/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.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:19:58,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:19:58,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:19:58,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:19:58,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:19:58,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:19:58,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:19:58,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:19:58,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:19:58,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:19:58,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:19:58,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:19:58,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:19:58,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:19:58,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:19:58,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:19:58,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:19:58,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:19:58,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:19:58,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:19:58,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:19:58,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:19:58,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:19:58,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:19:58,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:19:58,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:19:58,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:19:58,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:19:58,825 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 02:19:58,861 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:19:58,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:19:58,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:19:58,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:19:58,864 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:19:58,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:19:58,864 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:19:58,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:19:58,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:19:58,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:19:58,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:19:58,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:19:58,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:19:58,867 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:19:58,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:19:58,867 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:19:58,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:19:58,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:19:58,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:19:58,868 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:19:58,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:19:58,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:19:58,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:19:58,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:19:58,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:19:58,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:19:58,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:58,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:19:58,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:19:58,870 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 02:19:59,144 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:19:59,157 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:19:59,160 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:19:59,162 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:19:59,162 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:19:59,163 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 02:19:59,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b86226fb/8248e95dd1f94aeaa0f097615cd613a1/FLAGcffce7587 [2020-07-21 02:19:59,790 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:19:59,792 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 02:19:59,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b86226fb/8248e95dd1f94aeaa0f097615cd613a1/FLAGcffce7587 [2020-07-21 02:19:59,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b86226fb/8248e95dd1f94aeaa0f097615cd613a1 [2020-07-21 02:20:00,002 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:20:00,004 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:20:00,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:20:00,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:20:00,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:20:00,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:19:59" (1/1) ... [2020-07-21 02:20:00,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a49fa7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:00, skipping insertion in model container [2020-07-21 02:20:00,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:19:59" (1/1) ... [2020-07-21 02:20:00,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:20:00,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:20:01,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:20:01,083 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:20:01,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:20:01,860 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:20:01,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:01 WrapperNode [2020-07-21 02:20:01,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:20:01,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:20:01,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:20:01,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:20:01,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:01" (1/1) ... [2020-07-21 02:20:01,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:01" (1/1) ... [2020-07-21 02:20:01,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:01" (1/1) ... [2020-07-21 02:20:01,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:01" (1/1) ... [2020-07-21 02:20:01,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:01" (1/1) ... [2020-07-21 02:20:02,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:01" (1/1) ... [2020-07-21 02:20:02,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:01" (1/1) ... [2020-07-21 02:20:02,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:20:02,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:20:02,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:20:02,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:20:02,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:01" (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 02:20:02,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:20:02,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:20:02,108 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:20:02,108 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:20:02,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:20:02,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 02:20:02,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 02:20:02,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 02:20:02,109 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 02:20:02,109 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:20:02,110 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:20:02,110 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 02:20:02,110 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 02:20:02,110 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 02:20:02,110 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 02:20:02,111 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 02:20:02,111 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 02:20:02,111 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 02:20:02,111 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 02:20:02,111 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:20:02,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:20:02,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:20:04,497 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:20:04,497 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 02:20:04,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:20:04 BoogieIcfgContainer [2020-07-21 02:20:04,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:20:04,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:20:04,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:20:04,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:20:04,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:19:59" (1/3) ... [2020-07-21 02:20:04,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce1bf47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:20:04, skipping insertion in model container [2020-07-21 02:20:04,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:20:01" (2/3) ... [2020-07-21 02:20:04,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce1bf47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:20:04, skipping insertion in model container [2020-07-21 02:20:04,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:20:04" (3/3) ... [2020-07-21 02:20:04,515 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 02:20:04,526 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:20:04,535 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 02:20:04,549 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 02:20:04,577 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:20:04,577 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:20:04,577 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:20:04,577 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:20:04,577 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:20:04,578 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:20:04,578 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:20:04,578 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:20:04,610 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-07-21 02:20:04,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-21 02:20:04,640 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:04,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:04,641 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:04,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:04,648 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-07-21 02:20:04,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:04,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275546116] [2020-07-21 02:20:04,659 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 02:20:05,249 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:05,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:05,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:20:05,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:05,586 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 02:20:05,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:05,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275546116] [2020-07-21 02:20:05,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:05,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:20:05,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359501647] [2020-07-21 02:20:05,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:20:05,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:05,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:20:05,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:20:05,612 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 4 states. [2020-07-21 02:20:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:05,886 INFO L93 Difference]: Finished difference Result 2337 states and 4143 transitions. [2020-07-21 02:20:05,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:20:05,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-21 02:20:05,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:05,915 INFO L225 Difference]: With dead ends: 2337 [2020-07-21 02:20:05,915 INFO L226 Difference]: Without dead ends: 1546 [2020-07-21 02:20:05,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 315 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 02:20:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-07-21 02:20:06,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-07-21 02:20:06,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-07-21 02:20:06,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2409 transitions. [2020-07-21 02:20:06,074 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2409 transitions. Word has length 318 [2020-07-21 02:20:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:06,077 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2409 transitions. [2020-07-21 02:20:06,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:20:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2409 transitions. [2020-07-21 02:20:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-21 02:20:06,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:06,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:06,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:06,309 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:06,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1737976142, now seen corresponding path program 1 times [2020-07-21 02:20:06,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:06,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065880794] [2020-07-21 02:20:06,311 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 02:20:06,672 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:06,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:06,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:06,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:06,848 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 02:20:06,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:06,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065880794] [2020-07-21 02:20:06,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:06,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:06,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021144668] [2020-07-21 02:20:06,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:06,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:06,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:06,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:06,852 INFO L87 Difference]: Start difference. First operand 1544 states and 2409 transitions. Second operand 3 states. [2020-07-21 02:20:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:07,014 INFO L93 Difference]: Finished difference Result 4418 states and 6858 transitions. [2020-07-21 02:20:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:07,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 320 [2020-07-21 02:20:07,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:07,032 INFO L225 Difference]: With dead ends: 4418 [2020-07-21 02:20:07,032 INFO L226 Difference]: Without dead ends: 3014 [2020-07-21 02:20:07,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 318 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 02:20:07,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2020-07-21 02:20:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 3012. [2020-07-21 02:20:07,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3012 states. [2020-07-21 02:20:07,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 4674 transitions. [2020-07-21 02:20:07,144 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 4674 transitions. Word has length 320 [2020-07-21 02:20:07,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:07,145 INFO L479 AbstractCegarLoop]: Abstraction has 3012 states and 4674 transitions. [2020-07-21 02:20:07,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 4674 transitions. [2020-07-21 02:20:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-21 02:20:07,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:07,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:07,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:07,370 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:07,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:07,371 INFO L82 PathProgramCache]: Analyzing trace with hash -943715885, now seen corresponding path program 1 times [2020-07-21 02:20:07,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:07,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704152061] [2020-07-21 02:20:07,373 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 02:20:07,622 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:07,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:07,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:07,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:07,762 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 02:20:07,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:07,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704152061] [2020-07-21 02:20:07,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:07,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:07,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966910555] [2020-07-21 02:20:07,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:07,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:07,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:07,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:07,769 INFO L87 Difference]: Start difference. First operand 3012 states and 4674 transitions. Second operand 3 states. [2020-07-21 02:20:07,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:07,961 INFO L93 Difference]: Finished difference Result 8877 states and 13746 transitions. [2020-07-21 02:20:07,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:07,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 320 [2020-07-21 02:20:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:07,990 INFO L225 Difference]: With dead ends: 8877 [2020-07-21 02:20:07,990 INFO L226 Difference]: Without dead ends: 5892 [2020-07-21 02:20:07,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 318 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 02:20:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2020-07-21 02:20:08,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 3023. [2020-07-21 02:20:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3023 states. [2020-07-21 02:20:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3023 states to 3023 states and 4689 transitions. [2020-07-21 02:20:08,151 INFO L78 Accepts]: Start accepts. Automaton has 3023 states and 4689 transitions. Word has length 320 [2020-07-21 02:20:08,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:08,152 INFO L479 AbstractCegarLoop]: Abstraction has 3023 states and 4689 transitions. [2020-07-21 02:20:08,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:08,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3023 states and 4689 transitions. [2020-07-21 02:20:08,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-07-21 02:20:08,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:08,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:08,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:08,377 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:08,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:08,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1234625421, now seen corresponding path program 1 times [2020-07-21 02:20:08,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:08,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843798698] [2020-07-21 02:20:08,380 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 02:20:08,667 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:08,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:08,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:08,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:08,742 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 02:20:08,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:08,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843798698] [2020-07-21 02:20:08,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:08,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:08,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056291873] [2020-07-21 02:20:08,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:08,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:08,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:08,745 INFO L87 Difference]: Start difference. First operand 3023 states and 4689 transitions. Second operand 3 states. [2020-07-21 02:20:09,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:09,029 INFO L93 Difference]: Finished difference Result 8974 states and 13913 transitions. [2020-07-21 02:20:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:09,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 321 [2020-07-21 02:20:09,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:09,056 INFO L225 Difference]: With dead ends: 8974 [2020-07-21 02:20:09,056 INFO L226 Difference]: Without dead ends: 6001 [2020-07-21 02:20:09,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 319 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 02:20:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6001 states. [2020-07-21 02:20:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6001 to 3039. [2020-07-21 02:20:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3039 states. [2020-07-21 02:20:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 4708 transitions. [2020-07-21 02:20:09,226 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 4708 transitions. Word has length 321 [2020-07-21 02:20:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:09,226 INFO L479 AbstractCegarLoop]: Abstraction has 3039 states and 4708 transitions. [2020-07-21 02:20:09,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 4708 transitions. [2020-07-21 02:20:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 02:20:09,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:09,237 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] [2020-07-21 02:20:09,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:09,450 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:09,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:09,451 INFO L82 PathProgramCache]: Analyzing trace with hash -59269047, now seen corresponding path program 1 times [2020-07-21 02:20:09,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:09,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995459276] [2020-07-21 02:20:09,452 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 02:20:09,687 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:09,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:09,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:20:09,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:09,766 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 02:20:09,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:09,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995459276] [2020-07-21 02:20:09,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:09,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:20:09,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295526875] [2020-07-21 02:20:09,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:20:09,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:09,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:20:09,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:20:09,769 INFO L87 Difference]: Start difference. First operand 3039 states and 4708 transitions. Second operand 4 states. [2020-07-21 02:20:10,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:10,064 INFO L93 Difference]: Finished difference Result 6716 states and 10439 transitions. [2020-07-21 02:20:10,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:20:10,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-07-21 02:20:10,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:10,081 INFO L225 Difference]: With dead ends: 6716 [2020-07-21 02:20:10,082 INFO L226 Difference]: Without dead ends: 3403 [2020-07-21 02:20:10,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 319 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 02:20:10,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2020-07-21 02:20:10,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 3401. [2020-07-21 02:20:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3401 states. [2020-07-21 02:20:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 5257 transitions. [2020-07-21 02:20:10,224 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 5257 transitions. Word has length 322 [2020-07-21 02:20:10,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:10,225 INFO L479 AbstractCegarLoop]: Abstraction has 3401 states and 5257 transitions. [2020-07-21 02:20:10,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:20:10,225 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 5257 transitions. [2020-07-21 02:20:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 02:20:10,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:10,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:10,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:10,451 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:10,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:10,451 INFO L82 PathProgramCache]: Analyzing trace with hash -101962593, now seen corresponding path program 1 times [2020-07-21 02:20:10,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:10,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948239330] [2020-07-21 02:20:10,452 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 02:20:10,746 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:10,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:10,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 1494 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:10,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:10,895 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 02:20:10,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:10,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948239330] [2020-07-21 02:20:10,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:10,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:10,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045644752] [2020-07-21 02:20:10,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:10,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:10,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:10,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:10,909 INFO L87 Difference]: Start difference. First operand 3401 states and 5257 transitions. Second operand 3 states. [2020-07-21 02:20:11,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:11,217 INFO L93 Difference]: Finished difference Result 9848 states and 15188 transitions. [2020-07-21 02:20:11,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:11,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-21 02:20:11,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:11,249 INFO L225 Difference]: With dead ends: 9848 [2020-07-21 02:20:11,249 INFO L226 Difference]: Without dead ends: 6675 [2020-07-21 02:20:11,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 322 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 02:20:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6675 states. [2020-07-21 02:20:11,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6675 to 6673. [2020-07-21 02:20:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6673 states. [2020-07-21 02:20:11,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6673 states to 6673 states and 10260 transitions. [2020-07-21 02:20:11,541 INFO L78 Accepts]: Start accepts. Automaton has 6673 states and 10260 transitions. Word has length 324 [2020-07-21 02:20:11,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:11,542 INFO L479 AbstractCegarLoop]: Abstraction has 6673 states and 10260 transitions. [2020-07-21 02:20:11,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:11,543 INFO L276 IsEmpty]: Start isEmpty. Operand 6673 states and 10260 transitions. [2020-07-21 02:20:11,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 02:20:11,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:11,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:11,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:11,775 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:11,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:11,775 INFO L82 PathProgramCache]: Analyzing trace with hash 205468386, now seen corresponding path program 1 times [2020-07-21 02:20:11,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:11,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205725908] [2020-07-21 02:20:11,776 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 02:20:12,037 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:12,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:12,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:20:12,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:12,181 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 02:20:12,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:12,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205725908] [2020-07-21 02:20:12,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:12,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:20:12,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447191153] [2020-07-21 02:20:12,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:20:12,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:12,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:20:12,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:20:12,184 INFO L87 Difference]: Start difference. First operand 6673 states and 10260 transitions. Second operand 4 states. [2020-07-21 02:20:12,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:12,673 INFO L93 Difference]: Finished difference Result 18787 states and 28697 transitions. [2020-07-21 02:20:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:20:12,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-21 02:20:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:12,704 INFO L225 Difference]: With dead ends: 18787 [2020-07-21 02:20:12,704 INFO L226 Difference]: Without dead ends: 12899 [2020-07-21 02:20:12,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 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 02:20:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12899 states. [2020-07-21 02:20:13,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12899 to 7248. [2020-07-21 02:20:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7248 states. [2020-07-21 02:20:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7248 states to 7248 states and 11229 transitions. [2020-07-21 02:20:13,167 INFO L78 Accepts]: Start accepts. Automaton has 7248 states and 11229 transitions. Word has length 324 [2020-07-21 02:20:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:13,168 INFO L479 AbstractCegarLoop]: Abstraction has 7248 states and 11229 transitions. [2020-07-21 02:20:13,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:20:13,168 INFO L276 IsEmpty]: Start isEmpty. Operand 7248 states and 11229 transitions. [2020-07-21 02:20:13,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 02:20:13,189 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:13,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:13,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:13,405 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:13,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:13,406 INFO L82 PathProgramCache]: Analyzing trace with hash 648081066, now seen corresponding path program 1 times [2020-07-21 02:20:13,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:13,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189550289] [2020-07-21 02:20:13,407 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 02:20:13,709 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:13,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:13,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1498 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 02:20:13,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:13,930 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 02:20:13,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:13,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189550289] [2020-07-21 02:20:13,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:13,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 02:20:13,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772932628] [2020-07-21 02:20:13,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 02:20:13,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:13,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 02:20:13,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 02:20:13,933 INFO L87 Difference]: Start difference. First operand 7248 states and 11229 transitions. Second operand 8 states. [2020-07-21 02:20:15,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:15,901 INFO L93 Difference]: Finished difference Result 16034 states and 24685 transitions. [2020-07-21 02:20:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 02:20:15,902 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 324 [2020-07-21 02:20:15,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:15,931 INFO L225 Difference]: With dead ends: 16034 [2020-07-21 02:20:15,931 INFO L226 Difference]: Without dead ends: 11824 [2020-07-21 02:20:15,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 02:20:15,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11824 states. [2020-07-21 02:20:16,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11824 to 9438. [2020-07-21 02:20:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9438 states. [2020-07-21 02:20:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9438 states to 9438 states and 14451 transitions. [2020-07-21 02:20:16,511 INFO L78 Accepts]: Start accepts. Automaton has 9438 states and 14451 transitions. Word has length 324 [2020-07-21 02:20:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:16,512 INFO L479 AbstractCegarLoop]: Abstraction has 9438 states and 14451 transitions. [2020-07-21 02:20:16,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 02:20:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 9438 states and 14451 transitions. [2020-07-21 02:20:16,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 02:20:16,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:16,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:16,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:16,744 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:16,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:16,744 INFO L82 PathProgramCache]: Analyzing trace with hash -568038990, now seen corresponding path program 1 times [2020-07-21 02:20:16,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:16,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678253804] [2020-07-21 02:20:16,745 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 02:20:17,027 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:17,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:17,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1494 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:17,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:17,100 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 02:20:17,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:17,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678253804] [2020-07-21 02:20:17,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:17,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:17,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676314444] [2020-07-21 02:20:17,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:17,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:17,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:17,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:17,103 INFO L87 Difference]: Start difference. First operand 9438 states and 14451 transitions. Second operand 3 states. [2020-07-21 02:20:17,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:17,622 INFO L93 Difference]: Finished difference Result 18244 states and 27777 transitions. [2020-07-21 02:20:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:17,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-21 02:20:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:17,648 INFO L225 Difference]: With dead ends: 18244 [2020-07-21 02:20:17,649 INFO L226 Difference]: Without dead ends: 11486 [2020-07-21 02:20:17,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 322 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 02:20:17,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11486 states. [2020-07-21 02:20:18,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11486 to 10132. [2020-07-21 02:20:18,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10132 states. [2020-07-21 02:20:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10132 states to 10132 states and 15593 transitions. [2020-07-21 02:20:18,154 INFO L78 Accepts]: Start accepts. Automaton has 10132 states and 15593 transitions. Word has length 324 [2020-07-21 02:20:18,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:18,154 INFO L479 AbstractCegarLoop]: Abstraction has 10132 states and 15593 transitions. [2020-07-21 02:20:18,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:18,154 INFO L276 IsEmpty]: Start isEmpty. Operand 10132 states and 15593 transitions. [2020-07-21 02:20:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 02:20:18,168 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:18,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:18,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:18,457 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:18,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:18,458 INFO L82 PathProgramCache]: Analyzing trace with hash 728805205, now seen corresponding path program 1 times [2020-07-21 02:20:18,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:18,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125503572] [2020-07-21 02:20:18,459 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 02:20:18,704 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:18,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:18,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:18,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:18,779 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 02:20:18,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:18,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125503572] [2020-07-21 02:20:18,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:18,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:18,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105006359] [2020-07-21 02:20:18,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:18,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:18,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:18,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:18,782 INFO L87 Difference]: Start difference. First operand 10132 states and 15593 transitions. Second operand 3 states. [2020-07-21 02:20:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:19,477 INFO L93 Difference]: Finished difference Result 29825 states and 45855 transitions. [2020-07-21 02:20:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:19,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-21 02:20:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:19,513 INFO L225 Difference]: With dead ends: 29825 [2020-07-21 02:20:19,513 INFO L226 Difference]: Without dead ends: 20009 [2020-07-21 02:20:19,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 322 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 02:20:19,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20009 states. [2020-07-21 02:20:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20009 to 10229. [2020-07-21 02:20:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10229 states. [2020-07-21 02:20:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10229 states to 10229 states and 15718 transitions. [2020-07-21 02:20:20,014 INFO L78 Accepts]: Start accepts. Automaton has 10229 states and 15718 transitions. Word has length 324 [2020-07-21 02:20:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:20,014 INFO L479 AbstractCegarLoop]: Abstraction has 10229 states and 15718 transitions. [2020-07-21 02:20:20,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 10229 states and 15718 transitions. [2020-07-21 02:20:20,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-07-21 02:20:20,025 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:20,025 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] [2020-07-21 02:20:20,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:20,240 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:20,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:20,241 INFO L82 PathProgramCache]: Analyzing trace with hash 966367979, now seen corresponding path program 1 times [2020-07-21 02:20:20,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:20,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161792632] [2020-07-21 02:20:20,242 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 02:20:20,467 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:20,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:20,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:20,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:20,602 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 02:20:20,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:20,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161792632] [2020-07-21 02:20:20,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:20,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:20,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740383362] [2020-07-21 02:20:20,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:20,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:20,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:20,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:20,605 INFO L87 Difference]: Start difference. First operand 10229 states and 15718 transitions. Second operand 3 states. [2020-07-21 02:20:21,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:21,251 INFO L93 Difference]: Finished difference Result 29882 states and 45903 transitions. [2020-07-21 02:20:21,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:21,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 325 [2020-07-21 02:20:21,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:21,290 INFO L225 Difference]: With dead ends: 29882 [2020-07-21 02:20:21,291 INFO L226 Difference]: Without dead ends: 20082 [2020-07-21 02:20:21,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 323 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 02:20:21,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20082 states. [2020-07-21 02:20:22,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20082 to 10330. [2020-07-21 02:20:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10330 states. [2020-07-21 02:20:22,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10330 states to 10330 states and 15833 transitions. [2020-07-21 02:20:22,032 INFO L78 Accepts]: Start accepts. Automaton has 10330 states and 15833 transitions. Word has length 325 [2020-07-21 02:20:22,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:22,033 INFO L479 AbstractCegarLoop]: Abstraction has 10330 states and 15833 transitions. [2020-07-21 02:20:22,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:22,033 INFO L276 IsEmpty]: Start isEmpty. Operand 10330 states and 15833 transitions. [2020-07-21 02:20:22,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 02:20:22,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:22,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:22,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:22,252 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:22,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1708123985, now seen corresponding path program 1 times [2020-07-21 02:20:22,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:22,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635120982] [2020-07-21 02:20:22,254 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 02:20:22,486 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:22,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:22,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:20:22,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:22,553 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 02:20:22,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:22,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635120982] [2020-07-21 02:20:22,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:22,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:20:22,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467080021] [2020-07-21 02:20:22,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:20:22,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:22,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:20:22,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:20:22,555 INFO L87 Difference]: Start difference. First operand 10330 states and 15833 transitions. Second operand 4 states. [2020-07-21 02:20:23,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:23,166 INFO L93 Difference]: Finished difference Result 22321 states and 34141 transitions. [2020-07-21 02:20:23,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:20:23,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-21 02:20:23,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:23,189 INFO L225 Difference]: With dead ends: 22321 [2020-07-21 02:20:23,189 INFO L226 Difference]: Without dead ends: 11769 [2020-07-21 02:20:23,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 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 02:20:23,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11769 states. [2020-07-21 02:20:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11769 to 11767. [2020-07-21 02:20:23,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11767 states. [2020-07-21 02:20:23,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11767 states to 11767 states and 17894 transitions. [2020-07-21 02:20:23,767 INFO L78 Accepts]: Start accepts. Automaton has 11767 states and 17894 transitions. Word has length 326 [2020-07-21 02:20:23,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:23,767 INFO L479 AbstractCegarLoop]: Abstraction has 11767 states and 17894 transitions. [2020-07-21 02:20:23,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:20:23,767 INFO L276 IsEmpty]: Start isEmpty. Operand 11767 states and 17894 transitions. [2020-07-21 02:20:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 02:20:23,779 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:23,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:23,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:23,980 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:23,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:23,981 INFO L82 PathProgramCache]: Analyzing trace with hash 936022759, now seen corresponding path program 1 times [2020-07-21 02:20:23,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:23,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752840153] [2020-07-21 02:20:23,982 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 02:20:24,230 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:24,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:24,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:24,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:24,308 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 02:20:24,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:24,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752840153] [2020-07-21 02:20:24,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:24,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:24,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479023218] [2020-07-21 02:20:24,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:24,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:24,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:24,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:24,314 INFO L87 Difference]: Start difference. First operand 11767 states and 17894 transitions. Second operand 3 states. [2020-07-21 02:20:25,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:25,120 INFO L93 Difference]: Finished difference Result 32269 states and 48896 transitions. [2020-07-21 02:20:25,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:25,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 02:20:25,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:25,148 INFO L225 Difference]: With dead ends: 32269 [2020-07-21 02:20:25,148 INFO L226 Difference]: Without dead ends: 20902 [2020-07-21 02:20:25,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 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 02:20:25,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20902 states. [2020-07-21 02:20:25,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20902 to 11337. [2020-07-21 02:20:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11337 states. [2020-07-21 02:20:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11337 states to 11337 states and 17216 transitions. [2020-07-21 02:20:25,840 INFO L78 Accepts]: Start accepts. Automaton has 11337 states and 17216 transitions. Word has length 326 [2020-07-21 02:20:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:25,841 INFO L479 AbstractCegarLoop]: Abstraction has 11337 states and 17216 transitions. [2020-07-21 02:20:25,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:25,841 INFO L276 IsEmpty]: Start isEmpty. Operand 11337 states and 17216 transitions. [2020-07-21 02:20:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 02:20:25,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:25,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:26,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:26,059 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:26,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1745669268, now seen corresponding path program 1 times [2020-07-21 02:20:26,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:26,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227502230] [2020-07-21 02:20:26,061 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 02:20:26,298 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:26,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:26,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:20:26,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:26,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:26,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227502230] [2020-07-21 02:20:26,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:26,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:20:26,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953205469] [2020-07-21 02:20:26,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:20:26,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:26,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:20:26,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:20:26,376 INFO L87 Difference]: Start difference. First operand 11337 states and 17216 transitions. Second operand 4 states. [2020-07-21 02:20:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:27,927 INFO L93 Difference]: Finished difference Result 31669 states and 47873 transitions. [2020-07-21 02:20:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:20:27,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-21 02:20:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:27,949 INFO L225 Difference]: With dead ends: 31669 [2020-07-21 02:20:27,949 INFO L226 Difference]: Without dead ends: 21820 [2020-07-21 02:20:27,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 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 02:20:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21820 states. [2020-07-21 02:20:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21820 to 12444. [2020-07-21 02:20:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12444 states. [2020-07-21 02:20:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12444 states to 12444 states and 18925 transitions. [2020-07-21 02:20:28,569 INFO L78 Accepts]: Start accepts. Automaton has 12444 states and 18925 transitions. Word has length 326 [2020-07-21 02:20:28,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:28,569 INFO L479 AbstractCegarLoop]: Abstraction has 12444 states and 18925 transitions. [2020-07-21 02:20:28,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:20:28,569 INFO L276 IsEmpty]: Start isEmpty. Operand 12444 states and 18925 transitions. [2020-07-21 02:20:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 02:20:28,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:28,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:28,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:28,779 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:28,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:28,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1151235582, now seen corresponding path program 1 times [2020-07-21 02:20:28,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:28,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931290187] [2020-07-21 02:20:28,781 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 02:20:29,068 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:29,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:29,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:29,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:29,133 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 02:20:29,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:29,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931290187] [2020-07-21 02:20:29,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:29,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:29,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935614652] [2020-07-21 02:20:29,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:29,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:29,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:29,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:29,135 INFO L87 Difference]: Start difference. First operand 12444 states and 18925 transitions. Second operand 3 states. [2020-07-21 02:20:29,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:29,996 INFO L93 Difference]: Finished difference Result 24400 states and 37143 transitions. [2020-07-21 02:20:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:29,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 02:20:29,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:30,015 INFO L225 Difference]: With dead ends: 24400 [2020-07-21 02:20:30,015 INFO L226 Difference]: Without dead ends: 17006 [2020-07-21 02:20:30,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 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 02:20:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17006 states. [2020-07-21 02:20:30,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17006 to 15004. [2020-07-21 02:20:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15004 states. [2020-07-21 02:20:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15004 states to 15004 states and 22953 transitions. [2020-07-21 02:20:30,901 INFO L78 Accepts]: Start accepts. Automaton has 15004 states and 22953 transitions. Word has length 326 [2020-07-21 02:20:30,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:30,901 INFO L479 AbstractCegarLoop]: Abstraction has 15004 states and 22953 transitions. [2020-07-21 02:20:30,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 15004 states and 22953 transitions. [2020-07-21 02:20:30,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 02:20:30,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:30,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:31,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:31,111 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:31,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:31,112 INFO L82 PathProgramCache]: Analyzing trace with hash -267651829, now seen corresponding path program 1 times [2020-07-21 02:20:31,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:31,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847626025] [2020-07-21 02:20:31,113 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 02:20:31,399 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:31,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:31,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:31,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:31,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:31,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847626025] [2020-07-21 02:20:31,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:31,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:31,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304077136] [2020-07-21 02:20:31,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:31,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:31,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:31,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:31,524 INFO L87 Difference]: Start difference. First operand 15004 states and 22953 transitions. Second operand 3 states. [2020-07-21 02:20:33,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:33,539 INFO L93 Difference]: Finished difference Result 40331 states and 61413 transitions. [2020-07-21 02:20:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:33,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 02:20:33,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:33,564 INFO L225 Difference]: With dead ends: 40331 [2020-07-21 02:20:33,564 INFO L226 Difference]: Without dead ends: 27849 [2020-07-21 02:20:33,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 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 02:20:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27849 states. [2020-07-21 02:20:34,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27849 to 27847. [2020-07-21 02:20:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27847 states. [2020-07-21 02:20:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27847 states to 27847 states and 42261 transitions. [2020-07-21 02:20:34,984 INFO L78 Accepts]: Start accepts. Automaton has 27847 states and 42261 transitions. Word has length 326 [2020-07-21 02:20:34,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:34,985 INFO L479 AbstractCegarLoop]: Abstraction has 27847 states and 42261 transitions. [2020-07-21 02:20:34,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand 27847 states and 42261 transitions. [2020-07-21 02:20:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 02:20:35,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:35,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:35,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:35,214 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:35,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:35,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2139894551, now seen corresponding path program 1 times [2020-07-21 02:20:35,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:35,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856289666] [2020-07-21 02:20:35,216 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 02:20:35,512 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:35,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:35,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:20:35,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:35,620 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 02:20:35,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:35,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856289666] [2020-07-21 02:20:35,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:35,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:20:35,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231929429] [2020-07-21 02:20:35,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:20:35,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:35,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:20:35,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:20:35,634 INFO L87 Difference]: Start difference. First operand 27847 states and 42261 transitions. Second operand 4 states. [2020-07-21 02:20:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:38,283 INFO L93 Difference]: Finished difference Result 77630 states and 117458 transitions. [2020-07-21 02:20:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:20:38,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-07-21 02:20:38,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:38,337 INFO L225 Difference]: With dead ends: 77630 [2020-07-21 02:20:38,337 INFO L226 Difference]: Without dead ends: 52598 [2020-07-21 02:20:38,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 324 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 02:20:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52598 states. [2020-07-21 02:20:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52598 to 52596. [2020-07-21 02:20:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52596 states. [2020-07-21 02:20:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52596 states to 52596 states and 79247 transitions. [2020-07-21 02:20:41,985 INFO L78 Accepts]: Start accepts. Automaton has 52596 states and 79247 transitions. Word has length 327 [2020-07-21 02:20:41,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:41,986 INFO L479 AbstractCegarLoop]: Abstraction has 52596 states and 79247 transitions. [2020-07-21 02:20:41,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:20:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 52596 states and 79247 transitions. [2020-07-21 02:20:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 02:20:42,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:42,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:42,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:42,230 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:42,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:42,231 INFO L82 PathProgramCache]: Analyzing trace with hash 770870562, now seen corresponding path program 1 times [2020-07-21 02:20:42,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:42,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614947844] [2020-07-21 02:20:42,232 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 02:20:42,467 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:42,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:42,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:42,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:42,542 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 02:20:42,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:42,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614947844] [2020-07-21 02:20:42,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:42,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:42,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401109134] [2020-07-21 02:20:42,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:42,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:42,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:42,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:42,545 INFO L87 Difference]: Start difference. First operand 52596 states and 79247 transitions. Second operand 3 states. [2020-07-21 02:20:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:48,786 INFO L93 Difference]: Finished difference Result 146084 states and 219322 transitions. [2020-07-21 02:20:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:48,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 02:20:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:48,882 INFO L225 Difference]: With dead ends: 146084 [2020-07-21 02:20:48,882 INFO L226 Difference]: Without dead ends: 98730 [2020-07-21 02:20:48,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 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 02:20:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98730 states. [2020-07-21 02:20:52,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98730 to 53248. [2020-07-21 02:20:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53248 states. [2020-07-21 02:20:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53248 states to 53248 states and 79958 transitions. [2020-07-21 02:20:52,112 INFO L78 Accepts]: Start accepts. Automaton has 53248 states and 79958 transitions. Word has length 328 [2020-07-21 02:20:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:52,113 INFO L479 AbstractCegarLoop]: Abstraction has 53248 states and 79958 transitions. [2020-07-21 02:20:52,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 53248 states and 79958 transitions. [2020-07-21 02:20:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-21 02:20:52,138 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:52,138 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] [2020-07-21 02:20:52,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:52,339 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:52,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:52,340 INFO L82 PathProgramCache]: Analyzing trace with hash 423829686, now seen corresponding path program 1 times [2020-07-21 02:20:52,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:52,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078416537] [2020-07-21 02:20:52,341 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 02:20:52,623 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:52,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:52,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 1505 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:52,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:52,744 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 02:20:52,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:52,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078416537] [2020-07-21 02:20:52,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:52,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:52,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317981709] [2020-07-21 02:20:52,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:52,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:52,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:52,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:52,748 INFO L87 Difference]: Start difference. First operand 53248 states and 79958 transitions. Second operand 3 states. [2020-07-21 02:20:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:59,344 INFO L93 Difference]: Finished difference Result 143535 states and 214774 transitions. [2020-07-21 02:20:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:59,345 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-07-21 02:20:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:59,453 INFO L225 Difference]: With dead ends: 143535 [2020-07-21 02:20:59,453 INFO L226 Difference]: Without dead ends: 98828 [2020-07-21 02:20:59,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 327 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 02:20:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98828 states. [2020-07-21 02:21:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98828 to 98826. [2020-07-21 02:21:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98826 states. [2020-07-21 02:21:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98826 states to 98826 states and 147302 transitions. [2020-07-21 02:21:05,230 INFO L78 Accepts]: Start accepts. Automaton has 98826 states and 147302 transitions. Word has length 329 [2020-07-21 02:21:05,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:05,231 INFO L479 AbstractCegarLoop]: Abstraction has 98826 states and 147302 transitions. [2020-07-21 02:21:05,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:21:05,231 INFO L276 IsEmpty]: Start isEmpty. Operand 98826 states and 147302 transitions. [2020-07-21 02:21:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 02:21:05,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:05,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:21:05,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:05,480 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:05,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:05,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1401935298, now seen corresponding path program 1 times [2020-07-21 02:21:05,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:05,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251121580] [2020-07-21 02:21:05,482 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 02:21:06,016 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:21:06,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:06,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:21:06,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:06,082 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 02:21:06,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:06,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251121580] [2020-07-21 02:21:06,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:06,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:21:06,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445237305] [2020-07-21 02:21:06,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:21:06,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:06,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:21:06,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:21:06,084 INFO L87 Difference]: Start difference. First operand 98826 states and 147302 transitions. Second operand 4 states. [2020-07-21 02:21:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:18,250 INFO L93 Difference]: Finished difference Result 284248 states and 423806 transitions. [2020-07-21 02:21:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:21:18,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 02:21:18,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:18,439 INFO L225 Difference]: With dead ends: 284248 [2020-07-21 02:21:18,439 INFO L226 Difference]: Without dead ends: 193847 [2020-07-21 02:21:18,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 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 02:21:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193847 states. [2020-07-21 02:21:25,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193847 to 103185. [2020-07-21 02:21:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103185 states. [2020-07-21 02:21:25,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103185 states to 103185 states and 154086 transitions. [2020-07-21 02:21:25,597 INFO L78 Accepts]: Start accepts. Automaton has 103185 states and 154086 transitions. Word has length 330 [2020-07-21 02:21:25,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:25,597 INFO L479 AbstractCegarLoop]: Abstraction has 103185 states and 154086 transitions. [2020-07-21 02:21:25,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:21:25,597 INFO L276 IsEmpty]: Start isEmpty. Operand 103185 states and 154086 transitions. [2020-07-21 02:21:25,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 02:21:25,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:25,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:21:25,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:25,849 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:25,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:25,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1588878512, now seen corresponding path program 1 times [2020-07-21 02:21:25,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:25,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097079930] [2020-07-21 02:21:25,850 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 02:21:26,136 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:21:26,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:26,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1512 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:21:26,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:26,224 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 02:21:26,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:26,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097079930] [2020-07-21 02:21:26,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:26,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:21:26,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992334013] [2020-07-21 02:21:26,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:21:26,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:26,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:21:26,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:21:26,226 INFO L87 Difference]: Start difference. First operand 103185 states and 154086 transitions. Second operand 4 states. [2020-07-21 02:21:40,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:40,212 INFO L93 Difference]: Finished difference Result 300606 states and 448707 transitions. [2020-07-21 02:21:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:21:40,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 02:21:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:40,440 INFO L225 Difference]: With dead ends: 300606 [2020-07-21 02:21:40,441 INFO L226 Difference]: Without dead ends: 198976 [2020-07-21 02:21:40,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 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 02:21:40,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198976 states. [2020-07-21 02:21:57,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198976 to 198826. [2020-07-21 02:21:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198826 states. [2020-07-21 02:21:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198826 states to 198826 states and 294593 transitions. [2020-07-21 02:21:57,665 INFO L78 Accepts]: Start accepts. Automaton has 198826 states and 294593 transitions. Word has length 330 [2020-07-21 02:21:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:57,665 INFO L479 AbstractCegarLoop]: Abstraction has 198826 states and 294593 transitions. [2020-07-21 02:21:57,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:21:57,665 INFO L276 IsEmpty]: Start isEmpty. Operand 198826 states and 294593 transitions. [2020-07-21 02:21:57,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:21:57,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:57,765 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] [2020-07-21 02:21:57,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:57,966 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:57,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:57,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1969020588, now seen corresponding path program 1 times [2020-07-21 02:21:57,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:57,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403396615] [2020-07-21 02:21:57,968 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 02:21:58,209 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:21:58,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:58,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:21:58,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:58,284 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 02:21:58,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:58,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403396615] [2020-07-21 02:21:58,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:58,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:21:58,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714908611] [2020-07-21 02:21:58,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:21:58,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:58,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:21:58,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:21:58,286 INFO L87 Difference]: Start difference. First operand 198826 states and 294593 transitions. Second operand 4 states. [2020-07-21 02:22:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:22:25,858 INFO L93 Difference]: Finished difference Result 566554 states and 838337 transitions. [2020-07-21 02:22:25,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:22:25,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 02:22:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:22:26,750 INFO L225 Difference]: With dead ends: 566554 [2020-07-21 02:22:26,750 INFO L226 Difference]: Without dead ends: 373262 [2020-07-21 02:22:26,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 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 02:22:27,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373262 states. [2020-07-21 02:23:01,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373262 to 373196. [2020-07-21 02:23:01,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373196 states. [2020-07-21 02:23:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373196 states to 373196 states and 549063 transitions. [2020-07-21 02:23:02,562 INFO L78 Accepts]: Start accepts. Automaton has 373196 states and 549063 transitions. Word has length 332 [2020-07-21 02:23:02,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:02,562 INFO L479 AbstractCegarLoop]: Abstraction has 373196 states and 549063 transitions. [2020-07-21 02:23:02,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:23:02,562 INFO L276 IsEmpty]: Start isEmpty. Operand 373196 states and 549063 transitions. [2020-07-21 02:23:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 02:23:03,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:03,595 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] [2020-07-21 02:23:03,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:03,797 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:03,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:03,798 INFO L82 PathProgramCache]: Analyzing trace with hash -134813653, now seen corresponding path program 1 times [2020-07-21 02:23:03,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:03,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359317737] [2020-07-21 02:23:03,799 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:04,046 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:04,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:04,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:04,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:04,109 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 02:23:04,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:04,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359317737] [2020-07-21 02:23:04,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:04,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:04,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681989329] [2020-07-21 02:23:04,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:04,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:04,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:04,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:04,111 INFO L87 Difference]: Start difference. First operand 373196 states and 549063 transitions. Second operand 3 states. [2020-07-21 02:23:47,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:47,375 INFO L93 Difference]: Finished difference Result 701373 states and 1031272 transitions. [2020-07-21 02:23:47,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:47,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 02:23:47,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:48,019 INFO L225 Difference]: With dead ends: 701373 [2020-07-21 02:23:48,020 INFO L226 Difference]: Without dead ends: 531194 [2020-07-21 02:23:48,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 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 02:23:48,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531194 states. [2020-07-21 02:24:25,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531194 to 373130. [2020-07-21 02:24:25,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373130 states. [2020-07-21 02:24:25,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373130 states to 373130 states and 548795 transitions. [2020-07-21 02:24:25,974 INFO L78 Accepts]: Start accepts. Automaton has 373130 states and 548795 transitions. Word has length 333 [2020-07-21 02:24:25,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:25,975 INFO L479 AbstractCegarLoop]: Abstraction has 373130 states and 548795 transitions. [2020-07-21 02:24:25,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:25,975 INFO L276 IsEmpty]: Start isEmpty. Operand 373130 states and 548795 transitions. [2020-07-21 02:24:26,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 02:24:26,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:26,195 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] [2020-07-21 02:24:26,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:26,976 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:26,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:26,977 INFO L82 PathProgramCache]: Analyzing trace with hash -387091266, now seen corresponding path program 1 times [2020-07-21 02:24:26,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:26,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456818920] [2020-07-21 02:24:26,977 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:27,219 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:27,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:27,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:27,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:27,274 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 02:24:27,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:27,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456818920] [2020-07-21 02:24:27,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:27,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:27,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274646567] [2020-07-21 02:24:27,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:27,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:27,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:27,276 INFO L87 Difference]: Start difference. First operand 373130 states and 548795 transitions. Second operand 3 states. [2020-07-21 02:25:32,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:25:32,483 INFO L93 Difference]: Finished difference Result 1077563 states and 1582893 transitions. [2020-07-21 02:25:32,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:25:32,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 02:25:32,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:25:33,751 INFO L225 Difference]: With dead ends: 1077563 [2020-07-21 02:25:33,751 INFO L226 Difference]: Without dead ends: 731418 [2020-07-21 02:25:34,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 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 02:25:34,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731418 states. [2020-07-21 02:26:14,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731418 to 376168. [2020-07-21 02:26:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376168 states. [2020-07-21 02:26:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376168 states to 376168 states and 552668 transitions. [2020-07-21 02:26:15,293 INFO L78 Accepts]: Start accepts. Automaton has 376168 states and 552668 transitions. Word has length 334 [2020-07-21 02:26:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:26:15,293 INFO L479 AbstractCegarLoop]: Abstraction has 376168 states and 552668 transitions. [2020-07-21 02:26:15,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:26:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 376168 states and 552668 transitions. [2020-07-21 02:26:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 02:26:15,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:26:15,500 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] [2020-07-21 02:26:15,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:26:15,701 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:26:15,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:26:15,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1966909775, now seen corresponding path program 1 times [2020-07-21 02:26:15,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:26:15,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372932098] [2020-07-21 02:26:15,703 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:26:15,975 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:26:15,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:26:15,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 1466 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:26:15,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:26:16,056 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 02:26:16,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:26:16,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372932098] [2020-07-21 02:26:16,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:26:16,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:26:16,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008486238] [2020-07-21 02:26:16,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:26:16,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:26:16,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:26:16,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:26:16,058 INFO L87 Difference]: Start difference. First operand 376168 states and 552668 transitions. Second operand 3 states. [2020-07-21 02:27:19,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:19,175 INFO L93 Difference]: Finished difference Result 1065570 states and 1564235 transitions. [2020-07-21 02:27:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:19,175 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 02:27:19,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:20,074 INFO L225 Difference]: With dead ends: 1065570 [2020-07-21 02:27:20,074 INFO L226 Difference]: Without dead ends: 720752 [2020-07-21 02:27:20,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 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 02:27:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720752 states. [2020-07-21 02:28:37,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720752 to 720750. [2020-07-21 02:28:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720750 states. [2020-07-21 02:28:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720750 states to 720750 states and 1053174 transitions. [2020-07-21 02:28:39,020 INFO L78 Accepts]: Start accepts. Automaton has 720750 states and 1053174 transitions. Word has length 334 [2020-07-21 02:28:39,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:39,021 INFO L479 AbstractCegarLoop]: Abstraction has 720750 states and 1053174 transitions. [2020-07-21 02:28:39,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 720750 states and 1053174 transitions. [2020-07-21 02:28:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 02:28:39,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:39,429 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] [2020-07-21 02:28:39,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:39,631 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:39,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:39,631 INFO L82 PathProgramCache]: Analyzing trace with hash -47654804, now seen corresponding path program 1 times [2020-07-21 02:28:39,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:39,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430445561] [2020-07-21 02:28:39,632 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:39,852 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:39,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:39,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:28:39,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:39,929 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 02:28:39,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:39,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430445561] [2020-07-21 02:28:39,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:39,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:28:39,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868100155] [2020-07-21 02:28:39,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:28:39,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:39,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:28:39,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:28:39,931 INFO L87 Difference]: Start difference. First operand 720750 states and 1053174 transitions. Second operand 4 states. [2020-07-21 02:30:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:55,724 INFO L93 Difference]: Finished difference Result 2065798 states and 3015695 transitions. [2020-07-21 02:30:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:30:55,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 02:30:55,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:57,664 INFO L225 Difference]: With dead ends: 2065798 [2020-07-21 02:30:57,664 INFO L226 Difference]: Without dead ends: 1402016 [2020-07-21 02:30:58,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 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 02:30:59,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402016 states.