/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/sina5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:16:25,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:16:25,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:16:25,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:16:25,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:16:25,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:16:25,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:16:25,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:16:25,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:16:25,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:16:25,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:16:25,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:16:25,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:16:25,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:16:25,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:16:25,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:16:25,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:16:25,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:16:25,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:16:25,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:16:25,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:16:25,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:16:25,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:16:25,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:16:25,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:16:25,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:16:25,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:16:25,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:16:25,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:16:25,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:16:25,685 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:16:25,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:16:25,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:16:25,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:16:25,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:16:25,689 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:16:25,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:16:25,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:16:25,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:16:25,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:16:25,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:16:25,697 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 [2020-10-14 18:16:25,747 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:16:25,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:16:25,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:16:25,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:16:25,752 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:16:25,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:16:25,753 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:16:25,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:16:25,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:16:25,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:16:25,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:16:25,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:16:25,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:16:25,755 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:16:25,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:16:25,756 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:16:25,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:16:25,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:16:25,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:16:25,758 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:16:25,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:16:25,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:16:25,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:16:25,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:16:25,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:16:25,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:16:25,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:16:25,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:16:25,760 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:16:25,761 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:16:26,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:16:26,074 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:16:26,078 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:16:26,083 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:16:26,086 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:16:26,086 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sina5.c [2020-10-14 18:16:26,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0180554c/95da5e1db1d44c20a8177ad0bb5c17af/FLAGd849fcc8f [2020-10-14 18:16:26,594 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:16:26,595 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/sina5.c [2020-10-14 18:16:26,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0180554c/95da5e1db1d44c20a8177ad0bb5c17af/FLAGd849fcc8f [2020-10-14 18:16:26,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0180554c/95da5e1db1d44c20a8177ad0bb5c17af [2020-10-14 18:16:26,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:16:26,986 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:16:26,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:16:26,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:16:26,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:16:26,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:16:26" (1/1) ... [2020-10-14 18:16:26,996 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 14.10 06:16:26, skipping insertion in model container [2020-10-14 18:16:26,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:16:26" (1/1) ... [2020-10-14 18:16:27,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:16:27,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:16:27,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:16:27,230 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:16:27,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:16:27,275 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:16:27,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:27 WrapperNode [2020-10-14 18:16:27,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:16:27,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:16:27,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:16:27,277 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:16:27,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:27" (1/1) ... [2020-10-14 18:16:27,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:27" (1/1) ... [2020-10-14 18:16:27,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:27" (1/1) ... [2020-10-14 18:16:27,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:27" (1/1) ... [2020-10-14 18:16:27,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:27" (1/1) ... [2020-10-14 18:16:27,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:27" (1/1) ... [2020-10-14 18:16:27,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:27" (1/1) ... [2020-10-14 18:16:27,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:16:27,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:16:27,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:16:27,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:16:27,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:27" (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 [2020-10-14 18:16:27,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:16:27,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:16:27,591 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 18:16:27,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:16:27,591 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:16:27,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:16:27,592 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 18:16:27,592 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 18:16:27,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:16:27,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:16:27,592 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 18:16:27,593 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:16:27,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:16:27,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 18:16:27,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:16:27,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:16:27,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:16:27,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:16:27,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:16:27,877 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:16:27,878 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-14 18:16:27,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:16:27 BoogieIcfgContainer [2020-10-14 18:16:27,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:16:27,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:16:27,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:16:27,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:16:27,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:16:26" (1/3) ... [2020-10-14 18:16:27,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675ff667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:16:27, skipping insertion in model container [2020-10-14 18:16:27,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:27" (2/3) ... [2020-10-14 18:16:27,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675ff667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:16:27, skipping insertion in model container [2020-10-14 18:16:27,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:16:27" (3/3) ... [2020-10-14 18:16:27,907 INFO L109 eAbstractionObserver]: Analyzing ICFG sina5.c [2020-10-14 18:16:27,929 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:16:27,948 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:16:27,996 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:16:28,055 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:16:28,055 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:16:28,055 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:16:28,056 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:16:28,056 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:16:28,056 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:16:28,056 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:16:28,056 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:16:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-14 18:16:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 18:16:28,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:28,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:28,090 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:28,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:28,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1994596369, now seen corresponding path program 1 times [2020-10-14 18:16:28,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:28,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321438145] [2020-10-14 18:16:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:28,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:28,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:28,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:28,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:28,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:28,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:28,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:28,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:28,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:29,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:29,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 18:16:29,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:16:29,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1224 [2020-10-14 18:16:29,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:29,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:29,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:16:29,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:16:29,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:16:29,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 18:16:29,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:16:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:29,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:29,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:29,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:16:29,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:29,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:16:29,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:29,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:29,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:29,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:29,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:29,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:29,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:16:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:29,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:29,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:29,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:29,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:16:29,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:16:29,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:16:29,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:29,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:29,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:16:29,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:29,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:16:29,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:16:29,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321438145] [2020-10-14 18:16:29,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:16:29,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 18:16:29,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475685975] [2020-10-14 18:16:29,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:16:29,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:16:29,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:16:29,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:16:29,624 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 5 states. [2020-10-14 18:16:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:16:29,887 INFO L93 Difference]: Finished difference Result 86 states and 124 transitions. [2020-10-14 18:16:29,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:16:29,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-14 18:16:29,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:16:29,899 INFO L225 Difference]: With dead ends: 86 [2020-10-14 18:16:29,900 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 18:16:29,904 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 [2020-10-14 18:16:29,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 18:16:29,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-14 18:16:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 18:16:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-14 18:16:29,984 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 28 [2020-10-14 18:16:29,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:16:29,986 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-14 18:16:29,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:16:29,991 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-14 18:16:29,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 18:16:29,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:29,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:29,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:16:29,995 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:29,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:29,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1357692925, now seen corresponding path program 1 times [2020-10-14 18:16:29,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:29,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128940318] [2020-10-14 18:16:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:30,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:30,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:30,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:31,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:31,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:31,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:32,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:32,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:32,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:33,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:33,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:34,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:34,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:34,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:35,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:35,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 18:16:35,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 18:16:35,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 18:16:35,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:35,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:35,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:16:35,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:16:35,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 18:16:35,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:35,677 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-14 18:16:36,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:16:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:36,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:36,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:36,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:16:36,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:36,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:16:36,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:36,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:36,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:36,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:16:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:36,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:36,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:36,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:16:36,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:36,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:16:36,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:36,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:36,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:36,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:36,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:36,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:16:36,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128940318] [2020-10-14 18:16:36,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:16:36,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:16:36,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445107588] [2020-10-14 18:16:36,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:16:36,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:16:36,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:16:36,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:16:36,346 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 19 states. [2020-10-14 18:16:37,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:16:37,425 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-14 18:16:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:16:37,427 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-10-14 18:16:37,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:16:37,434 INFO L225 Difference]: With dead ends: 74 [2020-10-14 18:16:37,434 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 18:16:37,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:16:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 18:16:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-10-14 18:16:37,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 18:16:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-10-14 18:16:37,476 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 38 [2020-10-14 18:16:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:16:37,476 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-10-14 18:16:37,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:16:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-10-14 18:16:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 18:16:37,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:37,482 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:37,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:16:37,482 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:37,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:37,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1439319237, now seen corresponding path program 2 times [2020-10-14 18:16:37,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:37,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111991513] [2020-10-14 18:16:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:37,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:37,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:37,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:37,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:42,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:42,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 18:16:42,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:16:42,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:16:42,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:42,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:42,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:16:42,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:16:42,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 18:16:42,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:42,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:16:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:42,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:42,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:42,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:16:42,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:42,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:16:42,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:42,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:42,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:42,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:42,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:42,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:16:42,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:16:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:42,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:42,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:42,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:16:42,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:42,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:16:42,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:42,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:42,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:42,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:42,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:42,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 18:16:42,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111991513] [2020-10-14 18:16:42,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:16:42,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:16:42,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23533406] [2020-10-14 18:16:42,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:16:42,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:16:42,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:16:42,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:16:42,608 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 8 states. [2020-10-14 18:16:42,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:16:42,971 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2020-10-14 18:16:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:16:42,971 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-10-14 18:16:42,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:16:42,973 INFO L225 Difference]: With dead ends: 134 [2020-10-14 18:16:42,973 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 18:16:42,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:16:42,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 18:16:42,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2020-10-14 18:16:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 18:16:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-10-14 18:16:42,997 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 40 [2020-10-14 18:16:42,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:16:42,998 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-10-14 18:16:42,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:16:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-10-14 18:16:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 18:16:43,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:43,002 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:43,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:16:43,003 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:43,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:43,004 INFO L82 PathProgramCache]: Analyzing trace with hash 360312889, now seen corresponding path program 3 times [2020-10-14 18:16:43,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:43,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334494355] [2020-10-14 18:16:43,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:43,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:43,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:43,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:43,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:43,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:43,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:45,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:45,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:45,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:46,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:46,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:46,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:47,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:47,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:47,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:47,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:48,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:48,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 18:16:48,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 18:16:48,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:16:48,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:48,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:48,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:16:48,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:16:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 18:16:48,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:48,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:16:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:48,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:48,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:48,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:16:48,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:48,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:16:48,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:48,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:48,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:48,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:48,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:48,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:48,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:16:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:48,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:48,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:48,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:16:48,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:48,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:16:48,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:48,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:48,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:48,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:48,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:48,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:16:48,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334494355] [2020-10-14 18:16:48,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:16:48,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:16:48,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303476092] [2020-10-14 18:16:48,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:16:48,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:16:48,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:16:48,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:16:48,883 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 20 states. [2020-10-14 18:16:50,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:16:50,220 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2020-10-14 18:16:50,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:16:50,224 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2020-10-14 18:16:50,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:16:50,226 INFO L225 Difference]: With dead ends: 77 [2020-10-14 18:16:50,226 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 18:16:50,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:16:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 18:16:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-14 18:16:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 18:16:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-10-14 18:16:50,245 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 42 [2020-10-14 18:16:50,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:16:50,245 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-10-14 18:16:50,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:16:50,245 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-10-14 18:16:50,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 18:16:50,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:50,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:50,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:16:50,250 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:50,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:50,250 INFO L82 PathProgramCache]: Analyzing trace with hash 719555767, now seen corresponding path program 4 times [2020-10-14 18:16:50,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:50,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782125978] [2020-10-14 18:16:50,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:50,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:50,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:50,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:50,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:50,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:50,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:53,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:53,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 18:16:53,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:16:53,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3534 [2020-10-14 18:16:53,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:53,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:53,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:16:53,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:16:53,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:16:53,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:16:53,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:16:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:53,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:53,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:53,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:16:53,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:53,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:16:53,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:53,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:53,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:53,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:53,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:53,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:16:53,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:16:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:53,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:53,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:53,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:16:53,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:53,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:16:53,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:53,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:53,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:53,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:53,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:53,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:16:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 18:16:53,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782125978] [2020-10-14 18:16:53,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:16:53,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:16:53,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367683107] [2020-10-14 18:16:53,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:16:53,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:16:53,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:16:53,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:16:53,865 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 8 states. [2020-10-14 18:16:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:16:54,192 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2020-10-14 18:16:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:16:54,193 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-14 18:16:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:16:54,194 INFO L225 Difference]: With dead ends: 69 [2020-10-14 18:16:54,194 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 18:16:54,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:16:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 18:16:54,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-10-14 18:16:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 18:16:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-14 18:16:54,205 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 44 [2020-10-14 18:16:54,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:16:54,205 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-14 18:16:54,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:16:54,206 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-14 18:16:54,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 18:16:54,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:54,207 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:54,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:16:54,207 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:54,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:54,208 INFO L82 PathProgramCache]: Analyzing trace with hash 604298867, now seen corresponding path program 5 times [2020-10-14 18:16:54,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:54,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244795747] [2020-10-14 18:16:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:54,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:54,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:54,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:55,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:56,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:56,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:56,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:57,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:57,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:57,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:58,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:58,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:59,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:59,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:59,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 18:16:59,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:16:59,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-14 18:16:59,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:59,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:59,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:16:59,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:16:59,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:16:59,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:00,239 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-14 18:17:00,489 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-14 18:17:00,739 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-14 18:17:01,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:01,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:01,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:01,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:01,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:01,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:01,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:01,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:01,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:01,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:01,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:01,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:01,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:17:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:01,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:01,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:01,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:01,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:01,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:01,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:01,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:01,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:01,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:01,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:01,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:01,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244795747] [2020-10-14 18:17:01,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:01,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:17:01,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419312787] [2020-10-14 18:17:01,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:17:01,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:01,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:17:01,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:17:01,649 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 29 states. [2020-10-14 18:17:02,388 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-14 18:17:02,561 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-14 18:17:02,776 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 51 [2020-10-14 18:17:02,953 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 42 [2020-10-14 18:17:03,236 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 49 [2020-10-14 18:17:03,478 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2020-10-14 18:17:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:05,323 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2020-10-14 18:17:05,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 18:17:05,325 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 48 [2020-10-14 18:17:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:05,326 INFO L225 Difference]: With dead ends: 135 [2020-10-14 18:17:05,326 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 18:17:05,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=308, Invalid=2242, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 18:17:05,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 18:17:05,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2020-10-14 18:17:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 18:17:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-10-14 18:17:05,341 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 48 [2020-10-14 18:17:05,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:05,342 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-10-14 18:17:05,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:17:05,342 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-10-14 18:17:05,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 18:17:05,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:05,343 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:05,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:17:05,343 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:05,344 INFO L82 PathProgramCache]: Analyzing trace with hash 701039665, now seen corresponding path program 6 times [2020-10-14 18:17:05,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:05,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645820248] [2020-10-14 18:17:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:05,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:05,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:05,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:05,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:10,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 18:17:10,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:17:10,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:17:10,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:10,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:10,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:17:10,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:17:10,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:17:10,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:10,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:10,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:10,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:10,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:10,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:10,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:10,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:10,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:10,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:10,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:10,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:10,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:17:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:10,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:10,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:10,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:10,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:17:10,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:10,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:10,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:10,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:10,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:10,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 18:17:10,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645820248] [2020-10-14 18:17:10,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:10,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:17:10,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560346499] [2020-10-14 18:17:10,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:17:10,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:10,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:17:10,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:17:10,453 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 10 states. [2020-10-14 18:17:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:10,901 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2020-10-14 18:17:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:17:10,902 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-14 18:17:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:10,907 INFO L225 Difference]: With dead ends: 179 [2020-10-14 18:17:10,908 INFO L226 Difference]: Without dead ends: 142 [2020-10-14 18:17:10,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:17:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-14 18:17:10,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 123. [2020-10-14 18:17:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 18:17:10,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2020-10-14 18:17:10,928 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 50 [2020-10-14 18:17:10,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:10,928 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2020-10-14 18:17:10,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:17:10,929 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2020-10-14 18:17:10,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 18:17:10,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:10,930 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:10,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:17:10,930 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:10,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:10,931 INFO L82 PathProgramCache]: Analyzing trace with hash -236563215, now seen corresponding path program 7 times [2020-10-14 18:17:10,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:10,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278750089] [2020-10-14 18:17:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:10,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:11,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:15,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:15,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 18:17:15,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:17:15,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 18:17:15,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:15,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:15,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:17:15,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:17:15,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:17:15,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:16,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:16,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:16,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:16,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:16,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:16,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:17:16,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:16,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:16,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:16,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:16,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:16,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:16,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:17:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:16,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:16,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:16,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:16,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:16,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:16,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:16,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:16,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:16,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:16,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:16,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 18:17:16,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278750089] [2020-10-14 18:17:16,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:16,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:17:16,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584770315] [2020-10-14 18:17:16,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:17:16,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:16,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:17:16,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:17:16,039 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand 10 states. [2020-10-14 18:17:16,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:16,687 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-10-14 18:17:16,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:17:16,688 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-14 18:17:16,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:16,689 INFO L225 Difference]: With dead ends: 144 [2020-10-14 18:17:16,689 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 18:17:16,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:17:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 18:17:16,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2020-10-14 18:17:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 18:17:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-10-14 18:17:16,705 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 50 [2020-10-14 18:17:16,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:16,705 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-10-14 18:17:16,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:17:16,705 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-10-14 18:17:16,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 18:17:16,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:16,706 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:16,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:17:16,707 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:16,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:16,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1394873015, now seen corresponding path program 1 times [2020-10-14 18:17:16,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:16,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786761459] [2020-10-14 18:17:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:16,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:16,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:17,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:17,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:17,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:18,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:18,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:19,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:21,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:21,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 18:17:21,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:17:21,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:17:21,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:21,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:21,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:17:21,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:17:21,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 18:17:21,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:22,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:22,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:22,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:22,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:22,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:22,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:22,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:22,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:22,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:22,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:22,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:22,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:22,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:17:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:22,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:22,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:22,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:22,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:22,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:22,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:22,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:22,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:22,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:22,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:22,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:22,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-14 18:17:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:22,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:22,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:22,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:22,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:22,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:17:22,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:22,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:22,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:17:22,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:22,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 18:17:22,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:17:22,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786761459] [2020-10-14 18:17:22,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:22,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:17:22,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215810671] [2020-10-14 18:17:22,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:17:22,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:22,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:17:22,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:17:22,575 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 23 states. [2020-10-14 18:17:24,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:24,253 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-10-14 18:17:24,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:17:24,255 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-10-14 18:17:24,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:24,256 INFO L225 Difference]: With dead ends: 102 [2020-10-14 18:17:24,256 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 18:17:24,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:17:24,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 18:17:24,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-14 18:17:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 18:17:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-14 18:17:24,283 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 56 [2020-10-14 18:17:24,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:24,284 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-14 18:17:24,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:17:24,284 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-14 18:17:24,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 18:17:24,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:24,286 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:24,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:17:24,286 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:24,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:24,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2023972503, now seen corresponding path program 8 times [2020-10-14 18:17:24,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:24,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682853571] [2020-10-14 18:17:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:24,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:25,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:26,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:27,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:28,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:29,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:29,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 18:17:29,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:17:29,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-14 18:17:29,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:29,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:17:29,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:17:29,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 18:17:29,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:31,006 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-14 18:17:31,167 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-14 18:17:31,351 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-14 18:17:31,718 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-14 18:17:33,078 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-14 18:17:34,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:34,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:34,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:34,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:34,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:34,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:34,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:34,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:34,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:34,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:34,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:34,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:34,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:17:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:34,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:34,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:34,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:34,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:34,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:34,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:34,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:34,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:34,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:34,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682853571] [2020-10-14 18:17:34,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:34,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 18:17:34,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290079689] [2020-10-14 18:17:34,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 18:17:34,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:34,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 18:17:34,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:17:34,167 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 39 states. [2020-10-14 18:17:35,003 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 55 [2020-10-14 18:17:36,474 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 66 [2020-10-14 18:17:36,717 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-14 18:17:37,039 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 41 [2020-10-14 18:17:37,291 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-10-14 18:17:37,704 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 66 [2020-10-14 18:17:37,999 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 70 [2020-10-14 18:17:38,249 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 44 [2020-10-14 18:17:38,497 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 63 [2020-10-14 18:17:38,748 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 56 [2020-10-14 18:17:39,037 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 69 [2020-10-14 18:17:39,917 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-14 18:17:41,254 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 48 [2020-10-14 18:17:41,633 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 53 [2020-10-14 18:17:43,037 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 44 [2020-10-14 18:17:43,509 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 51 [2020-10-14 18:17:43,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:43,603 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2020-10-14 18:17:43,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-14 18:17:43,605 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 58 [2020-10-14 18:17:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:43,606 INFO L225 Difference]: With dead ends: 143 [2020-10-14 18:17:43,606 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 18:17:43,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=668, Invalid=5652, Unknown=0, NotChecked=0, Total=6320 [2020-10-14 18:17:43,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 18:17:43,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 106. [2020-10-14 18:17:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 18:17:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2020-10-14 18:17:43,625 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 58 [2020-10-14 18:17:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:43,625 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2020-10-14 18:17:43,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 18:17:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2020-10-14 18:17:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 18:17:43,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:43,627 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:43,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:17:43,627 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:43,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:43,628 INFO L82 PathProgramCache]: Analyzing trace with hash -909586009, now seen corresponding path program 9 times [2020-10-14 18:17:43,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:43,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533936436] [2020-10-14 18:17:43,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:43,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:43,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:43,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:44,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:48,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:48,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 18:17:48,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:17:48,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 18:17:48,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:48,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:48,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:17:48,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:17:48,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:17:48,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:48,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:48,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:48,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:48,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:48,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:48,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:48,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:48,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:48,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:48,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:48,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:48,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:48,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:17:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:48,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:48,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:48,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:48,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:48,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:17:48,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:48,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:48,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-14 18:17:48,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533936436] [2020-10-14 18:17:48,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:48,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:17:48,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626349311] [2020-10-14 18:17:48,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:17:48,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:48,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:17:48,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:17:48,775 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand 12 states. [2020-10-14 18:17:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:49,621 INFO L93 Difference]: Finished difference Result 231 states and 260 transitions. [2020-10-14 18:17:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:17:49,623 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-10-14 18:17:49,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:49,625 INFO L225 Difference]: With dead ends: 231 [2020-10-14 18:17:49,625 INFO L226 Difference]: Without dead ends: 166 [2020-10-14 18:17:49,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:17:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-14 18:17:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 143. [2020-10-14 18:17:49,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 18:17:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 155 transitions. [2020-10-14 18:17:49,679 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 155 transitions. Word has length 60 [2020-10-14 18:17:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:49,680 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 155 transitions. [2020-10-14 18:17:49,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:17:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 155 transitions. [2020-10-14 18:17:49,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 18:17:49,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:49,683 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:49,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:17:49,684 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:49,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:49,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1364278181, now seen corresponding path program 10 times [2020-10-14 18:17:49,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:49,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501358245] [2020-10-14 18:17:49,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:49,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:49,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:49,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:50,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:50,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:54,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:54,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 18:17:54,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:17:54,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:17:54,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:54,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:17:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:17:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 18:17:54,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:54,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:54,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:54,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:54,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:54,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:54,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:54,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:54,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:54,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:54,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:54,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:54,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:54,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:17:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:54,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:54,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:54,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:54,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:54,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:17:54,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:54,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:54,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:54,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:54,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:54,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-14 18:17:54,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501358245] [2020-10-14 18:17:54,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:54,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:17:54,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425593958] [2020-10-14 18:17:54,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:17:54,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:54,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:17:54,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:17:54,833 INFO L87 Difference]: Start difference. First operand 143 states and 155 transitions. Second operand 12 states. [2020-10-14 18:17:55,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:55,780 INFO L93 Difference]: Finished difference Result 203 states and 217 transitions. [2020-10-14 18:17:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:17:55,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-14 18:17:55,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:55,782 INFO L225 Difference]: With dead ends: 203 [2020-10-14 18:17:55,782 INFO L226 Difference]: Without dead ends: 139 [2020-10-14 18:17:55,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:17:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-14 18:17:55,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 124. [2020-10-14 18:17:55,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 18:17:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2020-10-14 18:17:55,799 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 62 [2020-10-14 18:17:55,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:55,799 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2020-10-14 18:17:55,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:17:55,799 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2020-10-14 18:17:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:17:55,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:55,800 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:55,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:17:55,801 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:55,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:55,801 INFO L82 PathProgramCache]: Analyzing trace with hash 521427519, now seen corresponding path program 2 times [2020-10-14 18:17:55,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:55,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746597102] [2020-10-14 18:17:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:55,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:56,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:57,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:58,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:59,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:59,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:00,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:01,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:01,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 18:18:01,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:18:01,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5363 [2020-10-14 18:18:01,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:01,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:01,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:18:01,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:18:01,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 18:18:01,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:02,252 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-14 18:18:02,400 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-14 18:18:02,553 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-14 18:18:02,905 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-10-14 18:18:03,082 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-14 18:18:03,311 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 58 [2020-10-14 18:18:03,520 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-10-14 18:18:03,755 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 57 [2020-10-14 18:18:04,127 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 55 [2020-10-14 18:18:04,291 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 46 [2020-10-14 18:18:04,524 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 55 [2020-10-14 18:18:04,723 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 46 [2020-10-14 18:18:04,935 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2020-10-14 18:18:06,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:06,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:06,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:06,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:06,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:06,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:18:06,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:06,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:06,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:06,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:06,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:06,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:06,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:18:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:06,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:06,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:06,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:18:06,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:06,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:18:06,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:06,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:06,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:06,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:06,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:06,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:06,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-14 18:18:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:06,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:06,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:06,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:18:06,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:06,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:18:06,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:06,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:06,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:18:06,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:06,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:18:06,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:18:06,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746597102] [2020-10-14 18:18:06,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:06,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 18:18:06,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525531517] [2020-10-14 18:18:06,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 18:18:06,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:06,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 18:18:06,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:18:06,360 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand 39 states. [2020-10-14 18:18:06,899 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-14 18:18:07,752 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-14 18:18:08,221 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-10-14 18:18:09,934 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-14 18:18:10,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:10,775 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2020-10-14 18:18:10,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 18:18:10,776 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 66 [2020-10-14 18:18:10,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:10,777 INFO L225 Difference]: With dead ends: 131 [2020-10-14 18:18:10,777 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 18:18:10,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=239, Invalid=3543, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 18:18:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 18:18:10,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-14 18:18:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 18:18:10,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2020-10-14 18:18:10,795 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 66 [2020-10-14 18:18:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:10,795 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2020-10-14 18:18:10,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 18:18:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2020-10-14 18:18:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 18:18:10,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:10,796 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:10,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:18:10,797 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:10,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:10,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1680316193, now seen corresponding path program 11 times [2020-10-14 18:18:10,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:10,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198615044] [2020-10-14 18:18:10,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:10,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:12,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:13,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:15,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:16,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:16,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 18:18:16,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:18:16,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5397 [2020-10-14 18:18:16,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:16,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 18:18:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:18:16,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 18:18:16,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:16,812 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-14 18:18:16,947 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-14 18:18:17,104 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-14 18:18:17,263 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-14 18:18:17,516 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-14 18:18:17,668 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2020-10-14 18:18:17,841 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-14 18:18:18,148 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2020-10-14 18:18:18,378 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2020-10-14 18:18:18,666 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 66 [2020-10-14 18:18:18,941 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 64 [2020-10-14 18:18:19,243 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2020-10-14 18:18:19,561 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 73 [2020-10-14 18:18:19,857 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2020-10-14 18:18:20,163 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-10-14 18:18:20,637 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 77 [2020-10-14 18:18:21,003 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2020-10-14 18:18:21,452 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2020-10-14 18:18:21,922 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2020-10-14 18:18:22,217 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2020-10-14 18:18:22,507 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 64 [2020-10-14 18:18:22,819 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-14 18:18:23,056 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-14 18:18:23,324 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-10-14 18:18:25,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:25,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:25,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:25,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:25,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:25,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:18:25,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:25,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:25,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:25,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:25,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:18:25,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:18:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:25,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:25,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:25,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:18:25,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:25,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:18:25,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:25,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:25,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:25,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:25,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:25,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:18:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 3 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:18:26,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198615044] [2020-10-14 18:18:26,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:26,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 18:18:26,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223609879] [2020-10-14 18:18:26,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 18:18:26,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:26,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 18:18:26,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2178, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 18:18:26,037 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand 49 states. [2020-10-14 18:18:27,050 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 43 [2020-10-14 18:18:27,604 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 90 [2020-10-14 18:18:28,138 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 90 [2020-10-14 18:18:28,957 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 112 [2020-10-14 18:18:29,320 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 52 [2020-10-14 18:18:29,680 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 53 [2020-10-14 18:18:30,033 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 70 [2020-10-14 18:18:30,346 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 59 [2020-10-14 18:18:30,833 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 69 [2020-10-14 18:18:31,231 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 68 [2020-10-14 18:18:32,103 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 107 [2020-10-14 18:18:32,621 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 99 [2020-10-14 18:18:33,322 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 93 [2020-10-14 18:18:33,879 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 92 [2020-10-14 18:18:34,284 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 75 [2020-10-14 18:18:34,589 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2020-10-14 18:18:34,952 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2020-10-14 18:18:35,261 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 76 [2020-10-14 18:18:35,659 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-14 18:18:35,913 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-14 18:18:36,168 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-14 18:18:36,479 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 51 [2020-10-14 18:18:36,848 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 50 [2020-10-14 18:18:37,175 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 44 [2020-10-14 18:18:39,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:39,001 INFO L93 Difference]: Finished difference Result 165 states and 175 transitions. [2020-10-14 18:18:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-14 18:18:39,002 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 68 [2020-10-14 18:18:39,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:39,004 INFO L225 Difference]: With dead ends: 165 [2020-10-14 18:18:39,004 INFO L226 Difference]: Without dead ends: 163 [2020-10-14 18:18:39,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=529, Invalid=6113, Unknown=0, NotChecked=0, Total=6642 [2020-10-14 18:18:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-14 18:18:39,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 155. [2020-10-14 18:18:39,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 18:18:39,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 164 transitions. [2020-10-14 18:18:39,037 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 164 transitions. Word has length 68 [2020-10-14 18:18:39,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:39,037 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 164 transitions. [2020-10-14 18:18:39,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 18:18:39,037 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 164 transitions. [2020-10-14 18:18:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 18:18:39,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:39,039 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:39,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:18:39,039 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:39,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:39,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1300135011, now seen corresponding path program 12 times [2020-10-14 18:18:39,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:39,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595699227] [2020-10-14 18:18:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:39,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:39,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:39,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:39,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:44,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:44,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 18:18:44,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:18:44,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-14 18:18:44,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:44,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:44,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:18:44,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:18:44,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:18:44,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:44,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:44,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:44,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:44,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:44,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:44,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:18:44,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:44,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:44,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:44,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:44,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:44,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:18:44,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:18:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:44,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:44,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:44,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:18:44,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:44,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:18:44,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:44,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:44,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:44,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:44,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:44,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:18:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-14 18:18:44,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595699227] [2020-10-14 18:18:44,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:44,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:18:44,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904257711] [2020-10-14 18:18:44,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:18:44,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:44,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:18:44,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:18:44,291 INFO L87 Difference]: Start difference. First operand 155 states and 164 transitions. Second operand 14 states. [2020-10-14 18:18:45,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:45,406 INFO L93 Difference]: Finished difference Result 314 states and 345 transitions. [2020-10-14 18:18:45,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:18:45,408 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2020-10-14 18:18:45,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:45,410 INFO L225 Difference]: With dead ends: 314 [2020-10-14 18:18:45,411 INFO L226 Difference]: Without dead ends: 239 [2020-10-14 18:18:45,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:18:45,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-14 18:18:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 212. [2020-10-14 18:18:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-14 18:18:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 226 transitions. [2020-10-14 18:18:45,439 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 226 transitions. Word has length 70 [2020-10-14 18:18:45,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:45,440 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 226 transitions. [2020-10-14 18:18:45,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:18:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 226 transitions. [2020-10-14 18:18:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 18:18:45,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:45,441 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:45,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:18:45,441 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:45,442 INFO L82 PathProgramCache]: Analyzing trace with hash 818470165, now seen corresponding path program 3 times [2020-10-14 18:18:45,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:45,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150783646] [2020-10-14 18:18:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:45,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:45,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:46,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:46,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:47,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:48,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:48,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:49,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:49,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:50,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:50,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:50,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 18:18:50,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 18:18:50,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5158 [2020-10-14 18:18:50,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:50,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:50,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 18:18:50,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:18:50,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 18:18:50,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:51,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:51,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:51,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:51,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:51,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:51,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:18:51,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:51,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:51,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:51,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:51,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:51,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:51,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:18:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:51,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:51,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:51,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:18:51,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:51,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:18:51,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:51,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:51,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:51,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:51,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:51,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:51,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-14 18:18:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:51,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:51,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:51,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:18:51,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:51,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:18:51,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:51,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:18:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 18:18:51,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:51,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-14 18:18:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:51,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:51,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:51,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:18:51,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:51,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:18:51,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:51,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:51,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:18:51,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:51,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:18:51,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 18:18:51,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150783646] [2020-10-14 18:18:51,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:51,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:18:51,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930170107] [2020-10-14 18:18:51,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:18:51,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:51,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:18:51,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:18:51,908 INFO L87 Difference]: Start difference. First operand 212 states and 226 transitions. Second operand 24 states. [2020-10-14 18:18:54,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:54,070 INFO L93 Difference]: Finished difference Result 214 states and 227 transitions. [2020-10-14 18:18:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:18:54,071 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 74 [2020-10-14 18:18:54,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:54,073 INFO L225 Difference]: With dead ends: 214 [2020-10-14 18:18:54,073 INFO L226 Difference]: Without dead ends: 159 [2020-10-14 18:18:54,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:18:54,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-14 18:18:54,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2020-10-14 18:18:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-14 18:18:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 172 transitions. [2020-10-14 18:18:54,093 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 172 transitions. Word has length 74 [2020-10-14 18:18:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:54,093 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 172 transitions. [2020-10-14 18:18:54,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:18:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 172 transitions. [2020-10-14 18:18:54,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 18:18:54,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:54,095 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:54,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:18:54,095 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:54,095 INFO L82 PathProgramCache]: Analyzing trace with hash 45544473, now seen corresponding path program 13 times [2020-10-14 18:18:54,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:54,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886554838] [2020-10-14 18:18:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:54,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:54,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:54,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:55,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:55,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:56,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:59,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:59,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 18:18:59,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:18:59,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:18:59,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:59,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:59,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:18:59,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:18:59,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:18:59,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:59,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:59,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:59,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:59,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:59,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:59,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:18:59,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:59,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:59,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:59,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:18:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:59,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:59,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:59,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:18:59,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:59,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:18:59,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:59,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:59,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:59,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:59,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:59,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-14 18:18:59,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886554838] [2020-10-14 18:18:59,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:59,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:18:59,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695027245] [2020-10-14 18:18:59,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:18:59,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:59,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:18:59,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:18:59,282 INFO L87 Difference]: Start difference. First operand 159 states and 172 transitions. Second operand 14 states. [2020-10-14 18:19:00,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:19:00,586 INFO L93 Difference]: Finished difference Result 233 states and 250 transitions. [2020-10-14 18:19:00,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:19:00,587 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-10-14 18:19:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:19:00,588 INFO L225 Difference]: With dead ends: 233 [2020-10-14 18:19:00,589 INFO L226 Difference]: Without dead ends: 165 [2020-10-14 18:19:00,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:19:00,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-14 18:19:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 146. [2020-10-14 18:19:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-14 18:19:00,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 154 transitions. [2020-10-14 18:19:00,607 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 154 transitions. Word has length 74 [2020-10-14 18:19:00,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:19:00,607 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 154 transitions. [2020-10-14 18:19:00,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:19:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 154 transitions. [2020-10-14 18:19:00,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 18:19:00,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:19:00,608 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:19:00,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:19:00,609 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:19:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:19:00,609 INFO L82 PathProgramCache]: Analyzing trace with hash 308562869, now seen corresponding path program 4 times [2020-10-14 18:19:00,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:19:00,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119816089] [2020-10-14 18:19:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:19:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:00,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:01,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:02,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:03,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:04,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:05,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:05,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:05,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 18:19:05,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:19:05,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5278 [2020-10-14 18:19:05,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:05,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:05,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 18:19:05,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:19:05,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 18:19:05,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:07,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:19:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:07,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:07,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:07,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:19:07,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:07,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:19:07,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:07,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:07,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:19:07,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:19:07,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:19:07,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:07,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:19:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:07,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:07,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:07,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:19:07,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:07,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:19:07,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:07,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:07,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:19:07,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:19:07,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:19:07,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:07,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-14 18:19:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:07,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:07,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:07,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:19:07,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:07,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:19:07,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:07,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:07,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:19:07,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:19:07,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 18:19:07,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-14 18:19:07,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119816089] [2020-10-14 18:19:07,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:19:07,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:19:07,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380626651] [2020-10-14 18:19:07,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:19:07,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:19:07,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:19:07,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:19:07,505 INFO L87 Difference]: Start difference. First operand 146 states and 154 transitions. Second operand 24 states. [2020-10-14 18:19:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:19:09,539 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2020-10-14 18:19:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:19:09,539 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2020-10-14 18:19:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:19:09,540 INFO L225 Difference]: With dead ends: 164 [2020-10-14 18:19:09,540 INFO L226 Difference]: Without dead ends: 162 [2020-10-14 18:19:09,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:19:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-14 18:19:09,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-10-14 18:19:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-14 18:19:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 168 transitions. [2020-10-14 18:19:09,563 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 168 transitions. Word has length 76 [2020-10-14 18:19:09,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:19:09,564 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 168 transitions. [2020-10-14 18:19:09,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:19:09,564 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 168 transitions. [2020-10-14 18:19:09,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 18:19:09,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:19:09,565 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:19:09,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:19:09,565 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:19:09,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:19:09,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2040228651, now seen corresponding path program 14 times [2020-10-14 18:19:09,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:19:09,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151560994] [2020-10-14 18:19:09,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:19:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:09,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:10,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:13,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:14,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:14,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 18:19:14,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:19:14,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5134 [2020-10-14 18:19:14,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:14,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:14,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-14 18:19:14,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:19:14,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 18:19:14,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:16,151 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-14 18:19:16,303 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-14 18:19:16,511 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-10-14 18:19:16,672 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-10-14 18:19:17,091 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 56 [2020-10-14 18:19:17,497 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 56 [2020-10-14 18:19:17,826 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 57 [2020-10-14 18:19:18,143 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 57 [2020-10-14 18:19:18,528 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 58 [2020-10-14 18:19:18,827 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 58 [2020-10-14 18:19:19,199 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 61 [2020-10-14 18:19:19,531 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 61 [2020-10-14 18:19:19,921 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-14 18:19:20,235 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2020-10-14 18:19:20,667 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 69 [2020-10-14 18:19:21,051 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 59 [2020-10-14 18:19:21,483 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 65 [2020-10-14 18:19:22,013 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 77 [2020-10-14 18:19:22,372 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2020-10-14 18:19:22,833 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 73 [2020-10-14 18:19:23,216 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 64 [2020-10-14 18:19:23,693 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 71 [2020-10-14 18:19:24,023 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2020-10-14 18:19:24,364 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 63 [2020-10-14 18:19:24,737 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 58 [2020-10-14 18:19:25,302 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 70 [2020-10-14 18:19:25,760 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 63 [2020-10-14 18:19:26,273 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 69 [2020-10-14 18:19:26,694 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 60 [2020-10-14 18:19:27,197 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 64 [2020-10-14 18:19:27,620 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 57 [2020-10-14 18:19:28,095 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 63 [2020-10-14 18:19:28,468 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2020-10-14 18:19:28,964 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 63 [2020-10-14 18:19:29,251 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2020-10-14 18:19:29,678 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2020-10-14 18:19:30,005 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2020-10-14 18:19:30,310 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2020-10-14 18:19:30,849 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2020-10-14 18:19:32,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:19:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:32,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:32,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:32,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:19:32,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:32,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:19:32,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:32,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:32,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:19:32,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:19:32,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:19:32,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:32,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:19:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:32,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:32,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:32,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:19:32,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:32,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:19:32,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:32,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:32,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:19:32,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:19:32,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:19:32,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:19:32,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151560994] [2020-10-14 18:19:32,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:19:32,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-14 18:19:32,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475126506] [2020-10-14 18:19:32,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-14 18:19:32,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:19:32,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-14 18:19:32,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=3000, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 18:19:32,536 INFO L87 Difference]: Start difference. First operand 160 states and 168 transitions. Second operand 58 states. [2020-10-14 18:19:34,126 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 48 [2020-10-14 18:19:34,620 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 34 [2020-10-14 18:19:35,464 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 49 [2020-10-14 18:19:36,124 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 37 [2020-10-14 18:19:36,896 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 58 [2020-10-14 18:19:37,733 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 64 [2020-10-14 18:19:38,340 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 64 [2020-10-14 18:19:39,036 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 74 [2020-10-14 18:19:39,684 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 58 [2020-10-14 18:19:40,343 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 65 [2020-10-14 18:19:40,978 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 59 [2020-10-14 18:19:41,741 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 60 [2020-10-14 18:19:42,300 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 58 [2020-10-14 18:19:43,055 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 59 [2020-10-14 18:19:43,940 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 62 [2020-10-14 18:19:44,743 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 58 [2020-10-14 18:19:45,625 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 81 [2020-10-14 18:19:46,724 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 110 [2020-10-14 18:19:47,303 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2020-10-14 18:19:48,142 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 104 [2020-10-14 18:19:48,653 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-14 18:19:49,201 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2020-10-14 18:19:49,987 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 76 [2020-10-14 18:19:50,507 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-10-14 18:19:51,051 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-14 18:19:52,024 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 102 [2020-10-14 18:19:52,829 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 81 [2020-10-14 18:19:53,820 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 84 [2020-10-14 18:19:54,570 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 73 [2020-10-14 18:19:55,271 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 78 [2020-10-14 18:19:55,757 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-10-14 18:19:56,290 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2020-10-14 18:19:56,872 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 71 [2020-10-14 18:19:57,282 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 49 [2020-10-14 18:19:57,808 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 61 [2020-10-14 18:19:58,362 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 59 [2020-10-14 18:19:59,112 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 77 [2020-10-14 18:20:00,011 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 101 [2020-10-14 18:20:01,078 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 123 [2020-10-14 18:20:01,976 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 84 [2020-10-14 18:20:02,557 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-14 18:20:02,968 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2020-10-14 18:20:03,344 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2020-10-14 18:20:03,784 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2020-10-14 18:20:04,192 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2020-10-14 18:20:04,561 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2020-10-14 18:20:04,894 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 51 [2020-10-14 18:20:05,354 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 57 [2020-10-14 18:20:05,846 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2020-10-14 18:20:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:07,774 INFO L93 Difference]: Finished difference Result 297 states and 320 transitions. [2020-10-14 18:20:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-14 18:20:07,776 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 78 [2020-10-14 18:20:07,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:07,779 INFO L225 Difference]: With dead ends: 297 [2020-10-14 18:20:07,779 INFO L226 Difference]: Without dead ends: 238 [2020-10-14 18:20:07,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3690 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=1372, Invalid=10838, Unknown=0, NotChecked=0, Total=12210 [2020-10-14 18:20:07,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-14 18:20:07,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 217. [2020-10-14 18:20:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-14 18:20:07,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 229 transitions. [2020-10-14 18:20:07,827 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 229 transitions. Word has length 78 [2020-10-14 18:20:07,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:07,828 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 229 transitions. [2020-10-14 18:20:07,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-14 18:20:07,828 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 229 transitions. [2020-10-14 18:20:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 18:20:07,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:07,829 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:07,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:20:07,830 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:07,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:07,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1850178067, now seen corresponding path program 15 times [2020-10-14 18:20:07,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:07,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727776509] [2020-10-14 18:20:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:07,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:07,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:07,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:12,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:12,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 18:20:12,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:20:12,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-14 18:20:12,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:12,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:12,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:20:12,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:20:12,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 18:20:12,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:13,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:13,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:13,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:13,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:13,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:13,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:13,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:13,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:13,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:13,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:13,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:13,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:13,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:20:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:13,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:13,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:13,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:20:13,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:13,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:13,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:13,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:13,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:13,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:13,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:13,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-14 18:20:13,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727776509] [2020-10-14 18:20:13,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:13,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:20:13,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798093952] [2020-10-14 18:20:13,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:20:13,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:13,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:20:13,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:20:13,144 INFO L87 Difference]: Start difference. First operand 217 states and 229 transitions. Second operand 16 states.