/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 DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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 21:04:53,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 21:04:53,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 21:04:53,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 21:04:53,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 21:04:53,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 21:04:53,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 21:04:53,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 21:04:53,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 21:04:53,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 21:04:53,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 21:04:53,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 21:04:53,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 21:04:53,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 21:04:53,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 21:04:53,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 21:04:53,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 21:04:53,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 21:04:53,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 21:04:53,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 21:04:53,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 21:04:53,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 21:04:53,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 21:04:53,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 21:04:53,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 21:04:53,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 21:04:53,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 21:04:53,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 21:04:53,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 21:04:53,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 21:04:53,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 21:04:53,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 21:04:53,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 21:04:53,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 21:04:53,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 21:04:53,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 21:04:53,561 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 21:04:53,575 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 21:04:53,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 21:04:53,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 21:04:53,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 21:04:53,577 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 21:04:53,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 21:04:53,578 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 21:04:53,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 21:04:53,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 21:04:53,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 21:04:53,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 21:04:53,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 21:04:53,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 21:04:53,579 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 21:04:53,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 21:04:53,579 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 21:04:53,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 21:04:53,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 21:04:53,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 21:04:53,580 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 21:04:53,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 21:04:53,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:04:53,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 21:04:53,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 21:04:53,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 21:04:53,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 21:04:53,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:04:53,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 21:04:53,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 21:04:53,582 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 -> DAGSIZE 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 -> 2 [2020-07-21 21:04:53,888 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 21:04:53,908 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 21:04:53,912 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 21:04:53,916 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 21:04:53,916 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 21:04:53,917 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 21:04:54,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bcc4c24b/f66d7d0143114105993ae117798d7896/FLAG4d7eba86e [2020-07-21 21:04:54,642 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 21:04:54,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 21:04:54,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bcc4c24b/f66d7d0143114105993ae117798d7896/FLAG4d7eba86e [2020-07-21 21:04:54,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bcc4c24b/f66d7d0143114105993ae117798d7896 [2020-07-21 21:04:54,841 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 21:04:54,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 21:04:54,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 21:04:54,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 21:04:54,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 21:04:54,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:04:54" (1/1) ... [2020-07-21 21:04:54,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@602d19a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:54, skipping insertion in model container [2020-07-21 21:04:54,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:04:54" (1/1) ... [2020-07-21 21:04:54,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 21:04:54,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 21:04:55,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:04:56,000 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 21:04:56,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:04:56,512 INFO L208 MainTranslator]: Completed translation [2020-07-21 21:04:56,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:56 WrapperNode [2020-07-21 21:04:56,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 21:04:56,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 21:04:56,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 21:04:56,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 21:04:56,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:56" (1/1) ... [2020-07-21 21:04:56,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:56" (1/1) ... [2020-07-21 21:04:56,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:56" (1/1) ... [2020-07-21 21:04:56,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:56" (1/1) ... [2020-07-21 21:04:56,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:56" (1/1) ... [2020-07-21 21:04:56,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:56" (1/1) ... [2020-07-21 21:04:56,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:56" (1/1) ... [2020-07-21 21:04:56,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 21:04:56,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 21:04:56,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 21:04:56,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 21:04:56,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:56" (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 21:04:56,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 21:04:56,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 21:04:56,805 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 21:04:56,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 21:04:56,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 21:04:56,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 21:04:56,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 21:04:56,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 21:04:56,807 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 21:04:56,808 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 21:04:56,809 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 21:04:56,809 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 21:04:56,809 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 21:04:56,809 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 21:04:56,809 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 21:04:56,810 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 21:04:56,811 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 21:04:56,811 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 21:04:56,811 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 21:04:56,812 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 21:04:56,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 21:04:56,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 21:04:59,578 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 21:04:59,578 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 21:04:59,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:04:59 BoogieIcfgContainer [2020-07-21 21:04:59,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 21:04:59,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 21:04:59,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 21:04:59,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 21:04:59,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:04:54" (1/3) ... [2020-07-21 21:04:59,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df50cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:04:59, skipping insertion in model container [2020-07-21 21:04:59,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:56" (2/3) ... [2020-07-21 21:04:59,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df50cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:04:59, skipping insertion in model container [2020-07-21 21:04:59,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:04:59" (3/3) ... [2020-07-21 21:04:59,608 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 21:04:59,618 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 21:04:59,625 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 21:04:59,637 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 21:04:59,663 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 21:04:59,663 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 21:04:59,663 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 21:04:59,663 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 21:04:59,663 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 21:04:59,664 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 21:04:59,664 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 21:04:59,664 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 21:04:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-07-21 21:04:59,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-21 21:04:59,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:04:59,729 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 21:04:59,729 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:04:59,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:04:59,735 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-07-21 21:04:59,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:04:59,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908178537] [2020-07-21 21:04:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:05:00,152 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:00,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:00,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:00,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:00,490 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 21:05:00,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:00,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908178537] [2020-07-21 21:05:00,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:00,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:00,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268464682] [2020-07-21 21:05:00,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:00,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:00,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:00,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:00,516 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 3 states. [2020-07-21 21:05:00,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:00,851 INFO L93 Difference]: Finished difference Result 1140 states and 1981 transitions. [2020-07-21 21:05:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:00,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-21 21:05:00,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:00,877 INFO L225 Difference]: With dead ends: 1140 [2020-07-21 21:05:00,877 INFO L226 Difference]: Without dead ends: 973 [2020-07-21 21:05:00,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 21:05:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2020-07-21 21:05:01,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 971. [2020-07-21 21:05:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 971 states. [2020-07-21 21:05:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1536 transitions. [2020-07-21 21:05:01,023 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1536 transitions. Word has length 318 [2020-07-21 21:05:01,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:01,028 INFO L479 AbstractCegarLoop]: Abstraction has 971 states and 1536 transitions. [2020-07-21 21:05:01,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:01,028 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1536 transitions. [2020-07-21 21:05:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-21 21:05:01,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:01,041 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 21:05:01,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:01,256 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:01,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:01,257 INFO L82 PathProgramCache]: Analyzing trace with hash -566193409, now seen corresponding path program 1 times [2020-07-21 21:05:01,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:01,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88481924] [2020-07-21 21:05:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:05:01,547 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:01,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:01,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:05:01,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:01,780 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 21:05:01,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:01,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88481924] [2020-07-21 21:05:01,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:01,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:05:01,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642647846] [2020-07-21 21:05:01,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:05:01,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:01,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:05:01,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:05:01,786 INFO L87 Difference]: Start difference. First operand 971 states and 1536 transitions. Second operand 4 states. [2020-07-21 21:05:02,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:02,004 INFO L93 Difference]: Finished difference Result 2854 states and 4513 transitions. [2020-07-21 21:05:02,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:05:02,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-21 21:05:02,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:02,016 INFO L225 Difference]: With dead ends: 2854 [2020-07-21 21:05:02,016 INFO L226 Difference]: Without dead ends: 1898 [2020-07-21 21:05:02,022 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 21:05:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-07-21 21:05:02,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-07-21 21:05:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-07-21 21:05:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2982 transitions. [2020-07-21 21:05:02,114 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2982 transitions. Word has length 318 [2020-07-21 21:05:02,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:02,114 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2982 transitions. [2020-07-21 21:05:02,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:05:02,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2982 transitions. [2020-07-21 21:05:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-21 21:05:02,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:02,123 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 21:05:02,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:02,337 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:02,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:02,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2021239662, now seen corresponding path program 1 times [2020-07-21 21:05:02,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:02,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333683998] [2020-07-21 21:05:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:05:02,672 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:02,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:02,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:05:02,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:02,790 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 21:05:02,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:02,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333683998] [2020-07-21 21:05:02,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:02,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:05:02,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087527618] [2020-07-21 21:05:02,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:05:02,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:02,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:05:02,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:05:02,793 INFO L87 Difference]: Start difference. First operand 1896 states and 2982 transitions. Second operand 4 states. [2020-07-21 21:05:03,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:03,165 INFO L93 Difference]: Finished difference Result 5590 states and 8787 transitions. [2020-07-21 21:05:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:05:03,165 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-07-21 21:05:03,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:03,185 INFO L225 Difference]: With dead ends: 5590 [2020-07-21 21:05:03,185 INFO L226 Difference]: Without dead ends: 3710 [2020-07-21 21:05:03,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 317 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 21:05:03,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2020-07-21 21:05:03,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3708. [2020-07-21 21:05:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3708 states. [2020-07-21 21:05:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 5794 transitions. [2020-07-21 21:05:03,357 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 5794 transitions. Word has length 320 [2020-07-21 21:05:03,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:03,357 INFO L479 AbstractCegarLoop]: Abstraction has 3708 states and 5794 transitions. [2020-07-21 21:05:03,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:05:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 5794 transitions. [2020-07-21 21:05:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 21:05:03,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:03,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:03,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:03,581 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:03,582 INFO L82 PathProgramCache]: Analyzing trace with hash -729165524, now seen corresponding path program 1 times [2020-07-21 21:05:03,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:03,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186844170] [2020-07-21 21:05:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:05:03,824 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:03,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:03,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:03,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:03,896 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 21:05:03,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:03,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186844170] [2020-07-21 21:05:03,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:03,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:03,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781659943] [2020-07-21 21:05:03,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:03,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:03,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:03,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:03,900 INFO L87 Difference]: Start difference. First operand 3708 states and 5794 transitions. Second operand 3 states. [2020-07-21 21:05:04,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:04,231 INFO L93 Difference]: Finished difference Result 11059 states and 17281 transitions. [2020-07-21 21:05:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:04,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 322 [2020-07-21 21:05:04,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:04,267 INFO L225 Difference]: With dead ends: 11059 [2020-07-21 21:05:04,267 INFO L226 Difference]: Without dead ends: 7384 [2020-07-21 21:05:04,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 320 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 21:05:04,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7384 states. [2020-07-21 21:05:04,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7384 to 3722. [2020-07-21 21:05:04,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3722 states. [2020-07-21 21:05:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 5811 transitions. [2020-07-21 21:05:04,513 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 5811 transitions. Word has length 322 [2020-07-21 21:05:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:04,513 INFO L479 AbstractCegarLoop]: Abstraction has 3722 states and 5811 transitions. [2020-07-21 21:05:04,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 5811 transitions. [2020-07-21 21:05:04,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 21:05:04,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:04,524 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 21:05:04,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:04,738 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:04,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1246792416, now seen corresponding path program 1 times [2020-07-21 21:05:04,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:04,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633366288] [2020-07-21 21:05:04,739 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:05:05,137 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:05,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:05,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 2050 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:05:05,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:05,257 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 21:05:05,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:05,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633366288] [2020-07-21 21:05:05,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:05,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:05,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787864938] [2020-07-21 21:05:05,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:05,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:05,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:05,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:05,259 INFO L87 Difference]: Start difference. First operand 3722 states and 5811 transitions. Second operand 3 states. [2020-07-21 21:05:05,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:05,579 INFO L93 Difference]: Finished difference Result 7590 states and 11949 transitions. [2020-07-21 21:05:05,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:05,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-21 21:05:05,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:05,611 INFO L225 Difference]: With dead ends: 7590 [2020-07-21 21:05:05,611 INFO L226 Difference]: Without dead ends: 6212 [2020-07-21 21:05:05,618 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 21:05:05,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6212 states. [2020-07-21 21:05:05,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6212 to 6194. [2020-07-21 21:05:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6194 states. [2020-07-21 21:05:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6194 states to 6194 states and 9663 transitions. [2020-07-21 21:05:05,910 INFO L78 Accepts]: Start accepts. Automaton has 6194 states and 9663 transitions. Word has length 324 [2020-07-21 21:05:05,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:05,911 INFO L479 AbstractCegarLoop]: Abstraction has 6194 states and 9663 transitions. [2020-07-21 21:05:05,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:05,911 INFO L276 IsEmpty]: Start isEmpty. Operand 6194 states and 9663 transitions. [2020-07-21 21:05:05,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 21:05:05,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:05,925 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 21:05:06,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:06,139 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:06,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:06,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1028183158, now seen corresponding path program 1 times [2020-07-21 21:05:06,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:06,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029777850] [2020-07-21 21:05:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:05:06,565 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:06,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:06,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 2050 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:05:06,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:06,685 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 21:05:06,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:06,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029777850] [2020-07-21 21:05:06,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:06,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:06,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393639931] [2020-07-21 21:05:06,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:06,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:06,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:06,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:06,688 INFO L87 Difference]: Start difference. First operand 6194 states and 9663 transitions. Second operand 3 states. [2020-07-21 21:05:07,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:07,119 INFO L93 Difference]: Finished difference Result 13686 states and 21553 transitions. [2020-07-21 21:05:07,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:07,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-21 21:05:07,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:07,166 INFO L225 Difference]: With dead ends: 13686 [2020-07-21 21:05:07,167 INFO L226 Difference]: Without dead ends: 10992 [2020-07-21 21:05:07,185 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 21:05:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10992 states. [2020-07-21 21:05:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10992 to 10982. [2020-07-21 21:05:07,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10982 states. [2020-07-21 21:05:07,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10982 states to 10982 states and 17115 transitions. [2020-07-21 21:05:07,695 INFO L78 Accepts]: Start accepts. Automaton has 10982 states and 17115 transitions. Word has length 324 [2020-07-21 21:05:07,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:07,696 INFO L479 AbstractCegarLoop]: Abstraction has 10982 states and 17115 transitions. [2020-07-21 21:05:07,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:07,696 INFO L276 IsEmpty]: Start isEmpty. Operand 10982 states and 17115 transitions. [2020-07-21 21:05:07,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 21:05:07,717 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:07,717 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 21:05:07,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:07,932 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:07,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:07,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1817342996, now seen corresponding path program 1 times [2020-07-21 21:05:07,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:07,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239054342] [2020-07-21 21:05:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:05:08,283 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:08,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:08,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 2051 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:05:08,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:08,404 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 21:05:08,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:08,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239054342] [2020-07-21 21:05:08,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:08,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:08,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768632439] [2020-07-21 21:05:08,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:08,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:08,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:08,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:08,406 INFO L87 Difference]: Start difference. First operand 10982 states and 17115 transitions. Second operand 3 states. [2020-07-21 21:05:09,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:09,092 INFO L93 Difference]: Finished difference Result 25442 states and 40073 transitions. [2020-07-21 21:05:09,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:09,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-21 21:05:09,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:09,144 INFO L225 Difference]: With dead ends: 25442 [2020-07-21 21:05:09,144 INFO L226 Difference]: Without dead ends: 20536 [2020-07-21 21:05:09,161 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 21:05:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20536 states. [2020-07-21 21:05:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20536 to 20518. [2020-07-21 21:05:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20518 states. [2020-07-21 21:05:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20518 states to 20518 states and 31935 transitions. [2020-07-21 21:05:10,106 INFO L78 Accepts]: Start accepts. Automaton has 20518 states and 31935 transitions. Word has length 324 [2020-07-21 21:05:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:10,106 INFO L479 AbstractCegarLoop]: Abstraction has 20518 states and 31935 transitions. [2020-07-21 21:05:10,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:10,106 INFO L276 IsEmpty]: Start isEmpty. Operand 20518 states and 31935 transitions. [2020-07-21 21:05:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 21:05:10,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:10,135 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 21:05:10,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:10,349 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:10,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:10,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1234124168, now seen corresponding path program 1 times [2020-07-21 21:05:10,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:10,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476010324] [2020-07-21 21:05:10,350 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:05:10,696 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:10,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:10,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:05:10,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:10,782 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 21:05:10,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:10,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476010324] [2020-07-21 21:05:10,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:10,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:10,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102364270] [2020-07-21 21:05:10,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:10,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:10,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:10,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:10,785 INFO L87 Difference]: Start difference. First operand 20518 states and 31935 transitions. Second operand 3 states. [2020-07-21 21:05:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:12,324 INFO L93 Difference]: Finished difference Result 48794 states and 76793 transitions. [2020-07-21 21:05:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:12,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-21 21:05:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:12,430 INFO L225 Difference]: With dead ends: 48794 [2020-07-21 21:05:12,430 INFO L226 Difference]: Without dead ends: 39404 [2020-07-21 21:05:12,463 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 21:05:12,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39404 states. [2020-07-21 21:05:14,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39404 to 39370. [2020-07-21 21:05:14,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39370 states. [2020-07-21 21:05:14,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39370 states to 39370 states and 61199 transitions. [2020-07-21 21:05:14,382 INFO L78 Accepts]: Start accepts. Automaton has 39370 states and 61199 transitions. Word has length 324 [2020-07-21 21:05:14,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:14,383 INFO L479 AbstractCegarLoop]: Abstraction has 39370 states and 61199 transitions. [2020-07-21 21:05:14,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 39370 states and 61199 transitions. [2020-07-21 21:05:14,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 21:05:14,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:14,429 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] [2020-07-21 21:05:14,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:14,643 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:14,644 INFO L82 PathProgramCache]: Analyzing trace with hash 89294345, now seen corresponding path program 1 times [2020-07-21 21:05:14,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:14,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955397735] [2020-07-21 21:05:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:05:14,978 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:14,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:14,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 2053 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:14,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:15,103 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 21:05:15,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:15,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955397735] [2020-07-21 21:05:15,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:15,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:15,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155772308] [2020-07-21 21:05:15,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:15,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:15,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:15,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:15,106 INFO L87 Difference]: Start difference. First operand 39370 states and 61199 transitions. Second operand 3 states. [2020-07-21 21:05:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:17,461 INFO L93 Difference]: Finished difference Result 116329 states and 180626 transitions. [2020-07-21 21:05:17,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:17,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-21 21:05:17,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:17,585 INFO L225 Difference]: With dead ends: 116329 [2020-07-21 21:05:17,585 INFO L226 Difference]: Without dead ends: 77139 [2020-07-21 21:05:17,686 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 21:05:17,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77139 states. [2020-07-21 21:05:20,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77139 to 77137. [2020-07-21 21:05:20,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77137 states. [2020-07-21 21:05:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77137 states to 77137 states and 119188 transitions. [2020-07-21 21:05:20,149 INFO L78 Accepts]: Start accepts. Automaton has 77137 states and 119188 transitions. Word has length 324 [2020-07-21 21:05:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:20,149 INFO L479 AbstractCegarLoop]: Abstraction has 77137 states and 119188 transitions. [2020-07-21 21:05:20,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 77137 states and 119188 transitions. [2020-07-21 21:05:20,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 21:05:20,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:20,196 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 21:05:20,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:20,398 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:20,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:20,398 INFO L82 PathProgramCache]: Analyzing trace with hash 396725324, now seen corresponding path program 1 times [2020-07-21 21:05:20,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:20,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890853053] [2020-07-21 21:05:20,402 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:05:20,629 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:20,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:20,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:05:20,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:20,712 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 21:05:20,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:20,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890853053] [2020-07-21 21:05:20,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:20,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:05:20,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335858589] [2020-07-21 21:05:20,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:05:20,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:20,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:05:20,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:05:20,714 INFO L87 Difference]: Start difference. First operand 77137 states and 119188 transitions. Second operand 4 states. [2020-07-21 21:05:25,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:25,333 INFO L93 Difference]: Finished difference Result 221597 states and 342126 transitions. [2020-07-21 21:05:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:05:25,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-21 21:05:25,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:25,508 INFO L225 Difference]: With dead ends: 221597 [2020-07-21 21:05:25,508 INFO L226 Difference]: Without dead ends: 145031 [2020-07-21 21:05:25,585 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 21:05:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145031 states. [2020-07-21 21:05:30,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145031 to 77511. [2020-07-21 21:05:30,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77511 states. [2020-07-21 21:05:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77511 states to 77511 states and 119823 transitions. [2020-07-21 21:05:30,392 INFO L78 Accepts]: Start accepts. Automaton has 77511 states and 119823 transitions. Word has length 324 [2020-07-21 21:05:30,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:30,393 INFO L479 AbstractCegarLoop]: Abstraction has 77511 states and 119823 transitions. [2020-07-21 21:05:30,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:05:30,393 INFO L276 IsEmpty]: Start isEmpty. Operand 77511 states and 119823 transitions. [2020-07-21 21:05:30,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 21:05:30,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:30,441 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 21:05:30,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:30,647 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:30,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:30,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1859394135, now seen corresponding path program 1 times [2020-07-21 21:05:30,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:30,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084773892] [2020-07-21 21:05:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:05:30,890 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:30,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:30,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:05:30,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:31,018 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 21:05:31,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:31,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084773892] [2020-07-21 21:05:31,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:31,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 21:05:31,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301381370] [2020-07-21 21:05:31,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 21:05:31,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:31,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 21:05:31,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 21:05:31,020 INFO L87 Difference]: Start difference. First operand 77511 states and 119823 transitions. Second operand 9 states. [2020-07-21 21:06:04,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:04,645 INFO L93 Difference]: Finished difference Result 749893 states and 1177252 transitions. [2020-07-21 21:06:04,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 21:06:04,646 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 326 [2020-07-21 21:06:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:05,787 INFO L225 Difference]: With dead ends: 749893 [2020-07-21 21:06:05,788 INFO L226 Difference]: Without dead ends: 725479 [2020-07-21 21:06:05,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 21:06:06,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725479 states. [2020-07-21 21:06:32,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725479 to 257687. [2020-07-21 21:06:32,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257687 states. [2020-07-21 21:06:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257687 states to 257687 states and 401443 transitions. [2020-07-21 21:06:32,682 INFO L78 Accepts]: Start accepts. Automaton has 257687 states and 401443 transitions. Word has length 326 [2020-07-21 21:06:32,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:32,683 INFO L479 AbstractCegarLoop]: Abstraction has 257687 states and 401443 transitions. [2020-07-21 21:06:32,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 21:06:32,683 INFO L276 IsEmpty]: Start isEmpty. Operand 257687 states and 401443 transitions. [2020-07-21 21:06:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 21:06:32,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:32,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:06:33,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:33,026 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:33,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:33,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1687718974, now seen corresponding path program 1 times [2020-07-21 21:06:33,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:33,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885405392] [2020-07-21 21:06:33,027 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:06:33,380 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:06:33,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:33,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 2064 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 21:06:33,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:33,685 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 21:06:33,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:33,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885405392] [2020-07-21 21:06:33,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:33,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 21:06:33,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307601620] [2020-07-21 21:06:33,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 21:06:33,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:33,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 21:06:33,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 21:06:33,690 INFO L87 Difference]: Start difference. First operand 257687 states and 401443 transitions. Second operand 8 states. [2020-07-21 21:07:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:07:01,028 INFO L93 Difference]: Finished difference Result 503473 states and 789769 transitions. [2020-07-21 21:07:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 21:07:01,029 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 326 [2020-07-21 21:07:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:07:01,538 INFO L225 Difference]: With dead ends: 503473 [2020-07-21 21:07:01,538 INFO L226 Difference]: Without dead ends: 358951 [2020-07-21 21:07:01,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 319 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 21:07:01,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358951 states. [2020-07-21 21:07:10,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358951 to 120945. [2020-07-21 21:07:10,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120945 states. [2020-07-21 21:07:11,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120945 states to 120945 states and 185605 transitions. [2020-07-21 21:07:11,041 INFO L78 Accepts]: Start accepts. Automaton has 120945 states and 185605 transitions. Word has length 326 [2020-07-21 21:07:11,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:07:11,041 INFO L479 AbstractCegarLoop]: Abstraction has 120945 states and 185605 transitions. [2020-07-21 21:07:11,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 21:07:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 120945 states and 185605 transitions. [2020-07-21 21:07:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 21:07:11,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:07:11,101 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 21:07:11,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:11,302 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:07:11,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:07:11,303 INFO L82 PathProgramCache]: Analyzing trace with hash 636234277, now seen corresponding path program 1 times [2020-07-21 21:07:11,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:07:11,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131904959] [2020-07-21 21:07:11,304 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:07:11,651 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:07:11,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:07:11,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:07:11,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:07:11,804 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 21:07:11,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:07:11,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131904959] [2020-07-21 21:07:11,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:07:11,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:07:11,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018320367] [2020-07-21 21:07:11,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:07:11,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:07:11,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:07:11,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:07:11,807 INFO L87 Difference]: Start difference. First operand 120945 states and 185605 transitions. Second operand 3 states. [2020-07-21 21:07:24,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:07:24,749 INFO L93 Difference]: Finished difference Result 296951 states and 457217 transitions. [2020-07-21 21:07:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:07:24,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 21:07:24,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:07:24,957 INFO L225 Difference]: With dead ends: 296951 [2020-07-21 21:07:24,957 INFO L226 Difference]: Without dead ends: 177849 [2020-07-21 21:07:25,049 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 21:07:25,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177849 states. [2020-07-21 21:07:41,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177849 to 154423. [2020-07-21 21:07:41,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154423 states. [2020-07-21 21:07:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154423 states to 154423 states and 238807 transitions. [2020-07-21 21:07:41,697 INFO L78 Accepts]: Start accepts. Automaton has 154423 states and 238807 transitions. Word has length 326 [2020-07-21 21:07:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:07:41,698 INFO L479 AbstractCegarLoop]: Abstraction has 154423 states and 238807 transitions. [2020-07-21 21:07:41,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:07:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 154423 states and 238807 transitions. [2020-07-21 21:07:41,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 21:07:41,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:07:41,754 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 21:07:41,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:41,962 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:07:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:07:41,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1899380923, now seen corresponding path program 1 times [2020-07-21 21:07:41,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:07:41,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754005283] [2020-07-21 21:07:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:07:42,209 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:07:42,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:07:42,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:07:42,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:07:42,281 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 21:07:42,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:07:42,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754005283] [2020-07-21 21:07:42,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:07:42,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:07:42,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114439235] [2020-07-21 21:07:42,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:07:42,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:07:42,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:07:42,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:07:42,283 INFO L87 Difference]: Start difference. First operand 154423 states and 238807 transitions. Second operand 4 states. [2020-07-21 21:07:53,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:07:53,828 INFO L93 Difference]: Finished difference Result 310101 states and 479448 transitions. [2020-07-21 21:07:53,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:07:53,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-21 21:07:53,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:07:54,076 INFO L225 Difference]: With dead ends: 310101 [2020-07-21 21:07:54,076 INFO L226 Difference]: Without dead ends: 155394 [2020-07-21 21:07:54,205 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 21:07:54,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155394 states. [2020-07-21 21:08:07,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155394 to 155392. [2020-07-21 21:08:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155392 states. [2020-07-21 21:08:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155392 states to 155392 states and 239029 transitions. [2020-07-21 21:08:08,125 INFO L78 Accepts]: Start accepts. Automaton has 155392 states and 239029 transitions. Word has length 326 [2020-07-21 21:08:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:08:08,126 INFO L479 AbstractCegarLoop]: Abstraction has 155392 states and 239029 transitions. [2020-07-21 21:08:08,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:08:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 155392 states and 239029 transitions. [2020-07-21 21:08:08,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 21:08:08,201 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:08:08,201 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 21:08:08,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:08:08,402 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:08:08,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:08:08,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1554412330, now seen corresponding path program 1 times [2020-07-21 21:08:08,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:08:08,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738108429] [2020-07-21 21:08:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:08:08,643 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:08:08,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:08:08,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:08:08,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:08:08,714 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 21:08:08,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:08:08,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738108429] [2020-07-21 21:08:08,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:08:08,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:08:08,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705465087] [2020-07-21 21:08:08,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:08:08,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:08:08,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:08:08,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:08:08,717 INFO L87 Difference]: Start difference. First operand 155392 states and 239029 transitions. Second operand 4 states. [2020-07-21 21:08:33,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:33,529 INFO L93 Difference]: Finished difference Result 464575 states and 714410 transitions. [2020-07-21 21:08:33,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:08:33,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-21 21:08:33,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:33,989 INFO L225 Difference]: With dead ends: 464575 [2020-07-21 21:08:33,989 INFO L226 Difference]: Without dead ends: 310305 [2020-07-21 21:08:34,120 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 21:08:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310305 states. [2020-07-21 21:08:47,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310305 to 156447. [2020-07-21 21:08:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156447 states. [2020-07-21 21:08:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156447 states to 156447 states and 240766 transitions. [2020-07-21 21:08:48,251 INFO L78 Accepts]: Start accepts. Automaton has 156447 states and 240766 transitions. Word has length 326 [2020-07-21 21:08:48,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:08:48,252 INFO L479 AbstractCegarLoop]: Abstraction has 156447 states and 240766 transitions. [2020-07-21 21:08:48,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:08:48,252 INFO L276 IsEmpty]: Start isEmpty. Operand 156447 states and 240766 transitions. [2020-07-21 21:08:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 21:08:48,317 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:08:48,318 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 21:08:48,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:08:48,525 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:08:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:08:48,526 INFO L82 PathProgramCache]: Analyzing trace with hash -683394187, now seen corresponding path program 1 times [2020-07-21 21:08:48,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:08:48,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743463474] [2020-07-21 21:08:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:08:48,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:08:48,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:08:48,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:08:48,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:08:48,834 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 21:08:48,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:08:48,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743463474] [2020-07-21 21:08:48,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:08:48,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:08:48,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9970300] [2020-07-21 21:08:48,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:08:48,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:08:48,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:08:48,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:08:48,836 INFO L87 Difference]: Start difference. First operand 156447 states and 240766 transitions. Second operand 3 states. [2020-07-21 21:09:12,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:09:12,290 INFO L93 Difference]: Finished difference Result 465964 states and 716457 transitions. [2020-07-21 21:09:12,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:09:12,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 21:09:12,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:09:12,802 INFO L225 Difference]: With dead ends: 465964 [2020-07-21 21:09:12,802 INFO L226 Difference]: Without dead ends: 311266 [2020-07-21 21:09:12,980 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 21:09:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311266 states. [2020-07-21 21:09:31,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311266 to 156646. [2020-07-21 21:09:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156646 states. [2020-07-21 21:09:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156646 states to 156646 states and 240995 transitions. [2020-07-21 21:09:31,474 INFO L78 Accepts]: Start accepts. Automaton has 156646 states and 240995 transitions. Word has length 328 [2020-07-21 21:09:31,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:09:31,474 INFO L479 AbstractCegarLoop]: Abstraction has 156646 states and 240995 transitions. [2020-07-21 21:09:31,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:09:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 156646 states and 240995 transitions. [2020-07-21 21:09:31,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 21:09:31,525 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:09:31,526 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 21:09:31,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:31,739 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:09:31,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:09:31,740 INFO L82 PathProgramCache]: Analyzing trace with hash 962127500, now seen corresponding path program 1 times [2020-07-21 21:09:31,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:09:31,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327137981] [2020-07-21 21:09:31,741 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:09:31,960 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:09:31,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:09:31,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:09:31,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:09:32,030 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 21:09:32,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:09:32,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327137981] [2020-07-21 21:09:32,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:09:32,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:09:32,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173771442] [2020-07-21 21:09:32,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:09:32,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:09:32,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:09:32,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:09:32,032 INFO L87 Difference]: Start difference. First operand 156646 states and 240995 transitions. Second operand 3 states. [2020-07-21 21:09:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:09:54,460 INFO L93 Difference]: Finished difference Result 464956 states and 714849 transitions. [2020-07-21 21:09:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:09:54,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 21:09:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:09:55,510 INFO L225 Difference]: With dead ends: 464956 [2020-07-21 21:09:55,510 INFO L226 Difference]: Without dead ends: 310734 [2020-07-21 21:09:55,648 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 21:09:55,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310734 states. [2020-07-21 21:10:14,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310734 to 156876. [2020-07-21 21:10:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156876 states. [2020-07-21 21:10:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156876 states to 156876 states and 241269 transitions. [2020-07-21 21:10:14,755 INFO L78 Accepts]: Start accepts. Automaton has 156876 states and 241269 transitions. Word has length 328 [2020-07-21 21:10:14,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:10:14,755 INFO L479 AbstractCegarLoop]: Abstraction has 156876 states and 241269 transitions. [2020-07-21 21:10:14,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:10:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 156876 states and 241269 transitions. [2020-07-21 21:10:14,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-21 21:10:14,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:10:14,819 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 21:10:15,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:10:15,020 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:10:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:10:15,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1352069022, now seen corresponding path program 1 times [2020-07-21 21:10:15,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:10:15,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169638506] [2020-07-21 21:10:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:10:15,381 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:10:15,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:10:15,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 2070 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:10:15,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:10:15,472 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 21:10:15,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:10:15,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169638506] [2020-07-21 21:10:15,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:10:15,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:10:15,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310862926] [2020-07-21 21:10:15,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:10:15,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:10:15,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:10:15,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:10:15,474 INFO L87 Difference]: Start difference. First operand 156876 states and 241269 transitions. Second operand 3 states. [2020-07-21 21:10:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:10:38,177 INFO L93 Difference]: Finished difference Result 441342 states and 678308 transitions. [2020-07-21 21:10:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:10:38,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-07-21 21:10:38,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:10:38,610 INFO L225 Difference]: With dead ends: 441342 [2020-07-21 21:10:38,610 INFO L226 Difference]: Without dead ends: 287397 [2020-07-21 21:10:38,744 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 21:10:38,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287397 states. [2020-07-21 21:11:07,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287397 to 287395. [2020-07-21 21:11:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287395 states. [2020-07-21 21:11:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287395 states to 287395 states and 439249 transitions. [2020-07-21 21:11:07,777 INFO L78 Accepts]: Start accepts. Automaton has 287395 states and 439249 transitions. Word has length 329 [2020-07-21 21:11:07,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:11:07,777 INFO L479 AbstractCegarLoop]: Abstraction has 287395 states and 439249 transitions. [2020-07-21 21:11:07,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:11:07,778 INFO L276 IsEmpty]: Start isEmpty. Operand 287395 states and 439249 transitions. [2020-07-21 21:11:07,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-21 21:11:07,896 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:11:07,897 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 21:11:08,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:11:08,098 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:11:08,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:11:08,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1267458329, now seen corresponding path program 1 times [2020-07-21 21:11:08,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:11:08,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608894527] [2020-07-21 21:11:08,099 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:11:08,451 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:11:08,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:11:08,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:11:08,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:11:08,572 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 21:11:08,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:11:08,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608894527] [2020-07-21 21:11:08,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:11:08,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 21:11:08,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714117990] [2020-07-21 21:11:08,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 21:11:08,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:11:08,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 21:11:08,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 21:11:08,574 INFO L87 Difference]: Start difference. First operand 287395 states and 439249 transitions. Second operand 9 states. [2020-07-21 21:14:46,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:14:46,337 INFO L93 Difference]: Finished difference Result 2311455 states and 3577162 transitions. [2020-07-21 21:14:46,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 21:14:46,337 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 329 [2020-07-21 21:14:46,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:14:50,671 INFO L225 Difference]: With dead ends: 2311455 [2020-07-21 21:14:50,671 INFO L226 Difference]: Without dead ends: 2195685 [2020-07-21 21:14:51,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 21:14:52,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195685 states.