/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:07:39,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:07:39,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:07:39,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:07:39,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:07:39,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:07:39,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:07:39,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:07:39,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:07:39,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:07:39,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:07:39,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:07:39,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:07:39,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:07:39,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:07:39,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:07:39,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:07:39,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:07:39,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:07:39,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:07:39,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:07:39,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:07:39,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:07:39,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:07:39,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:07:39,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:07:39,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:07:39,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:07:39,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:07:39,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:07:39,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:07:39,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:07:39,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:07:39,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:07:39,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:07:39,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:07:39,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:07:39,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:07:39,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:07:39,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:07:39,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:07:39,129 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 10:07:39,171 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:07:39,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:07:39,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:07:39,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:07:39,173 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:07:39,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:07:39,173 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:07:39,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:07:39,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:07:39,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:07:39,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:07:39,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:07:39,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:07:39,174 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:07:39,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:07:39,175 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:07:39,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:07:39,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:07:39,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:07:39,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:07:39,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:07:39,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:07:39,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:07:39,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:07:39,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:07:39,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:07:39,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:07:39,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:07:39,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:07:39,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:07:39,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:07:39,502 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:07:39,506 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:07:39,507 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:07:39,507 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:07:39,508 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3.c [2020-10-12 10:07:39,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f036c6a83/8f2efd22725d44d9b265691110391838/FLAGe8bc9f23c [2020-10-12 10:07:39,988 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:07:39,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs3.c [2020-10-12 10:07:39,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f036c6a83/8f2efd22725d44d9b265691110391838/FLAGe8bc9f23c [2020-10-12 10:07:40,320 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f036c6a83/8f2efd22725d44d9b265691110391838 [2020-10-12 10:07:40,327 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:07:40,329 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:07:40,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:07:40,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:07:40,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:07:40,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:07:40" (1/1) ... [2020-10-12 10:07:40,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@369b8346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:40, skipping insertion in model container [2020-10-12 10:07:40,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:07:40" (1/1) ... [2020-10-12 10:07:40,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:07:40,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:07:40,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:07:40,533 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:07:40,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:07:40,569 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:07:40,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:40 WrapperNode [2020-10-12 10:07:40,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:07:40,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:07:40,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:07:40,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:07:40,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:40" (1/1) ... [2020-10-12 10:07:40,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:40" (1/1) ... [2020-10-12 10:07:40,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:40" (1/1) ... [2020-10-12 10:07:40,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:40" (1/1) ... [2020-10-12 10:07:40,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:40" (1/1) ... [2020-10-12 10:07:40,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:40" (1/1) ... [2020-10-12 10:07:40,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:40" (1/1) ... [2020-10-12 10:07:40,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:07:40,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:07:40,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:07:40,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:07:40,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:07:40,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:07:40,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:07:40,741 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:07:40,741 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:07:40,741 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:07:40,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:07:40,741 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:07:40,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:07:40,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:07:40,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:07:40,742 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 10:07:40,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:07:40,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:07:40,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 10:07:40,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:07:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:07:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:07:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:07:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:07:41,004 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:07:41,004 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 10:07:41,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:07:41 BoogieIcfgContainer [2020-10-12 10:07:41,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:07:41,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:07:41,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:07:41,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:07:41,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:07:40" (1/3) ... [2020-10-12 10:07:41,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32ad178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:07:41, skipping insertion in model container [2020-10-12 10:07:41,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:07:40" (2/3) ... [2020-10-12 10:07:41,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32ad178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:07:41, skipping insertion in model container [2020-10-12 10:07:41,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:07:41" (3/3) ... [2020-10-12 10:07:41,016 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3.c [2020-10-12 10:07:41,026 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:07:41,033 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:07:41,046 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:07:41,077 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:07:41,077 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:07:41,077 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:07:41,077 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:07:41,077 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:07:41,077 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:07:41,078 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:07:41,078 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:07:41,094 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-12 10:07:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 10:07:41,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:41,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:41,100 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:41,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:41,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-10-12 10:07:41,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:41,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383446615] [2020-10-12 10:07:41,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:41,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:41,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:41,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:41,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:41,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 10:07:41,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:41,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-12 10:07:41,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:41,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 10:07:41,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:07:41,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:07:41,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:07:41,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:41,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:41,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:41,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:41,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:41,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:07:41,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:41,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:41,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:41,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:41,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:41,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:07:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:41,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:41,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:41,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:41,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:41,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:07:41,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 10:07:41,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:41,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:07:41,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:41,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:07:41,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:07:41,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383446615] [2020-10-12 10:07:41,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:07:41,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 10:07:41,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280247557] [2020-10-12 10:07:41,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 10:07:41,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:41,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 10:07:41,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:07:41,773 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-10-12 10:07:41,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:41,951 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2020-10-12 10:07:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:07:41,953 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-12 10:07:41,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:41,961 INFO L225 Difference]: With dead ends: 62 [2020-10-12 10:07:41,962 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 10:07:41,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 10:07:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 10:07:42,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-12 10:07:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 10:07:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-12 10:07:42,008 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-10-12 10:07:42,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:42,008 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-12 10:07:42,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 10:07:42,009 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-12 10:07:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:07:42,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:42,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:42,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:07:42,011 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:42,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:42,011 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-10-12 10:07:42,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:42,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732155642] [2020-10-12 10:07:42,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:42,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:42,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:42,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:42,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:42,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 10:07:42,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:42,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-12 10:07:42,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:42,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:07:42,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:07:42,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:07:42,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:42,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:42,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:42,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:42,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:42,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:42,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:07:42,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:42,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:42,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:42,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:42,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:42,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:07:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:42,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:42,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:42,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:42,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:42,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:07:42,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:42,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:42,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:07:42,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732155642] [2020-10-12 10:07:42,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:42,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:07:42,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703941759] [2020-10-12 10:07:42,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:07:42,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:42,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:07:42,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:07:42,669 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 9 states. [2020-10-12 10:07:42,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:42,961 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-12 10:07:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:07:42,962 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-12 10:07:42,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:42,964 INFO L225 Difference]: With dead ends: 37 [2020-10-12 10:07:42,965 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 10:07:42,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:07:42,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 10:07:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-12 10:07:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 10:07:42,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-12 10:07:42,977 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 27 [2020-10-12 10:07:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:42,978 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-12 10:07:42,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:07:42,978 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-12 10:07:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:07:42,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:42,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:42,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:07:42,981 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:42,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:42,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1205224842, now seen corresponding path program 1 times [2020-10-12 10:07:42,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:42,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933260487] [2020-10-12 10:07:42,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:43,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:43,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:43,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:43,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:43,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 10:07:43,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:07:43,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-10-12 10:07:43,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:07:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:07:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:07:43,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:43,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:43,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:43,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:43,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:43,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:43,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:07:43,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:43,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:43,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:43,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:43,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:43,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:07:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:43,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:43,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:43,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:43,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:43,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:43,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:43,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:43,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:43,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:43,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:07:43,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933260487] [2020-10-12 10:07:43,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:43,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:07:43,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803010868] [2020-10-12 10:07:43,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:07:43,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:43,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:07:43,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:07:43,604 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-10-12 10:07:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:43,884 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2020-10-12 10:07:43,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:07:43,885 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-12 10:07:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:43,887 INFO L225 Difference]: With dead ends: 62 [2020-10-12 10:07:43,887 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 10:07:43,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:07:43,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 10:07:43,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-10-12 10:07:43,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 10:07:43,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-12 10:07:43,902 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2020-10-12 10:07:43,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:43,903 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-12 10:07:43,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:07:43,903 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-12 10:07:43,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 10:07:43,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:43,906 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:43,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:07:43,906 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:43,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-10-12 10:07:43,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:43,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116697568] [2020-10-12 10:07:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:43,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:44,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:44,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:44,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:44,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:44,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:44,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:44,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:45,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:45,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:45,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:46,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:46,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:46,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:47,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:47,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:47,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:48,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:48,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:48,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:48,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:48,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:48,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 10:07:48,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-12 10:07:48,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4693 [2020-10-12 10:07:48,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:48,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:07:48,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:07:48,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:07:48,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:49,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:49,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:49,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:49,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:49,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:49,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:49,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:49,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:49,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:49,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:49,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:49,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:07:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:49,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:49,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:49,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:49,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:49,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:07:49,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:49,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:49,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:49,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:49,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:07:49,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116697568] [2020-10-12 10:07:49,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:49,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:07:49,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689726679] [2020-10-12 10:07:49,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:07:49,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:49,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:07:49,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:07:49,247 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 18 states. [2020-10-12 10:07:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:50,870 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2020-10-12 10:07:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:07:50,870 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-12 10:07:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:50,873 INFO L225 Difference]: With dead ends: 76 [2020-10-12 10:07:50,874 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 10:07:50,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:07:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 10:07:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2020-10-12 10:07:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 10:07:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-10-12 10:07:50,886 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 33 [2020-10-12 10:07:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:50,886 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-10-12 10:07:50,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:07:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-10-12 10:07:50,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 10:07:50,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:50,888 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:50,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:07:50,888 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:50,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:50,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-10-12 10:07:50,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:50,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653499740] [2020-10-12 10:07:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:50,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:50,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:50,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:51,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:51,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:51,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:51,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:51,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:52,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:52,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:52,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:53,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:54,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:54,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:54,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:55,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:55,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:55,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:55,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:55,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 10:07:55,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 10:07:55,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:07:55,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:07:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:07:55,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:07:55,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:07:56,349 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-12 10:07:56,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:07:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:56,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:56,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:56,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:07:56,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:56,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:07:56,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:56,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:56,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:56,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:56,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:07:56,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:07:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:56,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:56,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:07:56,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:07:56,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:07:56,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:07:56,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:07:56,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:07:56,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:07:56,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:07:56,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:07:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:07:56,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653499740] [2020-10-12 10:07:56,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:07:56,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:07:56,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59931993] [2020-10-12 10:07:56,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:07:56,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:07:56,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:07:56,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:07:56,824 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 20 states. [2020-10-12 10:07:57,395 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-12 10:07:57,704 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-12 10:07:58,165 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-12 10:07:58,716 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-12 10:07:58,893 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-12 10:07:59,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:07:59,005 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-10-12 10:07:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:07:59,005 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-10-12 10:07:59,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:07:59,007 INFO L225 Difference]: With dead ends: 71 [2020-10-12 10:07:59,007 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 10:07:59,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=218, Invalid=1422, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:07:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 10:07:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-10-12 10:07:59,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 10:07:59,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-10-12 10:07:59,019 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 36 [2020-10-12 10:07:59,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:07:59,019 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-10-12 10:07:59,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:07:59,020 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-10-12 10:07:59,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 10:07:59,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:07:59,021 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:07:59,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:07:59,021 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:07:59,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:07:59,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1906589063, now seen corresponding path program 3 times [2020-10-12 10:07:59,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:07:59,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802568927] [2020-10-12 10:07:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:07:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:07:59,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:07:59,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:00,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:00,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:00,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:01,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:01,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:01,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:01,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:01,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:03,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:03,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:03,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:03,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:04,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:04,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:04,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 10:08:04,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-12 10:08:04,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-12 10:08:04,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:04,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:08:04,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:08:04,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:08:04,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:04,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:04,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:04,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:04,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:04,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:04,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:04,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:04,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:04,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:04,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:04,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:04,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:08:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:04,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:04,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:04,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:04,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:04,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:04,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:04,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:04,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:04,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:04,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:08:04,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802568927] [2020-10-12 10:08:04,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:04,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:08:04,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915266730] [2020-10-12 10:08:04,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:08:04,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:04,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:08:04,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:08:04,455 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 19 states. [2020-10-12 10:08:05,376 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-12 10:08:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:05,738 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-10-12 10:08:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:08:05,738 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-10-12 10:08:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:05,740 INFO L225 Difference]: With dead ends: 71 [2020-10-12 10:08:05,740 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 10:08:05,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:08:05,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 10:08:05,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2020-10-12 10:08:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 10:08:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-12 10:08:05,752 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 36 [2020-10-12 10:08:05,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:05,752 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-12 10:08:05,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:08:05,752 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-12 10:08:05,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:08:05,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:05,754 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:05,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:08:05,754 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:05,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:05,754 INFO L82 PathProgramCache]: Analyzing trace with hash -67698309, now seen corresponding path program 4 times [2020-10-12 10:08:05,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:05,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31129648] [2020-10-12 10:08:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:05,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:05,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:05,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:05,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:05,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:05,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:06,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:06,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:06,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:06,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:06,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:06,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:06,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:06,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:06,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:07,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:07,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:07,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:07,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:07,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:07,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:07,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:10,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:10,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:08:10,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-12 10:08:10,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:08:10,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:10,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:08:10,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:08:10,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:08:10,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:08:10,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:10,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:10,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:10,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:10,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:10,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:10,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:10,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:10,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:10,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:10,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:10,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:08:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:10,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:10,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:10,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:10,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:10,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:10,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:10,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:10,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:10,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:10,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:08:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:08:10,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31129648] [2020-10-12 10:08:10,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:10,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:08:10,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835091568] [2020-10-12 10:08:10,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:08:10,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:10,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:08:10,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:08:10,994 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 15 states. [2020-10-12 10:08:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:11,458 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2020-10-12 10:08:11,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:08:11,458 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-12 10:08:11,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:11,460 INFO L225 Difference]: With dead ends: 98 [2020-10-12 10:08:11,460 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 10:08:11,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:08:11,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 10:08:11,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2020-10-12 10:08:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 10:08:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-10-12 10:08:11,471 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 39 [2020-10-12 10:08:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:11,471 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-10-12 10:08:11,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:08:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-10-12 10:08:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:08:11,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:11,473 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:11,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:08:11,473 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:11,473 INFO L82 PathProgramCache]: Analyzing trace with hash 925984472, now seen corresponding path program 5 times [2020-10-12 10:08:11,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:11,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249144916] [2020-10-12 10:08:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:11,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:11,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:12,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:12,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:12,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:12,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:12,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:13,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:13,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:13,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:13,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:13,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:14,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:14,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:14,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:14,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:14,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:14,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:14,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:14,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:14,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:15,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:15,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:15,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:15,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:15,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:15,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:15,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:16,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:16,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:08:16,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 38 [2020-10-12 10:08:16,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 10:08:16,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:16,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:08:16,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:08:16,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:08:16,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:16,806 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2020-10-12 10:08:16,952 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2020-10-12 10:08:17,119 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-10-12 10:08:17,372 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2020-10-12 10:08:17,506 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-12 10:08:17,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:17,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:17,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:17,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:17,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:17,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:17,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:17,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:17,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:17,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:17,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:17,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:08:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:17,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:17,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:17,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:17,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:17,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:17,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:17,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:17,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:17,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:08:17,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249144916] [2020-10-12 10:08:17,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:17,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:08:17,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661035956] [2020-10-12 10:08:17,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:08:17,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:17,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:08:17,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:08:17,915 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 22 states. [2020-10-12 10:08:18,850 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-12 10:08:19,178 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-10-12 10:08:19,341 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2020-10-12 10:08:19,589 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-12 10:08:19,852 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-12 10:08:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:20,309 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-10-12 10:08:20,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:08:20,309 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2020-10-12 10:08:20,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:20,311 INFO L225 Difference]: With dead ends: 84 [2020-10-12 10:08:20,311 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 10:08:20,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=260, Invalid=1632, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:08:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 10:08:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2020-10-12 10:08:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 10:08:20,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-10-12 10:08:20,322 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 39 [2020-10-12 10:08:20,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:20,323 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-10-12 10:08:20,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:08:20,323 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-10-12 10:08:20,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 10:08:20,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:20,324 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:20,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:08:20,324 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:20,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:20,325 INFO L82 PathProgramCache]: Analyzing trace with hash 155128981, now seen corresponding path program 6 times [2020-10-12 10:08:20,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:20,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980574460] [2020-10-12 10:08:20,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:20,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:20,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:20,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:20,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:20,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:20,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:20,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:20,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:20,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:20,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:20,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:21,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:22,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:25,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:25,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:08:25,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-12 10:08:25,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:08:25,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:25,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:08:25,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:08:25,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:08:25,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:25,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:25,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:25,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:25,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:25,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:25,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:25,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:25,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:25,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:25,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:25,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:25,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:08:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:25,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:25,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:25,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:25,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:25,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:25,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:25,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:25,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:25,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:25,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:08:25,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980574460] [2020-10-12 10:08:25,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:25,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:08:25,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828471822] [2020-10-12 10:08:25,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:08:25,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:25,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:08:25,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:08:25,588 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 17 states. [2020-10-12 10:08:26,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:26,357 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2020-10-12 10:08:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:08:26,358 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-12 10:08:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:26,359 INFO L225 Difference]: With dead ends: 125 [2020-10-12 10:08:26,359 INFO L226 Difference]: Without dead ends: 119 [2020-10-12 10:08:26,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:08:26,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-12 10:08:26,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-12 10:08:26,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 10:08:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2020-10-12 10:08:26,383 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 42 [2020-10-12 10:08:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:26,384 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2020-10-12 10:08:26,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:08:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2020-10-12 10:08:26,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 10:08:26,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:26,385 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:26,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:08:26,386 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:26,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:26,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1457211792, now seen corresponding path program 7 times [2020-10-12 10:08:26,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:26,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454463723] [2020-10-12 10:08:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:26,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:26,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:27,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:27,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:27,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:27,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:28,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:28,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:29,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:29,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:29,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:31,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:31,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:08:31,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-12 10:08:31,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:08:31,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:31,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:08:31,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:08:31,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:08:31,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:31,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:31,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:31,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:31,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:31,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:31,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:31,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:31,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:31,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:31,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:31,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:31,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:08:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:31,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:31,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:31,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:31,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:31,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:31,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:31,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:31,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:31,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:31,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:08:31,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454463723] [2020-10-12 10:08:31,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:31,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:08:31,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942443930] [2020-10-12 10:08:31,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:08:31,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:31,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:08:31,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:08:31,911 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand 22 states. [2020-10-12 10:08:33,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:33,811 INFO L93 Difference]: Finished difference Result 160 states and 195 transitions. [2020-10-12 10:08:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:08:33,813 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-10-12 10:08:33,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:33,815 INFO L225 Difference]: With dead ends: 160 [2020-10-12 10:08:33,815 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 10:08:33,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=362, Invalid=1894, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:08:33,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 10:08:33,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-12 10:08:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 10:08:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-10-12 10:08:33,833 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 42 [2020-10-12 10:08:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:33,834 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-10-12 10:08:33,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:08:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-10-12 10:08:33,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 10:08:33,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:33,835 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:33,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:08:33,836 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:33,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:33,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1289360372, now seen corresponding path program 8 times [2020-10-12 10:08:33,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:33,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597354189] [2020-10-12 10:08:33,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:33,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:33,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:33,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:33,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:34,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:34,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:34,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:34,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:34,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:34,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:34,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:34,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:34,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:34,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:34,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:35,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:35,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:35,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:36,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:36,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:36,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:36,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:36,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:36,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:37,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:37,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:37,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:37,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:37,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:38,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:38,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:38,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:38,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:38,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:08:38,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-12 10:08:38,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:08:38,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:38,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:08:38,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:08:38,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:08:38,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:39,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:39,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:39,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:39,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:39,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:39,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:39,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:39,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:39,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:39,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:39,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:39,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:08:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:39,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:39,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:39,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:39,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:39,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:39,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:39,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:08:39,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:39,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:08:39,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:08:39,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597354189] [2020-10-12 10:08:39,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:39,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:08:39,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396233915] [2020-10-12 10:08:39,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:08:39,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:39,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:08:39,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:08:39,553 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 23 states. [2020-10-12 10:08:41,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:41,409 INFO L93 Difference]: Finished difference Result 195 states and 227 transitions. [2020-10-12 10:08:41,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:08:41,411 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-10-12 10:08:41,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:41,412 INFO L225 Difference]: With dead ends: 195 [2020-10-12 10:08:41,412 INFO L226 Difference]: Without dead ends: 117 [2020-10-12 10:08:41,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=428, Invalid=1828, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:08:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-12 10:08:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 77. [2020-10-12 10:08:41,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 10:08:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-10-12 10:08:41,424 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 42 [2020-10-12 10:08:41,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:41,425 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-10-12 10:08:41,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:08:41,425 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-10-12 10:08:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 10:08:41,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:41,426 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:41,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:08:41,426 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:41,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:41,427 INFO L82 PathProgramCache]: Analyzing trace with hash 2090673853, now seen corresponding path program 9 times [2020-10-12 10:08:41,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:41,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699680443] [2020-10-12 10:08:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:41,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:41,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:41,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:41,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:41,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:41,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:41,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:41,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:41,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:42,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:42,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:42,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:43,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:44,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:44,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:44,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:44,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:44,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:44,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:44,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:45,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:45,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:45,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:46,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:46,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:46,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:46,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:46,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:46,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:46,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 10:08:46,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-12 10:08:46,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-12 10:08:46,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:46,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:08:46,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:08:46,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:08:46,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:46,776 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-10-12 10:08:48,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:48,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:48,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:48,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:48,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:48,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:48,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:48,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:48,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:48,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:48,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:48,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:08:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:48,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:48,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:48,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:48,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:48,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:48,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:48,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:48,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:48,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:48,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:08:48,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699680443] [2020-10-12 10:08:48,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:48,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:08:48,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085284595] [2020-10-12 10:08:48,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:08:48,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:48,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:08:48,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:08:48,040 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 25 states. [2020-10-12 10:08:48,994 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-12 10:08:49,378 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-12 10:08:49,656 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2020-10-12 10:08:50,156 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-12 10:08:50,476 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-12 10:08:50,697 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-12 10:08:50,881 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2020-10-12 10:08:51,114 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-12 10:08:51,645 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-12 10:08:52,064 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-10-12 10:08:52,335 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2020-10-12 10:08:52,762 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2020-10-12 10:08:53,239 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2020-10-12 10:08:53,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:53,411 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2020-10-12 10:08:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 10:08:53,412 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 45 [2020-10-12 10:08:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:53,413 INFO L225 Difference]: With dead ends: 115 [2020-10-12 10:08:53,413 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 10:08:53,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=609, Invalid=3173, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 10:08:53,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 10:08:53,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 58. [2020-10-12 10:08:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 10:08:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-10-12 10:08:53,425 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 45 [2020-10-12 10:08:53,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:53,427 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-10-12 10:08:53,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:08:53,427 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-10-12 10:08:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 10:08:53,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:53,428 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:53,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:08:53,428 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:53,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:53,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1483757422, now seen corresponding path program 10 times [2020-10-12 10:08:53,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:53,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832755943] [2020-10-12 10:08:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:53,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:53,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:53,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:53,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:53,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:53,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:53,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:53,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:53,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:54,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:54,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:54,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:54,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:54,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:54,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:54,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:54,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:54,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:54,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:54,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:54,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:58,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:58,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 10:08:58,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-12 10:08:58,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:08:58,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:58,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:08:58,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:08:58,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:08:58,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:58,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:08:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:58,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:58,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:58,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:08:58,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:58,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:08:58,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:58,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:58,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:58,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:58,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:58,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:08:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:58,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:58,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:08:58,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:08:58,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:08:58,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:08:58,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:08:58,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:08:58,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:08:58,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:08:58,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:08:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 11 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:08:58,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832755943] [2020-10-12 10:08:58,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:08:58,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:08:58,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515843793] [2020-10-12 10:08:58,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:08:58,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:08:58,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:08:58,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:08:58,805 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 20 states. [2020-10-12 10:08:59,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:08:59,675 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2020-10-12 10:08:59,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:08:59,676 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-12 10:08:59,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:08:59,677 INFO L225 Difference]: With dead ends: 120 [2020-10-12 10:08:59,678 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 10:08:59,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=360, Invalid=1280, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:08:59,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 10:08:59,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 73. [2020-10-12 10:08:59,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 10:08:59,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-12 10:08:59,690 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 48 [2020-10-12 10:08:59,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:08:59,690 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-12 10:08:59,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:08:59,690 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-12 10:08:59,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 10:08:59,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:08:59,691 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:08:59,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:08:59,691 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:08:59,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:08:59,692 INFO L82 PathProgramCache]: Analyzing trace with hash 405367317, now seen corresponding path program 11 times [2020-10-12 10:08:59,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:08:59,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459175756] [2020-10-12 10:08:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:08:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:08:59,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:59,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:59,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:59,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:59,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:59,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:08:59,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:00,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:02,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:03,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:03,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:03,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:03,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:03,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:03,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:03,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:03,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:03,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:03,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:04,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:04,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:04,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:04,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 10:09:04,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 35 [2020-10-12 10:09:04,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:09:04,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:04,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:09:04,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:09:04,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:09:04,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:05,414 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-12 10:09:05,863 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-12 10:09:06,087 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-12 10:09:06,287 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-12 10:09:06,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:06,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:06,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:06,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:06,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:06,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:06,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:06,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:06,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:09:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:06,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:06,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:06,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:06,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:06,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:06,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:06,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:06,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:06,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:06,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:09:06,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459175756] [2020-10-12 10:09:06,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:06,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:09:06,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519431565] [2020-10-12 10:09:06,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:09:06,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:06,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:09:06,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:09:06,800 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 27 states. [2020-10-12 10:09:07,068 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-12 10:09:07,329 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-12 10:09:07,535 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-12 10:09:07,714 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-12 10:09:08,942 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 80 [2020-10-12 10:09:09,193 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-12 10:09:09,536 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 84 [2020-10-12 10:09:09,889 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2020-10-12 10:09:10,202 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2020-10-12 10:09:10,559 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 87 [2020-10-12 10:09:10,799 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-12 10:09:11,114 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2020-10-12 10:09:11,265 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-12 10:09:11,586 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-12 10:09:11,974 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 75 [2020-10-12 10:09:12,230 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-10-12 10:09:12,615 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 70 [2020-10-12 10:09:12,762 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-12 10:09:13,063 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2020-10-12 10:09:13,239 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-12 10:09:13,536 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-12 10:09:13,780 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-12 10:09:14,372 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 83 [2020-10-12 10:09:14,863 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 85 [2020-10-12 10:09:15,074 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-12 10:09:15,778 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 82 [2020-10-12 10:09:15,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:15,825 INFO L93 Difference]: Finished difference Result 136 states and 155 transitions. [2020-10-12 10:09:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 10:09:15,826 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 48 [2020-10-12 10:09:15,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:15,827 INFO L225 Difference]: With dead ends: 136 [2020-10-12 10:09:15,827 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 10:09:15,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=604, Invalid=3952, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 10:09:15,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 10:09:15,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 85. [2020-10-12 10:09:15,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 10:09:15,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2020-10-12 10:09:15,840 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 48 [2020-10-12 10:09:15,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:15,840 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2020-10-12 10:09:15,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:09:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2020-10-12 10:09:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 10:09:15,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:15,841 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:15,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:09:15,841 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:15,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1465494971, now seen corresponding path program 12 times [2020-10-12 10:09:15,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:15,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204297485] [2020-10-12 10:09:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:15,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:15,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:15,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:15,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:15,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:15,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:16,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:17,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:18,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:18,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:18,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:18,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:18,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:19,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:19,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:20,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:20,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:20,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:20,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:20,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:20,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:20,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:09:20,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 34 [2020-10-12 10:09:20,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:09:20,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:20,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:09:20,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:09:20,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:09:20,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:21,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:21,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:21,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:21,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:21,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:21,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:21,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:21,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:21,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:21,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:21,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:21,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:09:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:21,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:21,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:21,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:21,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:21,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:21,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:21,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:21,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:21,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:21,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 11 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:09:21,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204297485] [2020-10-12 10:09:21,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:21,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:09:21,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615744919] [2020-10-12 10:09:21,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:09:21,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:21,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:09:21,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:09:21,120 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand 18 states. [2020-10-12 10:09:22,473 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-12 10:09:23,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:23,456 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2020-10-12 10:09:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 10:09:23,456 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-12 10:09:23,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:23,458 INFO L225 Difference]: With dead ends: 136 [2020-10-12 10:09:23,458 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 10:09:23,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=562, Invalid=2744, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 10:09:23,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 10:09:23,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 68. [2020-10-12 10:09:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 10:09:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-12 10:09:23,470 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 51 [2020-10-12 10:09:23,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:23,470 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-12 10:09:23,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:09:23,471 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-12 10:09:23,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 10:09:23,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:23,471 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:23,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:09:23,472 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:23,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:23,472 INFO L82 PathProgramCache]: Analyzing trace with hash -283081158, now seen corresponding path program 13 times [2020-10-12 10:09:23,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:23,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810584504] [2020-10-12 10:09:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:23,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:23,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:23,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:23,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:23,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:23,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:24,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:24,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:24,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:25,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:26,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:26,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:26,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:26,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:27,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:27,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:27,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:27,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:27,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:28,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:28,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:28,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:09:28,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-12 10:09:28,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-12 10:09:28,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:28,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:09:28,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:09:28,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:09:28,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:09:29,167 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-12 10:09:29,827 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-12 10:09:30,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:30,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:30,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:30,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:30,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:30,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:30,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:30,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:30,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:30,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:30,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:30,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:09:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:30,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:30,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:30,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:30,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:30,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:30,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:30,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:30,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:30,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:30,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:09:30,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810584504] [2020-10-12 10:09:30,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:30,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:09:30,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451412235] [2020-10-12 10:09:30,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:09:30,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:30,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:09:30,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:09:30,714 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 29 states. [2020-10-12 10:09:31,186 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-12 10:09:31,447 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2020-10-12 10:09:31,665 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-12 10:09:31,979 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-12 10:09:32,142 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-12 10:09:32,329 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2020-10-12 10:09:32,532 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2020-10-12 10:09:32,923 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-12 10:09:33,721 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 99 [2020-10-12 10:09:34,396 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 84 [2020-10-12 10:09:34,711 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 70 [2020-10-12 10:09:34,882 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-12 10:09:35,519 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 94 [2020-10-12 10:09:35,840 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 79 [2020-10-12 10:09:36,191 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-12 10:09:36,486 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-12 10:09:36,713 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-12 10:09:37,212 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-12 10:09:37,456 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-12 10:09:37,999 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 94 [2020-10-12 10:09:38,539 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 97 [2020-10-12 10:09:38,740 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-12 10:09:39,397 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 81 [2020-10-12 10:09:39,669 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 62 [2020-10-12 10:09:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:39,735 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2020-10-12 10:09:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 10:09:39,736 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 51 [2020-10-12 10:09:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:39,737 INFO L225 Difference]: With dead ends: 120 [2020-10-12 10:09:39,737 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 10:09:39,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=631, Invalid=3791, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 10:09:39,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 10:09:39,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 81. [2020-10-12 10:09:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 10:09:39,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2020-10-12 10:09:39,754 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 51 [2020-10-12 10:09:39,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:39,754 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2020-10-12 10:09:39,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:09:39,754 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2020-10-12 10:09:39,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 10:09:39,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:39,755 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:39,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:09:39,756 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:39,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:39,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1382761483, now seen corresponding path program 14 times [2020-10-12 10:09:39,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:39,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121280207] [2020-10-12 10:09:39,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:39,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:39,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:40,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:41,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:41,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:41,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:41,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:41,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:41,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:42,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:42,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:44,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:44,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:44,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:44,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 10:09:44,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-12 10:09:44,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:09:44,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:44,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:09:44,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:09:44,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:09:44,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:45,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:45,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:45,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:45,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:45,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:45,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:45,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:45,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:45,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:45,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:45,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:45,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:09:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:45,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:45,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:45,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:45,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:45,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:45,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:45,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:45,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:09:45,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121280207] [2020-10-12 10:09:45,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:45,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:09:45,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510930667] [2020-10-12 10:09:45,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:09:45,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:45,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:09:45,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:09:45,450 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 23 states. [2020-10-12 10:09:46,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:46,567 INFO L93 Difference]: Finished difference Result 163 states and 182 transitions. [2020-10-12 10:09:46,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:09:46,568 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-12 10:09:46,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:46,570 INFO L225 Difference]: With dead ends: 163 [2020-10-12 10:09:46,570 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 10:09:46,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=372, Invalid=1520, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:09:46,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 10:09:46,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 103. [2020-10-12 10:09:46,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 10:09:46,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2020-10-12 10:09:46,592 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 54 [2020-10-12 10:09:46,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:46,592 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2020-10-12 10:09:46,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:09:46,593 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2020-10-12 10:09:46,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 10:09:46,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:46,593 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:46,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:09:46,594 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:46,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:46,594 INFO L82 PathProgramCache]: Analyzing trace with hash 435309968, now seen corresponding path program 15 times [2020-10-12 10:09:46,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:46,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015704539] [2020-10-12 10:09:46,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:46,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:46,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:47,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:48,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:48,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:49,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:50,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:50,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:50,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:50,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:50,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:50,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:50,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:50,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:50,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:50,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:50,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:50,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:51,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:51,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 10:09:51,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-12 10:09:51,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:09:51,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:51,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:09:51,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 10:09:51,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:09:51,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:52,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:09:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:52,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:52,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:52,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:09:52,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:52,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:09:52,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:52,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:52,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:52,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:52,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:52,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:09:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:52,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:52,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:52,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:09:52,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:09:52,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:09:52,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:52,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:09:52,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:09:52,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:09:52,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:09:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 25 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:09:52,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015704539] [2020-10-12 10:09:52,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:09:52,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:09:52,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463193534] [2020-10-12 10:09:52,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:09:52,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:09:52,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:09:52,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:09:52,188 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand 19 states. [2020-10-12 10:09:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:09:54,541 INFO L93 Difference]: Finished difference Result 188 states and 213 transitions. [2020-10-12 10:09:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 10:09:54,543 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-10-12 10:09:54,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:09:54,544 INFO L225 Difference]: With dead ends: 188 [2020-10-12 10:09:54,544 INFO L226 Difference]: Without dead ends: 165 [2020-10-12 10:09:54,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=500, Invalid=2692, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 10:09:54,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-12 10:09:54,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 91. [2020-10-12 10:09:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 10:09:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-10-12 10:09:54,565 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 54 [2020-10-12 10:09:54,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:09:54,566 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-10-12 10:09:54,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:09:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-10-12 10:09:54,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 10:09:54,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:09:54,567 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:09:54,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:09:54,567 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:09:54,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:09:54,567 INFO L82 PathProgramCache]: Analyzing trace with hash -2124235875, now seen corresponding path program 16 times [2020-10-12 10:09:54,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:09:54,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347209344] [2020-10-12 10:09:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:09:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:09:54,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:54,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:54,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:54,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:54,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:55,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:55,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:55,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:55,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:55,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:55,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:55,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:55,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:57,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:57,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:58,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:58,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:58,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:59,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:09:59,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:09:59,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 10:09:59,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-12 10:09:59,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:09:59,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:09:59,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:09:59,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:09:59,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 10:09:59,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:00,903 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-12 10:10:01,111 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-12 10:10:01,851 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-12 10:10:02,041 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-12 10:10:02,234 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-12 10:10:02,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:02,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:02,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:02,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:02,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:02,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:02,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:02,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:02,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:02,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:02,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:02,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:10:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:02,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:02,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:02,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:02,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:02,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:02,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:10:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:10:02,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:10:02,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347209344] [2020-10-12 10:10:02,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:02,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:10:02,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777625405] [2020-10-12 10:10:02,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:10:02,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:02,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:10:02,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:10:02,819 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 33 states. [2020-10-12 10:10:04,315 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-12 10:10:05,044 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2020-10-12 10:10:05,480 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 46 [2020-10-12 10:10:05,799 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 53 [2020-10-12 10:10:06,200 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 55 [2020-10-12 10:10:06,456 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 51 [2020-10-12 10:10:06,651 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 47 [2020-10-12 10:10:07,141 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 77 [2020-10-12 10:10:07,607 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 80 [2020-10-12 10:10:08,031 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 82 [2020-10-12 10:10:08,411 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-10-12 10:10:08,984 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 88 [2020-10-12 10:10:09,315 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-10-12 10:10:09,898 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 90 [2020-10-12 10:10:10,250 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2020-10-12 10:10:10,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:10,449 INFO L93 Difference]: Finished difference Result 193 states and 233 transitions. [2020-10-12 10:10:10,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 10:10:10,450 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 57 [2020-10-12 10:10:10,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:10,451 INFO L225 Difference]: With dead ends: 193 [2020-10-12 10:10:10,452 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 10:10:10,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=614, Invalid=3676, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 10:10:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 10:10:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-10-12 10:10:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 10:10:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2020-10-12 10:10:10,471 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 57 [2020-10-12 10:10:10,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:10,472 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2020-10-12 10:10:10,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:10:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2020-10-12 10:10:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 10:10:10,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:10,473 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:10,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:10:10,473 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:10,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:10,473 INFO L82 PathProgramCache]: Analyzing trace with hash -306164424, now seen corresponding path program 17 times [2020-10-12 10:10:10,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:10,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460149179] [2020-10-12 10:10:10,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:10,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:10,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:11,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:12,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:12,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:12,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:12,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:12,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:12,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:12,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:13,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:13,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:15,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:15,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:15,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 10:10:15,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 34 [2020-10-12 10:10:15,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:10:15,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:15,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:10:15,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:10:15,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 10:10:15,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:16,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:16,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:16,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:16,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:16,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:16,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:16,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:16,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:16,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:16,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:16,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:10:16,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:10:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:16,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:16,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:16,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:16,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:16,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:16,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:16,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:16,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:16,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:16,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:10:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:10:16,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460149179] [2020-10-12 10:10:16,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:16,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:10:16,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051585640] [2020-10-12 10:10:16,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:10:16,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:16,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:10:16,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:10:16,038 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 20 states. [2020-10-12 10:10:17,813 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-12 10:10:18,257 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-12 10:10:18,409 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-12 10:10:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:19,629 INFO L93 Difference]: Finished difference Result 156 states and 183 transitions. [2020-10-12 10:10:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 10:10:19,630 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-10-12 10:10:19,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:19,631 INFO L225 Difference]: With dead ends: 156 [2020-10-12 10:10:19,632 INFO L226 Difference]: Without dead ends: 150 [2020-10-12 10:10:19,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=750, Invalid=3942, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 10:10:19,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-12 10:10:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 74. [2020-10-12 10:10:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 10:10:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2020-10-12 10:10:19,651 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 57 [2020-10-12 10:10:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:19,651 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2020-10-12 10:10:19,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:10:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2020-10-12 10:10:19,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 10:10:19,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:19,652 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:19,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:10:19,652 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:19,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:19,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1861571529, now seen corresponding path program 18 times [2020-10-12 10:10:19,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:19,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281694352] [2020-10-12 10:10:19,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:19,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:19,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:19,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:20,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:20,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:20,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:20,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:20,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:20,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:20,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:20,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:20,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:20,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:20,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:20,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:20,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:20,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:21,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:21,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:21,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:21,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:21,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:21,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:21,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:21,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:21,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:21,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:21,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:21,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:21,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:23,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:23,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:24,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:24,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:24,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:24,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 10:10:24,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 34 [2020-10-12 10:10:24,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:10:24,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:24,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:10:24,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:10:24,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 10:10:24,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:25,170 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-10-12 10:10:25,378 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-12 10:10:25,532 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-12 10:10:25,856 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2020-10-12 10:10:26,305 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 62 [2020-10-12 10:10:26,873 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 60 [2020-10-12 10:10:27,323 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 58 [2020-10-12 10:10:27,808 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2020-10-12 10:10:28,257 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2020-10-12 10:10:28,567 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-12 10:10:28,888 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-12 10:10:29,244 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2020-10-12 10:10:29,593 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-10-12 10:10:30,005 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 59 [2020-10-12 10:10:30,184 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-12 10:10:30,401 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-10-12 10:10:30,591 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-12 10:10:31,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:31,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:31,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:31,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:31,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:31,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:31,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:31,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:31,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:31,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:31,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:31,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:10:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:31,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:31,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:31,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:31,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:31,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:31,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:31,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:31,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:31,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:31,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:10:31,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281694352] [2020-10-12 10:10:31,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:31,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:10:31,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948219947] [2020-10-12 10:10:31,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:10:31,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:31,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:10:31,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:10:31,499 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 35 states. [2020-10-12 10:10:32,801 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2020-10-12 10:10:33,459 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 86 [2020-10-12 10:10:33,906 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 85 [2020-10-12 10:10:34,431 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 74 [2020-10-12 10:10:34,799 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 75 [2020-10-12 10:10:35,479 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 80 [2020-10-12 10:10:36,278 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 84 [2020-10-12 10:10:36,546 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-12 10:10:36,961 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2020-10-12 10:10:37,254 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 40 [2020-10-12 10:10:37,571 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 63 [2020-10-12 10:10:37,935 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 66 [2020-10-12 10:10:38,803 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 91 [2020-10-12 10:10:39,039 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-12 10:10:39,414 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 46 [2020-10-12 10:10:39,927 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2020-10-12 10:10:40,422 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 89 [2020-10-12 10:10:40,647 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 47 [2020-10-12 10:10:40,988 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 50 [2020-10-12 10:10:41,540 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 102 [2020-10-12 10:10:42,090 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 66 [2020-10-12 10:10:42,270 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-12 10:10:42,818 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-12 10:10:43,612 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 85 [2020-10-12 10:10:44,538 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 94 [2020-10-12 10:10:45,630 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 105 [2020-10-12 10:10:46,344 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 90 [2020-10-12 10:10:47,204 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 101 [2020-10-12 10:10:48,002 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 93 [2020-10-12 10:10:48,281 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-12 10:10:48,683 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2020-10-12 10:10:49,019 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-10-12 10:10:49,461 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-10-12 10:10:50,172 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 76 [2020-10-12 10:10:50,520 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-12 10:10:51,057 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2020-10-12 10:10:51,393 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-12 10:10:51,656 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-12 10:10:52,574 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-10-12 10:10:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:10:52,663 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2020-10-12 10:10:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 10:10:52,664 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 60 [2020-10-12 10:10:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:10:52,665 INFO L225 Difference]: With dead ends: 125 [2020-10-12 10:10:52,665 INFO L226 Difference]: Without dead ends: 119 [2020-10-12 10:10:52,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2044 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=1014, Invalid=6818, Unknown=0, NotChecked=0, Total=7832 [2020-10-12 10:10:52,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-12 10:10:52,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-10-12 10:10:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-12 10:10:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2020-10-12 10:10:52,686 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 60 [2020-10-12 10:10:52,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:10:52,686 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2020-10-12 10:10:52,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:10:52,686 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2020-10-12 10:10:52,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 10:10:52,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:10:52,687 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:10:52,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:10:52,687 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:10:52,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:10:52,687 INFO L82 PathProgramCache]: Analyzing trace with hash -592480040, now seen corresponding path program 19 times [2020-10-12 10:10:52,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:10:52,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773274474] [2020-10-12 10:10:52,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:10:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:52,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:52,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:53,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:53,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:53,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:53,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:53,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:54,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:54,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:55,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:56,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:57,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:57,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:57,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 10:10:57,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 10:10:57,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:10:57,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:57,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:10:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:10:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 10:10:57,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:59,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:10:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:59,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:59,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:59,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:10:59,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:59,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:10:59,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:59,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:59,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:59,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:59,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:59,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:10:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:10:59,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:10:59,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:10:59,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:10:59,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:10:59,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:10:59,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:10:59,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:10:59,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:10:59,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:10:59,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:10:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:10:59,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773274474] [2020-10-12 10:10:59,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:10:59,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:10:59,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865482350] [2020-10-12 10:10:59,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:10:59,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:10:59,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:10:59,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:10:59,555 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand 33 states. [2020-10-12 10:11:02,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:02,721 INFO L93 Difference]: Finished difference Result 171 states and 199 transitions. [2020-10-12 10:11:02,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:11:02,723 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 63 [2020-10-12 10:11:02,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:02,724 INFO L225 Difference]: With dead ends: 171 [2020-10-12 10:11:02,724 INFO L226 Difference]: Without dead ends: 101 [2020-10-12 10:11:02,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:11:02,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-12 10:11:02,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2020-10-12 10:11:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 10:11:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-12 10:11:02,741 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2020-10-12 10:11:02,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:02,742 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-12 10:11:02,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:11:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-12 10:11:02,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 10:11:02,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:02,742 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:02,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:11:02,743 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:02,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:02,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1685037929, now seen corresponding path program 20 times [2020-10-12 10:11:02,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:02,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847120294] [2020-10-12 10:11:02,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:02,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:02,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:02,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:03,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:03,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:03,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:03,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:04,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:05,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:05,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:05,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:05,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:05,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:06,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:07,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:07,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:07,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:07,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:07,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 10:11:07,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-12 10:11:07,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 10:11:07,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:07,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:11:07,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:07,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 10:11:07,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:08,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:08,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:08,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:08,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:08,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:08,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:08,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:08,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:08,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:08,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:08,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:08,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:08,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:08,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:08,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:08,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:08,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:11:08,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:08,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 18 proven. 142 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:11:08,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847120294] [2020-10-12 10:11:08,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:08,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:11:08,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569902116] [2020-10-12 10:11:08,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:11:08,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:08,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:11:08,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:11:08,555 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 27 states. [2020-10-12 10:11:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:10,274 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-10-12 10:11:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 10:11:10,275 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 66 [2020-10-12 10:11:10,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:10,276 INFO L225 Difference]: With dead ends: 106 [2020-10-12 10:11:10,276 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 10:11:10,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=562, Invalid=2408, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 10:11:10,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 10:11:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-10-12 10:11:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 10:11:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-10-12 10:11:10,294 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 66 [2020-10-12 10:11:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:10,295 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-10-12 10:11:10,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:11:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-10-12 10:11:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 10:11:10,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:10,295 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:10,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:11:10,296 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:10,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:10,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2143026821, now seen corresponding path program 21 times [2020-10-12 10:11:10,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:10,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311796821] [2020-10-12 10:11:10,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:10,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:10,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:11,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:12,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:13,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:13,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:14,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:15,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:15,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:15,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 10:11:15,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:11:15,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:11:15,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:15,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 10:11:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 10:11:15,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:16,200 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-12 10:11:16,487 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-10-12 10:11:16,629 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-12 10:11:16,800 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-12 10:11:16,954 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-12 10:11:17,097 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-12 10:11:17,245 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-12 10:11:17,408 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-12 10:11:17,609 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-12 10:11:17,908 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 59 [2020-10-12 10:11:18,137 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2020-10-12 10:11:18,366 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-12 10:11:18,576 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-12 10:11:18,834 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2020-10-12 10:11:19,094 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2020-10-12 10:11:19,365 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-10-12 10:11:20,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:20,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:20,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:20,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:20,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:20,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:11:20,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:20,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:20,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:20,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:20,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:20,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:20,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:20,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:20,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:20,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:20,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:11:20,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:20,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:20,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:20,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:20,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 3 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:20,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311796821] [2020-10-12 10:11:20,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:20,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 10:11:20,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189975202] [2020-10-12 10:11:20,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 10:11:20,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:20,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 10:11:20,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:11:20,573 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 41 states. [2020-10-12 10:11:23,311 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 115 [2020-10-12 10:11:24,436 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 148 DAG size of output: 110 [2020-10-12 10:11:25,355 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 111 [2020-10-12 10:11:25,747 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-10-12 10:11:26,225 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2020-10-12 10:11:26,661 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-12 10:11:27,194 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-10-12 10:11:27,644 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-12 10:11:28,196 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 99 [2020-10-12 10:11:28,674 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 86 [2020-10-12 10:11:29,129 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 89 [2020-10-12 10:11:29,629 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 89 [2020-10-12 10:11:30,123 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 86 [2020-10-12 10:11:30,646 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 96 [2020-10-12 10:11:31,159 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 84 [2020-10-12 10:11:31,750 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 97 [2020-10-12 10:11:32,369 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 107 [2020-10-12 10:11:33,006 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 99 [2020-10-12 10:11:33,732 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 113 [2020-10-12 10:11:34,424 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 117 [2020-10-12 10:11:35,120 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 110 [2020-10-12 10:11:35,890 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 117