/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:02:28,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:02:28,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:02:28,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:02:28,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:02:28,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:02:28,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:02:28,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:02:28,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:02:28,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:02:28,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:02:28,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:02:28,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:02:28,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:02:28,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:02:28,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:02:28,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:02:28,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:02:28,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:02:28,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:02:28,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:02:28,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:02:28,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:02:28,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:02:28,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:02:28,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:02:28,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:02:28,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:02:28,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:02:28,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:02:28,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:02:28,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:02:28,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:02:28,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:02:28,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:02:28,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:02:28,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:02:28,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:02:28,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:02:28,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:02:28,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:02:28,629 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:02:28,655 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:02:28,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:02:28,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:02:28,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:02:28,657 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:02:28,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:02:28,657 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:02:28,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:02:28,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:02:28,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:02:28,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:02:28,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:02:28,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:02:28,658 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:02:28,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:02:28,659 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:02:28,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:02:28,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:02:28,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:02:28,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:02:28,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:02:28,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:02:28,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:02:28,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:02:28,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:02:28,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:02:28,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:02:28,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:02:28,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:02:28,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:02:29,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:02:29,107 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:02:29,115 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:02:29,118 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:02:29,121 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:02:29,122 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label21.c [2020-10-13 10:02:29,233 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43e18a1e3/a702307f7f4743aab5dc4484e07c06f3/FLAG12a8f9e86 [2020-10-13 10:02:30,329 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:02:30,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label21.c [2020-10-13 10:02:30,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43e18a1e3/a702307f7f4743aab5dc4484e07c06f3/FLAG12a8f9e86 [2020-10-13 10:02:30,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43e18a1e3/a702307f7f4743aab5dc4484e07c06f3 [2020-10-13 10:02:30,687 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:02:30,690 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:02:30,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:02:30,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:02:30,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:02:30,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:02:30" (1/1) ... [2020-10-13 10:02:30,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37d4521a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:30, skipping insertion in model container [2020-10-13 10:02:30,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:02:30" (1/1) ... [2020-10-13 10:02:30,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:02:30,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:02:33,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:02:33,380 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:02:34,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:02:34,484 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:02:34,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:34 WrapperNode [2020-10-13 10:02:34,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:02:34,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:02:34,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:02:34,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:02:34,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:34" (1/1) ... [2020-10-13 10:02:34,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:34" (1/1) ... [2020-10-13 10:02:34,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:34" (1/1) ... [2020-10-13 10:02:34,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:34" (1/1) ... [2020-10-13 10:02:34,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:34" (1/1) ... [2020-10-13 10:02:34,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:34" (1/1) ... [2020-10-13 10:02:34,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:34" (1/1) ... [2020-10-13 10:02:34,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:02:34,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:02:34,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:02:34,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:02:34,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:02:35,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:02:35,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:02:35,022 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:02:35,022 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:02:35,023 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:02:35,024 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:02:35,025 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:02:35,026 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:02:35,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:02:35,026 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:02:35,026 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:02:35,027 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:02:35,027 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:02:35,027 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:02:35,027 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:02:35,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:02:35,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:02:35,029 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:02:35,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:02:35,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:02:35,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:02:47,704 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:02:47,705 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:02:47,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:02:47 BoogieIcfgContainer [2020-10-13 10:02:47,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:02:47,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:02:47,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:02:47,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:02:47,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:02:30" (1/3) ... [2020-10-13 10:02:47,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55445f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:02:47, skipping insertion in model container [2020-10-13 10:02:47,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:34" (2/3) ... [2020-10-13 10:02:47,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55445f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:02:47, skipping insertion in model container [2020-10-13 10:02:47,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:02:47" (3/3) ... [2020-10-13 10:02:47,734 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label21.c [2020-10-13 10:02:47,746 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:02:47,758 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:02:47,772 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:02:47,804 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:02:47,804 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:02:47,804 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:02:47,805 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:02:47,805 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:02:47,805 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:02:47,805 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:02:47,805 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:02:47,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:02:47,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:02:47,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:02:47,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:02:47,856 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:02:47,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:02:47,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1743616572, now seen corresponding path program 1 times [2020-10-13 10:02:47,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:02:47,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087257769] [2020-10-13 10:02:47,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:02:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:48,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:48,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:48,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:02:48,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:02:48,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-13 10:02:48,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:48,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:02:48,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:02:48,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:02:48,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:02:48,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:02:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:48,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:48,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:48,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:02:48,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:02:48,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 10:02:48,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:48,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:02:48,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:02:48,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:02:48,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:02:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:02:48,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087257769] [2020-10-13 10:02:48,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:02:48,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:02:48,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018071491] [2020-10-13 10:02:48,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:02:48,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:02:48,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:02:48,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:02:48,600 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 10:03:11,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:03:11,252 INFO L93 Difference]: Finished difference Result 5031 states and 9453 transitions. [2020-10-13 10:03:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:03:11,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-13 10:03:11,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:03:11,296 INFO L225 Difference]: With dead ends: 5031 [2020-10-13 10:03:11,297 INFO L226 Difference]: Without dead ends: 3190 [2020-10-13 10:03:11,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:03:11,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2020-10-13 10:03:11,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3184. [2020-10-13 10:03:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3184 states. [2020-10-13 10:03:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 4965 transitions. [2020-10-13 10:03:11,489 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 4965 transitions. Word has length 21 [2020-10-13 10:03:11,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:03:11,490 INFO L479 AbstractCegarLoop]: Abstraction has 3184 states and 4965 transitions. [2020-10-13 10:03:11,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:03:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 4965 transitions. [2020-10-13 10:03:11,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 10:03:11,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:03:11,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:03:11,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:03:11,496 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:03:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:03:11,496 INFO L82 PathProgramCache]: Analyzing trace with hash 265690715, now seen corresponding path program 1 times [2020-10-13 10:03:11,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:03:11,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106034208] [2020-10-13 10:03:11,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:03:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:11,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:11,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:11,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:12,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:13,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:13,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 10:03:13,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:03:13,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1963 [2020-10-13 10:03:13,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:13,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:03:13,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 10:03:13,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:03:13,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 10:03:13,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:03:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:13,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:13,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:13,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:03:13,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:13,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:03:13,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:13,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:03:13,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:03:13,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:03:13,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:13,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:03:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:13,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:13,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:13,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:03:13,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:13,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-13 10:03:13,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:13,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:03:13,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 10:03:13,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:03:13,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:03:13,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106034208] [2020-10-13 10:03:13,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:03:13,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:03:13,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700555713] [2020-10-13 10:03:13,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:03:13,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:03:13,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:03:13,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:03:13,728 INFO L87 Difference]: Start difference. First operand 3184 states and 4965 transitions. Second operand 5 states. [2020-10-13 10:03:47,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:03:47,015 INFO L93 Difference]: Finished difference Result 9218 states and 14512 transitions. [2020-10-13 10:03:47,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:03:47,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 94 [2020-10-13 10:03:47,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:03:47,053 INFO L225 Difference]: With dead ends: 9218 [2020-10-13 10:03:47,054 INFO L226 Difference]: Without dead ends: 6040 [2020-10-13 10:03:47,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:03:47,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6040 states. [2020-10-13 10:03:47,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6040 to 6024. [2020-10-13 10:03:47,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6024 states. [2020-10-13 10:03:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 8359 transitions. [2020-10-13 10:03:47,215 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 8359 transitions. Word has length 94 [2020-10-13 10:03:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:03:47,215 INFO L479 AbstractCegarLoop]: Abstraction has 6024 states and 8359 transitions. [2020-10-13 10:03:47,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:03:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 8359 transitions. [2020-10-13 10:03:47,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 10:03:47,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:03:47,218 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:03:47,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:03:47,218 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:03:47,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:03:47,219 INFO L82 PathProgramCache]: Analyzing trace with hash -551957735, now seen corresponding path program 1 times [2020-10-13 10:03:47,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:03:47,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63690602] [2020-10-13 10:03:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:03:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:47,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:47,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:47,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:48,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:48,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:48,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 10:03:48,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:03:48,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 936 [2020-10-13 10:03:48,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:48,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:03:48,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 10:03:48,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:03:48,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:48,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:03:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:48,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:48,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:48,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:03:48,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:48,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:03:48,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:48,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:03:48,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:03:48,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:03:48,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:48,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:03:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:48,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:48,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:48,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:03:48,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:48,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-13 10:03:48,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:48,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:03:48,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:03:48,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 10:03:48,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:03:48,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63690602] [2020-10-13 10:03:48,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:03:48,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:03:48,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894011777] [2020-10-13 10:03:48,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:03:48,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:03:48,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:03:48,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:03:48,630 INFO L87 Difference]: Start difference. First operand 6024 states and 8359 transitions. Second operand 5 states. [2020-10-13 10:04:26,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:04:26,365 INFO L93 Difference]: Finished difference Result 14872 states and 21405 transitions. [2020-10-13 10:04:26,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:04:26,368 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 94 [2020-10-13 10:04:26,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:04:26,405 INFO L225 Difference]: With dead ends: 14872 [2020-10-13 10:04:26,406 INFO L226 Difference]: Without dead ends: 8854 [2020-10-13 10:04:26,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:04:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8854 states. [2020-10-13 10:04:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8854 to 8845. [2020-10-13 10:04:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8845 states. [2020-10-13 10:04:26,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8845 states to 8845 states and 11623 transitions. [2020-10-13 10:04:26,650 INFO L78 Accepts]: Start accepts. Automaton has 8845 states and 11623 transitions. Word has length 94 [2020-10-13 10:04:26,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:04:26,651 INFO L479 AbstractCegarLoop]: Abstraction has 8845 states and 11623 transitions. [2020-10-13 10:04:26,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:04:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 8845 states and 11623 transitions. [2020-10-13 10:04:26,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 10:04:26,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:04:26,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:04:26,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:04:26,667 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:04:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:04:26,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1779419438, now seen corresponding path program 1 times [2020-10-13 10:04:26,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:04:26,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568785376] [2020-10-13 10:04:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:04:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:26,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:26,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:27,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:27,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 10:04:27,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:04:27,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 613 [2020-10-13 10:04:27,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:27,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:04:27,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 10:04:27,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:04:27,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:04:27,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:04:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:27,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:27,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:27,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:04:27,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:04:27,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:04:27,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:27,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:04:27,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:04:27,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:04:27,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:04:27,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:04:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:27,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:27,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:27,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:04:27,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:04:27,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-13 10:04:27,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:27,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:04:27,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:04:27,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 10:04:27,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:04:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:04:27,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568785376] [2020-10-13 10:04:27,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:04:27,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:04:27,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234416050] [2020-10-13 10:04:27,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:04:27,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:04:27,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:04:27,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:04:27,619 INFO L87 Difference]: Start difference. First operand 8845 states and 11623 transitions. Second operand 5 states. [2020-10-13 10:05:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:05:14,348 INFO L93 Difference]: Finished difference Result 20530 states and 28023 transitions. [2020-10-13 10:05:14,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:05:14,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-10-13 10:05:14,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:05:14,410 INFO L225 Difference]: With dead ends: 20530 [2020-10-13 10:05:14,411 INFO L226 Difference]: Without dead ends: 11691 [2020-10-13 10:05:14,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:05:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11691 states. [2020-10-13 10:05:14,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11691 to 11684. [2020-10-13 10:05:14,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11684 states. [2020-10-13 10:05:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11684 states to 11684 states and 14951 transitions. [2020-10-13 10:05:14,813 INFO L78 Accepts]: Start accepts. Automaton has 11684 states and 14951 transitions. Word has length 102 [2020-10-13 10:05:14,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:05:14,815 INFO L479 AbstractCegarLoop]: Abstraction has 11684 states and 14951 transitions. [2020-10-13 10:05:14,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:05:14,815 INFO L276 IsEmpty]: Start isEmpty. Operand 11684 states and 14951 transitions. [2020-10-13 10:05:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 10:05:14,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:05:14,829 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:05:14,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:05:14,829 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:05:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:05:14,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1082253694, now seen corresponding path program 1 times [2020-10-13 10:05:14,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:05:14,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902366938] [2020-10-13 10:05:14,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:05:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:14,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:15,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:15,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:15,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 10:05:15,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:05:15,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1092 [2020-10-13 10:05:15,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:05:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 130 [2020-10-13 10:05:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:05:15,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:05:16,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:05:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:16,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:16,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:16,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:05:16,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:05:16,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:05:16,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:16,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:05:16,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:05:16,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:05:16,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:05:16,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:05:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:16,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:16,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:16,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 10:05:16,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:05:16,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-13 10:05:16,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:16,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:05:16,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:05:16,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-13 10:05:16,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:05:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:05:16,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902366938] [2020-10-13 10:05:16,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:05:16,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:05:16,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424138677] [2020-10-13 10:05:16,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:05:16,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:05:16,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:05:16,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:05:16,431 INFO L87 Difference]: Start difference. First operand 11684 states and 14951 transitions. Second operand 5 states. [2020-10-13 10:06:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:06:15,232 INFO L93 Difference]: Finished difference Result 26185 states and 34742 transitions. [2020-10-13 10:06:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:06:15,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2020-10-13 10:06:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:06:15,298 INFO L225 Difference]: With dead ends: 26185 [2020-10-13 10:06:15,299 INFO L226 Difference]: Without dead ends: 14507 [2020-10-13 10:06:15,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:06:15,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14507 states. [2020-10-13 10:06:15,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14507 to 14501. [2020-10-13 10:06:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14501 states. [2020-10-13 10:06:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14501 states to 14501 states and 18281 transitions. [2020-10-13 10:06:15,668 INFO L78 Accepts]: Start accepts. Automaton has 14501 states and 18281 transitions. Word has length 141 [2020-10-13 10:06:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:06:15,668 INFO L479 AbstractCegarLoop]: Abstraction has 14501 states and 18281 transitions. [2020-10-13 10:06:15,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:06:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 14501 states and 18281 transitions. [2020-10-13 10:06:15,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 10:06:15,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:06:15,672 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:06:15,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:06:15,673 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:06:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:06:15,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1227326367, now seen corresponding path program 1 times [2020-10-13 10:06:15,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:06:15,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036085567] [2020-10-13 10:06:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:06:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:15,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:16,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:17,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:17,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 10:06:17,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:06:17,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1412 [2020-10-13 10:06:17,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:17,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:06:17,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 144 [2020-10-13 10:06:17,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:06:17,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:06:17,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:06:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:17,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:17,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:17,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:06:17,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:06:17,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:06:17,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:17,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:06:17,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:06:17,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:06:17,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:06:17,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:06:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:17,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:17,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:17,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 10:06:17,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:06:17,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-13 10:06:17,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:17,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:06:17,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:06:17,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-13 10:06:17,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:06:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:06:17,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036085567] [2020-10-13 10:06:17,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:06:17,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:06:17,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390307894] [2020-10-13 10:06:17,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:06:17,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:06:17,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:06:17,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:06:17,775 INFO L87 Difference]: Start difference. First operand 14501 states and 18281 transitions. Second operand 5 states.