/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:21:48,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:21:48,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:21:48,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:21:48,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:21:48,750 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:21:48,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:21:48,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:21:48,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:21:48,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:21:48,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:21:48,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:21:48,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:21:48,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:21:48,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:21:48,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:21:48,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:21:48,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:21:48,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:21:48,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:21:48,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:21:48,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:21:48,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:21:48,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:21:48,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:21:48,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:21:48,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:21:48,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:21:48,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:21:48,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:21:48,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:21:48,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:21:48,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:21:48,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:21:48,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:21:48,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:21:48,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:21:48,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:21:48,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:21:48,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:21:48,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:21:48,825 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 15:21:48,864 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:21:48,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:21:48,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:21:48,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:21:48,867 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:21:48,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:21:48,867 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:21:48,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:21:48,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:21:48,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:21:48,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:21:48,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:21:48,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:21:48,870 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:21:48,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:21:48,870 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:21:48,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:21:48,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:21:48,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:21:48,871 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:21:48,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:21:48,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:21:48,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:21:48,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:21:48,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:21:48,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:21:48,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:21:48,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:21:48,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:21:48,873 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:21:49,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:21:49,217 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:21:49,222 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:21:49,225 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:21:49,227 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:21:49,228 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label43.c [2020-10-12 15:21:49,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c546de53/c34dfcccfa4e4f4dacaa7f6807b853bf/FLAGe7633994e [2020-10-12 15:21:50,188 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:21:50,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label43.c [2020-10-12 15:21:50,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c546de53/c34dfcccfa4e4f4dacaa7f6807b853bf/FLAGe7633994e [2020-10-12 15:21:50,615 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c546de53/c34dfcccfa4e4f4dacaa7f6807b853bf [2020-10-12 15:21:50,624 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:21:50,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:21:50,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:21:50,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:21:50,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:21:50,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:21:50" (1/1) ... [2020-10-12 15:21:50,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25814f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:21:50, skipping insertion in model container [2020-10-12 15:21:50,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:21:50" (1/1) ... [2020-10-12 15:21:50,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:21:50,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:21:53,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:21:53,458 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:21:54,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:21:54,624 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:21:54,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:21:54 WrapperNode [2020-10-12 15:21:54,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:21:54,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:21:54,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:21:54,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:21:54,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:21:54" (1/1) ... [2020-10-12 15:21:54,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:21:54" (1/1) ... [2020-10-12 15:21:54,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:21:54" (1/1) ... [2020-10-12 15:21:54,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:21:54" (1/1) ... [2020-10-12 15:21:54,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:21:54" (1/1) ... [2020-10-12 15:21:55,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:21:54" (1/1) ... [2020-10-12 15:21:55,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:21:54" (1/1) ... [2020-10-12 15:21:55,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:21:55,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:21:55,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:21:55,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:21:55,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:21:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:21:55,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:21:55,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:21:55,366 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-12 15:21:55,366 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-12 15:21:55,367 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-12 15:21:55,367 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-12 15:21:55,367 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-12 15:21:55,368 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-12 15:21:55,368 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:21:55,369 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-12 15:21:55,369 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-12 15:21:55,369 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-12 15:21:55,369 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-12 15:21:55,369 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-12 15:21:55,369 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-12 15:21:55,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:21:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:21:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:21:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:21:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:21:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:22:07,447 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:22:07,448 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 15:22:07,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:22:07 BoogieIcfgContainer [2020-10-12 15:22:07,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:22:07,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:22:07,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:22:07,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:22:07,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:21:50" (1/3) ... [2020-10-12 15:22:07,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2606c8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:22:07, skipping insertion in model container [2020-10-12 15:22:07,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:21:54" (2/3) ... [2020-10-12 15:22:07,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2606c8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:22:07, skipping insertion in model container [2020-10-12 15:22:07,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:22:07" (3/3) ... [2020-10-12 15:22:07,471 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label43.c [2020-10-12 15:22:07,482 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:22:07,491 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:22:07,505 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:22:07,536 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:22:07,536 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:22:07,536 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:22:07,536 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:22:07,536 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:22:07,536 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:22:07,537 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:22:07,537 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:22:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-12 15:22:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:22:07,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:22:07,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:22:07,593 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:22:07,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:22:07,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1129276774, now seen corresponding path program 1 times [2020-10-12 15:22:07,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:22:07,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90550840] [2020-10-12 15:22:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:22:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:22:07,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:22:08,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:22:08,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:22:08,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:22:08,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-12 15:22:08,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:22:08,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:22:08,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:22:08,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:22:08,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 15:22:08,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:22:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:22:08,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:22:08,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:22:08,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:22:08,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:22:08,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-12 15:22:08,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:22:08,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:22:08,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:22:08,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:22:08,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:22:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:22:08,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90550840] [2020-10-12 15:22:08,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:22:08,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 15:22:08,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877245382] [2020-10-12 15:22:08,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 15:22:08,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:22:08,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 15:22:08,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:22:08,500 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-12 15:22:29,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:22:29,298 INFO L93 Difference]: Finished difference Result 5111 states and 9601 transitions. [2020-10-12 15:22:29,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 15:22:29,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-12 15:22:29,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:22:29,346 INFO L225 Difference]: With dead ends: 5111 [2020-10-12 15:22:29,347 INFO L226 Difference]: Without dead ends: 3270 [2020-10-12 15:22:29,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:22:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3270 states. [2020-10-12 15:22:29,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3270 to 3199. [2020-10-12 15:22:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3199 states. [2020-10-12 15:22:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 5483 transitions. [2020-10-12 15:22:29,546 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 5483 transitions. Word has length 28 [2020-10-12 15:22:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:22:29,546 INFO L479 AbstractCegarLoop]: Abstraction has 3199 states and 5483 transitions. [2020-10-12 15:22:29,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 15:22:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 5483 transitions. [2020-10-12 15:22:29,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-12 15:22:29,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:22:29,552 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2020-10-12 15:22:29,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:22:29,553 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:22:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:22:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash 72973317, now seen corresponding path program 1 times [2020-10-12 15:22:29,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:22:29,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210116394] [2020-10-12 15:22:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:22:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:22:29,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:22:29,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:22:30,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:22:30,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-12 15:22:30,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:22:30,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1220 [2020-10-12 15:22:30,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:22:30,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:22:30,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:22:30,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 15:22:30,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:22:30,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:22:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:22:30,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:22:30,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:22:30,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:22:30,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:22:30,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:22:30,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:22:30,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:22:30,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:22:30,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:22:30,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:22:30,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:22:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:22:30,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:22:31,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:22:31,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 15:22:31,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:22:31,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-12 15:22:31,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:22:31,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:22:31,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:22:31,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 15:22:31,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:22:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:22:31,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210116394] [2020-10-12 15:22:31,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:22:31,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:22:31,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795942987] [2020-10-12 15:22:31,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:22:31,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:22:31,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:22:31,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:22:31,192 INFO L87 Difference]: Start difference. First operand 3199 states and 5483 transitions. Second operand 7 states. [2020-10-12 15:23:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:23:05,139 INFO L93 Difference]: Finished difference Result 9520 states and 16478 transitions. [2020-10-12 15:23:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:23:05,140 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2020-10-12 15:23:05,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:23:05,175 INFO L225 Difference]: With dead ends: 9520 [2020-10-12 15:23:05,176 INFO L226 Difference]: Without dead ends: 6327 [2020-10-12 15:23:05,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:23:05,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6327 states. [2020-10-12 15:23:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6327 to 6215. [2020-10-12 15:23:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6215 states. [2020-10-12 15:23:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6215 states to 6215 states and 10300 transitions. [2020-10-12 15:23:05,374 INFO L78 Accepts]: Start accepts. Automaton has 6215 states and 10300 transitions. Word has length 100 [2020-10-12 15:23:05,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:23:05,375 INFO L479 AbstractCegarLoop]: Abstraction has 6215 states and 10300 transitions. [2020-10-12 15:23:05,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:23:05,375 INFO L276 IsEmpty]: Start isEmpty. Operand 6215 states and 10300 transitions. [2020-10-12 15:23:05,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-12 15:23:05,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:23:05,378 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2020-10-12 15:23:05,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:23:05,379 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:23:05,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:23:05,379 INFO L82 PathProgramCache]: Analyzing trace with hash -2030463855, now seen corresponding path program 1 times [2020-10-12 15:23:05,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:23:05,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875306756] [2020-10-12 15:23:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:23:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:23:05,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:05,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:06,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:06,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:23:06,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-12 15:23:06,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:23:06,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 787 [2020-10-12 15:23:06,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:23:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:23:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:23:06,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-12 15:23:06,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:23:06,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:23:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:23:06,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:06,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:23:06,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:23:06,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:23:06,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:23:06,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:23:06,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:23:06,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:23:06,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:23:06,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:23:06,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:23:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:23:06,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:06,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:06,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:23:06,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 15:23:06,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:23:06,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-12 15:23:06,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:23:06,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:23:06,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:23:06,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 15:23:06,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:23:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:23:06,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875306756] [2020-10-12 15:23:06,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:23:06,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 15:23:06,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041577955] [2020-10-12 15:23:06,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:23:06,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:23:06,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:23:06,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:23:06,625 INFO L87 Difference]: Start difference. First operand 6215 states and 10300 transitions. Second operand 7 states. [2020-10-12 15:23:55,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:23:55,944 INFO L93 Difference]: Finished difference Result 24136 states and 41131 transitions. [2020-10-12 15:23:55,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:23:55,948 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 103 [2020-10-12 15:23:55,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:23:56,042 INFO L225 Difference]: With dead ends: 24136 [2020-10-12 15:23:56,042 INFO L226 Difference]: Without dead ends: 17927 [2020-10-12 15:23:56,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:23:56,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17927 states. [2020-10-12 15:23:56,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17927 to 17747. [2020-10-12 15:23:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17747 states. [2020-10-12 15:23:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17747 states to 17747 states and 27457 transitions. [2020-10-12 15:23:56,598 INFO L78 Accepts]: Start accepts. Automaton has 17747 states and 27457 transitions. Word has length 103 [2020-10-12 15:23:56,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:23:56,599 INFO L479 AbstractCegarLoop]: Abstraction has 17747 states and 27457 transitions. [2020-10-12 15:23:56,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:23:56,599 INFO L276 IsEmpty]: Start isEmpty. Operand 17747 states and 27457 transitions. [2020-10-12 15:23:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-12 15:23:56,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:23:56,618 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2020-10-12 15:23:56,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:23:56,619 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:23:56,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:23:56,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1565377719, now seen corresponding path program 1 times [2020-10-12 15:23:56,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:23:56,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116078534] [2020-10-12 15:23:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:23:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:23:56,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:57,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:57,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:23:57,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-12 15:23:57,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:23:57,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 836 [2020-10-12 15:23:57,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:23:57,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:23:57,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:23:57,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-12 15:23:57,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:23:57,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:23:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:23:57,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:57,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:23:57,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:23:57,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:23:57,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:23:57,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:23:57,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:23:57,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:23:57,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:23:57,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:23:57,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:23:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:23:57,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:57,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:23:57,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-12 15:23:57,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:23:57,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-12 15:23:57,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:23:57,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:23:57,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:23:57,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-12 15:23:57,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:23:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:23:57,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116078534] [2020-10-12 15:23:57,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:23:57,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:23:57,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001901999] [2020-10-12 15:23:57,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:23:57,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:23:57,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:23:57,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:23:57,997 INFO L87 Difference]: Start difference. First operand 17747 states and 27457 transitions. Second operand 7 states. [2020-10-12 15:24:46,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:24:46,482 INFO L93 Difference]: Finished difference Result 40731 states and 64067 transitions. [2020-10-12 15:24:46,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:24:46,487 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 148 [2020-10-12 15:24:46,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:24:46,571 INFO L225 Difference]: With dead ends: 40731 [2020-10-12 15:24:46,571 INFO L226 Difference]: Without dead ends: 22990 [2020-10-12 15:24:46,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:24:46,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22990 states. [2020-10-12 15:24:47,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22990 to 20914. [2020-10-12 15:24:47,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20914 states. [2020-10-12 15:24:47,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20914 states to 20914 states and 31284 transitions. [2020-10-12 15:24:47,157 INFO L78 Accepts]: Start accepts. Automaton has 20914 states and 31284 transitions. Word has length 148 [2020-10-12 15:24:47,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:24:47,159 INFO L479 AbstractCegarLoop]: Abstraction has 20914 states and 31284 transitions. [2020-10-12 15:24:47,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:24:47,159 INFO L276 IsEmpty]: Start isEmpty. Operand 20914 states and 31284 transitions. [2020-10-12 15:24:47,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-12 15:24:47,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:24:47,163 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:24:47,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:24:47,165 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:24:47,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:24:47,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1617718863, now seen corresponding path program 1 times [2020-10-12 15:24:47,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:24:47,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887762048] [2020-10-12 15:24:47,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:24:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:24:47,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:24:47,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:24:47,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-12 15:24:47,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:24:47,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-12 15:24:47,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:24:47,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:24:47,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:24:47,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 229 [2020-10-12 15:24:47,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:24:48,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:24:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:24:48,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:24:48,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:24:48,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:24:48,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:24:48,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:24:48,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:24:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:24:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:24:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:24:48,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:24:48,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:24:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:24:48,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:24:48,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:24:48,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-12 15:24:48,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:24:48,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-12 15:24:48,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:24:48,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:24:48,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:24:48,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-12 15:24:48,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:24:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:24:48,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887762048] [2020-10-12 15:24:48,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:24:48,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:24:48,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661108407] [2020-10-12 15:24:49,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:24:49,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:24:49,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:24:49,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:24:49,001 INFO L87 Difference]: Start difference. First operand 20914 states and 31284 transitions. Second operand 7 states. [2020-10-12 15:25:51,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:25:51,728 INFO L93 Difference]: Finished difference Result 63441 states and 98696 transitions. [2020-10-12 15:25:51,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:25:51,738 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 251 [2020-10-12 15:25:51,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:25:51,910 INFO L225 Difference]: With dead ends: 63441 [2020-10-12 15:25:51,910 INFO L226 Difference]: Without dead ends: 42533 [2020-10-12 15:25:51,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:25:52,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42533 states. [2020-10-12 15:25:52,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42533 to 41852. [2020-10-12 15:25:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41852 states. [2020-10-12 15:25:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41852 states to 41852 states and 57257 transitions. [2020-10-12 15:25:52,877 INFO L78 Accepts]: Start accepts. Automaton has 41852 states and 57257 transitions. Word has length 251 [2020-10-12 15:25:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:25:52,878 INFO L479 AbstractCegarLoop]: Abstraction has 41852 states and 57257 transitions. [2020-10-12 15:25:52,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:25:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 41852 states and 57257 transitions. [2020-10-12 15:25:52,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-10-12 15:25:52,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:25:52,889 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-12 15:25:52,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:25:52,890 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:25:52,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:25:52,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1919197858, now seen corresponding path program 1 times [2020-10-12 15:25:52,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:25:52,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358882506] [2020-10-12 15:25:52,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:25:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:25:53,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:25:53,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:25:55,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:25:57,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking...