/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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-cav19/array_init_var_plus_ind3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:10:41,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:10:41,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:10:42,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:10:42,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:10:42,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:10:42,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:10:42,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:10:42,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:10:42,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:10:42,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:10:42,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:10:42,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:10:42,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:10:42,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:10:42,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:10:42,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:10:42,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:10:42,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:10:42,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:10:42,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:10:42,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:10:42,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:10:42,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:10:42,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:10:42,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:10:42,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:10:42,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:10:42,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:10:42,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:10:42,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:10:42,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:10:42,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:10:42,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:10:42,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:10:42,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:10:42,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:10:42,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:10:42,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:10:42,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:10:42,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:10:42,085 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 23:10:42,108 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:10:42,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:10:42,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:10:42,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:10:42,110 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:10:42,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:10:42,110 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:10:42,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:10:42,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:10:42,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:10:42,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:10:42,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:10:42,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:10:42,111 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:10:42,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:10:42,112 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:10:42,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:10:42,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:10:42,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:10:42,113 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:10:42,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:10:42,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:10:42,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:10:42,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:10:42,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:10:42,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:10:42,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:10:42,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:10:42,114 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:10:42,115 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:10:42,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:10:42,435 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:10:42,441 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:10:42,442 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:10:42,442 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:10:42,443 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind3.c [2020-10-13 23:10:42,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa229174f/ab58b9ed6b22461080056f8f6618d8c2/FLAG706e39cbf [2020-10-13 23:10:42,928 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:10:42,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_init_var_plus_ind3.c [2020-10-13 23:10:42,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa229174f/ab58b9ed6b22461080056f8f6618d8c2/FLAG706e39cbf [2020-10-13 23:10:43,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa229174f/ab58b9ed6b22461080056f8f6618d8c2 [2020-10-13 23:10:43,331 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:10:43,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:10:43,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:10:43,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:10:43,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:10:43,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@144c4f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43, skipping insertion in model container [2020-10-13 23:10:43,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:10:43,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:10:43,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:10:43,544 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:10:43,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:10:43,601 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:10:43,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43 WrapperNode [2020-10-13 23:10:43,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:10:43,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:10:43,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:10:43,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:10:43,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:10:43,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:10:43,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:10:43,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:10:43,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (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 23:10:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:10:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:10:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:10:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:10:43,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:10:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:10:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:10:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:10:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:10:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:10:43,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:10:43,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:10:43,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:10:43,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:10:43,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:10:43,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:10:43,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:10:44,090 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:10:44,090 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 23:10:44,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:10:44 BoogieIcfgContainer [2020-10-13 23:10:44,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:10:44,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:10:44,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:10:44,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:10:44,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:10:43" (1/3) ... [2020-10-13 23:10:44,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf057dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:10:44, skipping insertion in model container [2020-10-13 23:10:44,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (2/3) ... [2020-10-13 23:10:44,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf057dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:10:44, skipping insertion in model container [2020-10-13 23:10:44,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:10:44" (3/3) ... [2020-10-13 23:10:44,115 INFO L109 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind3.c [2020-10-13 23:10:44,126 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:10:44,134 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:10:44,150 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:10:44,180 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:10:44,180 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:10:44,181 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:10:44,181 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:10:44,181 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:10:44,181 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:10:44,181 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:10:44,181 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:10:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-13 23:10:44,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 23:10:44,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:44,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:44,210 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:44,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:44,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1594784639, now seen corresponding path program 1 times [2020-10-13 23:10:44,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:44,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841424861] [2020-10-13 23:10:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:44,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:44,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:44,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:44,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 23:10:44,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:10:44,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-13 23:10:44,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:44,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:44,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:10:44,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:10:44,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:10:44,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:10:44,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:44,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:44,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:44,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:44,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:44,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 23:10:44,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:44,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:44,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:44,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:44,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:10:44,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:44,769 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 23:10:44,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841424861] [2020-10-13 23:10:44,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:10:44,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:10:44,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286892824] [2020-10-13 23:10:44,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:10:44,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:44,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:10:44,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:10:44,800 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-10-13 23:10:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:45,028 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-10-13 23:10:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:10:45,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-13 23:10:45,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:45,041 INFO L225 Difference]: With dead ends: 52 [2020-10-13 23:10:45,041 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 23:10:45,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:10:45,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 23:10:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2020-10-13 23:10:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 23:10:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 23:10:45,090 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2020-10-13 23:10:45,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:45,091 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 23:10:45,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:10:45,091 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 23:10:45,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 23:10:45,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:45,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:45,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:10:45,093 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1672402483, now seen corresponding path program 1 times [2020-10-13 23:10:45,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:45,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475891073] [2020-10-13 23:10:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:45,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:45,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 23:10:45,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:45,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-13 23:10:45,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:45,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:45,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:10:45,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:45,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:10:45,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:45,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:45,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:45,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:45,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:45,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:10:45,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:45,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:45,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:45,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:45,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:45,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:45,282 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 23:10:45,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475891073] [2020-10-13 23:10:45,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:10:45,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:10:45,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749745799] [2020-10-13 23:10:45,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:10:45,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:45,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:10:45,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:10:45,286 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-13 23:10:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:45,366 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-10-13 23:10:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:10:45,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-13 23:10:45,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:45,368 INFO L225 Difference]: With dead ends: 35 [2020-10-13 23:10:45,368 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 23:10:45,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:10:45,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 23:10:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-13 23:10:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 23:10:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-13 23:10:45,376 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2020-10-13 23:10:45,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:45,377 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-13 23:10:45,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:10:45,377 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-13 23:10:45,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:10:45,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:45,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:45,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:10:45,379 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:45,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:45,379 INFO L82 PathProgramCache]: Analyzing trace with hash -973616762, now seen corresponding path program 1 times [2020-10-13 23:10:45,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:45,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347020945] [2020-10-13 23:10:45,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:45,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:45,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:10:45,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:10:45,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-13 23:10:45,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:45,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:45,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:10:45,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:10:45,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:10:45,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:45,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:45,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:45,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:45,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:45,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:10:45,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:45,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:45,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:45,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:45,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:10:45,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:45,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347020945] [2020-10-13 23:10:45,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:45,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:10:45,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655293554] [2020-10-13 23:10:45,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:10:45,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:45,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:10:45,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:10:45,683 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-10-13 23:10:45,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:45,808 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-10-13 23:10:45,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:10:45,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-13 23:10:45,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:45,810 INFO L225 Difference]: With dead ends: 42 [2020-10-13 23:10:45,810 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 23:10:45,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:10:45,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 23:10:45,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2020-10-13 23:10:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 23:10:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-13 23:10:45,818 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-10-13 23:10:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:45,819 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-13 23:10:45,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:10:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-13 23:10:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:10:45,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:45,820 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:45,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:10:45,821 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:45,821 INFO L82 PathProgramCache]: Analyzing trace with hash 311532710, now seen corresponding path program 1 times [2020-10-13 23:10:45,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:45,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12658153] [2020-10-13 23:10:45,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:45,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:45,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:10:45,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:45,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-13 23:10:45,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:45,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:45,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:10:45,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:45,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:10:45,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:45,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:45,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:45,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:45,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:45,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:10:45,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:45,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:45,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:45,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:45,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:45,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:45,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12658153] [2020-10-13 23:10:45,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:45,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:10:45,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526048864] [2020-10-13 23:10:45,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:10:45,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:45,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:10:45,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:10:45,958 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-13 23:10:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:46,043 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-13 23:10:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:10:46,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-13 23:10:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:46,045 INFO L225 Difference]: With dead ends: 38 [2020-10-13 23:10:46,045 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 23:10:46,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:10:46,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 23:10:46,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-13 23:10:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 23:10:46,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-13 23:10:46,052 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-10-13 23:10:46,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:46,052 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-13 23:10:46,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:10:46,053 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-13 23:10:46,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:10:46,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:46,054 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:46,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:10:46,054 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:46,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1377375713, now seen corresponding path program 2 times [2020-10-13 23:10:46,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:46,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301723972] [2020-10-13 23:10:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:46,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:46,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:46,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:46,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 23:10:46,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:10:46,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-13 23:10:46,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:46,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:46,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:10:46,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:10:46,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:10:46,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:10:46,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:46,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:46,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:46,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:46,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:46,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:10:46,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:46,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:46,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:46,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:46,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:10:46,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:46,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301723972] [2020-10-13 23:10:46,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:46,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:10:46,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947852287] [2020-10-13 23:10:46,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:10:46,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:46,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:10:46,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:10:46,410 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-10-13 23:10:46,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:46,569 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-13 23:10:46,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:10:46,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-13 23:10:46,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:46,571 INFO L225 Difference]: With dead ends: 45 [2020-10-13 23:10:46,571 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:10:46,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:10:46,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:10:46,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2020-10-13 23:10:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 23:10:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-13 23:10:46,578 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-10-13 23:10:46,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:46,579 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-13 23:10:46,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:10:46,579 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-13 23:10:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:10:46,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:46,580 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:46,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:10:46,581 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash 679907117, now seen corresponding path program 2 times [2020-10-13 23:10:46,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:46,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377686060] [2020-10-13 23:10:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:46,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:46,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:46,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:10:46,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:46,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-13 23:10:46,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:46,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:10:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:10:46,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:46,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:46,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:46,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:46,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:46,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:46,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:10:46,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:46,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:46,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:46,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:46,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:46,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:46,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377686060] [2020-10-13 23:10:46,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:46,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:10:46,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985940545] [2020-10-13 23:10:46,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:10:46,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:46,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:10:46,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:10:46,707 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-10-13 23:10:46,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:46,795 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-13 23:10:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:10:46,796 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-13 23:10:46,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:46,797 INFO L225 Difference]: With dead ends: 41 [2020-10-13 23:10:46,797 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 23:10:46,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:10:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 23:10:46,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-13 23:10:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:10:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 23:10:46,803 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-10-13 23:10:46,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:46,804 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 23:10:46,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:10:46,804 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 23:10:46,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:10:46,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:46,805 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:46,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:10:46,805 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:46,806 INFO L82 PathProgramCache]: Analyzing trace with hash 443111142, now seen corresponding path program 3 times [2020-10-13 23:10:46,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:46,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469935322] [2020-10-13 23:10:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:46,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:46,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:47,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:47,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 23:10:47,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:10:47,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-13 23:10:47,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:47,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:47,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:10:47,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:10:47,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:10:47,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:47,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:47,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:47,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:47,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:47,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:47,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:10:47,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:47,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:47,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:47,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:47,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:10:47,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:47,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469935322] [2020-10-13 23:10:47,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:47,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:10:47,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938736097] [2020-10-13 23:10:47,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:10:47,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:47,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:10:47,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:10:47,149 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-13 23:10:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:47,315 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-10-13 23:10:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:10:47,316 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-13 23:10:47,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:47,317 INFO L225 Difference]: With dead ends: 48 [2020-10-13 23:10:47,317 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 23:10:47,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:10:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 23:10:47,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-10-13 23:10:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 23:10:47,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-13 23:10:47,324 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 22 [2020-10-13 23:10:47,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:47,325 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-13 23:10:47,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:10:47,325 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-13 23:10:47,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:10:47,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:47,326 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:47,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:10:47,327 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:47,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1280424774, now seen corresponding path program 3 times [2020-10-13 23:10:47,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:47,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315482804] [2020-10-13 23:10:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:47,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:47,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:47,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:10:47,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:47,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-13 23:10:47,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:47,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:47,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:10:47,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:47,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:10:47,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:10:47,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:47,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:47,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:47,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:47,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:47,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:10:47,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:47,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:47,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:47,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:47,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:47,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:47,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315482804] [2020-10-13 23:10:47,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:47,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:10:47,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21359551] [2020-10-13 23:10:47,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:10:47,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:47,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:10:47,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:10:47,479 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-13 23:10:47,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:47,571 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-13 23:10:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:10:47,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-13 23:10:47,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:47,573 INFO L225 Difference]: With dead ends: 44 [2020-10-13 23:10:47,573 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 23:10:47,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:10:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 23:10:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-13 23:10:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:10:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-13 23:10:47,579 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2020-10-13 23:10:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:47,579 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-13 23:10:47,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:10:47,580 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-13 23:10:47,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:10:47,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:47,581 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:47,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:10:47,581 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:47,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:47,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2014961855, now seen corresponding path program 4 times [2020-10-13 23:10:47,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:47,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099677525] [2020-10-13 23:10:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:47,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:47,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:47,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:47,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:10:47,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:10:47,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-13 23:10:47,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:47,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:47,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:10:47,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:10:47,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:10:47,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:10:47,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:47,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:47,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:47,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:47,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:47,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:10:47,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:47,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:47,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:47,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:47,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:10:47,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:47,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099677525] [2020-10-13 23:10:47,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:47,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:10:47,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513863598] [2020-10-13 23:10:47,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:10:47,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:47,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:10:47,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:10:47,985 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 9 states. [2020-10-13 23:10:48,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:48,172 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-13 23:10:48,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:10:48,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-13 23:10:48,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:48,174 INFO L225 Difference]: With dead ends: 51 [2020-10-13 23:10:48,174 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:10:48,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:10:48,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:10:48,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-10-13 23:10:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 23:10:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-13 23:10:48,180 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2020-10-13 23:10:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:48,180 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-13 23:10:48,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:10:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-13 23:10:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:10:48,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:48,182 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:48,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:10:48,182 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:48,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:48,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1531810675, now seen corresponding path program 4 times [2020-10-13 23:10:48,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:48,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085414964] [2020-10-13 23:10:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:48,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:48,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:48,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:10:48,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:48,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-13 23:10:48,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:48,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:48,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:10:48,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:48,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:10:48,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:48,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:48,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:48,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:48,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:48,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:48,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:10:48,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:48,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:48,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:48,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:48,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:48,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:10:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:48,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085414964] [2020-10-13 23:10:48,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:48,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:10:48,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323246897] [2020-10-13 23:10:48,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:10:48,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:48,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:10:48,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:10:48,396 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-10-13 23:10:48,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:48,518 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-13 23:10:48,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:10:48,519 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-13 23:10:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:48,520 INFO L225 Difference]: With dead ends: 47 [2020-10-13 23:10:48,520 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 23:10:48,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:10:48,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 23:10:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-13 23:10:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:10:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-13 23:10:48,526 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-10-13 23:10:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:48,526 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-13 23:10:48,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:10:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-13 23:10:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:10:48,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:48,527 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:48,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:10:48,528 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:48,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:48,528 INFO L82 PathProgramCache]: Analyzing trace with hash 991124550, now seen corresponding path program 5 times [2020-10-13 23:10:48,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:48,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717154601] [2020-10-13 23:10:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:48,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:48,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:49,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:49,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:10:49,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:10:49,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-10-13 23:10:49,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:49,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:49,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:10:49,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:10:49,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:10:49,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:49,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:49,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:49,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:49,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:49,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:49,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:10:49,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:49,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:49,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:49,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:49,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:10:49,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:49,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717154601] [2020-10-13 23:10:49,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:49,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:10:49,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529170819] [2020-10-13 23:10:49,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:10:49,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:10:49,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:10:49,202 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 10 states. [2020-10-13 23:10:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:49,399 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-10-13 23:10:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:10:49,400 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-13 23:10:49,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:49,401 INFO L225 Difference]: With dead ends: 54 [2020-10-13 23:10:49,401 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 23:10:49,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:10:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 23:10:49,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-10-13 23:10:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 23:10:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-13 23:10:49,409 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 28 [2020-10-13 23:10:49,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:49,409 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-13 23:10:49,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:10:49,409 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-13 23:10:49,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:10:49,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:49,410 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:49,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:10:49,411 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:49,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:49,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1088971238, now seen corresponding path program 5 times [2020-10-13 23:10:49,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:49,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371076063] [2020-10-13 23:10:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:49,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:49,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:49,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:10:49,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:49,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-13 23:10:49,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:49,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:49,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:10:49,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:49,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:10:49,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:50,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:50,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:50,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:50,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:50,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:50,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:10:50,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:50,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:50,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:50,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:50,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:50,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:50,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371076063] [2020-10-13 23:10:50,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:50,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:10:50,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877369815] [2020-10-13 23:10:50,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:10:50,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:50,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:10:50,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:10:50,201 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 17 states. [2020-10-13 23:10:50,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:50,653 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-13 23:10:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:10:50,654 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-10-13 23:10:50,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:50,655 INFO L225 Difference]: With dead ends: 52 [2020-10-13 23:10:50,655 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 23:10:50,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:10:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 23:10:50,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-10-13 23:10:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:10:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-13 23:10:50,663 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 29 [2020-10-13 23:10:50,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:50,663 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-13 23:10:50,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:10:50,663 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-13 23:10:50,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:10:50,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:50,664 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:50,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:10:50,665 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:50,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1583259809, now seen corresponding path program 6 times [2020-10-13 23:10:50,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:50,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414990412] [2020-10-13 23:10:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:50,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:50,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:51,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:51,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:10:51,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:10:51,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-13 23:10:51,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:51,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:51,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:10:51,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:10:51,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:10:51,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:51,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:51,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:51,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:51,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:51,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:51,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:10:51,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:51,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:51,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:51,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:51,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:10:51,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:51,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414990412] [2020-10-13 23:10:51,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:51,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:10:51,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769378995] [2020-10-13 23:10:51,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:10:51,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:51,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:10:51,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:10:51,475 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 11 states. [2020-10-13 23:10:51,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:51,851 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-10-13 23:10:51,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:10:51,853 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-13 23:10:51,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:51,856 INFO L225 Difference]: With dead ends: 68 [2020-10-13 23:10:51,856 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 23:10:51,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:10:51,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 23:10:51,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-10-13 23:10:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 23:10:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-13 23:10:51,865 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 31 [2020-10-13 23:10:51,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:51,865 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-13 23:10:51,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:10:51,866 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-13 23:10:51,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:10:51,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:51,867 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:51,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:10:51,867 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:51,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:51,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1407532563, now seen corresponding path program 6 times [2020-10-13 23:10:51,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:51,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802106451] [2020-10-13 23:10:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:51,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:52,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:52,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:10:52,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:52,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-13 23:10:52,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:52,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:52,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:10:52,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:52,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:10:52,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:52,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:52,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:52,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:52,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:52,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:52,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:10:52,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:52,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:52,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:52,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:52,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:52,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:52,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802106451] [2020-10-13 23:10:52,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:52,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:10:52,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276269104] [2020-10-13 23:10:52,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:10:52,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:52,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:10:52,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:10:52,558 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 17 states. [2020-10-13 23:10:52,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:52,996 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-13 23:10:52,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:10:52,997 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-10-13 23:10:52,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:52,998 INFO L225 Difference]: With dead ends: 68 [2020-10-13 23:10:52,998 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 23:10:52,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:10:53,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 23:10:53,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2020-10-13 23:10:53,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:10:53,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-13 23:10:53,006 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 32 [2020-10-13 23:10:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:53,006 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-13 23:10:53,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:10:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-13 23:10:53,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 23:10:53,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:53,007 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:53,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:10:53,008 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:53,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:53,008 INFO L82 PathProgramCache]: Analyzing trace with hash 163305894, now seen corresponding path program 7 times [2020-10-13 23:10:53,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:53,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358544373] [2020-10-13 23:10:53,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:53,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:53,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:53,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:54,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:54,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:54,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:10:54,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:10:54,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1686 [2020-10-13 23:10:54,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:54,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:10:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:10:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:10:54,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:54,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:54,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:54,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:54,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:54,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:54,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:10:54,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:54,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:54,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:54,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:54,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:10:54,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:54,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358544373] [2020-10-13 23:10:54,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:54,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:10:54,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645951022] [2020-10-13 23:10:54,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:10:54,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:54,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:10:54,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:10:54,833 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 12 states. [2020-10-13 23:10:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:55,117 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-10-13 23:10:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:10:55,117 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-13 23:10:55,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:55,119 INFO L225 Difference]: With dead ends: 78 [2020-10-13 23:10:55,119 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 23:10:55,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:10:55,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 23:10:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2020-10-13 23:10:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 23:10:55,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-13 23:10:55,133 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 34 [2020-10-13 23:10:55,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:55,133 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-13 23:10:55,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:10:55,133 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-13 23:10:55,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:10:55,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:55,135 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:55,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:10:55,136 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:55,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1196396678, now seen corresponding path program 7 times [2020-10-13 23:10:55,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:55,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770709365] [2020-10-13 23:10:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:55,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:55,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:55,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:55,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:10:55,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:10:55,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-13 23:10:55,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:55,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:55,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:10:55,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:55,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 23:10:55,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:56,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:56,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:56,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:56,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:56,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:56,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:10:56,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:56,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:56,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:56,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:56,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:56,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:10:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:56,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770709365] [2020-10-13 23:10:56,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:56,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:10:56,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604119463] [2020-10-13 23:10:56,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:10:56,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:56,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:10:56,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:10:56,081 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 19 states. [2020-10-13 23:10:56,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:56,650 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-10-13 23:10:56,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:10:56,650 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-13 23:10:56,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:56,651 INFO L225 Difference]: With dead ends: 80 [2020-10-13 23:10:56,651 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 23:10:56,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:10:56,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 23:10:56,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-10-13 23:10:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 23:10:56,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-10-13 23:10:56,665 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 35 [2020-10-13 23:10:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:56,666 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-10-13 23:10:56,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:10:56,666 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-10-13 23:10:56,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:10:56,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:56,667 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:56,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:10:56,667 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:56,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:56,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1785920669, now seen corresponding path program 1 times [2020-10-13 23:10:56,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:56,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272590772] [2020-10-13 23:10:56,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:56,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:56,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:56,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:10:56,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:56,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-13 23:10:56,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:56,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:56,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:10:56,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:56,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:10:56,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:10:56,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:56,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:56,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:56,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:56,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:56,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:10:56,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:56,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:56,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:56,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:56,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:56,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:10:56,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 23:10:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:56,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:56,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:56,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:10:56,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:56,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:10:56,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:56,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:56,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:56,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:56,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:10:56,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:10:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:56,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272590772] [2020-10-13 23:10:56,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:56,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:10:56,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745497501] [2020-10-13 23:10:56,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:10:56,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:56,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:10:56,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:10:56,969 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 11 states. [2020-10-13 23:10:57,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:57,096 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-13 23:10:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:10:57,096 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-13 23:10:57,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:57,097 INFO L225 Difference]: With dead ends: 66 [2020-10-13 23:10:57,097 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 23:10:57,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:10:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 23:10:57,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-13 23:10:57,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 23:10:57,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-13 23:10:57,107 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 37 [2020-10-13 23:10:57,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:57,108 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-13 23:10:57,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:10:57,108 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-13 23:10:57,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:10:57,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:57,109 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:57,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:10:57,109 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1426627073, now seen corresponding path program 8 times [2020-10-13 23:10:57,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:57,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140287450] [2020-10-13 23:10:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:57,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:57,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:57,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:57,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:58,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:00,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:00,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:00,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:01,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:01,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:11:01,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:11:01,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4332 [2020-10-13 23:11:01,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:01,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:01,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:11:01,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:11:01,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:11:01,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:01,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:01,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:01,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:01,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:01,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:01,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:11:01,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:01,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:01,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:01,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:01,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:11:01,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:11:01,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140287450] [2020-10-13 23:11:01,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:01,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:11:01,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189070636] [2020-10-13 23:11:01,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:11:01,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:01,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:11:01,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:11:01,650 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 13 states. [2020-10-13 23:11:01,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:01,898 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2020-10-13 23:11:01,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:11:01,899 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-13 23:11:01,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:01,901 INFO L225 Difference]: With dead ends: 81 [2020-10-13 23:11:01,902 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 23:11:01,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:11:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 23:11:01,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-13 23:11:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:11:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-13 23:11:01,916 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 37 [2020-10-13 23:11:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:01,917 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-13 23:11:01,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:11:01,917 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-13 23:11:01,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:11:01,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:01,918 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:01,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:11:01,918 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:01,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:01,918 INFO L82 PathProgramCache]: Analyzing trace with hash -846885043, now seen corresponding path program 8 times [2020-10-13 23:11:01,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:01,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077617778] [2020-10-13 23:11:01,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:01,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:02,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:02,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:03,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:03,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:11:03,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:11:03,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1198 [2020-10-13 23:11:03,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:03,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:03,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:11:03,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:03,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:11:03,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:03,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:03,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:03,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:03,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:03,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:03,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:03,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:03,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:03,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:03,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:03,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:03,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:11:03,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077617778] [2020-10-13 23:11:03,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:03,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:11:03,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91589491] [2020-10-13 23:11:03,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:11:03,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:03,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:11:03,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:11:03,606 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 22 states. [2020-10-13 23:11:04,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:04,301 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-10-13 23:11:04,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:11:04,301 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2020-10-13 23:11:04,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:04,302 INFO L225 Difference]: With dead ends: 71 [2020-10-13 23:11:04,302 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 23:11:04,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:11:04,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 23:11:04,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-13 23:11:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:11:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-13 23:11:04,310 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 38 [2020-10-13 23:11:04,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:04,310 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-13 23:11:04,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:11:04,311 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-13 23:11:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:11:04,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:04,311 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:04,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:11:04,312 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:04,312 INFO L82 PathProgramCache]: Analyzing trace with hash 992241060, now seen corresponding path program 2 times [2020-10-13 23:11:04,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:04,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764364662] [2020-10-13 23:11:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:04,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:04,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:06,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:06,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:11:06,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:11:06,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1743 [2020-10-13 23:11:06,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:06,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:06,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:11:06,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:06,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:11:06,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:06,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:06,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:06,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:06,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:06,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:06,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:06,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:06,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:06,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:06,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:06,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:06,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:06,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 23:11:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:06,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:06,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:06,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:06,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:06,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:11:06,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:06,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:06,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:11:06,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:06,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:11:06,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:11:06,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764364662] [2020-10-13 23:11:06,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:06,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:11:06,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682386249] [2020-10-13 23:11:06,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:11:06,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:06,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:11:06,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:11:06,395 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 19 states. [2020-10-13 23:11:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:07,125 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-10-13 23:11:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:11:07,126 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2020-10-13 23:11:07,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:07,127 INFO L225 Difference]: With dead ends: 68 [2020-10-13 23:11:07,127 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 23:11:07,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:11:07,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 23:11:07,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-10-13 23:11:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 23:11:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-13 23:11:07,147 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 40 [2020-10-13 23:11:07,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:07,148 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-13 23:11:07,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:11:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-13 23:11:07,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 23:11:07,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:07,151 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:07,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:11:07,152 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:07,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:07,152 INFO L82 PathProgramCache]: Analyzing trace with hash 277973821, now seen corresponding path program 3 times [2020-10-13 23:11:07,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:07,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211659987] [2020-10-13 23:11:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:07,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:07,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:07,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:09,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:09,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 23:11:09,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:11:09,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2674 [2020-10-13 23:11:09,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:09,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:09,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:11:09,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:09,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:11:09,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:10,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:10,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:10,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:10,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:10,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:10,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:10,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:10,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:10,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:10,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:10,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:10,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:10,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 23:11:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:10,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:10,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:10,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:10,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:10,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:11:10,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:10,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:10,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:11:10,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:10,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:11:10,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:11:10,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211659987] [2020-10-13 23:11:10,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:10,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:11:10,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856435697] [2020-10-13 23:11:10,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:11:10,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:10,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:11:10,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:11:10,229 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 22 states. [2020-10-13 23:11:11,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:11,365 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2020-10-13 23:11:11,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:11:11,365 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2020-10-13 23:11:11,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:11,366 INFO L225 Difference]: With dead ends: 85 [2020-10-13 23:11:11,366 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 23:11:11,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:11:11,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 23:11:11,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 62. [2020-10-13 23:11:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 23:11:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-10-13 23:11:11,376 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 43 [2020-10-13 23:11:11,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:11,377 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-10-13 23:11:11,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:11:11,377 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-10-13 23:11:11,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:11:11,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:11,378 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:11,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:11:11,378 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:11,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:11,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1189358844, now seen corresponding path program 4 times [2020-10-13 23:11:11,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:11,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370539830] [2020-10-13 23:11:11,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:11,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:11,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:11,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:11,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:12,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:16,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:16,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 23:11:16,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:11:16,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:11:16,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:16,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:16,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:11:16,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:16,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:11:16,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:16,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:16,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:16,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:16,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:16,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:16,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:16,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:16,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:16,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:16,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 23:11:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:16,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:16,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:16,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:16,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:16,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:16,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:16,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:16,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:16,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:16,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:16,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:11:16,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370539830] [2020-10-13 23:11:16,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:16,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:11:16,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811159085] [2020-10-13 23:11:16,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:11:16,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:16,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:11:16,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:11:16,911 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 22 states. [2020-10-13 23:11:17,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:17,807 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2020-10-13 23:11:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:11:17,810 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-10-13 23:11:17,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:17,811 INFO L225 Difference]: With dead ends: 101 [2020-10-13 23:11:17,811 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 23:11:17,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:11:17,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 23:11:17,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 63. [2020-10-13 23:11:17,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 23:11:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-10-13 23:11:17,825 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 46 [2020-10-13 23:11:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:17,825 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-10-13 23:11:17,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:11:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-10-13 23:11:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:11:17,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:17,826 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:17,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:11:17,827 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:17,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1086743131, now seen corresponding path program 5 times [2020-10-13 23:11:17,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:17,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473510504] [2020-10-13 23:11:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:17,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:18,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:18,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:11:18,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:18,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-13 23:11:18,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:18,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:18,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:11:18,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:18,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 23:11:18,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:18,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:18,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:18,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:18,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:18,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:18,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:18,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:18,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:18,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:18,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:18,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:18,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:18,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 23:11:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:18,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:18,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:18,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:18,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:18,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:18,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:18,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:18,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:18,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:18,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:18,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:18,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 23:11:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:18,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:18,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:18,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:18,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:18,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:11:18,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:18,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:18,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:18,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:18,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:18,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:11:18,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473510504] [2020-10-13 23:11:18,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:18,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:11:18,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988273041] [2020-10-13 23:11:18,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:11:18,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:18,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:11:18,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:11:18,148 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 13 states. [2020-10-13 23:11:18,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:18,329 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2020-10-13 23:11:18,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:11:18,329 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-13 23:11:18,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:18,330 INFO L225 Difference]: With dead ends: 83 [2020-10-13 23:11:18,330 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 23:11:18,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:11:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 23:11:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-13 23:11:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 23:11:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-13 23:11:18,341 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 48 [2020-10-13 23:11:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:18,341 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-13 23:11:18,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:11:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-13 23:11:18,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:11:18,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:18,342 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:18,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:11:18,342 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:18,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:18,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1861989955, now seen corresponding path program 1 times [2020-10-13 23:11:18,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:18,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267525049] [2020-10-13 23:11:18,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:18,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:18,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:18,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:18,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:19,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:19,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:21,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:21,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:21,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:21,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:22,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:23,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:23,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:11:23,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:11:23,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:11:23,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:23,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:23,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:11:23,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:11:23,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:11:23,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:23,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:23,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:23,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:23,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:23,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:23,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:23,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:23,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:23,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:23,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:23,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:11:23,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:23,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 23:11:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:23,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:23,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:23,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:23,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:23,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:11:23,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:23,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:23,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:23,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:11:23,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:23,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:11:23,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267525049] [2020-10-13 23:11:23,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:23,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:11:23,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554929093] [2020-10-13 23:11:23,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:11:23,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:23,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:11:23,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:11:23,497 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 14 states. [2020-10-13 23:11:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:23,872 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2020-10-13 23:11:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:11:23,872 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-13 23:11:23,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:23,877 INFO L225 Difference]: With dead ends: 106 [2020-10-13 23:11:23,878 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 23:11:23,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:11:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 23:11:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-13 23:11:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 23:11:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-13 23:11:23,898 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 48 [2020-10-13 23:11:23,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:23,899 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-13 23:11:23,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:11:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-13 23:11:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:11:23,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:23,899 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:23,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:11:23,900 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:23,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:23,900 INFO L82 PathProgramCache]: Analyzing trace with hash -319643171, now seen corresponding path program 6 times [2020-10-13 23:11:23,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:23,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264649982] [2020-10-13 23:11:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:23,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:24,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:24,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:24,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:24,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:24,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:25,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:28,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:28,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:11:28,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:11:28,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4597 [2020-10-13 23:11:28,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:28,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:28,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:11:28,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:28,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:11:28,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:29,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:29,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:29,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:29,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:29,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:29,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:29,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:29,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:29,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:29,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:29,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:29,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:29,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 23:11:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:29,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:29,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:29,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:29,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:29,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:29,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:29,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:29,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:11:29,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264649982] [2020-10-13 23:11:29,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:29,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:11:29,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220502018] [2020-10-13 23:11:29,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:11:29,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:29,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:11:29,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:11:29,241 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 24 states. [2020-10-13 23:11:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:30,403 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2020-10-13 23:11:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:11:30,404 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-10-13 23:11:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:30,405 INFO L225 Difference]: With dead ends: 104 [2020-10-13 23:11:30,405 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 23:11:30,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:11:30,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 23:11:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 66. [2020-10-13 23:11:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 23:11:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2020-10-13 23:11:30,416 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 49 [2020-10-13 23:11:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:30,417 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2020-10-13 23:11:30,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:11:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2020-10-13 23:11:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:11:30,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:30,418 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:30,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:11:30,418 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:30,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:30,418 INFO L82 PathProgramCache]: Analyzing trace with hash -635117836, now seen corresponding path program 7 times [2020-10-13 23:11:30,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:30,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101095074] [2020-10-13 23:11:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:30,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:30,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:30,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:35,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:35,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:11:35,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:11:35,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4677 [2020-10-13 23:11:35,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:35,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:35,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:11:35,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:35,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 23:11:35,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:35,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:35,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:35,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:35,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:35,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:35,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:35,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:35,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:35,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:35,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:35,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:35,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:35,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 23:11:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:35,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:35,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:35,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:35,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:35,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:11:35,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:35,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:35,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:35,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:35,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:35,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 23:11:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:35,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:35,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:35,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:35,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:35,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:11:35,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:35,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:35,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:11:35,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:35,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:11:35,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:11:35,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101095074] [2020-10-13 23:11:35,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:35,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:11:35,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202214564] [2020-10-13 23:11:35,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:11:35,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:35,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:11:35,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:11:35,530 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 22 states. [2020-10-13 23:11:36,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:36,478 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2020-10-13 23:11:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:11:36,479 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-13 23:11:36,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:36,480 INFO L225 Difference]: With dead ends: 89 [2020-10-13 23:11:36,481 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 23:11:36,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:11:36,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 23:11:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2020-10-13 23:11:36,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 23:11:36,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-10-13 23:11:36,495 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 51 [2020-10-13 23:11:36,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:36,495 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-10-13 23:11:36,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:11:36,495 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-10-13 23:11:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:11:36,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:36,496 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:36,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:11:36,496 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:36,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:36,497 INFO L82 PathProgramCache]: Analyzing trace with hash 711116374, now seen corresponding path program 2 times [2020-10-13 23:11:36,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:36,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715899086] [2020-10-13 23:11:36,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:36,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:36,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:36,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:36,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:36,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:37,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:38,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:39,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:39,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:40,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:40,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:40,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:40,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:40,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:40,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:41,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:41,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:41,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:11:41,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 23:11:41,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:11:41,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:41,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:41,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:11:41,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:11:41,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:11:41,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:41,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:41,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:41,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:41,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:41,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:41,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:41,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:41,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:41,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:41,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:41,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:11:41,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:41,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 23:11:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:41,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:41,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:41,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:41,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:41,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:41,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:41,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:41,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:41,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:11:41,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:41,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:11:41,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715899086] [2020-10-13 23:11:41,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:41,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:11:41,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458350041] [2020-10-13 23:11:41,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:11:41,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:41,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:11:41,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:11:41,665 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 15 states. [2020-10-13 23:11:42,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:42,074 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2020-10-13 23:11:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:11:42,080 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-13 23:11:42,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:42,084 INFO L225 Difference]: With dead ends: 128 [2020-10-13 23:11:42,084 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 23:11:42,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:11:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 23:11:42,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 83. [2020-10-13 23:11:42,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 23:11:42,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-10-13 23:11:42,106 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 51 [2020-10-13 23:11:42,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:42,107 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-10-13 23:11:42,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:11:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-10-13 23:11:42,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:11:42,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:42,115 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:42,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:11:42,117 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:42,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:42,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2137241700, now seen corresponding path program 8 times [2020-10-13 23:11:42,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:42,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336992242] [2020-10-13 23:11:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:42,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:42,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:42,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:42,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:42,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:42,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:42,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:42,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:43,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:47,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:47,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:11:47,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:11:47,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:11:47,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:47,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:11:47,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:47,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:11:47,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:47,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:47,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:47,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:47,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:47,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:47,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:47,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:47,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:47,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:47,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:47,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 23:11:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:47,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:47,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:47,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:47,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:47,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:11:47,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:47,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:47,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:11:47,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:47,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:11:47,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 1 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:11:48,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336992242] [2020-10-13 23:11:48,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:48,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:11:48,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236850558] [2020-10-13 23:11:48,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:11:48,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:48,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:11:48,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:11:48,034 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 27 states. [2020-10-13 23:11:50,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:50,077 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2020-10-13 23:11:50,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:11:50,078 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-10-13 23:11:50,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:50,079 INFO L225 Difference]: With dead ends: 97 [2020-10-13 23:11:50,080 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 23:11:50,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=336, Invalid=1826, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 23:11:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 23:11:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-10-13 23:11:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 23:11:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2020-10-13 23:11:50,095 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 52 [2020-10-13 23:11:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:50,095 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2020-10-13 23:11:50,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:11:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2020-10-13 23:11:50,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:11:50,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:50,096 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:50,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:11:50,097 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:50,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:50,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1800769605, now seen corresponding path program 9 times [2020-10-13 23:11:50,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:50,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509966958] [2020-10-13 23:11:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:50,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:50,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:50,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:50,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:50,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:51,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:55,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:55,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 23:11:55,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:11:55,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:11:55,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:55,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:55,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:11:55,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:55,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:11:55,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:55,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:55,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:55,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:55,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:55,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:55,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:55,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:55,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:55,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:55,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:55,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:55,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:55,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 23:11:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:55,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:55,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:55,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:55,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:55,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:55,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:55,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:55,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:55,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:55,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:55,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:55,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:11:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:55,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:55,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:55,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:55,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:55,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:55,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:55,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:55,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:11:55,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:55,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:11:55,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:11:55,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509966958] [2020-10-13 23:11:55,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:55,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:11:55,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412490666] [2020-10-13 23:11:55,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:11:55,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:55,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:11:55,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:11:55,591 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 24 states. [2020-10-13 23:11:57,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:57,131 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2020-10-13 23:11:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:11:57,132 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-13 23:11:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:57,133 INFO L225 Difference]: With dead ends: 118 [2020-10-13 23:11:57,133 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 23:11:57,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=213, Invalid=1949, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 23:11:57,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 23:11:57,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 89. [2020-10-13 23:11:57,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 23:11:57,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2020-10-13 23:11:57,153 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 54 [2020-10-13 23:11:57,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:57,154 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2020-10-13 23:11:57,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:11:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2020-10-13 23:11:57,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:11:57,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:57,155 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:57,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:11:57,155 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:57,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:57,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1372935572, now seen corresponding path program 10 times [2020-10-13 23:11:57,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:57,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129443520] [2020-10-13 23:11:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:57,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:57,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:57,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:57,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:57,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:57,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:58,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:58,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:59,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:02,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:02,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 23:12:02,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:12:02,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:12:02,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:02,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:02,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:12:02,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:02,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 23:12:02,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:02,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:02,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:02,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:02,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:02,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:02,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:12:02,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:02,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:02,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:02,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:02,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:02,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:12:02,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 23:12:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:02,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:02,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:02,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:02,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:02,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 23:12:02,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:02,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:02,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:12:02,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:02,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:12:02,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:12:02,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 23:12:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:02,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:02,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:02,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:02,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:02,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:12:02,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:02,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:02,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:02,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:02,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:02,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 3 proven. 138 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:12:02,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129443520] [2020-10-13 23:12:02,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:02,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:12:02,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192699114] [2020-10-13 23:12:02,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:12:02,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:02,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:12:02,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:12:02,994 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 25 states. [2020-10-13 23:12:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:04,153 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2020-10-13 23:12:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:12:04,153 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-10-13 23:12:04,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:04,154 INFO L225 Difference]: With dead ends: 99 [2020-10-13 23:12:04,155 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 23:12:04,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:12:04,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 23:12:04,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-10-13 23:12:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 23:12:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2020-10-13 23:12:04,171 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 57 [2020-10-13 23:12:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:04,171 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2020-10-13 23:12:04,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:12:04,171 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2020-10-13 23:12:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 23:12:04,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:04,172 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:04,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:12:04,173 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1918858325, now seen corresponding path program 11 times [2020-10-13 23:12:04,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:04,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039737694] [2020-10-13 23:12:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:04,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:04,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:04,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:12:04,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:04,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-13 23:12:04,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:04,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:12:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:12:04,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:04,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:04,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:04,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:04,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:04,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:04,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:04,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:04,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:04,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:04,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:04,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:04,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:04,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 23:12:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:04,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:04,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:04,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:04,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:04,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:04,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:04,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:04,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:04,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:04,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:04,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:04,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 23:12:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:04,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:04,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:04,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:04,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:04,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:04,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:04,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:04,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:04,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:04,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:04,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:04,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 23:12:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:04,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:04,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:04,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:04,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:04,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:04,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:04,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:04,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:04,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:04,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:04,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 24 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:12:04,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039737694] [2020-10-13 23:12:04,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:04,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:12:04,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799926519] [2020-10-13 23:12:04,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:12:04,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:04,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:12:04,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:12:04,472 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand 15 states. [2020-10-13 23:12:04,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:04,722 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2020-10-13 23:12:04,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:12:04,722 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-13 23:12:04,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:04,724 INFO L225 Difference]: With dead ends: 117 [2020-10-13 23:12:04,724 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 23:12:04,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:12:04,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 23:12:04,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-13 23:12:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 23:12:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-10-13 23:12:04,737 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 59 [2020-10-13 23:12:04,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:04,737 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-10-13 23:12:04,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:12:04,737 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-10-13 23:12:04,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:12:04,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:04,738 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:04,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:12:04,739 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:04,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:04,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1295489678, now seen corresponding path program 12 times [2020-10-13 23:12:04,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:04,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932828540] [2020-10-13 23:12:04,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:04,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:04,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:04,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:08,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:09,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:09,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:12:09,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:12:09,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:12:09,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:09,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:09,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:12:09,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:09,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 23:12:09,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:10,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:10,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:10,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:10,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:10,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:10,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:10,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:10,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:10,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:10,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:10,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:10,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:10,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 23:12:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:10,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:10,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:10,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:10,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:10,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:12:10,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:10,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:10,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:12:10,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:10,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:12:10,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:10,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:12:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:10,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:10,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:10,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:10,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:10,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:10,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:10,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:10,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:10,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:10,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:10,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:10,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:12:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:10,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:10,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:10,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:10,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:10,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:10,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:10,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:10,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:10,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:10,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:10,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 5 proven. 125 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:12:10,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932828540] [2020-10-13 23:12:10,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:10,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:12:10,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389259016] [2020-10-13 23:12:10,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:12:10,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:10,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:12:10,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:12:10,364 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 25 states. [2020-10-13 23:12:11,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:11,537 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2020-10-13 23:12:11,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:12:11,538 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 62 [2020-10-13 23:12:11,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:11,539 INFO L225 Difference]: With dead ends: 107 [2020-10-13 23:12:11,540 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 23:12:11,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:12:11,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 23:12:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-10-13 23:12:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 23:12:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-10-13 23:12:11,554 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 62 [2020-10-13 23:12:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:11,555 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-10-13 23:12:11,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:12:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-10-13 23:12:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:12:11,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:11,556 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:11,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:12:11,556 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:11,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:11,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1958714805, now seen corresponding path program 13 times [2020-10-13 23:12:11,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:11,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463747363] [2020-10-13 23:12:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:11,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:11,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:11,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:11,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:12,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:12,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:16,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:16,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:12:16,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:12:16,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:12:16,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:16,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:16,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:12:16,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:16,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 23:12:16,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:17,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:17,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:17,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:17,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:17,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:17,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:17,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:17,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:17,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:17,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:17,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:17,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:17,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 23:12:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:17,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:17,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:17,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:17,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:17,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:12:17,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:17,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:17,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:12:17,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:17,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:12:17,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:17,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 23:12:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:17,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:17,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:17,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:17,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:17,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:12:17,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:17,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:17,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:12:17,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:17,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:12:17,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:17,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 23:12:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:17,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:17,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:17,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:17,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:17,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:17,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:17,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:17,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:17,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:17,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:17,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 4 proven. 152 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:12:17,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463747363] [2020-10-13 23:12:17,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:17,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:12:17,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370774622] [2020-10-13 23:12:17,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:12:17,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:17,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:12:17,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:12:17,609 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 28 states. [2020-10-13 23:12:19,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:19,792 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2020-10-13 23:12:19,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:12:19,793 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-13 23:12:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:19,796 INFO L225 Difference]: With dead ends: 123 [2020-10-13 23:12:19,797 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 23:12:19,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=221, Invalid=2431, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 23:12:19,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 23:12:19,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 93. [2020-10-13 23:12:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 23:12:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-10-13 23:12:19,813 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 65 [2020-10-13 23:12:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:19,813 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-10-13 23:12:19,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:12:19,813 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-10-13 23:12:19,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:12:19,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:19,814 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:19,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:12:19,814 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:19,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:19,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1046055634, now seen corresponding path program 14 times [2020-10-13 23:12:19,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:19,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143965019] [2020-10-13 23:12:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:19,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:19,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:20,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:20,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:20,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:20,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:22,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:23,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:24,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:24,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:24,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:12:24,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:12:24,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:12:24,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:24,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:24,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:12:24,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:24,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 23:12:24,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:25,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:25,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:25,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:25,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:25,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:25,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:25,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:25,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:25,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:25,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:25,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:25,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:25,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 23:12:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:25,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:25,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:25,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:25,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:25,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:25,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:25,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:25,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:25,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:25,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:25,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:25,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 23:12:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:25,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:25,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:25,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:25,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:25,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:12:25,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:25,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:25,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:12:25,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:25,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:12:25,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:25,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 23:12:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:25,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:25,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:25,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:25,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:25,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:25,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:25,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:25,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:25,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:25,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:25,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 8 proven. 177 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:12:25,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143965019] [2020-10-13 23:12:25,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:25,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:12:25,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912592934] [2020-10-13 23:12:25,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:12:25,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:25,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:12:25,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:12:25,869 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 29 states. [2020-10-13 23:12:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:29,525 INFO L93 Difference]: Finished difference Result 148 states and 167 transitions. [2020-10-13 23:12:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-13 23:12:29,525 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 68 [2020-10-13 23:12:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:29,527 INFO L225 Difference]: With dead ends: 148 [2020-10-13 23:12:29,527 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 23:12:29,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=402, Invalid=4154, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 23:12:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 23:12:29,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2020-10-13 23:12:29,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 23:12:29,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2020-10-13 23:12:29,548 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 68 [2020-10-13 23:12:29,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:29,548 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2020-10-13 23:12:29,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:12:29,549 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2020-10-13 23:12:29,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:12:29,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:29,550 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:29,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:12:29,550 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:29,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:29,550 INFO L82 PathProgramCache]: Analyzing trace with hash -552815575, now seen corresponding path program 15 times [2020-10-13 23:12:29,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:29,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567634541] [2020-10-13 23:12:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:29,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:29,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:29,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 23:12:29,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:29,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-13 23:12:29,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:29,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:29,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:12:29,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:29,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 23:12:29,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:29,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:29,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:29,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:29,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:29,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:29,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:29,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:29,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:29,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:29,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:29,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:29,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:29,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 23:12:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:29,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:29,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:29,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:29,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:29,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:29,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:29,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:29,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:29,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:29,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:29,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:29,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:12:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:29,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:29,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:29,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:29,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:29,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:29,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:29,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:29,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:29,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:29,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:29,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:29,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:12:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:29,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:29,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:29,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:29,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:29,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:29,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:29,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:29,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:29,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:29,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:29,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:29,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:12:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:29,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:29,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:29,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:29,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:29,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:29,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:29,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:29,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:29,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:29,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:29,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 40 proven. 100 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 23:12:29,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567634541] [2020-10-13 23:12:29,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:29,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:12:29,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511307997] [2020-10-13 23:12:29,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:12:29,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:29,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:12:29,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:12:29,916 INFO L87 Difference]: Start difference. First operand 113 states and 126 transitions. Second operand 17 states. [2020-10-13 23:12:30,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:30,248 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2020-10-13 23:12:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:12:30,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2020-10-13 23:12:30,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:30,250 INFO L225 Difference]: With dead ends: 130 [2020-10-13 23:12:30,250 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 23:12:30,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:12:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 23:12:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-13 23:12:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 23:12:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-10-13 23:12:30,264 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 70 [2020-10-13 23:12:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:30,265 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-10-13 23:12:30,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:12:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-10-13 23:12:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:12:30,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:30,266 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:30,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:12:30,267 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:30,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:30,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1034131339, now seen corresponding path program 3 times [2020-10-13 23:12:30,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:30,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685890009] [2020-10-13 23:12:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:30,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:30,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:30,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:30,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:30,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:30,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:31,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:31,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:32,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:32,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:33,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:33,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:34,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:35,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:35,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 23:12:35,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:12:35,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:12:35,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:35,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:35,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:12:35,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:12:35,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:12:35,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:35,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:35,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:35,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:35,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:35,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:35,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:35,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:35,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:35,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:35,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:35,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:12:35,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:35,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:12:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:35,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:35,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:35,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:35,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:35,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:12:35,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:35,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:35,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:35,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:12:35,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:35,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:35,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:12:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:35,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:35,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:35,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:35,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:35,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:12:35,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:35,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:35,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:35,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:12:35,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:35,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:35,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:12:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:35,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:35,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:35,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:35,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:35,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:35,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:35,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:35,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:35,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:12:35,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:35,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:35,478 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 6 proven. 176 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 23:12:35,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685890009] [2020-10-13 23:12:35,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:35,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:12:35,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963648285] [2020-10-13 23:12:35,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:12:35,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:35,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:12:35,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:12:35,480 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 16 states. [2020-10-13 23:12:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:35,958 INFO L93 Difference]: Finished difference Result 160 states and 182 transitions. [2020-10-13 23:12:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:12:35,959 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-10-13 23:12:35,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:35,960 INFO L225 Difference]: With dead ends: 160 [2020-10-13 23:12:35,960 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 23:12:35,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:12:35,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 23:12:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 100. [2020-10-13 23:12:35,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 23:12:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2020-10-13 23:12:35,985 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 70 [2020-10-13 23:12:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:35,985 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2020-10-13 23:12:35,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:12:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2020-10-13 23:12:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:12:35,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:35,986 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:35,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:12:35,986 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash 453820651, now seen corresponding path program 16 times [2020-10-13 23:12:35,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:35,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290188194] [2020-10-13 23:12:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:36,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:36,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:36,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:36,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:39,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:40,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:41,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:41,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:12:41,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:12:41,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 23:12:41,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:41,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:41,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:12:41,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:41,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 23:12:41,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:42,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:42,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:42,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:42,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:42,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:42,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:42,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:42,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:42,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:42,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:42,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:42,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:42,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 23:12:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:42,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:42,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:42,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:42,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:42,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:42,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:42,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:42,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:42,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:42,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:42,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:42,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 23:12:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:42,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:42,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:42,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:42,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:42,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:12:42,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:42,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:42,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:12:42,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:42,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:12:42,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:42,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 23:12:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:42,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:42,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:42,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:42,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:42,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:42,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:42,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:42,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:42,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:42,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:42,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 8 proven. 209 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:12:42,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290188194] [2020-10-13 23:12:42,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:42,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:12:42,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007879049] [2020-10-13 23:12:42,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:12:42,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:12:42,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:12:42,137 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 30 states. [2020-10-13 23:12:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:45,962 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2020-10-13 23:12:45,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 23:12:45,962 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 71 [2020-10-13 23:12:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:45,963 INFO L225 Difference]: With dead ends: 147 [2020-10-13 23:12:45,963 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 23:12:45,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=446, Invalid=4246, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 23:12:45,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 23:12:45,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 108. [2020-10-13 23:12:45,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 23:12:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2020-10-13 23:12:45,986 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 71 [2020-10-13 23:12:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:45,987 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2020-10-13 23:12:45,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:12:45,987 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2020-10-13 23:12:45,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 23:12:45,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:45,988 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:45,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:12:45,989 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:45,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:45,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1540016130, now seen corresponding path program 17 times [2020-10-13 23:12:45,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:45,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776645904] [2020-10-13 23:12:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:46,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:46,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:46,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:46,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:51,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:51,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 23:12:51,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:12:51,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:12:51,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:51,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:51,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:12:51,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:51,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 23:12:51,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:51,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:51,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:51,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:51,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:51,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:51,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:51,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:51,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:51,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:51,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:51,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:51,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:51,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 23:12:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:51,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:51,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:51,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:51,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:51,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:51,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:51,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:51,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:12:51,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:51,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:12:51,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:51,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 23:12:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:51,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:51,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:51,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:51,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:51,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:51,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:51,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:51,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:51,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:51,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:51,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:51,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 23:12:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:51,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:51,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:51,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:51,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:51,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:51,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:51,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:51,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:51,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:51,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:51,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:51,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 23:12:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:51,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:51,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:51,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:51,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:51,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:51,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:51,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:51,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:51,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:51,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:51,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 7 proven. 168 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:12:51,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776645904] [2020-10-13 23:12:51,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:51,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:12:51,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231927008] [2020-10-13 23:12:51,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:12:51,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:51,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:12:51,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:12:51,749 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand 28 states. [2020-10-13 23:12:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:53,319 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2020-10-13 23:12:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:12:53,320 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 73 [2020-10-13 23:12:53,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:53,321 INFO L225 Difference]: With dead ends: 130 [2020-10-13 23:12:53,321 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 23:12:53,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=152, Invalid=1828, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:12:53,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 23:12:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2020-10-13 23:12:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 23:12:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 131 transitions. [2020-10-13 23:12:53,342 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 131 transitions. Word has length 73 [2020-10-13 23:12:53,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:53,343 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 131 transitions. [2020-10-13 23:12:53,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:12:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 131 transitions. [2020-10-13 23:12:53,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 23:12:53,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:53,344 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:53,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:12:53,345 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:53,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:53,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1168004252, now seen corresponding path program 4 times [2020-10-13 23:12:53,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:53,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156761749] [2020-10-13 23:12:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:53,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:53,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:53,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:53,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:53,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:54,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:54,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:54,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:56,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:56,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:57,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:57,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:58,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:58,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 23:12:58,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:12:58,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:12:58,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:58,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:58,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:12:58,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:12:58,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:12:58,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:58,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:58,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:58,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:58,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:58,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:58,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:12:58,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:58,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:58,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:58,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:58,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:12:58,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:58,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 23:12:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:58,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:58,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:58,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:58,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:58,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:12:58,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:58,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:12:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:58,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:58,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 23:12:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:58,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:58,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:58,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:58,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:58,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:12:58,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:58,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:58,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:58,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:12:58,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:58,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:58,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 23:12:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:58,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:58,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:58,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:58,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:58,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:12:58,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:58,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:58,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:58,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:12:58,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:58,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 6 proven. 210 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 23:12:58,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156761749] [2020-10-13 23:12:58,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:58,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:12:58,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625514339] [2020-10-13 23:12:58,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:12:58,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:58,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:12:58,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:12:58,565 INFO L87 Difference]: Start difference. First operand 116 states and 131 transitions. Second operand 17 states. [2020-10-13 23:12:59,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:59,111 INFO L93 Difference]: Finished difference Result 186 states and 215 transitions. [2020-10-13 23:12:59,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:12:59,113 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-10-13 23:12:59,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:59,114 INFO L225 Difference]: With dead ends: 186 [2020-10-13 23:12:59,114 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 23:12:59,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=564, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:12:59,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 23:12:59,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-13 23:12:59,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 23:12:59,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 133 transitions. [2020-10-13 23:12:59,141 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 133 transitions. Word has length 73 [2020-10-13 23:12:59,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:59,141 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 133 transitions. [2020-10-13 23:12:59,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:12:59,141 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 133 transitions. [2020-10-13 23:12:59,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:12:59,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:59,143 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:59,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:12:59,143 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:59,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:59,143 INFO L82 PathProgramCache]: Analyzing trace with hash 907094066, now seen corresponding path program 18 times [2020-10-13 23:12:59,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:59,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947929425] [2020-10-13 23:12:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:59,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:59,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:59,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:59,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:59,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:59,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:00,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:00,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:00,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:01,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:01,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:03,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:04,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:04,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 23:13:04,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:13:04,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:13:04,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:04,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:04,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:13:04,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:04,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 23:13:04,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:04,935 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-13 23:13:06,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:06,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:06,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:06,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:06,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:06,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:06,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:06,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:06,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:06,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:06,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:06,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:06,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 23:13:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:06,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:06,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:06,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:06,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:06,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:13:06,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:06,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:06,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:13:06,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:06,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:13:06,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:06,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:13:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:06,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:06,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:06,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:06,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:06,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:13:06,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:06,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:06,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:06,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:06,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:06,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:06,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 23:13:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:06,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:06,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:06,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:06,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:06,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:13:06,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:06,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:06,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:06,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:06,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:06,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:13:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 5 proven. 247 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:13:06,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947929425] [2020-10-13 23:13:06,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:06,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:13:06,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462090011] [2020-10-13 23:13:06,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:13:06,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:06,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:13:06,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:13:06,241 INFO L87 Difference]: Start difference. First operand 118 states and 133 transitions. Second operand 33 states. [2020-10-13 23:13:07,495 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-13 23:13:08,237 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-13 23:13:08,452 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-13 23:13:09,230 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-13 23:13:12,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:12,526 INFO L93 Difference]: Finished difference Result 175 states and 202 transitions. [2020-10-13 23:13:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-13 23:13:12,527 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-13 23:13:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:12,529 INFO L225 Difference]: With dead ends: 175 [2020-10-13 23:13:12,529 INFO L226 Difference]: Without dead ends: 173 [2020-10-13 23:13:12,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=834, Invalid=6476, Unknown=0, NotChecked=0, Total=7310 [2020-10-13 23:13:12,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-13 23:13:12,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 119. [2020-10-13 23:13:12,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 23:13:12,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2020-10-13 23:13:12,559 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 74 [2020-10-13 23:13:12,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:12,559 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2020-10-13 23:13:12,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:13:12,559 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2020-10-13 23:13:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 23:13:12,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:12,560 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:12,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:13:12,560 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:12,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:12,560 INFO L82 PathProgramCache]: Analyzing trace with hash -950896247, now seen corresponding path program 19 times [2020-10-13 23:13:12,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:12,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122189178] [2020-10-13 23:13:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:12,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:12,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:12,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:13,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:13,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:14,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:15,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:15,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:15,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:15,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:17,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:17,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 23:13:17,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:13:17,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:13:17,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:17,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:17,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:13:17,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:17,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:13:17,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:18,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:18,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:18,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:18,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:18,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:18,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:18,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:18,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:18,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:18,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:18,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:18,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:13:18,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 23:13:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:18,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:18,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:18,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:18,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:18,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:18,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:18,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:18,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:18,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:18,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:18,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:18,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 23:13:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:18,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:18,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:18,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:18,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:18,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:13:18,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:18,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:18,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:13:18,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:18,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:13:18,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:13:18,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 23:13:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:18,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:18,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:18,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:18,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:18,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:18,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:18,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:18,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:18,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:18,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:18,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:18,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 23:13:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:18,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:18,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:18,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:18,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:18,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:18,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:18,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:18,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:18,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:18,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:18,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 10 proven. 194 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:13:18,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122189178] [2020-10-13 23:13:18,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:18,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:13:18,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262300652] [2020-10-13 23:13:18,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:13:18,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:18,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:13:18,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=752, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:13:18,464 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand 29 states. [2020-10-13 23:13:20,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:20,690 INFO L93 Difference]: Finished difference Result 145 states and 165 transitions. [2020-10-13 23:13:20,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:13:20,691 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 76 [2020-10-13 23:13:20,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:20,693 INFO L225 Difference]: With dead ends: 145 [2020-10-13 23:13:20,693 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 23:13:20,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=199, Invalid=2351, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 23:13:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 23:13:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2020-10-13 23:13:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 23:13:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2020-10-13 23:13:20,720 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 76 [2020-10-13 23:13:20,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:20,720 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2020-10-13 23:13:20,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:13:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2020-10-13 23:13:20,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 23:13:20,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:20,722 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:20,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:13:20,722 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:20,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:20,722 INFO L82 PathProgramCache]: Analyzing trace with hash 636050667, now seen corresponding path program 5 times [2020-10-13 23:13:20,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:20,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084059528] [2020-10-13 23:13:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:20,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:20,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:21,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:21,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:21,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:21,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:21,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:21,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:22,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:22,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:24,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:24,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:25,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:25,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:13:25,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:13:25,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:13:25,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:25,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:25,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:13:25,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:13:25,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:13:25,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:25,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:25,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:25,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:25,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:25,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:25,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:25,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:25,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:25,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:25,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:25,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:13:25,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:25,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 23:13:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:25,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:25,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:25,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:25,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:25,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:13:25,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:25,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:25,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:25,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:13:25,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:25,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:25,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 23:13:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:25,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:25,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:25,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:25,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:25,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:13:25,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:25,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:25,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:25,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:13:25,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:25,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:25,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 23:13:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:25,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:25,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:25,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:25,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:25,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:13:25,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:25,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:25,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:25,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:13:25,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:25,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 6 proven. 247 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 23:13:25,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084059528] [2020-10-13 23:13:25,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:25,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:13:25,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65163802] [2020-10-13 23:13:25,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:13:25,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:25,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:13:25,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:13:25,987 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand 18 states. [2020-10-13 23:13:26,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:26,666 INFO L93 Difference]: Finished difference Result 212 states and 248 transitions. [2020-10-13 23:13:26,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:13:26,667 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-13 23:13:26,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:26,668 INFO L225 Difference]: With dead ends: 212 [2020-10-13 23:13:26,668 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 23:13:26,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=366, Invalid=690, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:13:26,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 23:13:26,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 113. [2020-10-13 23:13:26,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 23:13:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2020-10-13 23:13:26,690 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 76 [2020-10-13 23:13:26,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:26,691 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2020-10-13 23:13:26,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:13:26,691 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2020-10-13 23:13:26,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:13:26,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:26,692 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:26,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:13:26,692 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:26,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:26,692 INFO L82 PathProgramCache]: Analyzing trace with hash 998221707, now seen corresponding path program 20 times [2020-10-13 23:13:26,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:26,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343634324] [2020-10-13 23:13:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:26,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:26,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:26,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:28,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:28,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:29,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:30,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:30,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:30,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:30,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:31,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:31,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:31,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:31,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 23:13:31,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:13:31,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:13:31,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:31,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:31,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:13:31,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:31,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-13 23:13:31,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:33,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:33,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:33,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:33,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:33,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:33,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:33,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:33,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:33,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:33,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-13 23:13:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:33,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:33,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:33,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:33,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:33,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:13:33,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:33,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:33,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:13:33,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:33,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:13:33,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:33,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-13 23:13:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:33,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:33,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:33,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:33,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:33,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:33,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:33,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:33,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:33,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:33,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:33,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:33,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-13 23:13:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:33,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:33,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:33,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:33,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:33,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:33,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:33,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:33,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 5 proven. 285 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:13:33,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343634324] [2020-10-13 23:13:33,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:33,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 23:13:33,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23356778] [2020-10-13 23:13:33,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 23:13:33,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:33,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 23:13:33,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:13:33,485 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand 36 states. [2020-10-13 23:13:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:41,671 INFO L93 Difference]: Finished difference Result 180 states and 207 transitions. [2020-10-13 23:13:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-13 23:13:41,671 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 77 [2020-10-13 23:13:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:41,672 INFO L225 Difference]: With dead ends: 180 [2020-10-13 23:13:41,672 INFO L226 Difference]: Without dead ends: 178 [2020-10-13 23:13:41,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=950, Invalid=7240, Unknown=0, NotChecked=0, Total=8190 [2020-10-13 23:13:41,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-13 23:13:41,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 118. [2020-10-13 23:13:41,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 23:13:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2020-10-13 23:13:41,708 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 77 [2020-10-13 23:13:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:41,708 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2020-10-13 23:13:41,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 23:13:41,709 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2020-10-13 23:13:41,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:13:41,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:41,710 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:41,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:13:41,710 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:41,711 INFO L82 PathProgramCache]: Analyzing trace with hash 723420834, now seen corresponding path program 21 times [2020-10-13 23:13:41,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:41,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731689001] [2020-10-13 23:13:41,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:41,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:41,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:42,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:42,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:42,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:46,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:46,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:13:46,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:13:46,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:13:46,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:46,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:46,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:13:46,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:46,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 23:13:46,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:48,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:48,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:48,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:48,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:48,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:48,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:48,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:48,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:48,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:48,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:48,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:48,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:48,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 23:13:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:48,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:48,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:48,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:48,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:48,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:13:48,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:48,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:48,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:13:48,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:48,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:13:48,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:48,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 23:13:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:48,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:48,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:48,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:48,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:48,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:13:48,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:48,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:48,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:13:48,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:48,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:13:48,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:48,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 23:13:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:48,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:48,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:48,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:48,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:48,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:48,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:48,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:48,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:48,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-13 23:13:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:48,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:48,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:48,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:48,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:48,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:48,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:48,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:48,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:48,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:48,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:48,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 7 proven. 233 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 23:13:48,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731689001] [2020-10-13 23:13:48,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:48,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:13:48,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159393921] [2020-10-13 23:13:48,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:13:48,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:48,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:13:48,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1050, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:13:48,582 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand 34 states. [2020-10-13 23:13:54,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:54,738 INFO L93 Difference]: Finished difference Result 173 states and 197 transitions. [2020-10-13 23:13:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-13 23:13:54,738 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 79 [2020-10-13 23:13:54,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:54,740 INFO L225 Difference]: With dead ends: 173 [2020-10-13 23:13:54,740 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 23:13:54,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=477, Invalid=6329, Unknown=0, NotChecked=0, Total=6806 [2020-10-13 23:13:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 23:13:54,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2020-10-13 23:13:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 23:13:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 150 transitions. [2020-10-13 23:13:54,774 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 150 transitions. Word has length 79 [2020-10-13 23:13:54,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:54,774 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 150 transitions. [2020-10-13 23:13:54,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:13:54,775 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 150 transitions. [2020-10-13 23:13:54,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 23:13:54,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:54,776 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:54,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:13:54,776 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:54,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:54,776 INFO L82 PathProgramCache]: Analyzing trace with hash -16021831, now seen corresponding path program 22 times [2020-10-13 23:13:54,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:54,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653994993] [2020-10-13 23:13:54,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:54,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:55,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:55,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 23:13:55,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:55,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-13 23:13:55,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:55,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:55,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:13:55,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:55,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 23:13:55,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:55,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:55,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:55,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:55,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:55,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:55,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:55,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:55,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:55,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:55,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:55,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:55,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:55,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 23:13:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:55,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:55,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:55,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:55,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:55,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:55,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:55,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:55,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:55,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:55,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:55,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:55,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 23:13:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:55,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:55,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:55,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:55,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:55,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:55,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:55,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:55,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:55,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:55,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:55,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:55,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 23:13:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:55,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:55,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:55,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:55,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:55,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:55,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:55,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:55,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:55,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:55,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:55,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:55,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 23:13:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:55,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:55,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:55,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:55,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:55,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:55,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:55,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:55,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:55,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:55,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:55,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:55,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-13 23:13:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:55,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:55,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:55,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:55,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:55,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:55,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:55,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:55,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:55,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:55,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:55,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 60 proven. 126 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 23:13:55,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653994993] [2020-10-13 23:13:55,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:55,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:13:55,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328273083] [2020-10-13 23:13:55,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:13:55,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:55,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:13:55,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:13:55,268 INFO L87 Difference]: Start difference. First operand 133 states and 150 transitions. Second operand 19 states. [2020-10-13 23:13:55,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:55,738 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2020-10-13 23:13:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:13:55,739 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-10-13 23:13:55,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:55,740 INFO L225 Difference]: With dead ends: 158 [2020-10-13 23:13:55,740 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 23:13:55,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:13:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 23:13:55,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-13 23:13:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 23:13:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 137 transitions. [2020-10-13 23:13:55,766 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 137 transitions. Word has length 81 [2020-10-13 23:13:55,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:55,766 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 137 transitions. [2020-10-13 23:13:55,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:13:55,766 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 137 transitions. [2020-10-13 23:13:55,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:13:55,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:55,767 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:55,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:13:55,768 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:55,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:55,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1446594839, now seen corresponding path program 23 times [2020-10-13 23:13:55,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:55,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835664140] [2020-10-13 23:13:55,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:55,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:55,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:56,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:56,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:57,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:57,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:57,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:57,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:58,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:58,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:58,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:58,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:59,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:59,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:00,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:00,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:00,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 23:14:00,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 23:14:00,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:14:00,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:00,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:00,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:14:00,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:14:00,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 23:14:00,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:14:02,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:14:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:02,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:02,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:02,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:14:02,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:02,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:02,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:02,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:02,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:14:02,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:02,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:14:02,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:02,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 23:14:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:02,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:02,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:02,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:02,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:02,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:02,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:02,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:02,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:02,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:02,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:02,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:02,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:14:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:02,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:02,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:02,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:02,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:02,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:02,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:02,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:02,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:02,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:02,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:02,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:02,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 23:14:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:02,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:02,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:02,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:02,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:02,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:14:02,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:02,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:02,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:14:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:14:02,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:02,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-13 23:14:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:02,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:02,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:02,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:02,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:02,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:02,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:02,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:02,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 13 proven. 258 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:14:02,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835664140] [2020-10-13 23:14:02,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:14:02,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:14:02,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363794745] [2020-10-13 23:14:02,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:14:02,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:14:02,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:14:02,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:14:02,321 INFO L87 Difference]: Start difference. First operand 122 states and 137 transitions. Second operand 32 states. [2020-10-13 23:14:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:14:06,314 INFO L93 Difference]: Finished difference Result 144 states and 162 transitions. [2020-10-13 23:14:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:14:06,315 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 82 [2020-10-13 23:14:06,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:14:06,317 INFO L225 Difference]: With dead ends: 144 [2020-10-13 23:14:06,317 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 23:14:06,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=341, Invalid=2629, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 23:14:06,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 23:14:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 88. [2020-10-13 23:14:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 23:14:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2020-10-13 23:14:06,339 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 82 [2020-10-13 23:14:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:14:06,339 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2020-10-13 23:14:06,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:14:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2020-10-13 23:14:06,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 23:14:06,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:14:06,340 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:14:06,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 23:14:06,340 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:14:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:14:06,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1953022272, now seen corresponding path program 24 times [2020-10-13 23:14:06,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:14:06,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739682116] [2020-10-13 23:14:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:14:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:06,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:06,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:06,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:07,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:07,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:11,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:11,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 23:14:11,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:14:11,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:14:11,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:11,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:11,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:14:11,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:14:11,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 23:14:11,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:12,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:14:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:12,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:12,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:12,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:14:12,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:12,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:12,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:12,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:12,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:14:12,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:12,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:14:12,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:12,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 23:14:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:12,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:12,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:12,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:12,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:12,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:12,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:12,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:12,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:12,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:12,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:12,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:12,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 23:14:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:12,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:12,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:12,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:12,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:12,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:12,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:12,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:12,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:12,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:12,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:12,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:12,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 23:14:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:12,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:12,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:12,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:12,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:12,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:14:12,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:12,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:14:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:12,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:14:12,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:12,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 23:14:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:12,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:12,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:12,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:12,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:12,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:14:12,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:12,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:12,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:12,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:12,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:12,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:14:12,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-13 23:14:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:12,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:12,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:12,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:12,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:12,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:14:12,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:12,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:12,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:12,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:12,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:12,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:14:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 15 proven. 212 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 23:14:12,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739682116] [2020-10-13 23:14:12,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:14:12,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:14:12,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332665520] [2020-10-13 23:14:12,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:14:12,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:14:12,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:14:12,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=754, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:14:12,332 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 29 states. [2020-10-13 23:14:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:14:14,694 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2020-10-13 23:14:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:14:14,694 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 84 [2020-10-13 23:14:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:14:14,696 INFO L225 Difference]: With dead ends: 121 [2020-10-13 23:14:14,696 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 23:14:14,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=164, Invalid=2092, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 23:14:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 23:14:14,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 107. [2020-10-13 23:14:14,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 23:14:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2020-10-13 23:14:14,724 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 84 [2020-10-13 23:14:14,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:14:14,724 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2020-10-13 23:14:14,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:14:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2020-10-13 23:14:14,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:14:14,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:14:14,725 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:14:14,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 23:14:14,726 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:14:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:14:14,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1082565977, now seen corresponding path program 25 times [2020-10-13 23:14:14,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:14:14,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765520616] [2020-10-13 23:14:14,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:14:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:14,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:14,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:14,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:15,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:15,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:15,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:15,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:15,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:17,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:18,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:19,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:19,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 23:14:19,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:14:19,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:14:19,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:19,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:19,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:14:19,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:14:19,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-13 23:14:19,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:14:21,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:14:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:21,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:21,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:21,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:14:21,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:21,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:21,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:21,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:21,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:14:21,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:21,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:14:21,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:21,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 23:14:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:21,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:21,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:21,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:21,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:21,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:21,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:21,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:21,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:21,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:21,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:21,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:21,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 23:14:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:21,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:21,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:21,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:21,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:21,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:21,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:21,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:21,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:21,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:21,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:21,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:21,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 23:14:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:21,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:21,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:21,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:21,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:21,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:21,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:21,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:21,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:21,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:21,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:21,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:21,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-13 23:14:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:21,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:21,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:21,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:21,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:21,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:21,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:21,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:21,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:21,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:21,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:21,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:21,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-13 23:14:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:21,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:21,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:21,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:21,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:21,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:21,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:21,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:21,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:21,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:21,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:21,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 10 proven. 237 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 23:14:21,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765520616] [2020-10-13 23:14:21,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:14:21,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:14:21,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518269030] [2020-10-13 23:14:21,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:14:21,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:14:21,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:14:21,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=922, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:14:21,110 INFO L87 Difference]: Start difference. First operand 107 states and 120 transitions. Second operand 32 states. [2020-10-13 23:14:23,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:14:23,348 INFO L93 Difference]: Finished difference Result 154 states and 175 transitions. [2020-10-13 23:14:23,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:14:23,351 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-10-13 23:14:23,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:14:23,352 INFO L225 Difference]: With dead ends: 154 [2020-10-13 23:14:23,352 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 23:14:23,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=160, Invalid=2192, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 23:14:23,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 23:14:23,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2020-10-13 23:14:23,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 23:14:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2020-10-13 23:14:23,397 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 87 [2020-10-13 23:14:23,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:14:23,398 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2020-10-13 23:14:23,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:14:23,398 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2020-10-13 23:14:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 23:14:23,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:14:23,399 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:14:23,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 23:14:23,400 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:14:23,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:14:23,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1963352416, now seen corresponding path program 26 times [2020-10-13 23:14:23,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:14:23,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133842154] [2020-10-13 23:14:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:14:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:23,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:23,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:23,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:23,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:24,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:24,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:24,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking...