/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/res2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:07:57,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:07:57,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:07:57,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:07:57,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:07:57,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:07:57,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:07:57,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:07:57,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:07:57,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:07:57,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:07:57,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:07:57,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:07:57,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:07:57,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:07:57,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:07:57,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:07:57,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:07:57,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:07:57,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:07:57,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:07:57,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:07:57,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:07:57,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:07:57,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:07:57,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:07:57,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:07:57,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:07:57,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:07:57,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:07:57,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:07:57,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:07:57,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:07:57,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:07:57,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:07:57,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:07:57,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:07:57,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:07:57,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:07:57,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:07:57,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:07:57,994 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 05:07:58,015 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:07:58,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:07:58,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:07:58,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:07:58,017 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:07:58,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:07:58,018 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:07:58,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:07:58,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:07:58,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:07:58,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:07:58,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:07:58,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:07:58,019 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:07:58,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:07:58,019 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:07:58,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:07:58,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:07:58,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:07:58,020 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:07:58,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:07:58,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:07:58,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:07:58,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:07:58,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:07:58,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:07:58,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:07:58,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:07:58,022 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:07:58,022 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 05:07:58,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:07:58,322 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:07:58,325 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:07:58,327 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:07:58,327 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:07:58,328 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2.c [2020-10-13 05:07:58,388 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11b5f16b3/515657e18e624f47963606e2345e2798/FLAGcd3ee2ed2 [2020-10-13 05:07:58,822 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:07:58,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res2.c [2020-10-13 05:07:58,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11b5f16b3/515657e18e624f47963606e2345e2798/FLAGcd3ee2ed2 [2020-10-13 05:07:59,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11b5f16b3/515657e18e624f47963606e2345e2798 [2020-10-13 05:07:59,211 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:07:59,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:07:59,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:07:59,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:07:59,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:07:59,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:07:59" (1/1) ... [2020-10-13 05:07:59,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5badac6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:59, skipping insertion in model container [2020-10-13 05:07:59,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:07:59" (1/1) ... [2020-10-13 05:07:59,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:07:59,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:07:59,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:07:59,489 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:07:59,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:07:59,662 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:07:59,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:59 WrapperNode [2020-10-13 05:07:59,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:07:59,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:07:59,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:07:59,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:07:59,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:59" (1/1) ... [2020-10-13 05:07:59,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:59" (1/1) ... [2020-10-13 05:07:59,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:59" (1/1) ... [2020-10-13 05:07:59,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:59" (1/1) ... [2020-10-13 05:07:59,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:59" (1/1) ... [2020-10-13 05:07:59,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:59" (1/1) ... [2020-10-13 05:07:59,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:59" (1/1) ... [2020-10-13 05:07:59,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:07:59,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:07:59,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:07:59,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:07:59,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:59" (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 05:07:59,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:07:59,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:07:59,800 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:07:59,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:07:59,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:07:59,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:07:59,801 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:07:59,802 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:07:59,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:07:59,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:07:59,802 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:07:59,803 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:07:59,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:07:59,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:07:59,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:07:59,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:07:59,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:07:59,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:07:59,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:08:00,088 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:08:00,088 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-13 05:08:00,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:08:00 BoogieIcfgContainer [2020-10-13 05:08:00,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:08:00,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:08:00,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:08:00,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:08:00,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:07:59" (1/3) ... [2020-10-13 05:08:00,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a529d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:08:00, skipping insertion in model container [2020-10-13 05:08:00,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:59" (2/3) ... [2020-10-13 05:08:00,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a529d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:08:00, skipping insertion in model container [2020-10-13 05:08:00,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:08:00" (3/3) ... [2020-10-13 05:08:00,101 INFO L109 eAbstractionObserver]: Analyzing ICFG res2.c [2020-10-13 05:08:00,115 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:08:00,135 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:08:00,172 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:08:00,219 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:08:00,219 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:08:00,219 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:08:00,219 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:08:00,220 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:08:00,220 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:08:00,220 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:08:00,220 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:08:00,241 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-13 05:08:00,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 05:08:00,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:00,249 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] [2020-10-13 05:08:00,249 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:00,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:00,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1797528887, now seen corresponding path program 1 times [2020-10-13 05:08:00,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:00,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074062115] [2020-10-13 05:08:00,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:00,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:00,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:00,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:00,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:00,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:00,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:00,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:01,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:01,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:01,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 05:08:01,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:08:01,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1252 [2020-10-13 05:08:01,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 05:08:01,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:01,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:08:01,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:01,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:01,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:01,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:01,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:01,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:08:01,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:01,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:01,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:01,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:01,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:08:01,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:01,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:01,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:01,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:01,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:01,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:08:01,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:08:01,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:01,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:01,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:01,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:01,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:08:01,780 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 05:08:01,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074062115] [2020-10-13 05:08:01,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:08:01,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:08:01,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140227679] [2020-10-13 05:08:01,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:08:01,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:01,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:08:01,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:08:01,815 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2020-10-13 05:08:02,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:02,010 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2020-10-13 05:08:02,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:08:02,013 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-13 05:08:02,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:02,028 INFO L225 Difference]: With dead ends: 76 [2020-10-13 05:08:02,028 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 05:08:02,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 05:08:02,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 05:08:02,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-13 05:08:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 05:08:02,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-13 05:08:02,087 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 29 [2020-10-13 05:08:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:02,088 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-13 05:08:02,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:08:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-13 05:08:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 05:08:02,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:02,091 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] [2020-10-13 05:08:02,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:08:02,096 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:02,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:02,097 INFO L82 PathProgramCache]: Analyzing trace with hash 120259143, now seen corresponding path program 1 times [2020-10-13 05:08:02,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:02,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727910886] [2020-10-13 05:08:02,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:02,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:02,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:02,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:02,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:02,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:02,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:05,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:05,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 05:08:05,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:08:05,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3322 [2020-10-13 05:08:05,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:05,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:08:05,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:08:05,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:08:05,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:05,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:05,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:05,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:05,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:05,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:05,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:08:05,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:05,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:05,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:05,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:05,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:08:05,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:05,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:05,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:05,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:05,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:05,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:08:05,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:05,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:08:05,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:05,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:08:05,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:05,523 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 05:08:05,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727910886] [2020-10-13 05:08:05,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:08:05,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:08:05,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140855748] [2020-10-13 05:08:05,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:08:05,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:05,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:08:05,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:08:05,528 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2020-10-13 05:08:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:05,713 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2020-10-13 05:08:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:08:05,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-13 05:08:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:05,715 INFO L225 Difference]: With dead ends: 69 [2020-10-13 05:08:05,715 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 05:08:05,716 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 05:08:05,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 05:08:05,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-13 05:08:05,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 05:08:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-13 05:08:05,726 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-10-13 05:08:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:05,727 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-13 05:08:05,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:08:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-13 05:08:05,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:08:05,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:05,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:05,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:08:05,729 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:05,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:05,730 INFO L82 PathProgramCache]: Analyzing trace with hash -774790125, now seen corresponding path program 1 times [2020-10-13 05:08:05,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:05,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031803207] [2020-10-13 05:08:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:05,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:06,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:08,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:09,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:09,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:09,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:10,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:10,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:10,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 05:08:10,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:08:10,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:08:10,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:10,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:08:10,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:10,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:08:10,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:11,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:11,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:11,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:11,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:11,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:08:11,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:11,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:11,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:11,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:11,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:11,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:11,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:11,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:11,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:11,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:11,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:11,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:11,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:11,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:11,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:08:12,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031803207] [2020-10-13 05:08:12,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:12,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:08:12,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091100664] [2020-10-13 05:08:12,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:08:12,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:12,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:08:12,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:08:12,010 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 21 states. [2020-10-13 05:08:13,189 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-13 05:08:13,397 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-13 05:08:14,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:14,874 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-10-13 05:08:14,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:08:14,875 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-10-13 05:08:14,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:14,877 INFO L225 Difference]: With dead ends: 80 [2020-10-13 05:08:14,877 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 05:08:14,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=267, Invalid=1803, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:08:14,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 05:08:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-13 05:08:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 05:08:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-10-13 05:08:14,890 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 41 [2020-10-13 05:08:14,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:14,890 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-10-13 05:08:14,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:08:14,890 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-10-13 05:08:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 05:08:14,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:14,892 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:14,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:08:14,893 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:14,893 INFO L82 PathProgramCache]: Analyzing trace with hash 96401429, now seen corresponding path program 2 times [2020-10-13 05:08:14,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:14,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194654967] [2020-10-13 05:08:14,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:14,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:14,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:14,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:15,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:16,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:19,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:19,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:08:19,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:08:19,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:08:19,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:19,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:08:19,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:08:19,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:08:19,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:08:19,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:19,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:19,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:19,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:19,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:19,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:19,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:19,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:19,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:19,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:19,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:19,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:19,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:19,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:19,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:19,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:19,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:19,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:19,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:19,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:19,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:19,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:08:19,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194654967] [2020-10-13 05:08:19,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:19,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:08:19,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134583688] [2020-10-13 05:08:19,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:08:19,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:19,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:08:19,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:08:19,983 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 8 states. [2020-10-13 05:08:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:20,258 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2020-10-13 05:08:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:08:20,259 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-13 05:08:20,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:20,260 INFO L225 Difference]: With dead ends: 139 [2020-10-13 05:08:20,260 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 05:08:20,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 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 05:08:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 05:08:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2020-10-13 05:08:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 05:08:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-10-13 05:08:20,284 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 43 [2020-10-13 05:08:20,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:20,285 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-10-13 05:08:20,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:08:20,286 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-10-13 05:08:20,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 05:08:20,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:20,290 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:20,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:08:20,291 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:20,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:20,292 INFO L82 PathProgramCache]: Analyzing trace with hash -865771691, now seen corresponding path program 3 times [2020-10-13 05:08:20,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:20,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510267498] [2020-10-13 05:08:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:20,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:20,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:25,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:25,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:08:25,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:08:25,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:08:25,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:25,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:08:25,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:25,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:08:25,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:25,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:25,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:25,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:25,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:25,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:25,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:25,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:25,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:25,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:25,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:25,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:25,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:25,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:25,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:25,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:25,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:25,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:25,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:25,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:25,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:25,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:08:25,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510267498] [2020-10-13 05:08:25,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:25,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:08:25,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373579386] [2020-10-13 05:08:25,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:08:25,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:25,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:08:25,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:08:25,373 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 8 states. [2020-10-13 05:08:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:25,613 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2020-10-13 05:08:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:08:25,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-13 05:08:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:25,615 INFO L225 Difference]: With dead ends: 76 [2020-10-13 05:08:25,615 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 05:08:25,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:08:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 05:08:25,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-13 05:08:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 05:08:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-13 05:08:25,623 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 43 [2020-10-13 05:08:25,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:25,624 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-13 05:08:25,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:08:25,624 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-13 05:08:25,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:08:25,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:25,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:25,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:08:25,626 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:25,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:25,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1021500449, now seen corresponding path program 4 times [2020-10-13 05:08:25,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:25,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965863959] [2020-10-13 05:08:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:25,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:26,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:26,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:27,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:27,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:28,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:29,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:29,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:30,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:30,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:30,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:30,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 05:08:30,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:08:30,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5100 [2020-10-13 05:08:30,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:30,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:08:30,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:30,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:08:30,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:33,115 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-13 05:08:33,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:33,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:33,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:33,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:33,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:33,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:33,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:33,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:33,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:33,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:33,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:33,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:33,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:33,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:33,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:33,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:33,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:33,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:33,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:33,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:33,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:33,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:08:33,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965863959] [2020-10-13 05:08:33,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:33,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:08:33,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589324816] [2020-10-13 05:08:33,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:08:33,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:33,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:08:33,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:08:33,604 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 34 states. [2020-10-13 05:08:34,505 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-13 05:08:37,377 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-13 05:08:37,542 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-13 05:08:37,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:37,976 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2020-10-13 05:08:37,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 05:08:37,977 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 53 [2020-10-13 05:08:37,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:37,979 INFO L225 Difference]: With dead ends: 99 [2020-10-13 05:08:37,979 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 05:08:37,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=452, Invalid=3970, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 05:08:37,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 05:08:37,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2020-10-13 05:08:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 05:08:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-10-13 05:08:37,992 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 53 [2020-10-13 05:08:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:37,992 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-10-13 05:08:37,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:08:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-10-13 05:08:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 05:08:37,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:37,993 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:37,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:08:37,994 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:37,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:37,994 INFO L82 PathProgramCache]: Analyzing trace with hash 526443745, now seen corresponding path program 5 times [2020-10-13 05:08:37,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:37,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364094817] [2020-10-13 05:08:37,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:38,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:39,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:43,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:43,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 05:08:43,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:08:43,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:08:43,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:43,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:08:43,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:08:43,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:08:43,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:43,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:43,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:43,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:43,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:43,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:43,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:43,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:43,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:43,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:43,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:43,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:43,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:43,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:43,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:43,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:43,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:43,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:43,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:43,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:43,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:43,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:43,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:08:43,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364094817] [2020-10-13 05:08:43,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:43,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:08:43,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16570547] [2020-10-13 05:08:43,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:08:43,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:43,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:08:43,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:08:43,086 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 10 states. [2020-10-13 05:08:43,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:43,443 INFO L93 Difference]: Finished difference Result 157 states and 178 transitions. [2020-10-13 05:08:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:08:43,451 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-13 05:08:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:43,452 INFO L225 Difference]: With dead ends: 157 [2020-10-13 05:08:43,452 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 05:08:43,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:08:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 05:08:43,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2020-10-13 05:08:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 05:08:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2020-10-13 05:08:43,467 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 55 [2020-10-13 05:08:43,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:43,468 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2020-10-13 05:08:43,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:08:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2020-10-13 05:08:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 05:08:43,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:43,469 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:43,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:08:43,470 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:43,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:43,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1397224415, now seen corresponding path program 6 times [2020-10-13 05:08:43,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:43,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874512904] [2020-10-13 05:08:43,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:43,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:43,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:43,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:43,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:44,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:48,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:48,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 05:08:48,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:08:48,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:08:48,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:48,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:08:48,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:48,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:08:48,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:48,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:48,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:48,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:48,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:48,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:48,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:48,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:48,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:48,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:48,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:48,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:48,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:48,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:48,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:48,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:48,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:48,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:48,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:48,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:48,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:48,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:48,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:08:48,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874512904] [2020-10-13 05:08:48,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:48,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:08:48,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923126411] [2020-10-13 05:08:48,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:08:48,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:48,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:08:48,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:08:48,606 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 10 states. [2020-10-13 05:08:48,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:48,972 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2020-10-13 05:08:48,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:08:48,972 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-13 05:08:48,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:48,973 INFO L225 Difference]: With dead ends: 96 [2020-10-13 05:08:48,974 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 05:08:48,975 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 05:08:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 05:08:48,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-13 05:08:48,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 05:08:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-13 05:08:48,984 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 55 [2020-10-13 05:08:48,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:48,984 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-13 05:08:48,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:08:48,984 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-13 05:08:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:08:48,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:48,986 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:48,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:08:48,986 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:48,986 INFO L82 PathProgramCache]: Analyzing trace with hash 739017131, now seen corresponding path program 7 times [2020-10-13 05:08:48,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:48,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738089393] [2020-10-13 05:08:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:49,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:49,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:50,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:51,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:53,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:54,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:54,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 05:08:54,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:08:54,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:08:54,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:54,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 05:08:54,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:54,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:08:54,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:54,616 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-13 05:08:54,758 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-13 05:08:54,891 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-13 05:08:55,050 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-13 05:08:55,201 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-13 05:08:55,344 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-13 05:08:55,550 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-13 05:08:55,697 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2020-10-13 05:08:55,858 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2020-10-13 05:08:56,150 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-13 05:08:56,308 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-13 05:08:56,496 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2020-10-13 05:08:56,680 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-10-13 05:08:56,873 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2020-10-13 05:08:57,024 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-13 05:08:57,229 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-10-13 05:08:57,404 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2020-10-13 05:08:59,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:59,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:59,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:59,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:59,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:59,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:59,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:59,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:59,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:59,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:59,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:59,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:59,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:59,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:59,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:59,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:59,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:59,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:59,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:59,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:59,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:59,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:59,543 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 05:08:59,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738089393] [2020-10-13 05:08:59,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:59,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 05:08:59,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383374695] [2020-10-13 05:08:59,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 05:08:59,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:59,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 05:08:59,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:08:59,546 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 46 states. [2020-10-13 05:09:00,684 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-10-13 05:09:00,959 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-13 05:09:01,242 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 62 [2020-10-13 05:09:01,636 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-13 05:09:01,833 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2020-10-13 05:09:02,050 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2020-10-13 05:09:02,300 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 57 [2020-10-13 05:09:02,762 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-10-13 05:09:02,933 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-13 05:09:03,183 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-13 05:09:03,529 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-13 05:09:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:07,885 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2020-10-13 05:09:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 05:09:07,885 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 65 [2020-10-13 05:09:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:07,887 INFO L225 Difference]: With dead ends: 117 [2020-10-13 05:09:07,887 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 05:09:07,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=812, Invalid=7744, Unknown=0, NotChecked=0, Total=8556 [2020-10-13 05:09:07,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 05:09:07,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2020-10-13 05:09:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 05:09:07,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2020-10-13 05:09:07,904 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 65 [2020-10-13 05:09:07,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:07,904 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2020-10-13 05:09:07,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 05:09:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2020-10-13 05:09:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 05:09:07,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:07,906 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:09:07,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:09:07,906 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:07,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:07,907 INFO L82 PathProgramCache]: Analyzing trace with hash -116183123, now seen corresponding path program 8 times [2020-10-13 05:09:07,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:07,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794111016] [2020-10-13 05:09:07,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:07,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:07,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:07,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:08,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:12,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:12,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 05:09:12,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:09:12,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:09:12,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:12,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:09:12,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:09:12,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:09:12,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:13,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:13,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:13,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:13,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:13,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:13,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:13,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:13,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:13,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:13,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:13,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:13,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:13,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:13,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:13,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:13,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:13,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:09:13,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:13,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:13,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:13,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:13,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:09:13,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794111016] [2020-10-13 05:09:13,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:13,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:09:13,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724891985] [2020-10-13 05:09:13,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:09:13,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:13,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:09:13,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:09:13,017 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand 12 states. [2020-10-13 05:09:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:13,511 INFO L93 Difference]: Finished difference Result 215 states and 239 transitions. [2020-10-13 05:09:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:09:13,512 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-13 05:09:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:13,514 INFO L225 Difference]: With dead ends: 215 [2020-10-13 05:09:13,514 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 05:09:13,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 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 05:09:13,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 05:09:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 100. [2020-10-13 05:09:13,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 05:09:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2020-10-13 05:09:13,527 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 67 [2020-10-13 05:09:13,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:13,527 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2020-10-13 05:09:13,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:09:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2020-10-13 05:09:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 05:09:13,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:13,529 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:09:13,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:09:13,529 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:13,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:13,530 INFO L82 PathProgramCache]: Analyzing trace with hash -715314193, now seen corresponding path program 9 times [2020-10-13 05:09:13,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:13,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208198468] [2020-10-13 05:09:13,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:13,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:13,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:13,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:13,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:17,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:17,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:18,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:18,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:09:18,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:09:18,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:09:18,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:18,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:09:18,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:09:18,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:09:18,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:18,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:18,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:18,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:18,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:18,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:18,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:18,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:18,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:18,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:18,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:18,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:18,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:18,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:18,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:18,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:18,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:18,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:18,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:18,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:18,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:18,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:18,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-13 05:09:18,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208198468] [2020-10-13 05:09:18,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:18,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:09:18,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713824936] [2020-10-13 05:09:18,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:09:18,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:18,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:09:18,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:09:18,707 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 12 states. [2020-10-13 05:09:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:19,433 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-10-13 05:09:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:09:19,434 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-13 05:09:19,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:19,435 INFO L225 Difference]: With dead ends: 108 [2020-10-13 05:09:19,436 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 05:09:19,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:09:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 05:09:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-13 05:09:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 05:09:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-13 05:09:19,462 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 69 [2020-10-13 05:09:19,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:19,465 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-13 05:09:19,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:09:19,466 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-13 05:09:19,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 05:09:19,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:19,478 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:09:19,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:09:19,479 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:19,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1709261449, now seen corresponding path program 10 times [2020-10-13 05:09:19,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:19,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51873691] [2020-10-13 05:09:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:19,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:20,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:22,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:23,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:24,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:24,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 05:09:24,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:09:24,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5108 [2020-10-13 05:09:24,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:24,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-13 05:09:24,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:09:24,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 05:09:24,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:25,388 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-13 05:09:25,579 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-13 05:09:25,780 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-13 05:09:25,999 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-13 05:09:26,167 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-13 05:09:26,349 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-13 05:09:26,679 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-13 05:09:27,105 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-13 05:09:31,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:31,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:31,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:31,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:31,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:31,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:31,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:31,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:31,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:31,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:31,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:31,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:31,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:31,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:31,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:31,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:31,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:09:31,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:31,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:31,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:31,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:31,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:09:31,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51873691] [2020-10-13 05:09:31,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:31,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-13 05:09:31,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763577835] [2020-10-13 05:09:31,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-13 05:09:31,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:31,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-13 05:09:31,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2861, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 05:09:31,621 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 56 states. [2020-10-13 05:09:32,632 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2020-10-13 05:09:33,014 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2020-10-13 05:09:33,353 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-10-13 05:09:33,623 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-13 05:09:34,043 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-10-13 05:09:34,354 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 53 [2020-10-13 05:09:34,700 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2020-10-13 05:09:34,937 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-13 05:09:35,186 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-13 05:09:41,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:41,520 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2020-10-13 05:09:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 05:09:41,521 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 77 [2020-10-13 05:09:41,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:41,522 INFO L225 Difference]: With dead ends: 129 [2020-10-13 05:09:41,522 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 05:09:41,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=661, Invalid=8651, Unknown=0, NotChecked=0, Total=9312 [2020-10-13 05:09:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 05:09:41,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 113. [2020-10-13 05:09:41,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 05:09:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2020-10-13 05:09:41,539 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 77 [2020-10-13 05:09:41,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:41,539 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2020-10-13 05:09:41,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-13 05:09:41,539 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2020-10-13 05:09:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 05:09:41,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:41,541 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:09:41,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:09:41,541 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:41,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:41,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1248536455, now seen corresponding path program 11 times [2020-10-13 05:09:41,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:41,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79481801] [2020-10-13 05:09:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:41,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:41,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:41,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:41,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:46,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:46,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 05:09:46,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:09:46,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 05:09:46,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:46,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:09:46,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 05:09:46,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:09:46,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:46,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:46,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:46,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:46,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:46,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:46,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:46,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:46,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:46,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:46,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:46,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:46,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:46,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:46,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:46,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:46,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:46,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:46,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:46,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:46,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:46,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:46,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 05:09:46,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79481801] [2020-10-13 05:09:46,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:46,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:09:46,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775755015] [2020-10-13 05:09:46,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:09:46,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:46,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:09:46,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:09:46,756 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 14 states. [2020-10-13 05:09:47,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:47,453 INFO L93 Difference]: Finished difference Result 255 states and 279 transitions. [2020-10-13 05:09:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:09:47,454 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2020-10-13 05:09:47,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:47,455 INFO L225 Difference]: With dead ends: 255 [2020-10-13 05:09:47,456 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 05:09:47,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:09:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 05:09:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 118. [2020-10-13 05:09:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 05:09:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2020-10-13 05:09:47,469 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 79 [2020-10-13 05:09:47,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:47,469 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2020-10-13 05:09:47,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:09:47,469 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2020-10-13 05:09:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 05:09:47,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:47,471 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:09:47,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:09:47,471 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:47,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:47,471 INFO L82 PathProgramCache]: Analyzing trace with hash -666160709, now seen corresponding path program 12 times [2020-10-13 05:09:47,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:47,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072776771] [2020-10-13 05:09:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:47,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:47,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:47,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:47,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:49,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:52,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:52,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 05:09:52,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:09:52,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 05:09:52,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:52,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:09:52,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:09:52,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:09:52,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:52,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:52,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:52,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:52,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:52,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:52,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:52,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:52,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:52,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:52,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:52,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:52,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:52,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:52,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:52,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:52,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:52,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:52,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:52,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:52,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:52,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:52,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-13 05:09:52,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072776771] [2020-10-13 05:09:52,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:52,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:09:52,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962655626] [2020-10-13 05:09:52,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:09:52,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:52,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:09:52,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:09:52,659 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand 14 states. [2020-10-13 05:09:53,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:53,418 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-10-13 05:09:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:09:53,420 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-10-13 05:09:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:53,421 INFO L225 Difference]: With dead ends: 126 [2020-10-13 05:09:53,421 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 05:09:53,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:09:53,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 05:09:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-13 05:09:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 05:09:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-10-13 05:09:53,431 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 81 [2020-10-13 05:09:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:53,431 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-10-13 05:09:53,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:09:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-10-13 05:09:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 05:09:53,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:53,432 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:09:53,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:09:53,432 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:53,433 INFO L82 PathProgramCache]: Analyzing trace with hash -682436797, now seen corresponding path program 13 times [2020-10-13 05:09:53,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:53,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918928944] [2020-10-13 05:09:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:53,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:55,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:58,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:58,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 05:09:58,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:09:58,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 05:09:58,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:58,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-13 05:09:58,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:09:58,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 05:09:58,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:59,478 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-13 05:09:59,758 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-13 05:09:59,909 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-13 05:10:00,107 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-13 05:10:00,263 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-13 05:10:00,473 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-13 05:10:00,641 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-13 05:10:00,867 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-10-13 05:10:01,030 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-13 05:10:01,201 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-13 05:10:01,365 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-13 05:10:02,654 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2020-10-13 05:10:08,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:08,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:08,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:08,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:08,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:08,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:08,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:08,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:08,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:08,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:08,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:08,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:08,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:08,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:08,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:08,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:08,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:08,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:08,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:08,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:08,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:08,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:10:08,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918928944] [2020-10-13 05:10:08,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:08,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-13 05:10:08,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558680217] [2020-10-13 05:10:08,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-13 05:10:08,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:08,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-13 05:10:08,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=4046, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 05:10:08,373 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 66 states. [2020-10-13 05:10:10,857 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-13 05:10:11,836 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-13 05:10:12,169 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-13 05:10:15,425 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-13 05:10:16,392 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-13 05:10:21,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:21,706 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2020-10-13 05:10:21,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-13 05:10:21,708 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 89 [2020-10-13 05:10:21,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:21,710 INFO L225 Difference]: With dead ends: 152 [2020-10-13 05:10:21,710 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 05:10:21,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=622, Invalid=12260, Unknown=0, NotChecked=0, Total=12882 [2020-10-13 05:10:21,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 05:10:21,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2020-10-13 05:10:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 05:10:21,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 140 transitions. [2020-10-13 05:10:21,728 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 140 transitions. Word has length 89 [2020-10-13 05:10:21,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:21,728 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 140 transitions. [2020-10-13 05:10:21,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-13 05:10:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 140 transitions. [2020-10-13 05:10:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 05:10:21,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:21,730 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:10:21,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:10:21,730 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:21,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:21,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1411702597, now seen corresponding path program 14 times [2020-10-13 05:10:21,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:21,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542614685] [2020-10-13 05:10:21,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:21,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:21,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:21,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:22,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:26,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:26,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 05:10:26,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:10:26,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 05:10:26,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:26,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:10:26,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 05:10:26,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:10:26,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:26,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:26,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:26,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:26,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:26,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:26,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:26,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:26,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:26,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:26,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:26,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:26,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:26,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:26,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:26,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:26,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:26,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:26,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:26,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:26,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:26,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:26,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 05:10:26,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542614685] [2020-10-13 05:10:26,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:26,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:10:26,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467072383] [2020-10-13 05:10:26,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:10:26,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:26,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:10:26,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:10:26,997 INFO L87 Difference]: Start difference. First operand 131 states and 140 transitions. Second operand 16 states. [2020-10-13 05:10:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:27,895 INFO L93 Difference]: Finished difference Result 295 states and 319 transitions. [2020-10-13 05:10:27,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:10:27,896 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2020-10-13 05:10:27,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:27,898 INFO L225 Difference]: With dead ends: 295 [2020-10-13 05:10:27,898 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 05:10:27,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:10:27,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 05:10:27,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2020-10-13 05:10:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 05:10:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 144 transitions. [2020-10-13 05:10:27,912 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 144 transitions. Word has length 91 [2020-10-13 05:10:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:27,913 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 144 transitions. [2020-10-13 05:10:27,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:10:27,913 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 144 transitions. [2020-10-13 05:10:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 05:10:27,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:27,914 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:10:27,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:10:27,914 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:27,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:27,915 INFO L82 PathProgramCache]: Analyzing trace with hash 535303559, now seen corresponding path program 15 times [2020-10-13 05:10:27,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:27,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497933190] [2020-10-13 05:10:27,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:27,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:27,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:27,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:28,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:28,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:32,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:32,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 05:10:32,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:10:32,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:10:32,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:32,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:10:32,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 05:10:32,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 05:10:32,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:33,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:33,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:33,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:33,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:33,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:33,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:33,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:33,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:33,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:33,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:33,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:33,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:33,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:33,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:10:33,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:33,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:33,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:33,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:33,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-13 05:10:33,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497933190] [2020-10-13 05:10:33,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:33,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:10:33,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84937844] [2020-10-13 05:10:33,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:10:33,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:33,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:10:33,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:10:33,178 INFO L87 Difference]: Start difference. First operand 136 states and 144 transitions. Second operand 16 states. [2020-10-13 05:10:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:34,170 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2020-10-13 05:10:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:10:34,171 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 93 [2020-10-13 05:10:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:34,173 INFO L225 Difference]: With dead ends: 144 [2020-10-13 05:10:34,173 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 05:10:34,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:10:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 05:10:34,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-13 05:10:34,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 05:10:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-10-13 05:10:34,185 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 93 [2020-10-13 05:10:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:34,186 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-10-13 05:10:34,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:10:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-10-13 05:10:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 05:10:34,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:34,187 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:10:34,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:10:34,187 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:34,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:34,188 INFO L82 PathProgramCache]: Analyzing trace with hash -366489841, now seen corresponding path program 16 times [2020-10-13 05:10:34,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:34,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276881545] [2020-10-13 05:10:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:34,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:37,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:40,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:40,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 05:10:40,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:10:40,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6663 [2020-10-13 05:10:40,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:40,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 79 [2020-10-13 05:10:40,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:10:40,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 05:10:40,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:41,983 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2020-10-13 05:10:42,204 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2020-10-13 05:10:42,429 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2020-10-13 05:10:42,720 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-10-13 05:10:43,045 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-10-13 05:10:43,431 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-10-13 05:10:43,770 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2020-10-13 05:10:44,255 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 71 [2020-10-13 05:10:44,608 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 54 [2020-10-13 05:10:45,062 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 76 [2020-10-13 05:10:45,434 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2020-10-13 05:10:45,827 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2020-10-13 05:10:46,175 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2020-10-13 05:10:46,629 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 68 [2020-10-13 05:10:47,018 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-13 05:10:47,403 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2020-10-13 05:10:47,776 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2020-10-13 05:10:48,186 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2020-10-13 05:10:48,532 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-10-13 05:10:48,845 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2020-10-13 05:10:49,100 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2020-10-13 05:10:49,420 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2020-10-13 05:10:49,727 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2020-10-13 05:10:50,144 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2020-10-13 05:10:50,529 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 43 [2020-10-13 05:10:50,853 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2020-10-13 05:10:51,148 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 47 [2020-10-13 05:10:51,574 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2020-10-13 05:10:51,999 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2020-10-13 05:10:52,478 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2020-10-13 05:10:52,905 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 58 [2020-10-13 05:10:53,442 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 58 [2020-10-13 05:10:53,872 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2020-10-13 05:10:54,254 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2020-10-13 05:10:54,572 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-13 05:10:54,973 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2020-10-13 05:10:55,347 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2020-10-13 05:10:55,797 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2020-10-13 05:10:56,184 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2020-10-13 05:10:56,625 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 56 [2020-10-13 05:10:57,004 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-13 05:10:57,387 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2020-10-13 05:10:57,727 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-10-13 05:10:58,096 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2020-10-13 05:10:58,390 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-13 05:10:58,675 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 32 [2020-10-13 05:10:59,243 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2020-10-13 05:10:59,580 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 32 [2020-10-13 05:10:59,932 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 32 [2020-10-13 05:11:00,311 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2020-10-13 05:11:00,748 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2020-10-13 05:11:01,149 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-10-13 05:11:01,593 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2020-10-13 05:11:02,023 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-13 05:11:02,484 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2020-10-13 05:11:02,910 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2020-10-13 05:11:03,333 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-13 05:11:03,741 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-13 05:11:04,213 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-10-13 05:11:04,625 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-13 05:11:05,046 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-13 05:11:05,600 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-13 05:11:06,101 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-13 05:11:06,551 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-13 05:11:06,924 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-13 05:11:07,279 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-13 05:11:07,704 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2020-10-13 05:11:09,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:09,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:09,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:09,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:09,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:09,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:09,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:09,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:09,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:09,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:09,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:09,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:09,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:09,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:09,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:09,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:09,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:09,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 26 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:11:09,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276881545] [2020-10-13 05:11:09,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:09,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-13 05:11:09,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690282936] [2020-10-13 05:11:09,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-13 05:11:09,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:09,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-13 05:11:09,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=6136, Unknown=0, NotChecked=0, Total=6480 [2020-10-13 05:11:09,336 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 81 states. [2020-10-13 05:11:09,695 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 5 [2020-10-13 05:11:10,189 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 17 [2020-10-13 05:11:11,129 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-13 05:11:11,857 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2020-10-13 05:11:12,466 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-10-13 05:11:13,089 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 100 [2020-10-13 05:11:13,751 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2020-10-13 05:11:14,440 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 62 [2020-10-13 05:11:15,063 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2020-10-13 05:11:15,731 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2020-10-13 05:11:17,089 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 99 [2020-10-13 05:11:17,764 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 72 [2020-10-13 05:11:18,449 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 92 [2020-10-13 05:11:18,973 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-10-13 05:11:19,647 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 113 [2020-10-13 05:11:20,218 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2020-10-13 05:11:20,833 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 93 [2020-10-13 05:11:21,397 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2020-10-13 05:11:22,061 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-13 05:11:22,450 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-13 05:11:22,814 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-13 05:11:23,571 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-10-13 05:11:24,648 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-10-13 05:11:25,024 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-13 05:11:25,471 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2020-10-13 05:11:25,804 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-13 05:11:26,322 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2020-10-13 05:11:26,765 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-13 05:11:27,295 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 94 [2020-10-13 05:11:27,789 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-13 05:11:28,336 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2020-10-13 05:11:28,700 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-13 05:11:29,300 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2020-10-13 05:11:29,945 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-10-13 05:11:30,359 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-13 05:11:31,097 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 98 [2020-10-13 05:11:31,636 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2020-10-13 05:11:32,130 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-13 05:11:32,636 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2020-10-13 05:11:33,243 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-10-13 05:11:33,801 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-10-13 05:11:34,333 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2020-10-13 05:11:34,771 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-13 05:11:35,135 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-13 05:11:36,312 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2020-10-13 05:11:36,821 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 42 [2020-10-13 05:11:37,363 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2020-10-13 05:11:37,944 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-10-13 05:11:38,598 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2020-10-13 05:11:39,282 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-13 05:11:39,905 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-13 05:11:40,460 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 67 [2020-10-13 05:11:40,838 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-13 05:11:42,306 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-13 05:11:42,832 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-13 05:11:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:43,447 INFO L93 Difference]: Finished difference Result 177 states and 187 transitions. [2020-10-13 05:11:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-13 05:11:43,449 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 101 [2020-10-13 05:11:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:43,451 INFO L225 Difference]: With dead ends: 177 [2020-10-13 05:11:43,451 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 05:11:43,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 51.8s TimeCoverageRelationStatistics Valid=1132, Invalid=19748, Unknown=0, NotChecked=0, Total=20880 [2020-10-13 05:11:43,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 05:11:43,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2020-10-13 05:11:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 05:11:43,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2020-10-13 05:11:43,469 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 101 [2020-10-13 05:11:43,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:43,470 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2020-10-13 05:11:43,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-13 05:11:43,470 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2020-10-13 05:11:43,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 05:11:43,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:43,471 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:43,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:11:43,472 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:43,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:43,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1333640175, now seen corresponding path program 17 times [2020-10-13 05:11:43,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:43,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551197079] [2020-10-13 05:11:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:43,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:43,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:43,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:43,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:48,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:48,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 05:11:48,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:11:48,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:11:48,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:48,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:11:48,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 05:11:48,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:11:48,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:48,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:48,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:48,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:48,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:48,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:48,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:48,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:48,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:48,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:48,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:48,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:48,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:48,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:48,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:48,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:48,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:48,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:11:48,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:48,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 05:11:48,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551197079] [2020-10-13 05:11:48,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:48,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:11:48,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129095514] [2020-10-13 05:11:48,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:11:48,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:48,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:11:48,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:11:48,770 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand 18 states. [2020-10-13 05:11:50,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:50,007 INFO L93 Difference]: Finished difference Result 274 states and 293 transitions. [2020-10-13 05:11:50,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:11:50,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 103 [2020-10-13 05:11:50,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:50,011 INFO L225 Difference]: With dead ends: 274 [2020-10-13 05:11:50,011 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 05:11:50,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:11:50,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 05:11:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 154. [2020-10-13 05:11:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 05:11:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 162 transitions. [2020-10-13 05:11:50,027 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 162 transitions. Word has length 103 [2020-10-13 05:11:50,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:50,028 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 162 transitions. [2020-10-13 05:11:50,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:11:50,028 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 162 transitions. [2020-10-13 05:11:50,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 05:11:50,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:50,029 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:50,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:11:50,029 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:50,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:50,030 INFO L82 PathProgramCache]: Analyzing trace with hash 271767379, now seen corresponding path program 18 times [2020-10-13 05:11:50,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:50,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386988506] [2020-10-13 05:11:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:50,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:50,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:50,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:50,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking...