/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=0.5 --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.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 06:27:21,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 06:27:21,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 06:27:21,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 06:27:21,781 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 06:27:21,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 06:27:21,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 06:27:21,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 06:27:21,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 06:27:21,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 06:27:21,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 06:27:21,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 06:27:21,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 06:27:21,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 06:27:21,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 06:27:21,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 06:27:21,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 06:27:21,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 06:27:21,816 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 06:27:21,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 06:27:21,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 06:27:21,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 06:27:21,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 06:27:21,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 06:27:21,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 06:27:21,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 06:27:21,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 06:27:21,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 06:27:21,858 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 06:27:21,878 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 06:27:21,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 06:27:21,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 06:27:21,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 06:27:21,880 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 06:27:21,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 06:27:21,881 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 06:27:21,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 06:27:21,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 06:27:21,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 06:27:21,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 06:27:21,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 06:27:21,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 06:27:21,882 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 06:27:21,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 06:27:21,882 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 06:27:21,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 06:27:21,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 06:27:21,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 06:27:21,883 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 06:27:21,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 06:27:21,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:27:21,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 06:27:21,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 06:27:21,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 06:27:21,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 06:27:21,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 06:27:21,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 06:27:21,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 06:27:21,885 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=0.5;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=0.5;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=0.5;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=0.5;log-additional-information=true; [2020-08-22 06:27:22,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 06:27:22,203 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 06:27:22,207 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 06:27:22,209 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 06:27:22,210 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 06:27:22,211 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-22 06:27:22,288 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b84aed264/becbd2728b6b4fd38daa98e1d69e0fa5/FLAG29c874edb [2020-08-22 06:27:22,949 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 06:27:22,950 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-22 06:27:22,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b84aed264/becbd2728b6b4fd38daa98e1d69e0fa5/FLAG29c874edb [2020-08-22 06:27:23,138 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b84aed264/becbd2728b6b4fd38daa98e1d69e0fa5 [2020-08-22 06:27:23,149 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 06:27:23,151 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 06:27:23,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 06:27:23,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 06:27:23,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 06:27:23,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:27:23" (1/1) ... [2020-08-22 06:27:23,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@224796be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:27:23, skipping insertion in model container [2020-08-22 06:27:23,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:27:23" (1/1) ... [2020-08-22 06:27:23,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 06:27:23,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 06:27:24,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:27:24,329 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 06:27:24,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:27:24,908 INFO L208 MainTranslator]: Completed translation [2020-08-22 06:27:24,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:27:24 WrapperNode [2020-08-22 06:27:24,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 06:27:24,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 06:27:24,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 06:27:24,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 06:27:24,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:27:24" (1/1) ... [2020-08-22 06:27:24,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:27:24" (1/1) ... [2020-08-22 06:27:24,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:27:24" (1/1) ... [2020-08-22 06:27:24,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:27:24" (1/1) ... [2020-08-22 06:27:25,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:27:24" (1/1) ... [2020-08-22 06:27:25,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:27:24" (1/1) ... [2020-08-22 06:27:25,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:27:24" (1/1) ... [2020-08-22 06:27:25,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 06:27:25,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 06:27:25,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 06:27:25,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 06:27:25,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:27:24" (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 06:27:25,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 06:27:25,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 06:27:25,236 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 06:27:25,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 06:27:25,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 06:27:25,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 06:27:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 06:27:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 06:27:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 06:27:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 06:27:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 06:27:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 06:27:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 06:27:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 06:27:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 06:27:25,244 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 06:27:25,244 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 06:27:25,244 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 06:27:25,244 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 06:27:25,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 06:27:25,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 06:27:27,990 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 06:27:27,990 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 06:27:28,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:27:28 BoogieIcfgContainer [2020-08-22 06:27:28,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 06:27:28,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 06:27:28,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 06:27:28,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 06:27:28,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:27:23" (1/3) ... [2020-08-22 06:27:28,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f06733e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:27:28, skipping insertion in model container [2020-08-22 06:27:28,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:27:24" (2/3) ... [2020-08-22 06:27:28,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f06733e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:27:28, skipping insertion in model container [2020-08-22 06:27:28,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:27:28" (3/3) ... [2020-08-22 06:27:28,009 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-22 06:27:28,020 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 06:27:28,030 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 06:27:28,045 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 06:27:28,073 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 06:27:28,074 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 06:27:28,074 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 06:27:28,074 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 06:27:28,074 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 06:27:28,074 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 06:27:28,074 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 06:27:28,075 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 06:27:28,112 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-08-22 06:27:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-08-22 06:27:28,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:27:28,144 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] [2020-08-22 06:27:28,145 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:27:28,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:27:28,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-08-22 06:27:28,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:27:28,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366451446] [2020-08-22 06:27:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:27:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:27:30,275 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 06:27:30,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:27:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:27:30,480 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 06:27:30,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366451446] [2020-08-22 06:27:30,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:27:30,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 06:27:30,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284695908] [2020-08-22 06:27:30,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:27:30,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:27:30,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:27:30,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:27:30,508 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-08-22 06:27:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:27:38,482 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-08-22 06:27:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 06:27:38,485 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-08-22 06:27:38,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:27:38,516 INFO L225 Difference]: With dead ends: 2333 [2020-08-22 06:27:38,517 INFO L226 Difference]: Without dead ends: 1545 [2020-08-22 06:27:38,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:27:38,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-08-22 06:27:38,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-08-22 06:27:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-08-22 06:27:38,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-08-22 06:27:38,692 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-08-22 06:27:38,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:27:38,693 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-08-22 06:27:38,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:27:38,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-08-22 06:27:38,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 06:27:38,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:27:38,705 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] [2020-08-22 06:27:38,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 06:27:38,706 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:27:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:27:38,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-08-22 06:27:38,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:27:38,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073577473] [2020-08-22 06:27:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:27:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:27:39,619 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 06:27:39,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:27:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:27:39,954 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 06:27:39,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073577473] [2020-08-22 06:27:39,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:27:39,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 06:27:39,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886103534] [2020-08-22 06:27:39,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:27:39,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:27:39,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:27:39,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:27:39,963 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states. [2020-08-22 06:27:48,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:27:48,612 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-08-22 06:27:48,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 06:27:48,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 06:27:48,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:27:48,630 INFO L225 Difference]: With dead ends: 4438 [2020-08-22 06:27:48,630 INFO L226 Difference]: Without dead ends: 3024 [2020-08-22 06:27:48,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:27:48,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-08-22 06:27:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-08-22 06:27:48,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-08-22 06:27:48,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-08-22 06:27:48,812 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-08-22 06:27:48,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:27:48,813 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-08-22 06:27:48,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 06:27:48,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-08-22 06:27:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 06:27:48,823 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:27:48,824 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] [2020-08-22 06:27:48,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 06:27:48,824 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:27:48,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:27:48,825 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-08-22 06:27:48,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:27:48,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261594371] [2020-08-22 06:27:48,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:27:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:27:49,387 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 06:27:49,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:27:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:27:49,514 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 06:27:49,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261594371] [2020-08-22 06:27:49,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:27:49,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 06:27:49,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974057980] [2020-08-22 06:27:49,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:27:49,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:27:49,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:27:49,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:27:49,527 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states. [2020-08-22 06:27:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:27:57,921 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-08-22 06:27:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 06:27:57,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 06:27:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:27:57,946 INFO L225 Difference]: With dead ends: 8991 [2020-08-22 06:27:57,946 INFO L226 Difference]: Without dead ends: 6011 [2020-08-22 06:27:57,952 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 06:27:57,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-08-22 06:27:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-08-22 06:27:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-08-22 06:27:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-08-22 06:27:58,100 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-08-22 06:27:58,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:27:58,100 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-08-22 06:27:58,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 06:27:58,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-08-22 06:27:58,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-22 06:27:58,108 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:27:58,108 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] [2020-08-22 06:27:58,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 06:27:58,109 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:27:58,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:27:58,109 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-08-22 06:27:58,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:27:58,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098789967] [2020-08-22 06:27:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:27:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:27:58,633 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 06:27:58,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:27:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:27:58,729 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 06:27:58,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098789967] [2020-08-22 06:27:58,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:27:58,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 06:27:58,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93140946] [2020-08-22 06:27:58,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:27:58,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:27:58,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:27:58,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:27:58,732 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states. [2020-08-22 06:28:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:28:06,814 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-08-22 06:28:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 06:28:06,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-22 06:28:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:28:06,840 INFO L225 Difference]: With dead ends: 9010 [2020-08-22 06:28:06,840 INFO L226 Difference]: Without dead ends: 6029 [2020-08-22 06:28:06,847 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 06:28:06,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-08-22 06:28:07,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-08-22 06:28:07,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-08-22 06:28:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-08-22 06:28:07,009 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-08-22 06:28:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:28:07,010 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-08-22 06:28:07,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 06:28:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-08-22 06:28:07,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-22 06:28:07,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:28:07,018 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] [2020-08-22 06:28:07,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 06:28:07,019 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:28:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:28:07,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-08-22 06:28:07,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:28:07,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841016866] [2020-08-22 06:28:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:28:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:28:07,760 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 06:28:07,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:28:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:28:07,918 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 06:28:07,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841016866] [2020-08-22 06:28:07,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:28:07,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 06:28:07,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285047737] [2020-08-22 06:28:07,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:28:07,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:28:07,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:28:07,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:28:07,921 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states. [2020-08-22 06:28:15,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:28:15,663 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-08-22 06:28:15,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 06:28:15,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-22 06:28:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:28:15,685 INFO L225 Difference]: With dead ends: 8718 [2020-08-22 06:28:15,685 INFO L226 Difference]: Without dead ends: 5904 [2020-08-22 06:28:15,691 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 06:28:15,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-08-22 06:28:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-08-22 06:28:15,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-08-22 06:28:15,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-08-22 06:28:15,984 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-08-22 06:28:15,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:28:15,986 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-08-22 06:28:15,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 06:28:15,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-08-22 06:28:16,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-22 06:28:16,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:28:16,003 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] [2020-08-22 06:28:16,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 06:28:16,003 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:28:16,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:28:16,004 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-08-22 06:28:16,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:28:16,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160684110] [2020-08-22 06:28:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:28:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:28:16,884 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 06:28:16,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:28:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:28:17,026 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 06:28:17,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160684110] [2020-08-22 06:28:17,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:28:17,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 06:28:17,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560094304] [2020-08-22 06:28:17,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:28:17,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:28:17,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:28:17,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:28:17,029 INFO L87 Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 5 states. [2020-08-22 06:28:22,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:28:22,919 INFO L93 Difference]: Finished difference Result 13189 states and 20201 transitions. [2020-08-22 06:28:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 06:28:22,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2020-08-22 06:28:22,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:28:22,948 INFO L225 Difference]: With dead ends: 13189 [2020-08-22 06:28:22,948 INFO L226 Difference]: Without dead ends: 6775 [2020-08-22 06:28:22,959 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 06:28:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6775 states. [2020-08-22 06:28:23,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6775 to 6773. [2020-08-22 06:28:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6773 states. [2020-08-22 06:28:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6773 states to 6773 states and 10350 transitions. [2020-08-22 06:28:23,229 INFO L78 Accepts]: Start accepts. Automaton has 6773 states and 10350 transitions. Word has length 328 [2020-08-22 06:28:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:28:23,230 INFO L479 AbstractCegarLoop]: Abstraction has 6773 states and 10350 transitions. [2020-08-22 06:28:23,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:28:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 6773 states and 10350 transitions. [2020-08-22 06:28:23,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-22 06:28:23,245 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:28:23,246 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] [2020-08-22 06:28:23,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 06:28:23,246 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:28:23,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:28:23,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1619567406, now seen corresponding path program 1 times [2020-08-22 06:28:23,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:28:23,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043473940] [2020-08-22 06:28:23,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:28:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:28:23,763 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 06:28:23,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:28:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:28:23,913 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 06:28:23,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043473940] [2020-08-22 06:28:23,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:28:23,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 06:28:23,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431279503] [2020-08-22 06:28:23,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:28:23,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:28:23,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:28:23,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:28:23,916 INFO L87 Difference]: Start difference. First operand 6773 states and 10350 transitions. Second operand 4 states.