/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 10:42:24,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 10:42:24,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 10:42:24,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 10:42:24,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 10:42:24,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 10:42:24,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 10:42:24,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 10:42:24,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 10:42:24,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 10:42:24,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 10:42:24,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 10:42:24,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 10:42:24,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 10:42:24,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 10:42:24,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 10:42:24,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 10:42:24,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 10:42:24,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 10:42:24,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 10:42:24,895 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 [2020-08-18 10:42:24,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 10:42:24,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 10:42:24,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 10:42:24,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 10:42:24,919 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 10:42:24,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 10:42:24,919 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 10:42:24,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 10:42:24,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 10:42:24,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 10:42:24,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 10:42:24,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 10:42:24,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 10:42:24,921 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 10:42:24,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 10:42:24,921 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 10:42:24,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 10:42:24,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 10:42:24,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 10:42:24,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 10:42:24,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 10:42:24,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 10:42:24,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 10:42:24,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 10:42:24,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 10:42:24,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 10:42:24,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 10:42:24,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 10:42:24,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 10:42:24,924 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 -> false [2020-08-18 10:42:25,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 10:42:25,249 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 10:42:25,254 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 10:42:25,255 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 10:42:25,256 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 10:42:25,258 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 10:42:25,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdd123b28/630e8a0f900b4b13af5e018f0d4adb7c/FLAGf71286eb4 [2020-08-18 10:42:25,960 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 10:42:25,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 10:42:25,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdd123b28/630e8a0f900b4b13af5e018f0d4adb7c/FLAGf71286eb4 [2020-08-18 10:42:26,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdd123b28/630e8a0f900b4b13af5e018f0d4adb7c [2020-08-18 10:42:26,206 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 10:42:26,208 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 10:42:26,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 10:42:26,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 10:42:26,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 10:42:26,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:42:26" (1/1) ... [2020-08-18 10:42:26,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11ced97d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:26, skipping insertion in model container [2020-08-18 10:42:26,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:42:26" (1/1) ... [2020-08-18 10:42:26,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 10:42:26,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 10:42:27,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:42:27,444 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 10:42:27,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:42:27,956 INFO L208 MainTranslator]: Completed translation [2020-08-18 10:42:27,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27 WrapperNode [2020-08-18 10:42:27,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 10:42:27,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 10:42:27,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 10:42:27,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 10:42:27,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (1/1) ... [2020-08-18 10:42:27,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (1/1) ... [2020-08-18 10:42:28,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (1/1) ... [2020-08-18 10:42:28,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (1/1) ... [2020-08-18 10:42:28,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (1/1) ... [2020-08-18 10:42:28,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (1/1) ... [2020-08-18 10:42:28,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (1/1) ... [2020-08-18 10:42:28,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 10:42:28,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 10:42:28,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 10:42:28,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 10:42:28,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (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 [2020-08-18 10:42:28,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 10:42:28,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 10:42:28,298 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 10:42:28,298 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 10:42:28,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 10:42:28,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 10:42:28,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 10:42:28,299 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 10:42:28,299 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 10:42:28,299 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 10:42:28,300 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 10:42:28,300 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 10:42:28,300 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 10:42:28,300 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 10:42:28,300 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 10:42:28,301 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 10:42:28,301 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 10:42:28,301 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 10:42:28,301 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 10:42:28,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 10:42:28,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 10:42:31,016 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 10:42:31,016 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 10:42:31,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:42:31 BoogieIcfgContainer [2020-08-18 10:42:31,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 10:42:31,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 10:42:31,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 10:42:31,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 10:42:31,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:42:26" (1/3) ... [2020-08-18 10:42:31,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a9b9a55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:42:31, skipping insertion in model container [2020-08-18 10:42:31,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (2/3) ... [2020-08-18 10:42:31,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a9b9a55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:42:31, skipping insertion in model container [2020-08-18 10:42:31,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:42:31" (3/3) ... [2020-08-18 10:42:31,034 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-18 10:42:31,045 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 10:42:31,053 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 10:42:31,068 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 10:42:31,095 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 10:42:31,095 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 10:42:31,096 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 10:42:31,096 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 10:42:31,096 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 10:42:31,096 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 10:42:31,096 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 10:42:31,096 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 10:42:31,131 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-08-18 10:42:31,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-08-18 10:42:31,171 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:42:31,172 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] [2020-08-18 10:42:31,173 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:42:31,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:42:31,180 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-08-18 10:42:31,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:42:31,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044851384] [2020-08-18 10:42:31,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:42:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:42:33,234 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 10:42:33,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:42:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:42:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:42:33,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044851384] [2020-08-18 10:42:33,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:42:33,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 10:42:33,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841056432] [2020-08-18 10:42:33,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 10:42:33,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:42:33,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 10:42:33,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 10:42:33,553 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-08-18 10:42:42,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:42:42,007 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-08-18 10:42:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 10:42:42,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-08-18 10:42:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:42:42,047 INFO L225 Difference]: With dead ends: 2333 [2020-08-18 10:42:42,048 INFO L226 Difference]: Without dead ends: 1545 [2020-08-18 10:42:42,060 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 [2020-08-18 10:42:42,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-08-18 10:42:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-08-18 10:42:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-08-18 10:42:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-08-18 10:42:42,219 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-08-18 10:42:42,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:42:42,220 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-08-18 10:42:42,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 10:42:42,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-08-18 10:42:42,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-18 10:42:42,235 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:42:42,235 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] [2020-08-18 10:42:42,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 10:42:42,236 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:42:42,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:42:42,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-08-18 10:42:42,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:42:42,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386581586] [2020-08-18 10:42:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:42:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:42:43,154 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 10:42:43,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:42:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:42:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:42:43,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386581586] [2020-08-18 10:42:43,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:42:43,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 10:42:43,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411932573] [2020-08-18 10:42:43,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 10:42:43,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:42:43,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 10:42:43,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 10:42:43,491 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states. [2020-08-18 10:42:52,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:42:52,131 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-08-18 10:42:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 10:42:52,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-18 10:42:52,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:42:52,149 INFO L225 Difference]: With dead ends: 4438 [2020-08-18 10:42:52,149 INFO L226 Difference]: Without dead ends: 3024 [2020-08-18 10:42:52,154 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 [2020-08-18 10:42:52,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-08-18 10:42:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-08-18 10:42:52,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-08-18 10:42:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-08-18 10:42:52,283 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-08-18 10:42:52,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:42:52,284 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-08-18 10:42:52,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 10:42:52,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-08-18 10:42:52,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-18 10:42:52,294 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:42:52,294 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] [2020-08-18 10:42:52,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 10:42:52,295 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:42:52,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:42:52,296 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-08-18 10:42:52,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:42:52,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123487806] [2020-08-18 10:42:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:42:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:42:52,954 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 10:42:52,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:42:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:42:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:42:53,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123487806] [2020-08-18 10:42:53,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:42:53,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 10:42:53,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573361766] [2020-08-18 10:42:53,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 10:42:53,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:42:53,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 10:42:53,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 10:42:53,138 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states. [2020-08-18 10:43:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:43:00,997 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-08-18 10:43:00,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 10:43:00,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-18 10:43:00,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:43:01,024 INFO L225 Difference]: With dead ends: 8991 [2020-08-18 10:43:01,025 INFO L226 Difference]: Without dead ends: 6011 [2020-08-18 10:43:01,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 10:43:01,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-08-18 10:43:01,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-08-18 10:43:01,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-08-18 10:43:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-08-18 10:43:01,183 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-08-18 10:43:01,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:43:01,183 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-08-18 10:43:01,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 10:43:01,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-08-18 10:43:01,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-18 10:43:01,190 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:43:01,191 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] [2020-08-18 10:43:01,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 10:43:01,191 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:43:01,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:43:01,192 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-08-18 10:43:01,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:43:01,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566131346] [2020-08-18 10:43:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:43:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:01,739 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 10:43:01,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:43:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:43:01,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566131346] [2020-08-18 10:43:01,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:43:01,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 10:43:01,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103036824] [2020-08-18 10:43:01,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 10:43:01,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:43:01,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 10:43:01,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 10:43:01,855 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states. [2020-08-18 10:43:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:43:09,962 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-08-18 10:43:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 10:43:09,965 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-18 10:43:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:43:09,995 INFO L225 Difference]: With dead ends: 9010 [2020-08-18 10:43:09,995 INFO L226 Difference]: Without dead ends: 6029 [2020-08-18 10:43:10,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 10:43:10,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-08-18 10:43:10,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-08-18 10:43:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-08-18 10:43:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-08-18 10:43:10,153 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-08-18 10:43:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:43:10,154 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-08-18 10:43:10,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 10:43:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-08-18 10:43:10,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-18 10:43:10,161 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:43:10,162 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] [2020-08-18 10:43:10,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 10:43:10,163 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:43:10,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:43:10,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-08-18 10:43:10,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:43:10,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485588966] [2020-08-18 10:43:10,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:43:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:10,895 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 10:43:10,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:43:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:43:11,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485588966] [2020-08-18 10:43:11,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:43:11,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 10:43:11,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344228840] [2020-08-18 10:43:11,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 10:43:11,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:43:11,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 10:43:11,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 10:43:11,110 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states. [2020-08-18 10:43:19,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:43:19,179 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-08-18 10:43:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 10:43:19,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-18 10:43:19,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:43:19,200 INFO L225 Difference]: With dead ends: 8718 [2020-08-18 10:43:19,200 INFO L226 Difference]: Without dead ends: 5904 [2020-08-18 10:43:19,206 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 [2020-08-18 10:43:19,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-08-18 10:43:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-08-18 10:43:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-08-18 10:43:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-08-18 10:43:19,458 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-08-18 10:43:19,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:43:19,459 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-08-18 10:43:19,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 10:43:19,460 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-08-18 10:43:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-18 10:43:19,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:43:19,473 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] [2020-08-18 10:43:19,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 10:43:19,473 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:43:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:43:19,474 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-08-18 10:43:19,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:43:19,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934047388] [2020-08-18 10:43:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:43:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:20,347 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-18 10:43:20,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:43:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:43:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:43:20,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934047388] [2020-08-18 10:43:20,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:43:20,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 10:43:20,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211328697] [2020-08-18 10:43:20,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 10:43:20,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:43:20,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 10:43:20,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 10:43:20,481 INFO L87 Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 5 states.