/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:29:48,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:29:48,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:29:48,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:29:48,732 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:29:48,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:29:48,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:29:48,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:29:48,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:29:48,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:29:48,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:29:48,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:29:48,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:29:48,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:29:48,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:29:48,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:29:48,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:29:48,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:29:48,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:29:48,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:29:48,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:29:48,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:29:48,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:29:48,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:29:48,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:29:48,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 02:29:48,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 02:29:48,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 02:29:48,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 02:29:48,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 02:29:48,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 02:29:48,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 02:29:48,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 02:29:48,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:29:48,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:29:48,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:29:48,781 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 02:29:48,795 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:29:48,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:29:48,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:29:48,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:29:48,797 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:29:48,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:29:48,797 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:29:48,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:29:48,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:29:48,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:29:48,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:29:48,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:29:48,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:29:48,798 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:29:48,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:29:48,799 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:29:48,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:29:48,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:29:48,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:29:48,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:29:48,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:29:48,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:29:48,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:29:48,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:29:48,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:29:48,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:29:48,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:48,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:29:48,801 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:29:48,802 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 02:29:49,055 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:29:49,071 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:29:49,075 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:29:49,076 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:29:49,078 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:29:49,080 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 02:29:49,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c559f0875/516dfc7195d248e6baefae641fdf19af/FLAGd1c25ae0d [2020-07-21 02:29:49,870 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:29:49,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 02:29:49,905 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c559f0875/516dfc7195d248e6baefae641fdf19af/FLAGd1c25ae0d [2020-07-21 02:29:49,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c559f0875/516dfc7195d248e6baefae641fdf19af [2020-07-21 02:29:50,009 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:29:50,012 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:29:50,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:29:50,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:29:50,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:29:50,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:29:50" (1/1) ... [2020-07-21 02:29:50,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@139dbffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:29:50, skipping insertion in model container [2020-07-21 02:29:50,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:29:50" (1/1) ... [2020-07-21 02:29:50,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:29:50,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:29:51,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:29:51,679 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:29:52,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:29:52,776 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:29:52,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:29:52 WrapperNode [2020-07-21 02:29:52,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:29:52,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:29:52,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:29:52,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:29:52,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:29:52" (1/1) ... [2020-07-21 02:29:52,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:29:52" (1/1) ... [2020-07-21 02:29:52,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:29:52" (1/1) ... [2020-07-21 02:29:52,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:29:52" (1/1) ... [2020-07-21 02:29:52,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:29:52" (1/1) ... [2020-07-21 02:29:52,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:29:52" (1/1) ... [2020-07-21 02:29:53,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:29:52" (1/1) ... [2020-07-21 02:29:53,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:29:53,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:29:53,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:29:53,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:29:53,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:29:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-21 02:29:53,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:29:53,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:29:53,094 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:29:53,094 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:29:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:29:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 02:29:53,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 02:29:53,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 02:29:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 02:29:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:29:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:29:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 02:29:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 02:29:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 02:29:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 02:29:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 02:29:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 02:29:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 02:29:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 02:29:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 02:29:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:29:53,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:29:53,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:29:56,785 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:29:56,785 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 02:29:56,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:29:56 BoogieIcfgContainer [2020-07-21 02:29:56,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:29:56,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:29:56,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:29:56,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:29:56,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:29:50" (1/3) ... [2020-07-21 02:29:56,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e14a3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:29:56, skipping insertion in model container [2020-07-21 02:29:56,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:29:52" (2/3) ... [2020-07-21 02:29:56,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e14a3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:29:56, skipping insertion in model container [2020-07-21 02:29:56,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:29:56" (3/3) ... [2020-07-21 02:29:56,807 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 02:29:56,817 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:29:56,826 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 02:29:56,840 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 02:29:56,868 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:29:56,868 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:29:56,868 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:29:56,869 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:29:56,869 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:29:56,869 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:29:56,869 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:29:56,869 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:29:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states. [2020-07-21 02:29:56,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 02:29:56,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:29:56,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:29:56,948 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:29:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:29:56,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2033441387, now seen corresponding path program 1 times [2020-07-21 02:29:56,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:29:56,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182250146] [2020-07-21 02:29:56,964 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:57,544 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:29:57,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:29:57,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:29:57,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:29:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:29:57,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:29:57,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182250146] [2020-07-21 02:29:57,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:29:57,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:29:57,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353697066] [2020-07-21 02:29:57,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:29:57,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:29:58,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:29:58,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:29:58,005 INFO L87 Difference]: Start difference. First operand 1449 states. Second operand 4 states. [2020-07-21 02:29:58,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:29:58,437 INFO L93 Difference]: Finished difference Result 4291 states and 7727 transitions. [2020-07-21 02:29:58,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:29:58,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-21 02:29:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:29:58,476 INFO L225 Difference]: With dead ends: 4291 [2020-07-21 02:29:58,477 INFO L226 Difference]: Without dead ends: 2849 [2020-07-21 02:29:58,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:29:58,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2020-07-21 02:29:58,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2847. [2020-07-21 02:29:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2847 states. [2020-07-21 02:29:58,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 4683 transitions. [2020-07-21 02:29:58,671 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 4683 transitions. Word has length 496 [2020-07-21 02:29:58,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:29:58,708 INFO L479 AbstractCegarLoop]: Abstraction has 2847 states and 4683 transitions. [2020-07-21 02:29:58,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:29:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 4683 transitions. [2020-07-21 02:29:58,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 02:29:58,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:29:58,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:29:58,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:58,938 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:29:58,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:29:58,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1861665862, now seen corresponding path program 1 times [2020-07-21 02:29:58,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:29:58,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631252856] [2020-07-21 02:29:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:59,363 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:29:59,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:29:59,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 2119 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:29:59,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:29:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:29:59,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:29:59,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631252856] [2020-07-21 02:29:59,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:29:59,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:29:59,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508624707] [2020-07-21 02:29:59,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:29:59,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:29:59,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:29:59,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:29:59,715 INFO L87 Difference]: Start difference. First operand 2847 states and 4683 transitions. Second operand 3 states. [2020-07-21 02:30:00,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:00,049 INFO L93 Difference]: Finished difference Result 8232 states and 13497 transitions. [2020-07-21 02:30:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:00,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-21 02:30:00,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:00,083 INFO L225 Difference]: With dead ends: 8232 [2020-07-21 02:30:00,083 INFO L226 Difference]: Without dead ends: 5614 [2020-07-21 02:30:00,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5614 states. [2020-07-21 02:30:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5614 to 5612. [2020-07-21 02:30:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5612 states. [2020-07-21 02:30:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5612 states to 5612 states and 9200 transitions. [2020-07-21 02:30:00,397 INFO L78 Accepts]: Start accepts. Automaton has 5612 states and 9200 transitions. Word has length 498 [2020-07-21 02:30:00,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:00,403 INFO L479 AbstractCegarLoop]: Abstraction has 5612 states and 9200 transitions. [2020-07-21 02:30:00,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5612 states and 9200 transitions. [2020-07-21 02:30:00,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 02:30:00,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:00,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:00,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:00,662 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:00,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:00,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1909603127, now seen corresponding path program 1 times [2020-07-21 02:30:00,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:00,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976176368] [2020-07-21 02:30:00,665 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:01,048 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:30:01,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:01,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:01,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:01,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:01,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976176368] [2020-07-21 02:30:01,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:01,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:01,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580832085] [2020-07-21 02:30:01,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:01,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:01,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:01,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:01,214 INFO L87 Difference]: Start difference. First operand 5612 states and 9200 transitions. Second operand 3 states. [2020-07-21 02:30:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:01,510 INFO L93 Difference]: Finished difference Result 16580 states and 27137 transitions. [2020-07-21 02:30:01,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:01,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-21 02:30:01,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:01,564 INFO L225 Difference]: With dead ends: 16580 [2020-07-21 02:30:01,564 INFO L226 Difference]: Without dead ends: 10999 [2020-07-21 02:30:01,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:01,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10999 states. [2020-07-21 02:30:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10999 to 5638. [2020-07-21 02:30:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5638 states. [2020-07-21 02:30:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5638 states to 5638 states and 9238 transitions. [2020-07-21 02:30:01,953 INFO L78 Accepts]: Start accepts. Automaton has 5638 states and 9238 transitions. Word has length 499 [2020-07-21 02:30:01,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:01,954 INFO L479 AbstractCegarLoop]: Abstraction has 5638 states and 9238 transitions. [2020-07-21 02:30:01,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:01,954 INFO L276 IsEmpty]: Start isEmpty. Operand 5638 states and 9238 transitions. [2020-07-21 02:30:01,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 02:30:01,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:01,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:02,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:02,250 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:02,251 INFO L82 PathProgramCache]: Analyzing trace with hash -609208427, now seen corresponding path program 1 times [2020-07-21 02:30:02,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:02,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550137280] [2020-07-21 02:30:02,252 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:02,607 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:30:02,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:02,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 1730 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:30:02,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:02,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:02,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550137280] [2020-07-21 02:30:02,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:02,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:30:02,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295885043] [2020-07-21 02:30:02,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:30:02,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:02,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:30:02,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:30:02,764 INFO L87 Difference]: Start difference. First operand 5638 states and 9238 transitions. Second operand 4 states. [2020-07-21 02:30:03,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:03,426 INFO L93 Difference]: Finished difference Result 13306 states and 21986 transitions. [2020-07-21 02:30:03,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:30:03,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-07-21 02:30:03,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:03,460 INFO L225 Difference]: With dead ends: 13306 [2020-07-21 02:30:03,460 INFO L226 Difference]: Without dead ends: 6729 [2020-07-21 02:30:03,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:30:03,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6729 states. [2020-07-21 02:30:03,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6729 to 6727. [2020-07-21 02:30:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6727 states. [2020-07-21 02:30:03,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 11081 transitions. [2020-07-21 02:30:03,801 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 11081 transitions. Word has length 500 [2020-07-21 02:30:03,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:03,801 INFO L479 AbstractCegarLoop]: Abstraction has 6727 states and 11081 transitions. [2020-07-21 02:30:03,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:30:03,802 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 11081 transitions. [2020-07-21 02:30:03,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 02:30:03,827 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:03,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:04,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:04,041 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:04,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:04,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1856068473, now seen corresponding path program 1 times [2020-07-21 02:30:04,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:04,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362189262] [2020-07-21 02:30:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:04,455 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:04,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:04,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 2123 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:04,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:04,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:04,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362189262] [2020-07-21 02:30:04,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:04,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:04,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104872359] [2020-07-21 02:30:04,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:04,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:04,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:04,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:04,652 INFO L87 Difference]: Start difference. First operand 6727 states and 11081 transitions. Second operand 3 states. [2020-07-21 02:30:05,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:05,087 INFO L93 Difference]: Finished difference Result 12122 states and 19636 transitions. [2020-07-21 02:30:05,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:05,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-21 02:30:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:05,117 INFO L225 Difference]: With dead ends: 12122 [2020-07-21 02:30:05,117 INFO L226 Difference]: Without dead ends: 8633 [2020-07-21 02:30:05,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:05,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8633 states. [2020-07-21 02:30:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8633 to 7543. [2020-07-21 02:30:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7543 states. [2020-07-21 02:30:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7543 states to 7543 states and 12422 transitions. [2020-07-21 02:30:05,529 INFO L78 Accepts]: Start accepts. Automaton has 7543 states and 12422 transitions. Word has length 502 [2020-07-21 02:30:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:05,530 INFO L479 AbstractCegarLoop]: Abstraction has 7543 states and 12422 transitions. [2020-07-21 02:30:05,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 7543 states and 12422 transitions. [2020-07-21 02:30:05,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 02:30:05,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:05,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:05,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:05,772 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:05,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:05,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2111871510, now seen corresponding path program 1 times [2020-07-21 02:30:05,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:05,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989288230] [2020-07-21 02:30:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:06,195 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:06,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:06,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 2119 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:06,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:06,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:06,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989288230] [2020-07-21 02:30:06,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:06,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:06,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046663792] [2020-07-21 02:30:06,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:06,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:06,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:06,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:06,885 INFO L87 Difference]: Start difference. First operand 7543 states and 12422 transitions. Second operand 3 states. [2020-07-21 02:30:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:07,390 INFO L93 Difference]: Finished difference Result 22110 states and 36369 transitions. [2020-07-21 02:30:07,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:07,391 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-21 02:30:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:07,431 INFO L225 Difference]: With dead ends: 22110 [2020-07-21 02:30:07,431 INFO L226 Difference]: Without dead ends: 14943 [2020-07-21 02:30:07,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:07,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14943 states. [2020-07-21 02:30:07,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14943 to 14941. [2020-07-21 02:30:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14941 states. [2020-07-21 02:30:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14941 states to 14941 states and 24519 transitions. [2020-07-21 02:30:07,992 INFO L78 Accepts]: Start accepts. Automaton has 14941 states and 24519 transitions. Word has length 502 [2020-07-21 02:30:07,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:07,992 INFO L479 AbstractCegarLoop]: Abstraction has 14941 states and 24519 transitions. [2020-07-21 02:30:07,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 14941 states and 24519 transitions. [2020-07-21 02:30:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 02:30:08,023 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:08,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:08,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:08,237 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:08,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:08,238 INFO L82 PathProgramCache]: Analyzing trace with hash 105142257, now seen corresponding path program 1 times [2020-07-21 02:30:08,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:08,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618828523] [2020-07-21 02:30:08,240 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:08,594 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:30:08,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:08,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 1733 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:08,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:08,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:08,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618828523] [2020-07-21 02:30:08,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:08,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:08,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128269049] [2020-07-21 02:30:08,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:08,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:08,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:08,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:08,855 INFO L87 Difference]: Start difference. First operand 14941 states and 24519 transitions. Second operand 3 states. [2020-07-21 02:30:09,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:09,367 INFO L93 Difference]: Finished difference Result 44542 states and 73082 transitions. [2020-07-21 02:30:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:09,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-21 02:30:09,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:09,439 INFO L225 Difference]: With dead ends: 44542 [2020-07-21 02:30:09,439 INFO L226 Difference]: Without dead ends: 29738 [2020-07-21 02:30:09,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:09,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29738 states. [2020-07-21 02:30:10,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29738 to 15034. [2020-07-21 02:30:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15034 states. [2020-07-21 02:30:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15034 states to 15034 states and 24660 transitions. [2020-07-21 02:30:10,276 INFO L78 Accepts]: Start accepts. Automaton has 15034 states and 24660 transitions. Word has length 502 [2020-07-21 02:30:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:10,277 INFO L479 AbstractCegarLoop]: Abstraction has 15034 states and 24660 transitions. [2020-07-21 02:30:10,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 15034 states and 24660 transitions. [2020-07-21 02:30:10,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-07-21 02:30:10,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:10,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:10,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:10,514 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:10,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:10,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1234824133, now seen corresponding path program 1 times [2020-07-21 02:30:10,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:10,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080307475] [2020-07-21 02:30:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:10,858 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:30:10,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:10,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1730 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:10,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:11,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:11,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080307475] [2020-07-21 02:30:11,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:11,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:11,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206334472] [2020-07-21 02:30:11,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:11,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:11,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:11,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:11,015 INFO L87 Difference]: Start difference. First operand 15034 states and 24660 transitions. Second operand 3 states. [2020-07-21 02:30:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:11,673 INFO L93 Difference]: Finished difference Result 44158 states and 72386 transitions. [2020-07-21 02:30:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:11,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 503 [2020-07-21 02:30:11,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:11,716 INFO L225 Difference]: With dead ends: 44158 [2020-07-21 02:30:11,716 INFO L226 Difference]: Without dead ends: 29610 [2020-07-21 02:30:11,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:11,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29610 states. [2020-07-21 02:30:12,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29610 to 15186. [2020-07-21 02:30:12,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15186 states. [2020-07-21 02:30:12,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15186 states to 15186 states and 24884 transitions. [2020-07-21 02:30:12,288 INFO L78 Accepts]: Start accepts. Automaton has 15186 states and 24884 transitions. Word has length 503 [2020-07-21 02:30:12,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:12,289 INFO L479 AbstractCegarLoop]: Abstraction has 15186 states and 24884 transitions. [2020-07-21 02:30:12,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:12,289 INFO L276 IsEmpty]: Start isEmpty. Operand 15186 states and 24884 transitions. [2020-07-21 02:30:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-07-21 02:30:12,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:12,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:12,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:12,510 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:12,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:12,512 INFO L82 PathProgramCache]: Analyzing trace with hash 406815726, now seen corresponding path program 1 times [2020-07-21 02:30:12,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:12,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910162127] [2020-07-21 02:30:12,513 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:12,857 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:30:12,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:12,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 1732 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:12,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:13,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:13,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910162127] [2020-07-21 02:30:13,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:13,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:13,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810128176] [2020-07-21 02:30:13,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:13,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:13,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:13,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:13,544 INFO L87 Difference]: Start difference. First operand 15186 states and 24884 transitions. Second operand 3 states. [2020-07-21 02:30:14,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:14,702 INFO L93 Difference]: Finished difference Result 45169 states and 73994 transitions. [2020-07-21 02:30:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:14,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 503 [2020-07-21 02:30:14,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:14,766 INFO L225 Difference]: With dead ends: 45169 [2020-07-21 02:30:14,766 INFO L226 Difference]: Without dead ends: 30174 [2020-07-21 02:30:14,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30174 states. [2020-07-21 02:30:15,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30174 to 15318. [2020-07-21 02:30:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15318 states. [2020-07-21 02:30:15,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15318 states to 15318 states and 25055 transitions. [2020-07-21 02:30:15,489 INFO L78 Accepts]: Start accepts. Automaton has 15318 states and 25055 transitions. Word has length 503 [2020-07-21 02:30:15,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:15,490 INFO L479 AbstractCegarLoop]: Abstraction has 15318 states and 25055 transitions. [2020-07-21 02:30:15,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:15,490 INFO L276 IsEmpty]: Start isEmpty. Operand 15318 states and 25055 transitions. [2020-07-21 02:30:15,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 02:30:15,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:15,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:15,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:15,708 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:15,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:15,709 INFO L82 PathProgramCache]: Analyzing trace with hash -504006859, now seen corresponding path program 1 times [2020-07-21 02:30:15,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:15,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474685145] [2020-07-21 02:30:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:16,185 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:16,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:16,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 2117 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:16,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:16,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:16,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474685145] [2020-07-21 02:30:16,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:16,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:16,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206206582] [2020-07-21 02:30:16,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:16,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:16,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:16,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:16,378 INFO L87 Difference]: Start difference. First operand 15318 states and 25055 transitions. Second operand 3 states. [2020-07-21 02:30:17,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:17,133 INFO L93 Difference]: Finished difference Result 43536 states and 71074 transitions. [2020-07-21 02:30:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:17,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-21 02:30:17,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:17,166 INFO L225 Difference]: With dead ends: 43536 [2020-07-21 02:30:17,166 INFO L226 Difference]: Without dead ends: 29762 [2020-07-21 02:30:17,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:17,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29762 states. [2020-07-21 02:30:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29762 to 29760. [2020-07-21 02:30:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29760 states. [2020-07-21 02:30:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29760 states to 29760 states and 48490 transitions. [2020-07-21 02:30:18,159 INFO L78 Accepts]: Start accepts. Automaton has 29760 states and 48490 transitions. Word has length 504 [2020-07-21 02:30:18,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:18,159 INFO L479 AbstractCegarLoop]: Abstraction has 29760 states and 48490 transitions. [2020-07-21 02:30:18,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand 29760 states and 48490 transitions. [2020-07-21 02:30:18,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 02:30:18,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:18,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:18,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:18,383 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:18,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:18,384 INFO L82 PathProgramCache]: Analyzing trace with hash 59569345, now seen corresponding path program 1 times [2020-07-21 02:30:18,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:18,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111735177] [2020-07-21 02:30:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:18,788 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:18,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:18,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 2121 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:18,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:18,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:18,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111735177] [2020-07-21 02:30:18,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:18,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:18,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233846197] [2020-07-21 02:30:18,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:18,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:18,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:18,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:18,916 INFO L87 Difference]: Start difference. First operand 29760 states and 48490 transitions. Second operand 3 states. [2020-07-21 02:30:20,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:20,172 INFO L93 Difference]: Finished difference Result 55604 states and 89780 transitions. [2020-07-21 02:30:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:20,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-21 02:30:20,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:20,209 INFO L225 Difference]: With dead ends: 55604 [2020-07-21 02:30:20,209 INFO L226 Difference]: Without dead ends: 39458 [2020-07-21 02:30:20,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39458 states. [2020-07-21 02:30:22,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39458 to 35488. [2020-07-21 02:30:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35488 states. [2020-07-21 02:30:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35488 states to 35488 states and 57922 transitions. [2020-07-21 02:30:22,440 INFO L78 Accepts]: Start accepts. Automaton has 35488 states and 57922 transitions. Word has length 504 [2020-07-21 02:30:22,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:22,441 INFO L479 AbstractCegarLoop]: Abstraction has 35488 states and 57922 transitions. [2020-07-21 02:30:22,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 35488 states and 57922 transitions. [2020-07-21 02:30:22,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 02:30:22,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:22,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:22,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:22,684 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:22,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:22,685 INFO L82 PathProgramCache]: Analyzing trace with hash -129707110, now seen corresponding path program 1 times [2020-07-21 02:30:22,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:22,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153804289] [2020-07-21 02:30:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:23,098 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:23,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:23,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:30:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:23,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:23,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153804289] [2020-07-21 02:30:23,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:23,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 02:30:23,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717914350] [2020-07-21 02:30:23,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:30:23,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:23,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:30:23,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:30:23,362 INFO L87 Difference]: Start difference. First operand 35488 states and 57922 transitions. Second operand 5 states. [2020-07-21 02:30:25,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:25,658 INFO L93 Difference]: Finished difference Result 57998 states and 93739 transitions. [2020-07-21 02:30:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:30:25,658 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 505 [2020-07-21 02:30:25,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:25,705 INFO L225 Difference]: With dead ends: 57998 [2020-07-21 02:30:25,706 INFO L226 Difference]: Without dead ends: 35488 [2020-07-21 02:30:25,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 02:30:25,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35488 states. [2020-07-21 02:30:27,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35488 to 35488. [2020-07-21 02:30:27,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35488 states. [2020-07-21 02:30:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35488 states to 35488 states and 57614 transitions. [2020-07-21 02:30:27,450 INFO L78 Accepts]: Start accepts. Automaton has 35488 states and 57614 transitions. Word has length 505 [2020-07-21 02:30:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:27,450 INFO L479 AbstractCegarLoop]: Abstraction has 35488 states and 57614 transitions. [2020-07-21 02:30:27,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:30:27,450 INFO L276 IsEmpty]: Start isEmpty. Operand 35488 states and 57614 transitions. [2020-07-21 02:30:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 02:30:27,479 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:27,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:27,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:27,694 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:27,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:27,695 INFO L82 PathProgramCache]: Analyzing trace with hash -558897505, now seen corresponding path program 1 times [2020-07-21 02:30:27,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:27,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590610802] [2020-07-21 02:30:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:28,100 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:28,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:28,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 2127 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:30:28,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:28,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:28,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590610802] [2020-07-21 02:30:28,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:28,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:30:28,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675245730] [2020-07-21 02:30:28,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:30:28,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:28,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:30:28,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:30:28,494 INFO L87 Difference]: Start difference. First operand 35488 states and 57614 transitions. Second operand 4 states. [2020-07-21 02:30:31,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:31,041 INFO L93 Difference]: Finished difference Result 104814 states and 170325 transitions. [2020-07-21 02:30:31,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:30:31,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-21 02:30:31,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:31,108 INFO L225 Difference]: With dead ends: 104814 [2020-07-21 02:30:31,108 INFO L226 Difference]: Without dead ends: 69767 [2020-07-21 02:30:31,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:30:31,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69767 states. [2020-07-21 02:30:35,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69767 to 69712. [2020-07-21 02:30:35,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69712 states. [2020-07-21 02:30:35,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69712 states to 69712 states and 112820 transitions. [2020-07-21 02:30:35,222 INFO L78 Accepts]: Start accepts. Automaton has 69712 states and 112820 transitions. Word has length 505 [2020-07-21 02:30:35,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:35,223 INFO L479 AbstractCegarLoop]: Abstraction has 69712 states and 112820 transitions. [2020-07-21 02:30:35,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:30:35,223 INFO L276 IsEmpty]: Start isEmpty. Operand 69712 states and 112820 transitions. [2020-07-21 02:30:35,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-21 02:30:35,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:35,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:35,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:35,462 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:35,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:35,463 INFO L82 PathProgramCache]: Analyzing trace with hash -7423292, now seen corresponding path program 1 times [2020-07-21 02:30:35,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:35,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307636507] [2020-07-21 02:30:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:35,804 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:30:35,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:35,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1733 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:35,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:35,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:35,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307636507] [2020-07-21 02:30:35,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:35,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:35,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392672185] [2020-07-21 02:30:35,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:35,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:35,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:35,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:35,921 INFO L87 Difference]: Start difference. First operand 69712 states and 112820 transitions. Second operand 3 states. [2020-07-21 02:30:40,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:40,574 INFO L93 Difference]: Finished difference Result 201189 states and 325088 transitions. [2020-07-21 02:30:40,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:40,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 506 [2020-07-21 02:30:40,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:40,721 INFO L225 Difference]: With dead ends: 201189 [2020-07-21 02:30:40,721 INFO L226 Difference]: Without dead ends: 131703 [2020-07-21 02:30:40,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:40,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131703 states. [2020-07-21 02:30:45,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131703 to 69195. [2020-07-21 02:30:45,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69195 states. [2020-07-21 02:30:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69195 states to 69195 states and 111990 transitions. [2020-07-21 02:30:46,052 INFO L78 Accepts]: Start accepts. Automaton has 69195 states and 111990 transitions. Word has length 506 [2020-07-21 02:30:46,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:46,052 INFO L479 AbstractCegarLoop]: Abstraction has 69195 states and 111990 transitions. [2020-07-21 02:30:46,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:46,052 INFO L276 IsEmpty]: Start isEmpty. Operand 69195 states and 111990 transitions. [2020-07-21 02:30:46,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 02:30:46,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:46,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:46,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:46,292 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:46,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:46,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2119082250, now seen corresponding path program 1 times [2020-07-21 02:30:46,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:46,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015331366] [2020-07-21 02:30:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:46,687 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:30:46,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:46,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:46,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:46,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:46,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015331366] [2020-07-21 02:30:46,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:46,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:46,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694161454] [2020-07-21 02:30:46,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:46,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:46,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:46,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:46,895 INFO L87 Difference]: Start difference. First operand 69195 states and 111990 transitions. Second operand 3 states. [2020-07-21 02:30:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:51,947 INFO L93 Difference]: Finished difference Result 200941 states and 324804 transitions. [2020-07-21 02:30:51,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:51,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-07-21 02:30:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:52,081 INFO L225 Difference]: With dead ends: 200941 [2020-07-21 02:30:52,081 INFO L226 Difference]: Without dead ends: 135147 [2020-07-21 02:30:52,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:52,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135147 states. [2020-07-21 02:30:59,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135147 to 135145. [2020-07-21 02:30:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135145 states. [2020-07-21 02:30:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135145 states to 135145 states and 217780 transitions. [2020-07-21 02:30:59,812 INFO L78 Accepts]: Start accepts. Automaton has 135145 states and 217780 transitions. Word has length 507 [2020-07-21 02:30:59,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:59,813 INFO L479 AbstractCegarLoop]: Abstraction has 135145 states and 217780 transitions. [2020-07-21 02:30:59,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:59,813 INFO L276 IsEmpty]: Start isEmpty. Operand 135145 states and 217780 transitions. [2020-07-21 02:30:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 02:30:59,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:59,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:31:00,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:00,092 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:31:00,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:31:00,093 INFO L82 PathProgramCache]: Analyzing trace with hash 474239812, now seen corresponding path program 1 times [2020-07-21 02:31:00,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:31:00,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108938956] [2020-07-21 02:31:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:00,439 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:31:00,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:31:00,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 1734 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:31:00,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:31:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:31:00,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:31:00,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108938956] [2020-07-21 02:31:00,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:31:00,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:31:00,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167168922] [2020-07-21 02:31:00,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:31:00,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:31:00,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:31:00,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:31:00,984 INFO L87 Difference]: Start difference. First operand 135145 states and 217780 transitions. Second operand 3 states. [2020-07-21 02:31:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:31:13,064 INFO L93 Difference]: Finished difference Result 401134 states and 646031 transitions. [2020-07-21 02:31:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:31:13,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-07-21 02:31:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:31:13,336 INFO L225 Difference]: With dead ends: 401134 [2020-07-21 02:31:13,337 INFO L226 Difference]: Without dead ends: 266704 [2020-07-21 02:31:13,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:31:13,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266704 states. [2020-07-21 02:31:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266704 to 134905. [2020-07-21 02:31:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134905 states. [2020-07-21 02:31:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134905 states to 134905 states and 217385 transitions. [2020-07-21 02:31:21,054 INFO L78 Accepts]: Start accepts. Automaton has 134905 states and 217385 transitions. Word has length 507 [2020-07-21 02:31:21,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:31:21,055 INFO L479 AbstractCegarLoop]: Abstraction has 134905 states and 217385 transitions. [2020-07-21 02:31:21,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:31:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 134905 states and 217385 transitions. [2020-07-21 02:31:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-21 02:31:21,156 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:31:21,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:31:21,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:21,358 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:31:21,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:31:21,359 INFO L82 PathProgramCache]: Analyzing trace with hash 409248422, now seen corresponding path program 1 times [2020-07-21 02:31:21,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:31:21,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197270026] [2020-07-21 02:31:21,360 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:21,706 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:31:21,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:31:21,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1732 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:31:21,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:31:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:31:21,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:31:21,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197270026] [2020-07-21 02:31:21,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:31:21,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:31:21,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425790848] [2020-07-21 02:31:21,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:31:21,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:31:21,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:31:21,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:31:21,817 INFO L87 Difference]: Start difference. First operand 134905 states and 217385 transitions. Second operand 4 states. [2020-07-21 02:31:35,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:31:35,536 INFO L93 Difference]: Finished difference Result 388857 states and 624301 transitions. [2020-07-21 02:31:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:31:35,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 508 [2020-07-21 02:31:35,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:31:35,829 INFO L225 Difference]: With dead ends: 388857 [2020-07-21 02:31:35,830 INFO L226 Difference]: Without dead ends: 264247 [2020-07-21 02:31:35,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:31:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264247 states. [2020-07-21 02:31:48,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264247 to 143097. [2020-07-21 02:31:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143097 states. [2020-07-21 02:31:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143097 states to 143097 states and 231715 transitions. [2020-07-21 02:31:48,663 INFO L78 Accepts]: Start accepts. Automaton has 143097 states and 231715 transitions. Word has length 508 [2020-07-21 02:31:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:31:48,663 INFO L479 AbstractCegarLoop]: Abstraction has 143097 states and 231715 transitions. [2020-07-21 02:31:48,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:31:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 143097 states and 231715 transitions. [2020-07-21 02:31:48,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-21 02:31:48,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:31:48,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:31:48,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:48,949 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:31:48,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:31:48,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1720422449, now seen corresponding path program 1 times [2020-07-21 02:31:48,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:31:48,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31165255] [2020-07-21 02:31:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:49,306 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:31:49,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:31:49,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:31:49,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:31:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:31:49,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:31:49,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31165255] [2020-07-21 02:31:49,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:31:49,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:31:49,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395715362] [2020-07-21 02:31:49,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:31:49,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:31:49,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:31:49,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:31:49,423 INFO L87 Difference]: Start difference. First operand 143097 states and 231715 transitions. Second operand 4 states. [2020-07-21 02:31:59,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:31:59,125 INFO L93 Difference]: Finished difference Result 332960 states and 541798 transitions. [2020-07-21 02:31:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:31:59,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 509 [2020-07-21 02:31:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:31:59,305 INFO L225 Difference]: With dead ends: 332960 [2020-07-21 02:31:59,305 INFO L226 Difference]: Without dead ends: 171438 [2020-07-21 02:31:59,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:31:59,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171438 states. [2020-07-21 02:32:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171438 to 171334. [2020-07-21 02:32:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171334 states. [2020-07-21 02:32:11,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171334 states to 171334 states and 278194 transitions. [2020-07-21 02:32:11,885 INFO L78 Accepts]: Start accepts. Automaton has 171334 states and 278194 transitions. Word has length 509 [2020-07-21 02:32:11,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:32:11,885 INFO L479 AbstractCegarLoop]: Abstraction has 171334 states and 278194 transitions. [2020-07-21 02:32:11,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:32:11,886 INFO L276 IsEmpty]: Start isEmpty. Operand 171334 states and 278194 transitions. [2020-07-21 02:32:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-07-21 02:32:11,991 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:32:11,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:32:12,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:32:12,192 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:32:12,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:32:12,193 INFO L82 PathProgramCache]: Analyzing trace with hash -892785757, now seen corresponding path program 1 times [2020-07-21 02:32:12,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:32:12,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93685636] [2020-07-21 02:32:12,195 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:32:12,542 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:32:12,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:32:12,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 1732 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:32:12,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:32:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:32:12,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:32:12,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93685636] [2020-07-21 02:32:12,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:32:12,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:32:12,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386289579] [2020-07-21 02:32:12,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:32:12,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:32:12,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:32:12,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:32:12,669 INFO L87 Difference]: Start difference. First operand 171334 states and 278194 transitions. Second operand 4 states. [2020-07-21 02:32:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:32:32,007 INFO L93 Difference]: Finished difference Result 468605 states and 755899 transitions. [2020-07-21 02:32:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:32:32,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 510 [2020-07-21 02:32:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:32:32,366 INFO L225 Difference]: With dead ends: 468605 [2020-07-21 02:32:32,367 INFO L226 Difference]: Without dead ends: 320887 [2020-07-21 02:32:32,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:32:32,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320887 states. [2020-07-21 02:32:44,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320887 to 189932. [2020-07-21 02:32:44,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189932 states. [2020-07-21 02:32:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189932 states to 189932 states and 309805 transitions. [2020-07-21 02:32:44,835 INFO L78 Accepts]: Start accepts. Automaton has 189932 states and 309805 transitions. Word has length 510 [2020-07-21 02:32:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:32:44,835 INFO L479 AbstractCegarLoop]: Abstraction has 189932 states and 309805 transitions. [2020-07-21 02:32:44,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:32:44,835 INFO L276 IsEmpty]: Start isEmpty. Operand 189932 states and 309805 transitions. [2020-07-21 02:32:44,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-07-21 02:32:44,980 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:32:44,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (20)] Forcibly destroying the process [2020-07-21 02:32:45,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:32:45,574 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:32:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:32:45,574 INFO L82 PathProgramCache]: Analyzing trace with hash -349826152, now seen corresponding path program 1 times [2020-07-21 02:32:45,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:32:45,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45150126] [2020-07-21 02:32:45,575 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:32:45,979 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:32:45,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:32:45,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:32:45,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:32:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:32:46,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:32:46,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45150126] [2020-07-21 02:32:46,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:32:46,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:32:46,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857537463] [2020-07-21 02:32:46,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:32:46,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:32:46,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:32:46,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:32:46,189 INFO L87 Difference]: Start difference. First operand 189932 states and 309805 transitions. Second operand 3 states. [2020-07-21 02:33:06,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:33:06,801 INFO L93 Difference]: Finished difference Result 527154 states and 854409 transitions. [2020-07-21 02:33:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:33:06,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 510 [2020-07-21 02:33:06,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:33:07,205 INFO L225 Difference]: With dead ends: 527154 [2020-07-21 02:33:07,205 INFO L226 Difference]: Without dead ends: 362783 [2020-07-21 02:33:07,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:33:08,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362783 states. [2020-07-21 02:33:37,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362783 to 362781. [2020-07-21 02:33:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362781 states. [2020-07-21 02:33:38,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362781 states to 362781 states and 587686 transitions. [2020-07-21 02:33:38,426 INFO L78 Accepts]: Start accepts. Automaton has 362781 states and 587686 transitions. Word has length 510 [2020-07-21 02:33:38,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:33:38,427 INFO L479 AbstractCegarLoop]: Abstraction has 362781 states and 587686 transitions. [2020-07-21 02:33:38,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:33:38,427 INFO L276 IsEmpty]: Start isEmpty. Operand 362781 states and 587686 transitions. [2020-07-21 02:33:38,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2020-07-21 02:33:38,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:33:38,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:33:38,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:38,925 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:33:38,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:33:38,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1196365985, now seen corresponding path program 1 times [2020-07-21 02:33:38,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:33:38,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316217035] [2020-07-21 02:33:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:39,315 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:33:39,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:33:39,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 2128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:33:39,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:33:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:33:39,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:33:39,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316217035] [2020-07-21 02:33:39,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:33:39,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:33:39,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813114880] [2020-07-21 02:33:39,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:33:39,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:33:39,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:33:39,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:33:39,944 INFO L87 Difference]: Start difference. First operand 362781 states and 587686 transitions. Second operand 3 states. [2020-07-21 02:34:24,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:34:24,566 INFO L93 Difference]: Finished difference Result 1017381 states and 1640479 transitions. [2020-07-21 02:34:24,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:34:24,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 513 [2020-07-21 02:34:24,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:34:25,428 INFO L225 Difference]: With dead ends: 1017381 [2020-07-21 02:34:25,428 INFO L226 Difference]: Without dead ends: 705097 [2020-07-21 02:34:25,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:34:26,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705097 states. [2020-07-21 02:35:27,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705097 to 705095. [2020-07-21 02:35:27,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705095 states. [2020-07-21 02:35:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705095 states to 705095 states and 1136355 transitions. [2020-07-21 02:35:29,112 INFO L78 Accepts]: Start accepts. Automaton has 705095 states and 1136355 transitions. Word has length 513 [2020-07-21 02:35:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:35:29,112 INFO L479 AbstractCegarLoop]: Abstraction has 705095 states and 1136355 transitions. [2020-07-21 02:35:29,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:35:29,113 INFO L276 IsEmpty]: Start isEmpty. Operand 705095 states and 1136355 transitions. [2020-07-21 02:35:29,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2020-07-21 02:35:29,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:35:29,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:35:29,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:35:29,883 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:35:29,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:35:29,884 INFO L82 PathProgramCache]: Analyzing trace with hash 149757933, now seen corresponding path program 1 times [2020-07-21 02:35:29,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:35:29,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385272761] [2020-07-21 02:35:29,885 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:35:30,288 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:35:30,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:35:30,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 2134 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:35:30,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:35:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:35:30,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:35:30,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385272761] [2020-07-21 02:35:30,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:35:30,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:35:30,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436671342] [2020-07-21 02:35:30,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:35:30,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:35:30,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:35:30,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:35:30,507 INFO L87 Difference]: Start difference. First operand 705095 states and 1136355 transitions. Second operand 4 states. [2020-07-21 02:37:13,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:37:13,603 INFO L93 Difference]: Finished difference Result 2091240 states and 3369476 transitions. [2020-07-21 02:37:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:37:13,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 514 [2020-07-21 02:37:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:37:15,429 INFO L225 Difference]: With dead ends: 2091240 [2020-07-21 02:37:15,429 INFO L226 Difference]: Without dead ends: 1392472 [2020-07-21 02:37:16,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:37:17,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392472 states.