/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --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.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:12:49,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:12:49,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:12:49,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:12:49,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:12:49,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:12:49,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:12:49,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:12:49,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:12:49,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:12:49,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:12:49,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:12:49,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:12:49,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:12:49,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:12:49,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:12:49,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:12:49,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:12:49,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:12:49,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:12:49,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:12:49,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:12:49,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:12:49,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:12:49,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:12:49,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:12:49,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:12:49,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:12:49,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:12:49,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 03:12:49,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:12:49,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:12:49,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:12:49,818 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 [2020-08-22 03:12:49,856 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:12:49,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:12:49,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:12:49,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:12:49,859 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:12:49,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:12:49,859 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:12:49,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:12:49,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:12:49,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:12:49,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:12:49,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:12:49,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:12:49,861 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:12:49,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:12:49,862 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:12:49,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:12:49,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:12:49,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:12:49,863 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:12:49,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:12:49,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:12:49,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:12:49,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:12:49,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:12:49,864 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:12:49,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:12:49,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:12:49,864 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:12:49,865 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 -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-08-22 03:12:50,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:12:50,234 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:12:50,241 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:12:50,242 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:12:50,243 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:12:50,243 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 03:12:50,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1e59697d/c48d526e5cf349e28ebdb7012397dae8/FLAGe5b106a33 [2020-08-22 03:12:50,937 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:12:50,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 03:12:50,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1e59697d/c48d526e5cf349e28ebdb7012397dae8/FLAGe5b106a33 [2020-08-22 03:12:51,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1e59697d/c48d526e5cf349e28ebdb7012397dae8 [2020-08-22 03:12:51,154 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:12:51,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:12:51,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:12:51,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:12:51,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:12:51,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:12:51" (1/1) ... [2020-08-22 03:12:51,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363f8acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:51, skipping insertion in model container [2020-08-22 03:12:51,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:12:51" (1/1) ... [2020-08-22 03:12:51,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:12:51,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:12:52,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:12:52,319 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:12:52,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:12:52,830 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:12:52,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:52 WrapperNode [2020-08-22 03:12:52,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:12:52,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:12:52,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:12:52,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:12:52,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:52" (1/1) ... [2020-08-22 03:12:52,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:52" (1/1) ... [2020-08-22 03:12:52,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:52" (1/1) ... [2020-08-22 03:12:52,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:52" (1/1) ... [2020-08-22 03:12:52,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:52" (1/1) ... [2020-08-22 03:12:52,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:52" (1/1) ... [2020-08-22 03:12:53,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:52" (1/1) ... [2020-08-22 03:12:53,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:12:53,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:12:53,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:12:53,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:12:53,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:52" (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 [2020-08-22 03:12:53,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:12:53,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:12:53,128 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 03:12:53,129 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:12:53,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:12:53,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 03:12:53,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 03:12:53,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 03:12:53,130 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 03:12:53,131 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 03:12:53,131 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 03:12:53,131 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 03:12:53,131 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 03:12:53,131 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 03:12:53,132 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 03:12:53,132 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 03:12:53,133 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 03:12:53,133 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 03:12:53,133 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 03:12:53,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:12:53,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:12:53,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:12:55,715 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:12:55,715 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 03:12:55,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:12:55 BoogieIcfgContainer [2020-08-22 03:12:55,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:12:55,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:12:55,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:12:55,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:12:55,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:12:51" (1/3) ... [2020-08-22 03:12:55,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ddce335 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:12:55, skipping insertion in model container [2020-08-22 03:12:55,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:52" (2/3) ... [2020-08-22 03:12:55,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ddce335 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:12:55, skipping insertion in model container [2020-08-22 03:12:55,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:12:55" (3/3) ... [2020-08-22 03:12:55,746 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 03:12:55,756 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:12:55,770 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:12:55,784 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:12:55,816 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:12:55,816 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:12:55,816 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:12:55,816 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:12:55,816 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:12:55,816 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:12:55,817 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:12:55,817 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:12:55,860 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-08-22 03:12:55,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-22 03:12:55,915 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:12:55,916 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] [2020-08-22 03:12:55,916 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:12:55,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:12:55,925 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-08-22 03:12:55,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:12:55,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118591105] [2020-08-22 03:12:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:12:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:12:57,623 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 03:12:57,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:12:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:12:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:12:57,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118591105] [2020-08-22 03:12:57,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:12:57,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:12:57,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566768468] [2020-08-22 03:12:57,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:12:57,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:12:57,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:12:57,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:12:57,978 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 4 states. [2020-08-22 03:12:58,725 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 03:13:03,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:13:03,950 INFO L93 Difference]: Finished difference Result 1515 states and 2659 transitions. [2020-08-22 03:13:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:13:03,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-22 03:13:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:13:03,984 INFO L225 Difference]: With dead ends: 1515 [2020-08-22 03:13:03,984 INFO L226 Difference]: Without dead ends: 1299 [2020-08-22 03:13:03,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:13:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2020-08-22 03:13:04,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297. [2020-08-22 03:13:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1297 states. [2020-08-22 03:13:04,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 2028 transitions. [2020-08-22 03:13:04,137 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 2028 transitions. Word has length 318 [2020-08-22 03:13:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:13:04,139 INFO L479 AbstractCegarLoop]: Abstraction has 1297 states and 2028 transitions. [2020-08-22 03:13:04,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:13:04,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 2028 transitions. [2020-08-22 03:13:04,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-22 03:13:04,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:04,148 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] [2020-08-22 03:13:04,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:13:04,149 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:04,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:04,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1367796252, now seen corresponding path program 1 times [2020-08-22 03:13:04,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:04,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585650458] [2020-08-22 03:13:04,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:05,041 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 03:13:05,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:13:05,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585650458] [2020-08-22 03:13:05,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:05,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:13:05,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300299232] [2020-08-22 03:13:05,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:13:05,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:05,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:13:05,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:05,379 INFO L87 Difference]: Start difference. First operand 1297 states and 2028 transitions. Second operand 4 states. [2020-08-22 03:13:06,014 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 03:13:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:13:10,494 INFO L93 Difference]: Finished difference Result 2671 states and 4201 transitions. [2020-08-22 03:13:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:13:10,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-22 03:13:10,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:13:10,508 INFO L225 Difference]: With dead ends: 2671 [2020-08-22 03:13:10,508 INFO L226 Difference]: Without dead ends: 2289 [2020-08-22 03:13:10,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:13:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-08-22 03:13:10,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287. [2020-08-22 03:13:10,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2287 states. [2020-08-22 03:13:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3564 transitions. [2020-08-22 03:13:10,591 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3564 transitions. Word has length 318 [2020-08-22 03:13:10,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:13:10,592 INFO L479 AbstractCegarLoop]: Abstraction has 2287 states and 3564 transitions. [2020-08-22 03:13:10,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:13:10,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3564 transitions. [2020-08-22 03:13:10,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-22 03:13:10,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:10,601 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] [2020-08-22 03:13:10,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:13:10,601 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:10,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:10,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times [2020-08-22 03:13:10,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:10,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246475581] [2020-08-22 03:13:10,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:11,550 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 03:13:11,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:13:11,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246475581] [2020-08-22 03:13:11,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:11,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:13:11,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033180311] [2020-08-22 03:13:11,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:13:11,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:11,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:13:11,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:11,709 INFO L87 Difference]: Start difference. First operand 2287 states and 3564 transitions. Second operand 4 states. [2020-08-22 03:13:12,117 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 03:13:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:13:16,036 INFO L93 Difference]: Finished difference Result 4943 states and 7762 transitions. [2020-08-22 03:13:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:13:16,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-22 03:13:16,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:13:16,057 INFO L225 Difference]: With dead ends: 4943 [2020-08-22 03:13:16,057 INFO L226 Difference]: Without dead ends: 4229 [2020-08-22 03:13:16,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:13:16,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2020-08-22 03:13:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4227. [2020-08-22 03:13:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4227 states. [2020-08-22 03:13:16,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6568 transitions. [2020-08-22 03:13:16,187 INFO L78 Accepts]: Start accepts. Automaton has 4227 states and 6568 transitions. Word has length 318 [2020-08-22 03:13:16,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:13:16,187 INFO L479 AbstractCegarLoop]: Abstraction has 4227 states and 6568 transitions. [2020-08-22 03:13:16,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:13:16,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4227 states and 6568 transitions. [2020-08-22 03:13:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-22 03:13:16,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:16,197 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] [2020-08-22 03:13:16,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:13:16,198 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:16,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:16,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times [2020-08-22 03:13:16,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:16,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588386598] [2020-08-22 03:13:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:16,928 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 03:13:16,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:13:17,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588386598] [2020-08-22 03:13:17,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:17,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:13:17,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275398924] [2020-08-22 03:13:17,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:13:17,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:17,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:13:17,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:17,118 INFO L87 Difference]: Start difference. First operand 4227 states and 6568 transitions. Second operand 4 states. [2020-08-22 03:13:17,554 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 03:13:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:13:21,459 INFO L93 Difference]: Finished difference Result 9359 states and 14670 transitions. [2020-08-22 03:13:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:13:21,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-22 03:13:21,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:13:21,498 INFO L225 Difference]: With dead ends: 9359 [2020-08-22 03:13:21,499 INFO L226 Difference]: Without dead ends: 8029 [2020-08-22 03:13:21,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:13:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2020-08-22 03:13:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 8027. [2020-08-22 03:13:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8027 states. [2020-08-22 03:13:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 12440 transitions. [2020-08-22 03:13:21,767 INFO L78 Accepts]: Start accepts. Automaton has 8027 states and 12440 transitions. Word has length 318 [2020-08-22 03:13:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:13:21,768 INFO L479 AbstractCegarLoop]: Abstraction has 8027 states and 12440 transitions. [2020-08-22 03:13:21,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:13:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand 8027 states and 12440 transitions. [2020-08-22 03:13:21,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-22 03:13:21,785 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:21,786 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] [2020-08-22 03:13:21,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:13:21,786 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:21,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:21,787 INFO L82 PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times [2020-08-22 03:13:21,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:21,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066521340] [2020-08-22 03:13:21,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:22,788 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 03:13:22,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:13:22,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066521340] [2020-08-22 03:13:22,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:22,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:13:22,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006974294] [2020-08-22 03:13:22,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:13:22,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:22,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:13:22,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:13:22,931 INFO L87 Difference]: Start difference. First operand 8027 states and 12440 transitions. Second operand 5 states. [2020-08-22 03:13:29,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:13:29,688 INFO L93 Difference]: Finished difference Result 23754 states and 36777 transitions. [2020-08-22 03:13:29,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:13:29,689 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 318 [2020-08-22 03:13:29,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:13:29,748 INFO L225 Difference]: With dead ends: 23754 [2020-08-22 03:13:29,748 INFO L226 Difference]: Without dead ends: 15742 [2020-08-22 03:13:29,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:13:29,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15742 states. [2020-08-22 03:13:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 15740. [2020-08-22 03:13:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15740 states. [2020-08-22 03:13:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 24254 transitions. [2020-08-22 03:13:30,194 INFO L78 Accepts]: Start accepts. Automaton has 15740 states and 24254 transitions. Word has length 318 [2020-08-22 03:13:30,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:13:30,194 INFO L479 AbstractCegarLoop]: Abstraction has 15740 states and 24254 transitions. [2020-08-22 03:13:30,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:13:30,194 INFO L276 IsEmpty]: Start isEmpty. Operand 15740 states and 24254 transitions. [2020-08-22 03:13:30,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-08-22 03:13:30,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:30,227 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] [2020-08-22 03:13:30,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:13:30,230 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:30,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:30,231 INFO L82 PathProgramCache]: Analyzing trace with hash -685152901, now seen corresponding path program 1 times [2020-08-22 03:13:30,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:30,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243850433] [2020-08-22 03:13:30,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:30,929 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 03:13:30,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:13:31,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243850433] [2020-08-22 03:13:31,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:31,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:13:31,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431765176] [2020-08-22 03:13:31,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:13:31,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:31,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:13:31,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:31,072 INFO L87 Difference]: Start difference. First operand 15740 states and 24254 transitions. Second operand 4 states. [2020-08-22 03:13:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:13:39,191 INFO L93 Difference]: Finished difference Result 46481 states and 71518 transitions. [2020-08-22 03:13:39,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 03:13:39,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-08-22 03:13:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:13:39,257 INFO L225 Difference]: With dead ends: 46481 [2020-08-22 03:13:39,257 INFO L226 Difference]: Without dead ends: 30870 [2020-08-22 03:13:39,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:39,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30870 states. [2020-08-22 03:13:40,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30870 to 30868. [2020-08-22 03:13:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30868 states. [2020-08-22 03:13:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30868 states to 30868 states and 47285 transitions. [2020-08-22 03:13:41,015 INFO L78 Accepts]: Start accepts. Automaton has 30868 states and 47285 transitions. Word has length 320 [2020-08-22 03:13:41,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:13:41,015 INFO L479 AbstractCegarLoop]: Abstraction has 30868 states and 47285 transitions. [2020-08-22 03:13:41,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:13:41,015 INFO L276 IsEmpty]: Start isEmpty. Operand 30868 states and 47285 transitions. [2020-08-22 03:13:41,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-08-22 03:13:41,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:41,068 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] [2020-08-22 03:13:41,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:13:41,068 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:41,069 INFO L82 PathProgramCache]: Analyzing trace with hash -810813248, now seen corresponding path program 1 times [2020-08-22 03:13:41,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:41,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841286611] [2020-08-22 03:13:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:41,552 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 03:13:41,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:13:41,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841286611] [2020-08-22 03:13:41,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:41,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:13:41,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790742475] [2020-08-22 03:13:41,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:13:41,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:41,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:13:41,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:41,638 INFO L87 Difference]: Start difference. First operand 30868 states and 47285 transitions. Second operand 4 states.