020-10-13 05:06:38,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:38,422 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-13 05:06:38,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:06:38,422 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-13 05:06:38,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:06:38,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:38,423 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:38,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:06:38,424 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:38,424 INFO L82 PathProgramCache]: Analyzing trace with hash -356877885, now seen corresponding path program 6 times [2020-10-13 05:06:38,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:38,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279574505] [2020-10-13 05:06:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:38,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:38,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:38,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:38,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:39,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:39,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:39,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:39,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:40,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:41,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:42,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:42,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:42,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:43,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:43,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:43,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:06:43,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:06:43,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4841 [2020-10-13 05:06:43,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:43,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:06:43,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:06:43,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:06:43,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:43,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:43,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:43,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:43,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:43,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:43,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:43,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:43,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:43,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:43,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:43,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:43,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:43,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:43,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:43,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:43,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:43,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:43,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:43,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:06:43,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279574505] [2020-10-13 05:06:43,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:43,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:06:43,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322570923] [2020-10-13 05:06:43,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:06:43,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:43,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:06:43,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:06:43,361 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 10 states. [2020-10-13 05:06:43,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:43,673 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-10-13 05:06:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:06:43,674 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 05:06:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:43,676 INFO L225 Difference]: With dead ends: 61 [2020-10-13 05:06:43,676 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 05:06:43,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:06:43,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 05:06:43,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-10-13 05:06:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 05:06:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-13 05:06:43,684 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 39 [2020-10-13 05:06:43,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:43,685 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-13 05:06:43,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:06:43,685 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-13 05:06:43,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:06:43,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:43,686 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:43,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:06:43,687 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:43,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:43,687 INFO L82 PathProgramCache]: Analyzing trace with hash 352759267, now seen corresponding path program 7 times [2020-10-13 05:06:43,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:43,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835658663] [2020-10-13 05:06:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:43,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:44,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:44,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:45,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:45,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:46,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:47,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:47,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:47,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:47,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:48,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:48,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:48,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:48,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:06:48,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:06:48,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:06:48,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:48,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:06:48,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:06:48,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 05:06:48,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:49,497 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-13 05:06:50,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:50,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:50,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:50,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:50,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:50,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:50,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:50,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:50,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:50,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:50,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:50,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:50,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:50,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:50,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:50,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:50,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:50,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:50,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:50,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:50,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:50,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:06:50,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835658663] [2020-10-13 05:06:50,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:50,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:06:50,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797868152] [2020-10-13 05:06:50,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:06:50,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:50,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:06:50,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:06:50,733 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 27 states. [2020-10-13 05:06:51,808 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 41 [2020-10-13 05:06:52,344 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-10-13 05:06:53,146 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-13 05:06:53,448 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-13 05:06:54,200 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-13 05:06:54,498 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-13 05:06:54,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:54,680 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2020-10-13 05:06:54,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:06:54,680 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2020-10-13 05:06:54,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:54,682 INFO L225 Difference]: With dead ends: 65 [2020-10-13 05:06:54,682 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 05:06:54,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=209, Invalid=2241, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 05:06:54,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 05:06:54,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2020-10-13 05:06:54,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 05:06:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-13 05:06:54,693 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 44 [2020-10-13 05:06:54,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:54,694 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-13 05:06:54,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:06:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-13 05:06:54,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:06:54,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:54,695 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:54,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:06:54,696 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:54,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:54,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1336184475, now seen corresponding path program 2 times [2020-10-13 05:06:54,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:54,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158002609] [2020-10-13 05:06:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:54,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:54,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:54,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:55,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:55,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:55,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:55,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:55,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:56,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:58,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:58,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:58,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:58,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:59,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:59,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:59,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:06:59,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:06:59,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:06:59,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:59,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:06:59,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:06:59,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:06:59,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:59,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:59,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:59,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:59,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:59,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:59,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:06:59,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:59,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:59,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:59,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:59,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:06:59,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:59,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:59,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:59,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:59,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:59,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:59,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:59,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:59,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:59,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:59,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 05:06:59,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158002609] [2020-10-13 05:06:59,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:59,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:06:59,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763143029] [2020-10-13 05:06:59,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:06:59,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:59,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:06:59,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:06:59,843 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 9 states. [2020-10-13 05:07:00,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:00,196 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2020-10-13 05:07:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:07:00,197 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-13 05:07:00,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:00,198 INFO L225 Difference]: With dead ends: 76 [2020-10-13 05:07:00,198 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 05:07:00,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:07:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 05:07:00,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-13 05:07:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 05:07:00,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-13 05:07:00,207 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 44 [2020-10-13 05:07:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:00,208 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-13 05:07:00,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:07:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-13 05:07:00,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 05:07:00,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:00,209 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:00,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:07:00,209 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:00,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:00,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1232045627, now seen corresponding path program 8 times [2020-10-13 05:07:00,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:00,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182072329] [2020-10-13 05:07:00,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:00,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:00,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:01,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:01,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 05:07:01,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:07:01,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1046 [2020-10-13 05:07:01,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:01,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:07:01,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:07:01,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:07:01,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:01,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:01,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:01,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:01,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:01,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:01,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:01,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:01,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:01,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:01,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:01,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:01,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:01,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:01,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:07:01,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:01,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:01,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:01,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:01,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 05:07:01,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182072329] [2020-10-13 05:07:01,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:01,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:07:01,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430732711] [2020-10-13 05:07:01,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:07:01,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:01,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:07:01,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:07:01,374 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 12 states. [2020-10-13 05:07:01,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:01,730 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2020-10-13 05:07:01,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:07:01,731 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 05:07:01,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:01,732 INFO L225 Difference]: With dead ends: 107 [2020-10-13 05:07:01,732 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 05:07:01,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:07:01,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 05:07:01,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-13 05:07:01,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 05:07:01,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-13 05:07:01,741 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 46 [2020-10-13 05:07:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:01,742 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-13 05:07:01,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:07:01,742 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-13 05:07:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 05:07:01,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:01,743 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:01,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:07:01,743 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:01,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:01,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1566508697, now seen corresponding path program 9 times [2020-10-13 05:07:01,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:01,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589799526] [2020-10-13 05:07:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:01,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:01,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:01,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:01,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:01,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:02,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:03,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:03,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:03,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:04,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:04,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:04,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:04,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:05,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:05,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:05,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:05,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:05,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:05,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:05,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:05,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:05,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:05,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:06,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:06,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:06,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:06,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:06,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:06,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 05:07:06,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 36 [2020-10-13 05:07:06,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:07:06,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:06,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:07:06,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:07:06,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:07:06,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:07,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:07,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:07,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:07,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:07,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:07,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:07,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:07,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:07,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:07,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:07,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:07,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:07,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:07,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:07,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:07,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:07,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:07,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:07,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:07:07,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589799526] [2020-10-13 05:07:07,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:07,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:07:07,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563541136] [2020-10-13 05:07:07,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:07:07,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:07,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:07:07,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:07:07,034 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 18 states. [2020-10-13 05:07:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:09,492 INFO L93 Difference]: Finished difference Result 123 states and 140 transitions. [2020-10-13 05:07:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 05:07:09,492 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-13 05:07:09,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:09,494 INFO L225 Difference]: With dead ends: 123 [2020-10-13 05:07:09,495 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 05:07:09,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=717, Invalid=3443, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 05:07:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 05:07:09,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-13 05:07:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 05:07:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-10-13 05:07:09,510 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 49 [2020-10-13 05:07:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:09,511 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-10-13 05:07:09,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:07:09,511 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-10-13 05:07:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:07:09,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:09,512 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:09,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:07:09,512 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:09,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:09,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1187378249, now seen corresponding path program 10 times [2020-10-13 05:07:09,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:09,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019453013] [2020-10-13 05:07:09,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:09,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:10,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:10,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:11,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:12,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:13,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:13,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:14,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:14,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:14,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:07:14,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:07:14,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:07:14,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:14,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:07:14,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:14,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:07:14,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:15,562 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-13 05:07:15,848 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-13 05:07:16,431 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-13 05:07:18,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:18,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:18,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:18,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:18,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:18,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:18,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:18,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:18,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:18,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:18,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:18,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:18,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:18,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:18,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:18,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:18,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:07:18,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:18,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:18,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:18,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:18,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:18,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019453013] [2020-10-13 05:07:18,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:18,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:07:18,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827953423] [2020-10-13 05:07:18,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:07:18,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:18,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:07:18,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:07:18,311 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 35 states. [2020-10-13 05:07:20,263 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-13 05:07:20,694 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-13 05:07:20,928 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 43 [2020-10-13 05:07:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:22,211 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2020-10-13 05:07:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 05:07:22,212 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 51 [2020-10-13 05:07:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:22,213 INFO L225 Difference]: With dead ends: 110 [2020-10-13 05:07:22,214 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 05:07:22,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=291, Invalid=2571, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 05:07:22,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 05:07:22,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2020-10-13 05:07:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 05:07:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2020-10-13 05:07:22,235 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 51 [2020-10-13 05:07:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:22,236 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2020-10-13 05:07:22,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:07:22,236 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2020-10-13 05:07:22,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:07:22,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:22,237 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:22,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:07:22,237 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:22,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1610080075, now seen corresponding path program 3 times [2020-10-13 05:07:22,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:22,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439375729] [2020-10-13 05:07:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:22,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:22,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:22,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:23,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:23,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:23,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:23,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:24,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:24,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:24,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:25,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:25,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:26,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:26,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:26,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:26,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:26,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:26,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:26,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:27,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:27,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:07:27,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 05:07:27,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:07:27,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:27,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:07:27,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:27,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:07:27,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:27,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:27,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:27,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:27,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:27,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:27,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:27,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:27,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:27,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:27,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:27,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:27,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:27,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:27,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:27,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:27,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:27,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:07:27,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:27,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:27,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:27,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:27,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 05:07:27,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439375729] [2020-10-13 05:07:27,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:27,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:07:27,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95728875] [2020-10-13 05:07:27,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:07:27,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:27,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:07:27,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:07:27,406 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand 11 states. [2020-10-13 05:07:27,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:27,855 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2020-10-13 05:07:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:07:27,855 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-13 05:07:27,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:27,856 INFO L225 Difference]: With dead ends: 131 [2020-10-13 05:07:27,856 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 05:07:27,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:07:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 05:07:27,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-10-13 05:07:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 05:07:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-10-13 05:07:27,871 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 51 [2020-10-13 05:07:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:27,871 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-10-13 05:07:27,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:07:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-10-13 05:07:27,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:07:27,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:27,872 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:27,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:07:27,873 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:27,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:27,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1972879019, now seen corresponding path program 11 times [2020-10-13 05:07:27,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:27,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198191063] [2020-10-13 05:07:27,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:27,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:27,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:29,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:29,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 05:07:29,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:07:29,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1785 [2020-10-13 05:07:29,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:29,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:07:29,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:07:29,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:07:29,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:29,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:29,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:29,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:29,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:29,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:29,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:29,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:29,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:29,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:29,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:29,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:29,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:29,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:29,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:29,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:29,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:29,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:07:29,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:29,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:29,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:29,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:29,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:07:29,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198191063] [2020-10-13 05:07:29,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:29,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:07:29,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130244065] [2020-10-13 05:07:29,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:07:29,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:29,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:07:29,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:07:29,863 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 14 states. [2020-10-13 05:07:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:30,392 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2020-10-13 05:07:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:07:30,393 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-13 05:07:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:30,395 INFO L225 Difference]: With dead ends: 152 [2020-10-13 05:07:30,395 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 05:07:30,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:07:30,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 05:07:30,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 78. [2020-10-13 05:07:30,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 05:07:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2020-10-13 05:07:30,408 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 53 [2020-10-13 05:07:30,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:30,409 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2020-10-13 05:07:30,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:07:30,409 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2020-10-13 05:07:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:07:30,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:30,410 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:30,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:07:30,410 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:30,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:30,410 INFO L82 PathProgramCache]: Analyzing trace with hash 98557899, now seen corresponding path program 12 times [2020-10-13 05:07:30,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:30,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869496089] [2020-10-13 05:07:30,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:30,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:30,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:31,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:32,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:32,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:33,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:33,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:34,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:35,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 05:07:35,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:07:35,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:07:35,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:35,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:07:35,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:35,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:07:35,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:35,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:35,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:35,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:35,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:35,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:35,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:35,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:35,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:35,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:35,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:35,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:35,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:35,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:35,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:35,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:35,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:35,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:35,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:35,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:35,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:35,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:07:35,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869496089] [2020-10-13 05:07:35,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:35,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:07:35,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711959624] [2020-10-13 05:07:35,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:07:35,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:35,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:07:35,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:07:35,591 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 14 states. [2020-10-13 05:07:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:36,377 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-10-13 05:07:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:07:36,378 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-13 05:07:36,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:36,379 INFO L225 Difference]: With dead ends: 95 [2020-10-13 05:07:36,379 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 05:07:36,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:07:36,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 05:07:36,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2020-10-13 05:07:36,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 05:07:36,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-13 05:07:36,391 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 53 [2020-10-13 05:07:36,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:36,391 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-13 05:07:36,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:07:36,392 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-13 05:07:36,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:07:36,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:36,401 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:36,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:07:36,402 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:36,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:36,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1189396253, now seen corresponding path program 13 times [2020-10-13 05:07:36,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:36,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021514442] [2020-10-13 05:07:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:36,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:36,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:40,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:40,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:41,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:41,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:07:41,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:07:41,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:07:41,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:41,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 05:07:41,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:41,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:07:41,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:42,505 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-13 05:07:42,699 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-13 05:07:42,980 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-13 05:07:43,167 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-13 05:07:43,349 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-13 05:07:43,620 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-13 05:07:43,826 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-13 05:07:44,078 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-13 05:07:44,245 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-13 05:07:44,423 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-13 05:07:44,599 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-13 05:07:44,814 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2020-10-13 05:07:46,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:46,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:46,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:46,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:46,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:46,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:46,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:46,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:46,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:46,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:46,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:46,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:46,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:46,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:46,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:46,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:46,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:07:46,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:46,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:46,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:46,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:46,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:07:46,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021514442] [2020-10-13 05:07:46,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:46,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 05:07:46,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630535849] [2020-10-13 05:07:46,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 05:07:46,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:46,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 05:07:46,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:07:46,665 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 38 states. [2020-10-13 05:07:47,627 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-13 05:07:49,200 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 124 [2020-10-13 05:07:50,230 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 119 [2020-10-13 05:07:51,287 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2020-10-13 05:07:51,616 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 51 [2020-10-13 05:07:51,950 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2020-10-13 05:07:52,341 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-10-13 05:07:52,653 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-13 05:07:52,855 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-13 05:07:53,210 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2020-10-13 05:07:54,409 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 140 [2020-10-13 05:07:55,185 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 121 [2020-10-13 05:07:56,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:56,720 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-13 05:07:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 05:07:56,721 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 58 [2020-10-13 05:07:56,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:56,722 INFO L225 Difference]: With dead ends: 90 [2020-10-13 05:07:56,722 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 05:07:56,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=504, Invalid=4608, Unknown=0, NotChecked=0, Total=5112 [2020-10-13 05:07:56,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 05:07:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2020-10-13 05:07:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 05:07:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-13 05:07:56,735 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 58 [2020-10-13 05:07:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:56,736 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-13 05:07:56,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 05:07:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-13 05:07:56,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:07:56,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:56,737 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:56,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:07:56,737 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:56,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1300132709, now seen corresponding path program 4 times [2020-10-13 05:07:56,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:56,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147474885] [2020-10-13 05:07:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:56,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:56,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:57,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:57,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:57,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:58,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:58,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:58,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:59,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:59,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:59,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:59,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:00,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:01,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:01,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:08:01,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:08:01,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:08:01,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:01,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:08:01,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 05:08:01,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:08:01,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:02,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:02,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:02,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:02,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:02,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:02,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:08:02,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:02,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:02,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:02,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:02,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:02,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:02,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:02,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:02,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:02,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:02,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:02,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:02,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:02,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:02,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:02,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-13 05:08:02,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147474885] [2020-10-13 05:08:02,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:02,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:08:02,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449168120] [2020-10-13 05:08:02,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:08:02,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:02,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:08:02,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:08:02,323 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 14 states. [2020-10-13 05:08:03,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:03,246 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-10-13 05:08:03,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:08:03,247 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-10-13 05:08:03,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:03,248 INFO L225 Difference]: With dead ends: 88 [2020-10-13 05:08:03,248 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 05:08:03,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:08:03,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 05:08:03,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 05:08:03,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 05:08:03,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2020-10-13 05:08:03,260 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 58 [2020-10-13 05:08:03,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:03,260 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2020-10-13 05:08:03,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:08:03,260 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2020-10-13 05:08:03,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:08:03,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:03,261 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:03,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:08:03,261 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:03,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:03,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1479783227, now seen corresponding path program 14 times [2020-10-13 05:08:03,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:03,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542522327] [2020-10-13 05:08:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:03,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:06,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:08:06,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:08:06,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2983 [2020-10-13 05:08:06,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:06,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:08:06,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:08:06,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 05:08:06,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:06,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:06,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:06,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:06,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:06,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:06,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:06,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:06,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:06,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:06,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:06,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:06,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:06,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:06,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:06,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:06,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:06,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:06,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:06,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:06,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 05:08:06,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542522327] [2020-10-13 05:08:06,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:06,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:08:06,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348921395] [2020-10-13 05:08:06,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:08:06,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:06,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:08:06,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:08:06,435 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 16 states. [2020-10-13 05:08:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:06,984 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2020-10-13 05:08:06,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:08:06,985 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-13 05:08:06,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:06,986 INFO L225 Difference]: With dead ends: 153 [2020-10-13 05:08:06,986 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 05:08:06,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:08:06,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 05:08:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2020-10-13 05:08:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 05:08:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-13 05:08:06,999 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 60 [2020-10-13 05:08:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:06,999 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-13 05:08:06,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:08:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-13 05:08:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 05:08:07,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:07,000 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:07,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:08:07,000 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:07,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:07,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1262096657, now seen corresponding path program 15 times [2020-10-13 05:08:07,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:07,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59133696] [2020-10-13 05:08:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:07,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:08,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:12,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 05:08:12,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:08:12,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:08:12,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:12,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:08:12,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 05:08:12,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:08:12,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:12,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:12,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:12,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:12,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:12,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:12,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:12,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:12,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:12,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:12,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:12,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:12,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:12,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:12,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:12,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:12,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:12,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:12,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:12,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:12,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:12,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:08:12,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59133696] [2020-10-13 05:08:12,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:12,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:08:12,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517466666] [2020-10-13 05:08:12,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:08:12,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:12,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:08:12,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:08:12,189 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 16 states. [2020-10-13 05:08:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:12,890 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-10-13 05:08:12,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:08:12,894 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-13 05:08:12,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:12,894 INFO L225 Difference]: With dead ends: 79 [2020-10-13 05:08:12,894 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 05:08:12,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:08:12,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 05:08:12,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2020-10-13 05:08:12,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 05:08:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-13 05:08:12,904 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 63 [2020-10-13 05:08:12,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:12,905 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-13 05:08:12,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:08:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-13 05:08:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:08:12,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:12,905 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:12,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:08:12,906 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:12,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:12,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1669572561, now seen corresponding path program 16 times [2020-10-13 05:08:12,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:12,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944960592] [2020-10-13 05:08:12,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:12,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:13,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:14,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:15,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:16,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:17,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:17,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:17,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 05:08:17,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:08:17,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:08:17,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:17,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 05:08:17,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:17,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:08:17,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:18,797 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-13 05:08:19,155 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 42 [2020-10-13 05:08:19,337 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 42 [2020-10-13 05:08:19,589 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2020-10-13 05:08:19,812 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 46 [2020-10-13 05:08:20,061 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 48 [2020-10-13 05:08:20,326 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 47 [2020-10-13 05:08:20,690 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 60 [2020-10-13 05:08:21,014 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2020-10-13 05:08:21,414 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 56 [2020-10-13 05:08:21,730 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 53 [2020-10-13 05:08:22,103 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 61 [2020-10-13 05:08:22,407 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 56 [2020-10-13 05:08:22,842 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 56 [2020-10-13 05:08:23,209 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 51 [2020-10-13 05:08:23,615 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 65 [2020-10-13 05:08:23,925 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2020-10-13 05:08:24,138 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-13 05:08:24,550 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-13 05:08:26,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:26,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:26,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:26,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:26,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:26,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:26,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:26,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:26,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:26,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:26,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:26,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:26,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:26,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:26,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:26,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:26,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:26,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:26,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:26,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:26,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:26,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:08:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 20 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:08:26,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944960592] [2020-10-13 05:08:26,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:26,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 05:08:26,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013115743] [2020-10-13 05:08:26,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 05:08:26,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:26,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 05:08:26,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 05:08:26,982 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 44 states. [2020-10-13 05:08:27,262 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 3 [2020-10-13 05:08:27,611 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 15 [2020-10-13 05:08:28,602 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-13 05:08:28,828 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-13 05:08:29,069 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-13 05:08:29,311 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-13 05:08:29,603 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-13 05:08:29,850 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-13 05:08:30,090 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-13 05:08:30,372 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-13 05:08:30,628 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-13 05:08:30,914 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-13 05:08:31,621 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2020-10-13 05:08:31,885 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-13 05:08:32,808 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-13 05:08:33,207 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-13 05:08:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:35,012 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2020-10-13 05:08:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 05:08:35,013 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 65 [2020-10-13 05:08:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:35,014 INFO L225 Difference]: With dead ends: 114 [2020-10-13 05:08:35,014 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 05:08:35,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=407, Invalid=4423, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 05:08:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 05:08:35,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2020-10-13 05:08:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 05:08:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2020-10-13 05:08:35,029 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 65 [2020-10-13 05:08:35,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:35,029 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2020-10-13 05:08:35,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 05:08:35,029 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2020-10-13 05:08:35,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:08:35,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:35,030 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:35,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:08:35,030 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:35,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1160099471, now seen corresponding path program 5 times [2020-10-13 05:08:35,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:35,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190824030] [2020-10-13 05:08:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:35,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:35,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:35,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:35,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:35,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:35,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:36,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:36,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:36,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:37,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:37,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:37,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:39,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:39,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:39,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:39,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:39,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:40,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:40,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 05:08:40,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-13 05:08:40,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-13 05:08:40,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:40,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:08:40,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:40,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:08:40,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:40,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:40,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:40,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:40,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:40,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:40,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:40,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:40,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:40,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:40,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:40,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:40,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:40,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:40,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:40,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:40,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:40,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:40,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:40,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:40,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:40,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:40,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 29 proven. 45 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 05:08:40,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190824030] [2020-10-13 05:08:40,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:40,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:08:40,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816479463] [2020-10-13 05:08:40,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:08:40,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:40,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:08:40,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:08:40,391 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand 13 states. [2020-10-13 05:08:41,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:41,149 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2020-10-13 05:08:41,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:08:41,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-13 05:08:41,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:41,153 INFO L225 Difference]: With dead ends: 112 [2020-10-13 05:08:41,153 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 05:08:41,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:08:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 05:08:41,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-13 05:08:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 05:08:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-10-13 05:08:41,168 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 65 [2020-10-13 05:08:41,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:41,169 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-10-13 05:08:41,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:08:41,169 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-10-13 05:08:41,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 05:08:41,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:41,170 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:41,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:08:41,170 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:41,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:41,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1322403795, now seen corresponding path program 17 times [2020-10-13 05:08:41,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:41,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046011132] [2020-10-13 05:08:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:41,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:41,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:43,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:44,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:45,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:46,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:46,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 05:08:46,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:08:46,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-13 05:08:46,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:46,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:08:46,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:46,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 05:08:46,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:46,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:46,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:46,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:46,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:46,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:46,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:46,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:46,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:46,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:46,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:46,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:46,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:46,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:46,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:46,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:46,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:46,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:46,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:46,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:46,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:46,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:46,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:08:46,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046011132] [2020-10-13 05:08:46,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:46,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:08:46,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616056730] [2020-10-13 05:08:46,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:08:46,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:46,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:08:46,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:08:46,486 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 18 states. [2020-10-13 05:08:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:47,462 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2020-10-13 05:08:47,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:08:47,463 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-10-13 05:08:47,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:47,464 INFO L225 Difference]: With dead ends: 127 [2020-10-13 05:08:47,464 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 05:08:47,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:08:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 05:08:47,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 71. [2020-10-13 05:08:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 05:08:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-10-13 05:08:47,476 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 67 [2020-10-13 05:08:47,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:47,476 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-10-13 05:08:47,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:08:47,477 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-10-13 05:08:47,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 05:08:47,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:47,478 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:47,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:08:47,478 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:47,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:47,478 INFO L82 PathProgramCache]: Analyzing trace with hash -896811867, now seen corresponding path program 18 times [2020-10-13 05:08:47,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:47,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172062487] [2020-10-13 05:08:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:47,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:47,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:47,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:47,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:47,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:47,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:47,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:47,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:47,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:48,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:48,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:52,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:52,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 05:08:52,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:08:52,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:08:52,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:52,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:08:52,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:52,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:08:52,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:52,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:52,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:52,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:52,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:52,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:52,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:52,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:52,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:52,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:52,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:52,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:52,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:52,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:52,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:52,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:52,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:52,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:52,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:52,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:52,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:52,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:52,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 05:08:52,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172062487] [2020-10-13 05:08:52,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:52,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:08:52,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385981193] [2020-10-13 05:08:52,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:08:52,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:52,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:08:52,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:08:52,711 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 18 states. [2020-10-13 05:08:53,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:53,262 INFO L93 Difference]: Finished difference Result 139 states and 153 transitions. [2020-10-13 05:08:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:08:53,264 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-13 05:08:53,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:53,265 INFO L225 Difference]: With dead ends: 139 [2020-10-13 05:08:53,266 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 05:08:53,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:08:53,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 05:08:53,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-10-13 05:08:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 05:08:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-10-13 05:08:53,278 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 70 [2020-10-13 05:08:53,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:53,279 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-10-13 05:08:53,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:08:53,279 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-10-13 05:08:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 05:08:53,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:53,279 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:53,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:08:53,280 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:53,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:53,280 INFO L82 PathProgramCache]: Analyzing trace with hash -892678685, now seen corresponding path program 19 times [2020-10-13 05:08:53,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:53,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495184892] [2020-10-13 05:08:53,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:53,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:54,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:56,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:58,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:58,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 05:08:58,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:08:58,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:08:58,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:58,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 05:08:58,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:58,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 05:08:58,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:59,003 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-13 05:08:59,178 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-13 05:08:59,339 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-10-13 05:08:59,626 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-13 05:08:59,889 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2020-10-13 05:09:00,089 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2020-10-13 05:09:00,368 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2020-10-13 05:09:00,632 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2020-10-13 05:09:00,897 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2020-10-13 05:09:01,118 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2020-10-13 05:09:01,442 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 59 [2020-10-13 05:09:01,726 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2020-10-13 05:09:02,059 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 60 [2020-10-13 05:09:02,336 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2020-10-13 05:09:02,664 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2020-10-13 05:09:02,918 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-13 05:09:03,249 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2020-10-13 05:09:03,716 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 75 [2020-10-13 05:09:04,087 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2020-10-13 05:09:04,622 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 77 [2020-10-13 05:09:05,102 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 75 [2020-10-13 05:09:05,663 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2020-10-13 05:09:06,280 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 88 [2020-10-13 05:09:06,775 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 74 [2020-10-13 05:09:07,230 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-10-13 05:09:07,611 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-13 05:09:08,059 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 73 [2020-10-13 05:09:08,432 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2020-10-13 05:09:08,859 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2020-10-13 05:09:09,221 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-13 05:09:09,585 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-13 05:09:09,930 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-13 05:09:10,324 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-13 05:09:10,653 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-13 05:09:11,036 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-13 05:09:11,368 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-13 05:09:11,699 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-13 05:09:13,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:13,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:13,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:13,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:13,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:13,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:13,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:13,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:13,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:13,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:13,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:13,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:13,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:13,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:13,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:13,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:13,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:09:13,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:13,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:13,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:13,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:13,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:09:13,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495184892] [2020-10-13 05:09:13,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:13,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 05:09:13,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544556570] [2020-10-13 05:09:13,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 05:09:13,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:13,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 05:09:13,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 05:09:13,155 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand 53 states. [2020-10-13 05:09:13,464 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 3 [2020-10-13 05:09:13,858 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 15 [2020-10-13 05:09:15,414 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-13 05:09:16,489 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 69 [2020-10-13 05:09:17,708 WARN L193 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 78 [2020-10-13 05:09:18,736 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 75 [2020-10-13 05:09:19,880 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 78 [2020-10-13 05:09:20,654 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 70 [2020-10-13 05:09:21,496 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 67 [2020-10-13 05:09:22,248 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 66 [2020-10-13 05:09:26,648 WARN L193 SmtUtils]: Spent 3.94 s on a formula simplification. DAG size of input: 418 DAG size of output: 166 [2020-10-13 05:09:27,719 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 67 [2020-10-13 05:09:28,092 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-13 05:09:28,832 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 64 [2020-10-13 05:09:29,272 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-10-13 05:09:33,630 WARN L193 SmtUtils]: Spent 3.87 s on a formula simplification. DAG size of input: 442 DAG size of output: 165 [2020-10-13 05:09:34,343 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 60 [2020-10-13 05:09:35,014 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2020-10-13 05:09:35,583 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 56 [2020-10-13 05:09:36,203 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-10-13 05:09:37,089 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 81 [2020-10-13 05:09:37,769 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 59 [2020-10-13 05:09:38,730 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 88 [2020-10-13 05:09:39,879 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 76 [2020-10-13 05:09:40,626 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 64 [2020-10-13 05:09:42,355 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 200 DAG size of output: 128 [2020-10-13 05:09:42,848 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2020-10-13 05:09:44,694 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 204 DAG size of output: 134 [2020-10-13 05:09:45,251 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 66 [2020-10-13 05:09:46,361 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 100 [2020-10-13 05:09:48,190 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 236 DAG size of output: 64 [2020-10-13 05:09:49,030 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 93 [2020-10-13 05:09:50,443 WARN L193 SmtUtils]: Spent 954.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 68 [2020-10-13 05:09:51,310 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 99 [2020-10-13 05:09:52,767 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 204 DAG size of output: 75 [2020-10-13 05:09:54,452 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 245 DAG size of output: 63 [2020-10-13 05:09:56,772 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 206 DAG size of output: 111 [2020-10-13 05:09:58,192 WARN L193 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 58