/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 --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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:35:16,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:35:16,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:35:16,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:35:16,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:35:16,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:35:16,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:35:16,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:35:16,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:35:16,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:35:16,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:35:16,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:35:16,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:35:16,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:35:16,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:35:16,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:35:16,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:35:16,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:35:16,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:35:16,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:35:16,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:35:16,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:35:16,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:35:16,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:35:16,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:35:16,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:35:16,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:35:16,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:35:16,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:35:16,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:35:16,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:35:16,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:35:16,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:35:16,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:35:16,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:35:16,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:35:16,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:35:16,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:35:16,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:35:16,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:35:16,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:35:16,818 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 [2020-09-21 11:35:16,863 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:35:16,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:35:16,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:35:16,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:35:16,866 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:35:16,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:35:16,867 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:35:16,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:35:16,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:35:16,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:35:16,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:35:16,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:35:16,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:35:16,870 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:35:16,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:35:16,870 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:35:16,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:35:16,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:35:16,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:35:16,871 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:35:16,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:35:16,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:35:16,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:35:16,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:35:16,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:35:16,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:35:16,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:35:16,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:35:16,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:35:16,873 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.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;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:35:17,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:35:17,403 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:35:17,408 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:35:17,411 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:35:17,411 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:35:17,413 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-21 11:35:17,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/411cb3def/33e0b9fdef074756b2ab3adf47c36fb5/FLAGf2dc7b05f [2020-09-21 11:35:18,273 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:35:18,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-21 11:35:18,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/411cb3def/33e0b9fdef074756b2ab3adf47c36fb5/FLAGf2dc7b05f [2020-09-21 11:35:18,379 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/411cb3def/33e0b9fdef074756b2ab3adf47c36fb5 [2020-09-21 11:35:18,395 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:35:18,402 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:35:18,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:35:18,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:35:18,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:35:18,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:35:18" (1/1) ... [2020-09-21 11:35:18,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f6f65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:18, skipping insertion in model container [2020-09-21 11:35:18,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:35:18" (1/1) ... [2020-09-21 11:35:18,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:35:18,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:35:20,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:35:20,447 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:35:21,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:35:21,520 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:35:21,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:21 WrapperNode [2020-09-21 11:35:21,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:35:21,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:35:21,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:35:21,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:35:21,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:21" (1/1) ... [2020-09-21 11:35:21,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:21" (1/1) ... [2020-09-21 11:35:21,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:21" (1/1) ... [2020-09-21 11:35:21,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:21" (1/1) ... [2020-09-21 11:35:21,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:21" (1/1) ... [2020-09-21 11:35:21,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:21" (1/1) ... [2020-09-21 11:35:21,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:21" (1/1) ... [2020-09-21 11:35:21,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:35:21,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:35:21,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:35:21,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:35:21,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:21" (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 [2020-09-21 11:35:21,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:35:21,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:35:21,887 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:35:21,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:35:21,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:35:21,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 11:35:21,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 11:35:21,888 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 11:35:21,888 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:35:21,889 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:35:21,889 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 11:35:21,889 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 11:35:21,890 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 11:35:21,890 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 11:35:21,890 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 11:35:21,891 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 11:35:21,891 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-21 11:35:21,891 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 11:35:21,892 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 11:35:21,892 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:35:21,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:35:21,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:35:26,351 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:35:26,352 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:35:26,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:35:26 BoogieIcfgContainer [2020-09-21 11:35:26,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:35:26,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:35:26,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:35:26,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:35:26,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:35:18" (1/3) ... [2020-09-21 11:35:26,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6ce8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:35:26, skipping insertion in model container [2020-09-21 11:35:26,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:35:21" (2/3) ... [2020-09-21 11:35:26,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6ce8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:35:26, skipping insertion in model container [2020-09-21 11:35:26,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:35:26" (3/3) ... [2020-09-21 11:35:26,382 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-21 11:35:26,394 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:35:26,410 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:35:26,436 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:35:26,481 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:35:26,482 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:35:26,482 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:35:26,482 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:35:26,482 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:35:26,482 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:35:26,483 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:35:26,483 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:35:26,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states. [2020-09-21 11:35:26,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-09-21 11:35:26,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:35:26,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:35:26,596 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:35:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:35:26,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1961833088, now seen corresponding path program 1 times [2020-09-21 11:35:26,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:35:26,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382595284] [2020-09-21 11:35:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:35:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:28,968 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:28,969 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:28,969 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:28,969 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:28,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 494 [2020-09-21 11:35:28,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:28,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-21 11:35:28,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:28,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:35:28,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:35:28,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 191 [2020-09-21 11:35:28,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:35:31,466 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 403 [2020-09-21 11:35:31,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:35:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:31,485 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:31,486 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:31,486 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:31,486 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:31,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:35:31,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:31,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:35:31,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:31,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:35:31,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:35:31,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:35:31,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:35:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:35:31,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382595284] [2020-09-21 11:35:31,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:35:31,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:35:31,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502861489] [2020-09-21 11:35:31,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:35:31,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:35:31,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:35:31,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:35:31,997 INFO L87 Difference]: Start difference. First operand 1431 states. Second operand 5 states. [2020-09-21 11:35:49,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:35:49,584 INFO L93 Difference]: Finished difference Result 4236 states and 7632 transitions. [2020-09-21 11:35:49,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:35:49,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 487 [2020-09-21 11:35:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:35:49,632 INFO L225 Difference]: With dead ends: 4236 [2020-09-21 11:35:49,633 INFO L226 Difference]: Without dead ends: 2814 [2020-09-21 11:35:49,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:35:49,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2020-09-21 11:35:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2812. [2020-09-21 11:35:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2812 states. [2020-09-21 11:35:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 4639 transitions. [2020-09-21 11:35:49,885 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 4639 transitions. Word has length 487 [2020-09-21 11:35:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:35:49,886 INFO L479 AbstractCegarLoop]: Abstraction has 2812 states and 4639 transitions. [2020-09-21 11:35:49,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:35:49,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 4639 transitions. [2020-09-21 11:35:49,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-09-21 11:35:49,901 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:35:49,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:35:49,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:35:49,903 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:35:49,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:35:49,903 INFO L82 PathProgramCache]: Analyzing trace with hash 39211808, now seen corresponding path program 1 times [2020-09-21 11:35:49,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:35:49,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878308162] [2020-09-21 11:35:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:35:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:50,260 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:50,260 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:50,261 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:50,261 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:50,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 496 [2020-09-21 11:35:50,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:50,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:35:50,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:50,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:35:50,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:35:50,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 205 [2020-09-21 11:35:50,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-21 11:35:51,666 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-09-21 11:35:51,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:35:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:51,679 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:51,680 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:51,680 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:51,680 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:51,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:35:51,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:51,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:35:51,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:51,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:35:51,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:35:51,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:35:51,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:35:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:35:52,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878308162] [2020-09-21 11:35:52,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:35:52,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:35:52,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949376942] [2020-09-21 11:35:52,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:35:52,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:35:52,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:35:52,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:35:52,009 INFO L87 Difference]: Start difference. First operand 2812 states and 4639 transitions. Second operand 4 states. [2020-09-21 11:36:12,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:36:12,010 INFO L93 Difference]: Finished difference Result 8158 states and 13422 transitions. [2020-09-21 11:36:12,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:36:12,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-09-21 11:36:12,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:36:12,044 INFO L225 Difference]: With dead ends: 8158 [2020-09-21 11:36:12,044 INFO L226 Difference]: Without dead ends: 5560 [2020-09-21 11:36:12,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:36:12,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2020-09-21 11:36:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 5558. [2020-09-21 11:36:12,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5558 states. [2020-09-21 11:36:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 9141 transitions. [2020-09-21 11:36:12,276 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 9141 transitions. Word has length 489 [2020-09-21 11:36:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:36:12,280 INFO L479 AbstractCegarLoop]: Abstraction has 5558 states and 9141 transitions. [2020-09-21 11:36:12,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:36:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 9141 transitions. [2020-09-21 11:36:12,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-09-21 11:36:12,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:36:12,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:36:12,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:36:12,314 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:36:12,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:36:12,315 INFO L82 PathProgramCache]: Analyzing trace with hash -960654715, now seen corresponding path program 1 times [2020-09-21 11:36:12,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:36:12,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009964705] [2020-09-21 11:36:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:36:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:36:12,551 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:36:12,551 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:36:12,552 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:36:12,552 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:36:12,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 497 [2020-09-21 11:36:12,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:36:12,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:36:12,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:36:12,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:36:12,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:36:12,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:36:12,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:36:13,662 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-09-21 11:36:13,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:36:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:36:13,676 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:36:13,677 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:36:13,677 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:36:13,677 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:36:13,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:36:13,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:36:13,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:36:13,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:36:13,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:36:13,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:36:13,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:36:13,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:36:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:36:13,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009964705] [2020-09-21 11:36:13,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:36:13,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:36:13,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100990773] [2020-09-21 11:36:13,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:36:13,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:36:13,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:36:13,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:36:13,865 INFO L87 Difference]: Start difference. First operand 5558 states and 9141 transitions. Second operand 4 states.