/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:36:29,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:36:29,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:36:29,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:36:29,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:36:29,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:36:29,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:36:29,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:36:29,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:36:29,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:36:29,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:36:29,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:36:29,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:36:29,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:36:29,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:36:29,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:36:29,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:36:29,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:36:29,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:36:29,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:36:29,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:36:29,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:36:29,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:36:29,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:36:29,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:36:29,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:36:29,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:36:29,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:36:29,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:36:29,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:36:29,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:36:29,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:36:29,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:36:29,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:36:29,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:36:29,779 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:36:29,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:36:29,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:36:29,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:36:29,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:36:29,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:36:29,783 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 05:36:29,807 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:36:29,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:36:29,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:36:29,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:36:29,809 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:36:29,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:36:29,810 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:36:29,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:36:29,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:36:29,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:36:29,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:36:29,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:36:29,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:36:29,811 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:36:29,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:36:29,811 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:36:29,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:36:29,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:36:29,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:36:29,812 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:36:29,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:36:29,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:36:29,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:36:29,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:36:29,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:36:29,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:36:29,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:36:29,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:36:29,814 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:36:29,814 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:36:30,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:36:30,160 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:36:30,164 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:36:30,165 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:36:30,166 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:36:30,167 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2020-10-14 05:36:30,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02bd6e9da/980a65657e9f4ab9ad2a1f1201563b77/FLAG94e64453a [2020-10-14 05:36:30,704 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:36:30,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/linear_search.c [2020-10-14 05:36:30,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02bd6e9da/980a65657e9f4ab9ad2a1f1201563b77/FLAG94e64453a [2020-10-14 05:36:31,115 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02bd6e9da/980a65657e9f4ab9ad2a1f1201563b77 [2020-10-14 05:36:31,125 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:36:31,128 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:36:31,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:36:31,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:36:31,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:36:31,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:36:31" (1/1) ... [2020-10-14 05:36:31,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4076c4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:31, skipping insertion in model container [2020-10-14 05:36:31,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:36:31" (1/1) ... [2020-10-14 05:36:31,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:36:31,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:36:31,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:36:31,357 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:36:31,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:36:31,393 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:36:31,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:31 WrapperNode [2020-10-14 05:36:31,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:36:31,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:36:31,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:36:31,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:36:31,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:31" (1/1) ... [2020-10-14 05:36:31,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:31" (1/1) ... [2020-10-14 05:36:31,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:31" (1/1) ... [2020-10-14 05:36:31,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:31" (1/1) ... [2020-10-14 05:36:31,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:31" (1/1) ... [2020-10-14 05:36:31,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:31" (1/1) ... [2020-10-14 05:36:31,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:31" (1/1) ... [2020-10-14 05:36:31,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:36:31,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:36:31,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:36:31,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:36:31,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:31" (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 05:36:31,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:36:31,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:36:31,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:36:31,605 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2020-10-14 05:36:31,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:36:31,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:36:31,605 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 05:36:31,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:36:31,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 05:36:31,606 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2020-10-14 05:36:31,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 05:36:31,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:36:31,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 05:36:31,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 05:36:31,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:36:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:36:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:36:31,861 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:36:31,862 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:36:31,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:36:31 BoogieIcfgContainer [2020-10-14 05:36:31,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:36:31,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:36:31,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:36:31,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:36:31,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:36:31" (1/3) ... [2020-10-14 05:36:31,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b710ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:36:31, skipping insertion in model container [2020-10-14 05:36:31,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:31" (2/3) ... [2020-10-14 05:36:31,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b710ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:36:31, skipping insertion in model container [2020-10-14 05:36:31,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:36:31" (3/3) ... [2020-10-14 05:36:31,875 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_search.c [2020-10-14 05:36:31,889 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:36:31,896 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:36:31,924 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:36:31,985 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:36:31,986 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:36:31,986 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:36:31,986 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:36:31,991 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:36:31,991 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:36:31,991 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:36:31,992 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:36:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-14 05:36:32,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:36:32,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:32,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:36:32,024 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:32,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:32,031 INFO L82 PathProgramCache]: Analyzing trace with hash 868129876, now seen corresponding path program 1 times [2020-10-14 05:36:32,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:32,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481000613] [2020-10-14 05:36:32,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:32,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:32,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:32,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:32,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:36:32,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:36:32,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-14 05:36:32,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:32,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:32,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:32,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:36:32,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:32,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:36:32,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:32,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:32,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:32,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:32,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:32,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 05:36:32,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:32,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:32,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:32,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:32,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:32,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:32,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:32,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:32,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:32,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 05:36:32,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:32,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 05:36:32,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:32,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:32,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:32,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-14 05:36:32,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:32,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:32,989 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 05:36:32,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481000613] [2020-10-14 05:36:32,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:36:32,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:36:32,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690914383] [2020-10-14 05:36:33,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:36:33,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:33,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:36:33,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:36:33,022 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-14 05:36:33,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:33,147 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-10-14 05:36:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:36:33,150 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-14 05:36:33,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:33,170 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:36:33,170 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:36:33,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:36:33,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:36:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 05:36:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:36:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-14 05:36:33,231 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-10-14 05:36:33,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:33,233 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-14 05:36:33,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:36:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-14 05:36:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:36:33,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:33,236 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] [2020-10-14 05:36:33,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:36:33,237 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:33,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:33,238 INFO L82 PathProgramCache]: Analyzing trace with hash -202652409, now seen corresponding path program 1 times [2020-10-14 05:36:33,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:33,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705561280] [2020-10-14 05:36:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:33,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:33,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:33,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:36:33,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:33,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-14 05:36:33,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:33,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:33,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:36:33,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 05:36:33,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:36:33,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:33,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:33,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:33,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:33,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:33,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:33,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:36:33,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:33,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:33,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:33,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:33,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:33,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:33,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:33,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:33,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:33,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 05:36:33,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:33,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-14 05:36:33,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:33,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:33,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:36:33,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:33,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:36:33,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:33,825 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 05:36:33,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705561280] [2020-10-14 05:36:33,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:36:33,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 05:36:33,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163214715] [2020-10-14 05:36:33,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:36:33,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:33,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:36:33,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:36:33,828 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-10-14 05:36:33,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:34,000 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-14 05:36:34,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:36:34,000 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-14 05:36:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:34,002 INFO L225 Difference]: With dead ends: 30 [2020-10-14 05:36:34,002 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:36:34,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:36:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:36:34,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 05:36:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:36:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-14 05:36:34,010 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 20 [2020-10-14 05:36:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:34,010 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-14 05:36:34,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:36:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-14 05:36:34,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:36:34,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:34,012 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] [2020-10-14 05:36:34,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:36:34,012 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:34,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1540157926, now seen corresponding path program 1 times [2020-10-14 05:36:34,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:34,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460318845] [2020-10-14 05:36:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:34,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:34,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:34,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:34,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:34,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:36:34,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:34,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-14 05:36:34,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:34,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:34,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:36:34,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:36:34,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:36:34,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:34,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:34,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:34,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:34,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:34,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:34,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:36:34,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:34,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:34,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:34,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:34,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:34,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:34,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:34,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:34,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:34,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:34,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 05:36:34,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:36:34,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-14 05:36:34,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:34,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:34,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:36:34,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:36:34,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:36:34,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:34,588 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 05:36:34,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460318845] [2020-10-14 05:36:34,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:36:34,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 05:36:34,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627925378] [2020-10-14 05:36:34,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:36:34,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:34,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:36:34,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:36:34,591 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-10-14 05:36:34,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:34,756 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-14 05:36:34,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:36:34,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 05:36:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:34,757 INFO L225 Difference]: With dead ends: 34 [2020-10-14 05:36:34,758 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 05:36:34,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:36:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 05:36:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 05:36:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:36:34,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-14 05:36:34,766 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2020-10-14 05:36:34,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:34,766 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-14 05:36:34,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:36:34,767 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-14 05:36:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:36:34,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:34,768 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] [2020-10-14 05:36:34,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:36:34,768 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:34,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1697189824, now seen corresponding path program 1 times [2020-10-14 05:36:34,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:34,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567088979] [2020-10-14 05:36:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:34,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:34,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:34,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:35,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:35,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:36:35,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:35,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 539 [2020-10-14 05:36:35,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:35,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:35,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:36:35,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:36:35,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:36:35,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:35,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:35,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:35,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:35,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:35,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:35,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:36:35,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:35,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:35,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:35,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:35,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:35,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:35,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:35,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:35,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:35,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:35,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:35,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:36:35,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:35,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-14 05:36:35,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:35,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:35,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:36:35,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:36:35,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:36:35,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:36:35,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567088979] [2020-10-14 05:36:35,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:36:35,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:36:35,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459034298] [2020-10-14 05:36:35,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:36:35,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:35,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:36:35,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:36:35,616 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-14 05:36:35,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:35,761 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-10-14 05:36:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:36:35,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-14 05:36:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:35,766 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:36:35,766 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 05:36:35,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:36:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 05:36:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2020-10-14 05:36:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 05:36:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-14 05:36:35,774 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 24 [2020-10-14 05:36:35,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:35,775 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-14 05:36:35,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:36:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-14 05:36:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:36:35,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:35,776 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] [2020-10-14 05:36:35,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:36:35,777 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:35,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1439024386, now seen corresponding path program 1 times [2020-10-14 05:36:35,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:35,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241926642] [2020-10-14 05:36:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:35,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:35,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:36,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:36,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:36:36,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:36:36,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-14 05:36:36,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:36,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:36,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:36:36,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:36:36,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:36:36,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:36,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:36,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:36,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:36,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:36,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:36,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:36:36,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:36,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:36,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:36,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:36,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:36,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:36,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:36,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:36,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:36,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:36,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:36:36,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:36:36,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-14 05:36:36,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:36,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:36,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:36:36,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:36:36,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:36:36,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 13 [2020-10-14 05:36:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:36:36,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241926642] [2020-10-14 05:36:36,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:36:36,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:36:36,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193342392] [2020-10-14 05:36:36,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:36:36,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:36,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:36:36,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:36:36,690 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2020-10-14 05:36:37,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:37,010 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-10-14 05:36:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:36:37,011 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-14 05:36:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:37,012 INFO L225 Difference]: With dead ends: 37 [2020-10-14 05:36:37,012 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:36:37,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:36:37,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:36:37,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-14 05:36:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:36:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-14 05:36:37,019 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2020-10-14 05:36:37,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:37,020 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-14 05:36:37,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:36:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-14 05:36:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:36:37,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:37,021 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:36:37,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:36:37,021 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:37,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:37,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1832051396, now seen corresponding path program 1 times [2020-10-14 05:36:37,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:37,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007268742] [2020-10-14 05:36:37,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:37,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:37,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:37,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:37,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:37,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:36:37,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:37,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 650 [2020-10-14 05:36:37,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:37,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:37,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:36:37,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:36:37,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:36:37,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:37,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:37,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:37,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:37,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:37,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:37,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:36:37,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:37,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:37,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:37,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:37,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:37,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:37,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:37,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:37,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:37,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:37,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:37,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:36:37,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:37,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-14 05:36:37,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:37,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:37,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:36:37,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:36:37,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:36:37,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:36:37,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007268742] [2020-10-14 05:36:37,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:36:37,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:36:37,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361256342] [2020-10-14 05:36:37,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:36:37,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:37,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:36:37,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:36:37,959 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-10-14 05:36:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:38,209 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-14 05:36:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:36:38,211 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-14 05:36:38,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:38,213 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:36:38,214 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 05:36:38,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:36:38,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 05:36:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-14 05:36:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 05:36:38,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-14 05:36:38,227 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2020-10-14 05:36:38,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:38,228 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-14 05:36:38,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:36:38,228 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-14 05:36:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:36:38,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:38,230 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:36:38,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:36:38,231 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:38,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:38,231 INFO L82 PathProgramCache]: Analyzing trace with hash -648228970, now seen corresponding path program 1 times [2020-10-14 05:36:38,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:38,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993770680] [2020-10-14 05:36:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:38,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:38,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:38,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:36:38,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:38,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-14 05:36:38,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:38,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:38,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:36:38,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:36:38,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:36:38,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:38,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:38,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:38,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:38,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:38,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:38,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:36:38,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:38,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:38,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:38,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:38,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:38,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:38,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:38,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:38,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:38,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:36:38,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:38,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-14 05:36:38,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:38,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:38,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:36:38,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:36:38,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:36:38,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:36:38,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993770680] [2020-10-14 05:36:38,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:36:38,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:36:38,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442049203] [2020-10-14 05:36:38,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:36:38,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:38,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:36:38,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:36:38,597 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2020-10-14 05:36:38,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:38,811 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-10-14 05:36:38,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:36:38,812 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-14 05:36:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:38,813 INFO L225 Difference]: With dead ends: 52 [2020-10-14 05:36:38,813 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 05:36:38,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:36:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 05:36:38,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-10-14 05:36:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:36:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-14 05:36:38,829 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2020-10-14 05:36:38,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:38,831 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-14 05:36:38,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:36:38,831 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-14 05:36:38,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:36:38,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:38,832 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:36:38,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:36:38,833 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:38,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:38,833 INFO L82 PathProgramCache]: Analyzing trace with hash -390063532, now seen corresponding path program 2 times [2020-10-14 05:36:38,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:38,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380971172] [2020-10-14 05:36:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:38,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:39,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:39,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:40,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:40,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:36:40,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:40,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1976 [2020-10-14 05:36:40,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:40,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:40,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:36:40,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:36:40,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:36:40,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 05:36:41,151 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 24 [2020-10-14 05:36:41,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:41,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:41,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:41,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:41,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:41,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:36:41,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:41,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:41,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:41,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:41,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:41,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:41,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:41,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:41,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:41,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:41,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:41,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:36:41,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:41,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 731 [2020-10-14 05:36:41,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:41,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:41,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:36:41,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:36:41,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:36:41,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:36:42,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380971172] [2020-10-14 05:36:42,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:36:42,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:36:42,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31704907] [2020-10-14 05:36:42,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:36:42,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:42,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:36:42,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:36:42,371 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 10 states. [2020-10-14 05:36:43,080 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-14 05:36:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:43,613 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-14 05:36:43,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:36:43,614 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 05:36:43,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:43,615 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:36:43,615 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 05:36:43,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:36:43,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 05:36:43,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-14 05:36:43,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 05:36:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-14 05:36:43,624 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-10-14 05:36:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:43,625 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-14 05:36:43,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:36:43,625 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-14 05:36:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:36:43,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:43,626 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:36:43,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:36:43,627 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:43,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:43,627 INFO L82 PathProgramCache]: Analyzing trace with hash -723812178, now seen corresponding path program 2 times [2020-10-14 05:36:43,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:43,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653499740] [2020-10-14 05:36:43,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:43,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:43,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:43,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:36:43,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:43,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-14 05:36:43,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:43,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:43,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:36:43,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:36:43,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:36:43,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:43,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:43,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:43,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:43,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:43,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:43,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:36:43,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:43,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:43,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:43,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:43,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:43,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:43,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:43,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:44,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:44,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:36:44,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:44,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-14 05:36:44,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:44,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:44,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:36:44,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:36:44,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:36:44,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:36:44,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653499740] [2020-10-14 05:36:44,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:36:44,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:36:44,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130277637] [2020-10-14 05:36:44,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:36:44,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:44,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:36:44,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:36:44,073 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 7 states. [2020-10-14 05:36:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:44,300 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-10-14 05:36:44,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:36:44,301 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-14 05:36:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:44,303 INFO L225 Difference]: With dead ends: 56 [2020-10-14 05:36:44,303 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 05:36:44,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:36:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 05:36:44,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-10-14 05:36:44,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 05:36:44,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-14 05:36:44,318 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2020-10-14 05:36:44,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:44,318 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-14 05:36:44,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:36:44,319 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-14 05:36:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:36:44,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:44,324 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:36:44,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:36:44,327 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:44,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:44,328 INFO L82 PathProgramCache]: Analyzing trace with hash -465646740, now seen corresponding path program 3 times [2020-10-14 05:36:44,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:44,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820848365] [2020-10-14 05:36:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:44,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:44,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:44,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:45,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:45,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:36:45,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:45,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1451 [2020-10-14 05:36:45,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:45,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:45,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:36:45,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:36:45,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:36:45,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:46,116 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 27 [2020-10-14 05:36:46,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:46,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:46,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:46,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:46,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:46,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:36:46,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:46,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:46,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:46,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:46,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:46,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:46,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:46,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:46,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:46,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:46,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:46,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:36:46,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:46,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-14 05:36:46,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:46,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:46,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:36:46,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:36:46,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:36:46,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:36:47,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820848365] [2020-10-14 05:36:47,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:36:47,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:36:47,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387565261] [2020-10-14 05:36:47,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:36:47,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:47,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:36:47,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:36:47,096 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2020-10-14 05:36:47,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:47,865 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-14 05:36:47,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:36:47,866 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-14 05:36:47,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:47,867 INFO L225 Difference]: With dead ends: 56 [2020-10-14 05:36:47,868 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 05:36:47,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:36:47,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 05:36:47,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-14 05:36:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:36:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-14 05:36:47,882 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2020-10-14 05:36:47,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:47,883 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-14 05:36:47,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:36:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-14 05:36:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:36:47,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:47,886 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:36:47,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:36:47,886 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:47,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:47,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1595152954, now seen corresponding path program 3 times [2020-10-14 05:36:47,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:47,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279413818] [2020-10-14 05:36:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:47,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:48,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:48,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:36:48,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:48,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-14 05:36:48,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:48,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:48,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:36:48,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:36:48,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:36:48,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:36:48,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:48,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:48,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:48,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:48,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:48,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:36:48,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:48,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:48,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:48,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:48,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:48,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:48,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:48,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:48,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:48,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:36:48,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:48,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-14 05:36:48,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:48,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:48,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:36:48,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:36:48,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:36:48,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:36:48,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279413818] [2020-10-14 05:36:48,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:36:48,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:36:48,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279007446] [2020-10-14 05:36:48,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:36:48,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:48,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:36:48,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:36:48,411 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 8 states. [2020-10-14 05:36:48,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:48,653 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-14 05:36:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:36:48,654 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-14 05:36:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:48,655 INFO L225 Difference]: With dead ends: 60 [2020-10-14 05:36:48,655 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 05:36:48,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:36:48,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 05:36:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-10-14 05:36:48,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:36:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-14 05:36:48,667 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2020-10-14 05:36:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:48,667 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-14 05:36:48,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:36:48,668 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-14 05:36:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:36:48,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:48,668 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:36:48,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:36:48,669 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1336987516, now seen corresponding path program 4 times [2020-10-14 05:36:48,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:48,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180129741] [2020-10-14 05:36:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:48,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:49,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:49,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:49,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:50,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:50,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:53,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:53,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:36:53,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:36:53,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 05:36:53,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:53,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:53,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:36:53,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:36:53,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:36:53,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 05:36:58,136 WARN L193 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 146 DAG size of output: 25 [2020-10-14 05:36:58,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:58,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:58,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:58,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:58,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:58,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:36:58,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:58,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:58,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:58,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:58,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:58,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:58,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:58,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:58,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:58,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:58,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:59,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:00,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:37:00,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:37:00,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:37:00,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2474 [2020-10-14 05:37:00,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:37:00,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:37:00,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:37:00,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:37:00,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:37:00,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:37:01,155 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 37 [2020-10-14 05:37:01,469 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-14 05:37:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:37:01,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180129741] [2020-10-14 05:37:01,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:37:01,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:37:01,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693154137] [2020-10-14 05:37:01,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:37:01,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:37:01,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:37:01,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:37:01,649 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 12 states. [2020-10-14 05:37:02,589 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-14 05:37:02,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:37:02,693 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-14 05:37:02,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:37:02,694 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-14 05:37:02,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:37:02,695 INFO L225 Difference]: With dead ends: 52 [2020-10-14 05:37:02,695 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 05:37:02,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:37:02,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 05:37:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-14 05:37:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:37:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-14 05:37:02,707 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 36 [2020-10-14 05:37:02,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:37:02,708 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-14 05:37:02,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:37:02,712 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-14 05:37:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:37:02,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:37:02,712 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:37:02,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:37:02,713 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:37:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:37:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1972633310, now seen corresponding path program 4 times [2020-10-14 05:37:02,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:37:02,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955272727] [2020-10-14 05:37:02,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:37:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:37:02,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:03,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:37:03,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:37:03,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:37:03,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-14 05:37:03,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:37:03,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:37:03,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:37:03,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:37:03,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:37:03,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:37:03,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:37:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:37:03,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:03,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:37:03,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:37:03,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:37:03,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:37:03,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:37:03,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:37:03,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:37:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:37:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:37:03,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:37:03,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:37:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:37:03,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:03,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:37:03,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:37:03,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:37:03,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-14 05:37:03,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:37:03,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:37:03,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:37:03,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:37:03,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:37:03,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:37:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:37:03,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955272727] [2020-10-14 05:37:03,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:37:03,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:37:03,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478424153] [2020-10-14 05:37:03,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:37:03,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:37:03,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:37:03,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:37:03,485 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 9 states. [2020-10-14 05:37:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:37:03,950 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-10-14 05:37:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:37:03,951 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-14 05:37:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:37:03,952 INFO L225 Difference]: With dead ends: 64 [2020-10-14 05:37:03,952 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 05:37:03,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:37:03,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 05:37:03,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-10-14 05:37:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 05:37:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-14 05:37:03,970 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 40 [2020-10-14 05:37:03,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:37:03,970 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-14 05:37:03,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:37:03,971 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-14 05:37:03,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:37:03,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:37:03,973 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:37:03,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:37:03,973 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:37:03,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:37:03,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2064168548, now seen corresponding path program 5 times [2020-10-14 05:37:03,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:37:03,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456078818] [2020-10-14 05:37:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:37:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:37:04,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:04,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:04,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:04,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:05,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:05,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:06,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:06,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:06,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:09,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:37:09,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:37:09,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 05:37:09,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:37:09,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:37:09,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:37:09,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:37:09,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:37:09,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:37:09,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:37:11,331 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 160 DAG size of output: 25 [2020-10-14 05:37:11,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:37:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:37:11,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:11,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:37:11,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:37:11,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:37:11,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:37:11,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:37:11,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:37:11,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:37:11,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:37:11,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:37:11,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:37:11,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:37:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:37:11,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:11,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:11,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:11,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:12,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:13,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:13,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:13,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:13,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:16,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:37:16,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:37:16,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 05:37:16,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:37:16,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:37:16,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:37:16,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:37:16,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:37:16,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:37:16,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:37:16,847 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2020-10-14 05:37:17,208 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-10-14 05:37:17,432 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2020-10-14 05:37:46,809 WARN L193 SmtUtils]: Spent 22.94 s on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2020-10-14 05:38:10,109 WARN L193 SmtUtils]: Spent 18.94 s on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2020-10-14 05:38:10,398 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-14 05:38:10,641 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-14 05:38:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:38:10,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456078818] [2020-10-14 05:38:10,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:38:10,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:38:10,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288051267] [2020-10-14 05:38:10,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:38:10,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:10,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:38:10,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=176, Unknown=4, NotChecked=0, Total=210 [2020-10-14 05:38:10,680 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 15 states. [2020-10-14 05:38:24,572 WARN L193 SmtUtils]: Spent 4.29 s on a formula simplification that was a NOOP. DAG size: 87 [2020-10-14 05:39:41,530 WARN L193 SmtUtils]: Spent 1.18 m on a formula simplification. DAG size of input: 163 DAG size of output: 124