/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 02:24:14,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:24:14,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:24:14,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:24:14,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:24:14,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:24:14,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:24:14,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:24:14,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:24:14,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:24:14,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:24:14,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:24:14,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:24:14,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:24:14,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:24:14,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:24:14,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:24:14,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:24:14,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:24:14,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:24:14,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:24:14,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:24:14,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:24:14,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:24:14,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 02:24:14,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 02:24:14,311 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 02:24:14,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 02:24:14,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 02:24:14,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 02:24:14,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:24:14,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:24:14,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:24:14,321 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 02:24:14,345 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:24:14,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:24:14,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:24:14,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:24:14,347 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:24:14,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:24:14,348 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:24:14,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:24:14,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:24:14,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:24:14,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:24:14,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:24:14,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:24:14,349 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:24:14,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:24:14,349 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:24:14,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:24:14,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:24:14,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:24:14,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:24:14,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:24:14,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:24:14,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:24:14,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:24:14,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:24:14,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:24:14,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:24:14,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:24:14,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:24:14,353 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=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-08-22 02:24:14,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:24:14,750 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:24:14,756 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:24:14,758 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:24:14,760 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:24:14,761 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 02:24:14,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7e550aac/55be551225c74a00bfbb416addf2ec5e/FLAG93f81fc99 [2020-08-22 02:24:15,496 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:24:15,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 02:24:15,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7e550aac/55be551225c74a00bfbb416addf2ec5e/FLAG93f81fc99 [2020-08-22 02:24:15,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7e550aac/55be551225c74a00bfbb416addf2ec5e [2020-08-22 02:24:15,830 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:24:15,832 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:24:15,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:24:15,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:24:15,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:24:15,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:24:15" (1/1) ... [2020-08-22 02:24:15,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37bbc69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:15, skipping insertion in model container [2020-08-22 02:24:15,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:24:15" (1/1) ... [2020-08-22 02:24:15,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:24:15,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:24:17,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:24:17,078 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:24:17,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:24:17,661 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:24:17,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:17 WrapperNode [2020-08-22 02:24:17,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:24:17,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:24:17,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:24:17,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:24:17,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:17" (1/1) ... [2020-08-22 02:24:17,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:17" (1/1) ... [2020-08-22 02:24:17,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:17" (1/1) ... [2020-08-22 02:24:17,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:17" (1/1) ... [2020-08-22 02:24:17,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:17" (1/1) ... [2020-08-22 02:24:17,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:17" (1/1) ... [2020-08-22 02:24:17,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:17" (1/1) ... [2020-08-22 02:24:17,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:24:17,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:24:17,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:24:17,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:24:17,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:17" (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 02:24:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:24:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:24:17,971 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 02:24:17,971 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:24:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:24:17,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 02:24:17,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 02:24:17,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 02:24:17,973 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 02:24:17,974 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 02:24:17,974 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 02:24:17,974 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 02:24:17,974 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 02:24:17,974 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 02:24:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 02:24:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 02:24:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 02:24:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 02:24:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 02:24:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:24:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:24:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:24:20,805 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:24:20,806 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 02:24:20,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:24:20 BoogieIcfgContainer [2020-08-22 02:24:20,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:24:20,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:24:20,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:24:20,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:24:20,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:24:15" (1/3) ... [2020-08-22 02:24:20,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d7a6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:24:20, skipping insertion in model container [2020-08-22 02:24:20,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:17" (2/3) ... [2020-08-22 02:24:20,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d7a6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:24:20, skipping insertion in model container [2020-08-22 02:24:20,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:24:20" (3/3) ... [2020-08-22 02:24:20,837 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 02:24:20,849 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:24:20,858 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:24:20,873 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:24:20,901 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:24:20,901 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:24:20,902 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:24:20,902 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:24:20,902 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:24:20,902 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:24:20,902 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:24:20,902 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:24:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-08-22 02:24:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-22 02:24:20,961 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:24:20,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:24:20,963 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:24:20,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:24:20,970 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-08-22 02:24:20,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:24:20,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834662307] [2020-08-22 02:24:20,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:24:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:22,769 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 02:24:22,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:24:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:22,961 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 02:24:22,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834662307] [2020-08-22 02:24:22,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:24:22,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:24:22,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212406313] [2020-08-22 02:24:22,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:24:22,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:24:22,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:24:22,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:24:22,990 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 4 states. [2020-08-22 02:24:23,600 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 02:24:29,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:24:29,132 INFO L93 Difference]: Finished difference Result 1515 states and 2659 transitions. [2020-08-22 02:24:29,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:24:29,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-22 02:24:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:24:29,177 INFO L225 Difference]: With dead ends: 1515 [2020-08-22 02:24:29,178 INFO L226 Difference]: Without dead ends: 1299 [2020-08-22 02:24:29,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:24:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2020-08-22 02:24:29,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297. [2020-08-22 02:24:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1297 states. [2020-08-22 02:24:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 2028 transitions. [2020-08-22 02:24:29,358 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 2028 transitions. Word has length 318 [2020-08-22 02:24:29,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:24:29,360 INFO L479 AbstractCegarLoop]: Abstraction has 1297 states and 2028 transitions. [2020-08-22 02:24:29,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:24:29,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 2028 transitions. [2020-08-22 02:24:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-22 02:24:29,367 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:24:29,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:24:29,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:24:29,368 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:24:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:24:29,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1367796252, now seen corresponding path program 1 times [2020-08-22 02:24:29,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:24:29,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282932426] [2020-08-22 02:24:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:24:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:30,333 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 02:24:30,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:24:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:30,526 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 02:24:30,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282932426] [2020-08-22 02:24:30,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:24:30,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:24:30,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847659277] [2020-08-22 02:24:30,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:24:30,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:24:30,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:24:30,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:24:30,533 INFO L87 Difference]: Start difference. First operand 1297 states and 2028 transitions. Second operand 4 states. [2020-08-22 02:24:31,078 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 02:24:35,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:24:35,788 INFO L93 Difference]: Finished difference Result 2671 states and 4201 transitions. [2020-08-22 02:24:35,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:24:35,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-22 02:24:35,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:24:35,809 INFO L225 Difference]: With dead ends: 2671 [2020-08-22 02:24:35,810 INFO L226 Difference]: Without dead ends: 2289 [2020-08-22 02:24:35,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:24:35,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-08-22 02:24:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287. [2020-08-22 02:24:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2287 states. [2020-08-22 02:24:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3564 transitions. [2020-08-22 02:24:35,951 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3564 transitions. Word has length 318 [2020-08-22 02:24:35,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:24:35,954 INFO L479 AbstractCegarLoop]: Abstraction has 2287 states and 3564 transitions. [2020-08-22 02:24:35,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:24:35,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3564 transitions. [2020-08-22 02:24:35,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-22 02:24:35,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:24:35,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:24:35,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:24:35,974 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:24:35,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:24:35,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times [2020-08-22 02:24:35,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:24:35,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096116087] [2020-08-22 02:24:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:24:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:37,051 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 02:24:37,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:24:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:37,419 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 02:24:37,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096116087] [2020-08-22 02:24:37,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:24:37,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:24:37,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767800647] [2020-08-22 02:24:37,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:24:37,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:24:37,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:24:37,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:24:37,425 INFO L87 Difference]: Start difference. First operand 2287 states and 3564 transitions. Second operand 4 states. [2020-08-22 02:24:38,139 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 02:24:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:24:42,487 INFO L93 Difference]: Finished difference Result 4943 states and 7762 transitions. [2020-08-22 02:24:42,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:24:42,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-22 02:24:42,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:24:42,510 INFO L225 Difference]: With dead ends: 4943 [2020-08-22 02:24:42,511 INFO L226 Difference]: Without dead ends: 4229 [2020-08-22 02:24:42,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:24:42,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2020-08-22 02:24:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4227. [2020-08-22 02:24:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4227 states. [2020-08-22 02:24:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6568 transitions. [2020-08-22 02:24:42,648 INFO L78 Accepts]: Start accepts. Automaton has 4227 states and 6568 transitions. Word has length 318 [2020-08-22 02:24:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:24:42,649 INFO L479 AbstractCegarLoop]: Abstraction has 4227 states and 6568 transitions. [2020-08-22 02:24:42,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:24:42,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4227 states and 6568 transitions. [2020-08-22 02:24:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-22 02:24:42,659 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:24:42,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:24:42,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:24:42,660 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:24:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:24:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times [2020-08-22 02:24:42,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:24:42,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488065750] [2020-08-22 02:24:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:24:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:43,672 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 02:24:43,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:24:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:43,877 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 02:24:43,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488065750] [2020-08-22 02:24:43,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:24:43,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:24:43,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654807997] [2020-08-22 02:24:43,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:24:43,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:24:43,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:24:43,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:24:43,882 INFO L87 Difference]: Start difference. First operand 4227 states and 6568 transitions. Second operand 4 states. [2020-08-22 02:24:44,555 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 02:24:49,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:24:49,336 INFO L93 Difference]: Finished difference Result 9359 states and 14670 transitions. [2020-08-22 02:24:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:24:49,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-08-22 02:24:49,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:24:49,373 INFO L225 Difference]: With dead ends: 9359 [2020-08-22 02:24:49,374 INFO L226 Difference]: Without dead ends: 8029 [2020-08-22 02:24:49,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:24:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2020-08-22 02:24:49,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 8027. [2020-08-22 02:24:49,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8027 states. [2020-08-22 02:24:49,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 12440 transitions. [2020-08-22 02:24:49,608 INFO L78 Accepts]: Start accepts. Automaton has 8027 states and 12440 transitions. Word has length 318 [2020-08-22 02:24:49,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:24:49,609 INFO L479 AbstractCegarLoop]: Abstraction has 8027 states and 12440 transitions. [2020-08-22 02:24:49,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:24:49,609 INFO L276 IsEmpty]: Start isEmpty. Operand 8027 states and 12440 transitions. [2020-08-22 02:24:49,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-22 02:24:49,630 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:24:49,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:24:49,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:24:49,631 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:24:49,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:24:49,631 INFO L82 PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times [2020-08-22 02:24:49,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:24:49,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983001831] [2020-08-22 02:24:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:24:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:50,692 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 02:24:50,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:24:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:50,904 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 02:24:50,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983001831] [2020-08-22 02:24:50,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:24:50,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:24:50,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984504561] [2020-08-22 02:24:50,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:24:50,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:24:50,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:24:50,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:24:50,908 INFO L87 Difference]: Start difference. First operand 8027 states and 12440 transitions. Second operand 5 states. [2020-08-22 02:24:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:24:58,455 INFO L93 Difference]: Finished difference Result 23754 states and 36777 transitions. [2020-08-22 02:24:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:24:58,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 318 [2020-08-22 02:24:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:24:58,518 INFO L225 Difference]: With dead ends: 23754 [2020-08-22 02:24:58,519 INFO L226 Difference]: Without dead ends: 15742 [2020-08-22 02:24:58,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:24:58,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15742 states. [2020-08-22 02:24:59,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 15740. [2020-08-22 02:24:59,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15740 states. [2020-08-22 02:24:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 24254 transitions. [2020-08-22 02:24:59,147 INFO L78 Accepts]: Start accepts. Automaton has 15740 states and 24254 transitions. Word has length 318 [2020-08-22 02:24:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:24:59,147 INFO L479 AbstractCegarLoop]: Abstraction has 15740 states and 24254 transitions. [2020-08-22 02:24:59,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:24:59,148 INFO L276 IsEmpty]: Start isEmpty. Operand 15740 states and 24254 transitions. [2020-08-22 02:24:59,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-08-22 02:24:59,182 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:24:59,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:24:59,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:24:59,186 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:24:59,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:24:59,187 INFO L82 PathProgramCache]: Analyzing trace with hash -685152901, now seen corresponding path program 1 times [2020-08-22 02:24:59,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:24:59,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397401099] [2020-08-22 02:24:59,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:24:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:59,940 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 02:24:59,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:24:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:25:00,086 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 02:25:00,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397401099] [2020-08-22 02:25:00,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:25:00,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:25:00,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102995579] [2020-08-22 02:25:00,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:25:00,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:25:00,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:25:00,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:25:00,089 INFO L87 Difference]: Start difference. First operand 15740 states and 24254 transitions. Second operand 4 states. [2020-08-22 02:25:09,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:25:09,188 INFO L93 Difference]: Finished difference Result 46481 states and 71518 transitions. [2020-08-22 02:25:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:25:09,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-08-22 02:25:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:25:09,266 INFO L225 Difference]: With dead ends: 46481 [2020-08-22 02:25:09,267 INFO L226 Difference]: Without dead ends: 30870 [2020-08-22 02:25:09,310 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 [2020-08-22 02:25:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30870 states. [2020-08-22 02:25:11,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30870 to 30868. [2020-08-22 02:25:11,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30868 states. [2020-08-22 02:25:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30868 states to 30868 states and 47285 transitions. [2020-08-22 02:25:11,412 INFO L78 Accepts]: Start accepts. Automaton has 30868 states and 47285 transitions. Word has length 320 [2020-08-22 02:25:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:25:11,413 INFO L479 AbstractCegarLoop]: Abstraction has 30868 states and 47285 transitions. [2020-08-22 02:25:11,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:25:11,413 INFO L276 IsEmpty]: Start isEmpty. Operand 30868 states and 47285 transitions. [2020-08-22 02:25:11,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-08-22 02:25:11,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:25:11,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:25:11,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:25:11,468 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:25:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:25:11,468 INFO L82 PathProgramCache]: Analyzing trace with hash -810813248, now seen corresponding path program 1 times [2020-08-22 02:25:11,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:25:11,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729758775] [2020-08-22 02:25:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY