/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 NUM_VARIABLES --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.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:29:21,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:29:21,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:29:21,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:29:21,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:29:21,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:29:21,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:29:21,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:29:21,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:29:21,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:29:21,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:29:21,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:29:21,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:29:21,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:29:21,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:29:21,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:29:21,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:29:21,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:29:21,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:29:21,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:29:21,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:29:21,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:29:21,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:29:21,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:29:21,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 17:29:21,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:29:21,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:29:21,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:29:21,453 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 17:29:21,474 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:29:21,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:29:21,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:29:21,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:29:21,477 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:29:21,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:29:21,477 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:29:21,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:29:21,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:29:21,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:29:21,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:29:21,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:29:21,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:29:21,479 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:29:21,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:29:21,480 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:29:21,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:29:21,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:29:21,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:29:21,481 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:29:21,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:29:21,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:29:21,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:29:21,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:29:21,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:29:21,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:29:21,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:21,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:29:21,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:29:21,482 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 -> NUM_VARIABLES 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 17:29:21,762 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:29:21,776 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:29:21,780 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:29:21,781 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:29:21,781 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:29:21,782 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 17:29:21,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39f2b700c/6981d98f91da46f5ac98ec999898a39f/FLAGe653dd947 [2020-07-21 17:29:22,457 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:29:22,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 17:29:22,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39f2b700c/6981d98f91da46f5ac98ec999898a39f/FLAGe653dd947 [2020-07-21 17:29:22,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39f2b700c/6981d98f91da46f5ac98ec999898a39f [2020-07-21 17:29:22,730 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:29:22,734 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:29:22,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:29:22,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:29:22,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:29:22,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:29:22" (1/1) ... [2020-07-21 17:29:22,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@111dfa07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:22, skipping insertion in model container [2020-07-21 17:29:22,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:29:22" (1/1) ... [2020-07-21 17:29:22,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:29:22,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:29:23,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:29:23,746 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:29:24,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:29:24,417 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:29:24,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24 WrapperNode [2020-07-21 17:29:24,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:29:24,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:29:24,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:29:24,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:29:24,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (1/1) ... [2020-07-21 17:29:24,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (1/1) ... [2020-07-21 17:29:24,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (1/1) ... [2020-07-21 17:29:24,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (1/1) ... [2020-07-21 17:29:24,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (1/1) ... [2020-07-21 17:29:24,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (1/1) ... [2020-07-21 17:29:24,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (1/1) ... [2020-07-21 17:29:24,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:29:24,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:29:24,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:29:24,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:29:24,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (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 17:29:24,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:29:24,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:29:24,712 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:29:24,712 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:29:24,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:29:24,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 17:29:24,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 17:29:24,714 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 17:29:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:29:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:29:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 17:29:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 17:29:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 17:29:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 17:29:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 17:29:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 17:29:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 17:29:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 17:29:24,718 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:29:24,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:29:24,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:29:27,139 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:29:27,139 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 17:29:27,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:29:27 BoogieIcfgContainer [2020-07-21 17:29:27,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:29:27,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:29:27,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:29:27,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:29:27,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:29:22" (1/3) ... [2020-07-21 17:29:27,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656692bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:29:27, skipping insertion in model container [2020-07-21 17:29:27,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (2/3) ... [2020-07-21 17:29:27,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656692bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:29:27, skipping insertion in model container [2020-07-21 17:29:27,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:29:27" (3/3) ... [2020-07-21 17:29:27,175 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 17:29:27,189 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:29:27,204 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:29:27,223 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:29:27,266 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:29:27,266 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:29:27,266 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:29:27,266 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:29:27,266 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:29:27,267 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:29:27,268 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:29:27,268 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:29:27,329 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-21 17:29:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 17:29:27,378 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:27,380 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 17:29:27,380 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:27,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:27,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-21 17:29:27,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:27,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702327743] [2020-07-21 17:29:27,403 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 17:29:28,042 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:28,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:28,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 2101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:29:28,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:28,386 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 17:29:28,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:28,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702327743] [2020-07-21 17:29:28,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:28,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:29:28,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310178307] [2020-07-21 17:29:28,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:29:28,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:28,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:29:28,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:29:28,414 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-21 17:29:28,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:28,693 INFO L93 Difference]: Finished difference Result 2328 states and 4137 transitions. [2020-07-21 17:29:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:29:28,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-21 17:29:28,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:28,721 INFO L225 Difference]: With dead ends: 2328 [2020-07-21 17:29:28,722 INFO L226 Difference]: Without dead ends: 1542 [2020-07-21 17:29:28,730 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 17:29:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2020-07-21 17:29:28,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1540. [2020-07-21 17:29:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1540 states. [2020-07-21 17:29:28,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 2395 transitions. [2020-07-21 17:29:28,866 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 2395 transitions. Word has length 324 [2020-07-21 17:29:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:28,868 INFO L479 AbstractCegarLoop]: Abstraction has 1540 states and 2395 transitions. [2020-07-21 17:29:28,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:29:28,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 2395 transitions. [2020-07-21 17:29:28,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 17:29:28,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:28,874 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 17:29:29,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:29,090 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:29,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:29,091 INFO L82 PathProgramCache]: Analyzing trace with hash 559759921, now seen corresponding path program 1 times [2020-07-21 17:29:29,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:29,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369244721] [2020-07-21 17:29:29,092 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 17:29:29,572 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:29,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:29,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:29:29,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:29,738 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 17:29:29,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:29,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369244721] [2020-07-21 17:29:29,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:29,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:29,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535170391] [2020-07-21 17:29:29,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:29,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:29,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:29,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:29,748 INFO L87 Difference]: Start difference. First operand 1540 states and 2395 transitions. Second operand 3 states. [2020-07-21 17:29:30,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:30,048 INFO L93 Difference]: Finished difference Result 4422 states and 6847 transitions. [2020-07-21 17:29:30,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:30,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 17:29:30,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:30,065 INFO L225 Difference]: With dead ends: 4422 [2020-07-21 17:29:30,066 INFO L226 Difference]: Without dead ends: 2984 [2020-07-21 17:29:30,070 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 17:29:30,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2020-07-21 17:29:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2982. [2020-07-21 17:29:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2982 states. [2020-07-21 17:29:30,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 4607 transitions. [2020-07-21 17:29:30,189 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 4607 transitions. Word has length 326 [2020-07-21 17:29:30,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:30,190 INFO L479 AbstractCegarLoop]: Abstraction has 2982 states and 4607 transitions. [2020-07-21 17:29:30,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:30,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 4607 transitions. [2020-07-21 17:29:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 17:29:30,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:30,201 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 17:29:30,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:30,415 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:30,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:30,416 INFO L82 PathProgramCache]: Analyzing trace with hash 59250742, now seen corresponding path program 1 times [2020-07-21 17:29:30,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:30,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100447292] [2020-07-21 17:29:30,418 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 17:29:30,683 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:30,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:30,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:29:30,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:30,826 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 17:29:30,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:30,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100447292] [2020-07-21 17:29:30,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:30,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:30,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618580986] [2020-07-21 17:29:30,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:30,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:30,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:30,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:30,832 INFO L87 Difference]: Start difference. First operand 2982 states and 4607 transitions. Second operand 3 states. [2020-07-21 17:29:31,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:31,034 INFO L93 Difference]: Finished difference Result 8914 states and 13772 transitions. [2020-07-21 17:29:31,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:31,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 17:29:31,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:31,065 INFO L225 Difference]: With dead ends: 8914 [2020-07-21 17:29:31,066 INFO L226 Difference]: Without dead ends: 5947 [2020-07-21 17:29:31,075 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 17:29:31,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5947 states. [2020-07-21 17:29:31,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5947 to 2993. [2020-07-21 17:29:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2993 states. [2020-07-21 17:29:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4623 transitions. [2020-07-21 17:29:31,255 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4623 transitions. Word has length 326 [2020-07-21 17:29:31,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:31,256 INFO L479 AbstractCegarLoop]: Abstraction has 2993 states and 4623 transitions. [2020-07-21 17:29:31,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:31,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4623 transitions. [2020-07-21 17:29:31,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 17:29:31,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:31,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:31,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:31,484 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:31,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash -882201744, now seen corresponding path program 1 times [2020-07-21 17:29:31,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:31,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057136161] [2020-07-21 17:29:31,485 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 17:29:31,859 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:31,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:31,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 2106 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:29:31,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:32,008 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 17:29:32,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:32,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057136161] [2020-07-21 17:29:32,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:32,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:32,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446665262] [2020-07-21 17:29:32,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:32,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:32,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:32,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:32,011 INFO L87 Difference]: Start difference. First operand 2993 states and 4623 transitions. Second operand 3 states. [2020-07-21 17:29:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:32,234 INFO L93 Difference]: Finished difference Result 8871 states and 13690 transitions. [2020-07-21 17:29:32,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:32,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 17:29:32,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:32,263 INFO L225 Difference]: With dead ends: 8871 [2020-07-21 17:29:32,263 INFO L226 Difference]: Without dead ends: 5908 [2020-07-21 17:29:32,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 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 17:29:32,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2020-07-21 17:29:32,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 3003. [2020-07-21 17:29:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3003 states. [2020-07-21 17:29:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 4637 transitions. [2020-07-21 17:29:32,446 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 4637 transitions. Word has length 327 [2020-07-21 17:29:32,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:32,446 INFO L479 AbstractCegarLoop]: Abstraction has 3003 states and 4637 transitions. [2020-07-21 17:29:32,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:32,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 4637 transitions. [2020-07-21 17:29:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 17:29:32,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:32,457 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 17:29:32,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:32,673 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:32,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:32,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2128959444, now seen corresponding path program 1 times [2020-07-21 17:29:32,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:32,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205797990] [2020-07-21 17:29:32,674 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 17:29:33,130 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:33,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:33,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:29:33,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:33,303 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 17:29:33,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:33,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205797990] [2020-07-21 17:29:33,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:33,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:33,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482458916] [2020-07-21 17:29:33,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:33,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:33,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:33,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:33,308 INFO L87 Difference]: Start difference. First operand 3003 states and 4637 transitions. Second operand 3 states. [2020-07-21 17:29:33,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:33,578 INFO L93 Difference]: Finished difference Result 8613 states and 13241 transitions. [2020-07-21 17:29:33,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:33,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 17:29:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:33,607 INFO L225 Difference]: With dead ends: 8613 [2020-07-21 17:29:33,607 INFO L226 Difference]: Without dead ends: 5805 [2020-07-21 17:29:33,618 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 17:29:33,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5805 states. [2020-07-21 17:29:33,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5805 to 5803. [2020-07-21 17:29:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5803 states. [2020-07-21 17:29:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 8898 transitions. [2020-07-21 17:29:33,933 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 8898 transitions. Word has length 328 [2020-07-21 17:29:33,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:33,934 INFO L479 AbstractCegarLoop]: Abstraction has 5803 states and 8898 transitions. [2020-07-21 17:29:33,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:33,934 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 8898 transitions. [2020-07-21 17:29:33,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 17:29:33,951 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:33,952 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 17:29:34,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:34,166 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:34,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:34,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1426305655, now seen corresponding path program 1 times [2020-07-21 17:29:34,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:34,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662655381] [2020-07-21 17:29:34,167 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 17:29:34,410 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:34,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:34,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:29:34,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:34,497 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 17:29:34,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:34,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662655381] [2020-07-21 17:29:34,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:34,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:29:34,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537929599] [2020-07-21 17:29:34,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:29:34,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:34,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:29:34,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:29:34,500 INFO L87 Difference]: Start difference. First operand 5803 states and 8898 transitions. Second operand 4 states. [2020-07-21 17:29:34,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:34,877 INFO L93 Difference]: Finished difference Result 16042 states and 24430 transitions. [2020-07-21 17:29:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:29:34,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-21 17:29:34,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:34,913 INFO L225 Difference]: With dead ends: 16042 [2020-07-21 17:29:34,914 INFO L226 Difference]: Without dead ends: 10685 [2020-07-21 17:29:34,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 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 17:29:34,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10685 states. [2020-07-21 17:29:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10685 to 6017. [2020-07-21 17:29:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6017 states. [2020-07-21 17:29:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6017 states to 6017 states and 9262 transitions. [2020-07-21 17:29:35,284 INFO L78 Accepts]: Start accepts. Automaton has 6017 states and 9262 transitions. Word has length 328 [2020-07-21 17:29:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:35,284 INFO L479 AbstractCegarLoop]: Abstraction has 6017 states and 9262 transitions. [2020-07-21 17:29:35,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:29:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand 6017 states and 9262 transitions. [2020-07-21 17:29:35,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:29:35,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:35,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:35,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:35,520 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:35,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:35,521 INFO L82 PathProgramCache]: Analyzing trace with hash 730242313, now seen corresponding path program 1 times [2020-07-21 17:29:35,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:35,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756599714] [2020-07-21 17:29:35,522 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 17:29:35,768 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:35,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:35,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:29:35,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:35,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:35,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756599714] [2020-07-21 17:29:35,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:35,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:29:35,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251116475] [2020-07-21 17:29:35,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:29:35,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:35,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:29:35,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:29:35,896 INFO L87 Difference]: Start difference. First operand 6017 states and 9262 transitions. Second operand 4 states. [2020-07-21 17:29:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:36,669 INFO L93 Difference]: Finished difference Result 10421 states and 16168 transitions. [2020-07-21 17:29:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:29:36,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 17:29:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:36,690 INFO L225 Difference]: With dead ends: 10421 [2020-07-21 17:29:36,690 INFO L226 Difference]: Without dead ends: 9233 [2020-07-21 17:29:36,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:29:36,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9233 states. [2020-07-21 17:29:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9233 to 9231. [2020-07-21 17:29:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9231 states. [2020-07-21 17:29:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9231 states to 9231 states and 14179 transitions. [2020-07-21 17:29:37,127 INFO L78 Accepts]: Start accepts. Automaton has 9231 states and 14179 transitions. Word has length 330 [2020-07-21 17:29:37,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:37,128 INFO L479 AbstractCegarLoop]: Abstraction has 9231 states and 14179 transitions. [2020-07-21 17:29:37,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:29:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 9231 states and 14179 transitions. [2020-07-21 17:29:37,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:29:37,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:37,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:37,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:37,362 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:37,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:37,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2049820272, now seen corresponding path program 1 times [2020-07-21 17:29:37,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:37,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401444372] [2020-07-21 17:29:37,363 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 17:29:37,605 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:37,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:37,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:29:37,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:37,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:37,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401444372] [2020-07-21 17:29:37,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:37,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 17:29:37,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289946106] [2020-07-21 17:29:37,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:29:37,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:37,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:29:37,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:29:37,746 INFO L87 Difference]: Start difference. First operand 9231 states and 14179 transitions. Second operand 9 states. [2020-07-21 17:29:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:44,262 INFO L93 Difference]: Finished difference Result 60901 states and 95572 transitions. [2020-07-21 17:29:44,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 17:29:44,262 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 330 [2020-07-21 17:29:44,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:44,521 INFO L225 Difference]: With dead ends: 60901 [2020-07-21 17:29:44,521 INFO L226 Difference]: Without dead ends: 59679 [2020-07-21 17:29:44,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 324 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 17:29:44,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59679 states. [2020-07-21 17:29:47,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59679 to 25321. [2020-07-21 17:29:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25321 states. [2020-07-21 17:29:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25321 states to 25321 states and 39327 transitions. [2020-07-21 17:29:47,203 INFO L78 Accepts]: Start accepts. Automaton has 25321 states and 39327 transitions. Word has length 330 [2020-07-21 17:29:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:47,204 INFO L479 AbstractCegarLoop]: Abstraction has 25321 states and 39327 transitions. [2020-07-21 17:29:47,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:29:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 25321 states and 39327 transitions. [2020-07-21 17:29:47,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:29:47,242 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:47,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:47,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:47,456 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:47,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1852142271, now seen corresponding path program 1 times [2020-07-21 17:29:47,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:47,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262012147] [2020-07-21 17:29:47,457 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 17:29:47,815 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:47,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:47,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:29:47,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:47,883 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 17:29:47,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:47,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262012147] [2020-07-21 17:29:47,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:47,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:47,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245494764] [2020-07-21 17:29:47,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:47,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:47,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:47,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:47,886 INFO L87 Difference]: Start difference. First operand 25321 states and 39327 transitions. Second operand 3 states. [2020-07-21 17:29:49,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:49,171 INFO L93 Difference]: Finished difference Result 59005 states and 92166 transitions. [2020-07-21 17:29:49,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:49,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 17:29:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:49,229 INFO L225 Difference]: With dead ends: 59005 [2020-07-21 17:29:49,230 INFO L226 Difference]: Without dead ends: 35323 [2020-07-21 17:29:49,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 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 17:29:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35323 states. [2020-07-21 17:29:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35323 to 31293. [2020-07-21 17:29:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31293 states. [2020-07-21 17:29:50,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31293 states to 31293 states and 49163 transitions. [2020-07-21 17:29:50,858 INFO L78 Accepts]: Start accepts. Automaton has 31293 states and 49163 transitions. Word has length 330 [2020-07-21 17:29:50,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:50,859 INFO L479 AbstractCegarLoop]: Abstraction has 31293 states and 49163 transitions. [2020-07-21 17:29:50,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:50,859 INFO L276 IsEmpty]: Start isEmpty. Operand 31293 states and 49163 transitions. [2020-07-21 17:29:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:29:50,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:50,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:51,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:51,128 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:51,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:51,129 INFO L82 PathProgramCache]: Analyzing trace with hash 858352887, now seen corresponding path program 1 times [2020-07-21 17:29:51,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:51,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082788458] [2020-07-21 17:29:51,130 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 17:29:51,367 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:51,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:51,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:29:51,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:51,446 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 17:29:51,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:51,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082788458] [2020-07-21 17:29:51,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:51,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:51,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502700913] [2020-07-21 17:29:51,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:51,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:51,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:51,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:51,449 INFO L87 Difference]: Start difference. First operand 31293 states and 49163 transitions. Second operand 3 states. [2020-07-21 17:29:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:54,002 INFO L93 Difference]: Finished difference Result 92587 states and 145193 transitions. [2020-07-21 17:29:54,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:54,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 17:29:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:54,102 INFO L225 Difference]: With dead ends: 92587 [2020-07-21 17:29:54,102 INFO L226 Difference]: Without dead ends: 61936 [2020-07-21 17:29:54,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 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 17:29:54,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61936 states. [2020-07-21 17:29:55,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61936 to 31390. [2020-07-21 17:29:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31390 states. [2020-07-21 17:29:55,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31390 states to 31390 states and 49293 transitions. [2020-07-21 17:29:55,911 INFO L78 Accepts]: Start accepts. Automaton has 31390 states and 49293 transitions. Word has length 330 [2020-07-21 17:29:55,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:55,911 INFO L479 AbstractCegarLoop]: Abstraction has 31390 states and 49293 transitions. [2020-07-21 17:29:55,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:55,912 INFO L276 IsEmpty]: Start isEmpty. Operand 31390 states and 49293 transitions. [2020-07-21 17:29:55,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 17:29:55,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:55,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:56,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:56,152 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:56,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:56,153 INFO L82 PathProgramCache]: Analyzing trace with hash 903222164, now seen corresponding path program 1 times [2020-07-21 17:29:56,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:56,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400386037] [2020-07-21 17:29:56,154 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 17:29:56,417 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:56,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:56,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:29:56,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:56,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:56,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400386037] [2020-07-21 17:29:56,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:56,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:29:56,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848686816] [2020-07-21 17:29:56,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:29:56,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:56,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:29:56,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:29:56,495 INFO L87 Difference]: Start difference. First operand 31390 states and 49293 transitions. Second operand 4 states. [2020-07-21 17:29:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:57,968 INFO L93 Difference]: Finished difference Result 64315 states and 100881 transitions. [2020-07-21 17:29:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:29:57,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-07-21 17:29:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:58,043 INFO L225 Difference]: With dead ends: 64315 [2020-07-21 17:29:58,043 INFO L226 Difference]: Without dead ends: 32165 [2020-07-21 17:29:58,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 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 17:29:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32165 states. [2020-07-21 17:30:00,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32165 to 32163. [2020-07-21 17:30:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32163 states. [2020-07-21 17:30:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32163 states to 32163 states and 50222 transitions. [2020-07-21 17:30:00,600 INFO L78 Accepts]: Start accepts. Automaton has 32163 states and 50222 transitions. Word has length 331 [2020-07-21 17:30:00,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:30:00,600 INFO L479 AbstractCegarLoop]: Abstraction has 32163 states and 50222 transitions. [2020-07-21 17:30:00,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:30:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 32163 states and 50222 transitions. [2020-07-21 17:30:00,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 17:30:00,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:30:00,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:30:00,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:00,818 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:30:00,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:30:00,819 INFO L82 PathProgramCache]: Analyzing trace with hash -2015031549, now seen corresponding path program 1 times [2020-07-21 17:30:00,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:30:00,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19417723] [2020-07-21 17:30:00,822 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 17:30:01,056 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:30:01,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:30:01,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:30:01,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:30:01,198 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 17:30:01,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:30:01,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19417723] [2020-07-21 17:30:01,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:30:01,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 17:30:01,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322103485] [2020-07-21 17:30:01,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:30:01,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:30:01,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:30:01,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:30:01,202 INFO L87 Difference]: Start difference. First operand 32163 states and 50222 transitions. Second operand 9 states. [2020-07-21 17:30:13,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:30:13,129 INFO L93 Difference]: Finished difference Result 158183 states and 250386 transitions. [2020-07-21 17:30:13,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 17:30:13,130 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 332 [2020-07-21 17:30:13,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:30:13,324 INFO L225 Difference]: With dead ends: 158183 [2020-07-21 17:30:13,324 INFO L226 Difference]: Without dead ends: 152253 [2020-07-21 17:30:13,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 17:30:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152253 states. [2020-07-21 17:30:19,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152253 to 80325. [2020-07-21 17:30:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80325 states. [2020-07-21 17:30:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80325 states to 80325 states and 126626 transitions. [2020-07-21 17:30:19,691 INFO L78 Accepts]: Start accepts. Automaton has 80325 states and 126626 transitions. Word has length 332 [2020-07-21 17:30:19,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:30:19,691 INFO L479 AbstractCegarLoop]: Abstraction has 80325 states and 126626 transitions. [2020-07-21 17:30:19,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:30:19,692 INFO L276 IsEmpty]: Start isEmpty. Operand 80325 states and 126626 transitions. [2020-07-21 17:30:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 17:30:19,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:30:19,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:30:19,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:19,945 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:30:19,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:30:19,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1137990347, now seen corresponding path program 1 times [2020-07-21 17:30:19,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:30:19,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806902111] [2020-07-21 17:30:19,947 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 17:30:20,313 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:30:20,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:30:20,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 2122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:30:20,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:30:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:30:20,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:30:20,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806902111] [2020-07-21 17:30:20,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:30:20,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 17:30:20,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484449744] [2020-07-21 17:30:20,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 17:30:20,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:30:20,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 17:30:20,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 17:30:20,488 INFO L87 Difference]: Start difference. First operand 80325 states and 126626 transitions. Second operand 8 states. [2020-07-21 17:30:28,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:30:28,324 INFO L93 Difference]: Finished difference Result 119497 states and 188937 transitions. [2020-07-21 17:30:28,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 17:30:28,325 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 332 [2020-07-21 17:30:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:30:28,420 INFO L225 Difference]: With dead ends: 119497 [2020-07-21 17:30:28,420 INFO L226 Difference]: Without dead ends: 82924 [2020-07-21 17:30:28,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 325 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 17:30:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82924 states. [2020-07-21 17:30:30,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82924 to 38329. [2020-07-21 17:30:30,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38329 states. [2020-07-21 17:30:30,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38329 states to 38329 states and 59475 transitions. [2020-07-21 17:30:30,991 INFO L78 Accepts]: Start accepts. Automaton has 38329 states and 59475 transitions. Word has length 332 [2020-07-21 17:30:30,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:30:30,992 INFO L479 AbstractCegarLoop]: Abstraction has 38329 states and 59475 transitions. [2020-07-21 17:30:30,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 17:30:30,992 INFO L276 IsEmpty]: Start isEmpty. Operand 38329 states and 59475 transitions. [2020-07-21 17:30:31,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 17:30:31,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:30:31,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:30:31,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:31,227 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:30:31,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:30:31,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1088493216, now seen corresponding path program 1 times [2020-07-21 17:30:31,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:30:31,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495245966] [2020-07-21 17:30:31,229 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 17:30:31,595 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:30:31,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:30:31,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 2119 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:30:31,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:30:31,658 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 17:30:31,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:30:31,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495245966] [2020-07-21 17:30:31,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:30:31,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:30:31,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254737529] [2020-07-21 17:30:31,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:30:31,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:30:31,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:30:31,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:30:31,660 INFO L87 Difference]: Start difference. First operand 38329 states and 59475 transitions. Second operand 3 states. [2020-07-21 17:30:34,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:30:34,952 INFO L93 Difference]: Finished difference Result 88483 states and 138344 transitions. [2020-07-21 17:30:34,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:30:34,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 17:30:34,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:30:35,009 INFO L225 Difference]: With dead ends: 88483 [2020-07-21 17:30:35,009 INFO L226 Difference]: Without dead ends: 52709 [2020-07-21 17:30:35,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 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 17:30:35,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52709 states. [2020-07-21 17:30:38,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52709 to 49483. [2020-07-21 17:30:38,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49483 states. [2020-07-21 17:30:38,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49483 states to 49483 states and 77221 transitions. [2020-07-21 17:30:38,304 INFO L78 Accepts]: Start accepts. Automaton has 49483 states and 77221 transitions. Word has length 332 [2020-07-21 17:30:38,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:30:38,304 INFO L479 AbstractCegarLoop]: Abstraction has 49483 states and 77221 transitions. [2020-07-21 17:30:38,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:30:38,304 INFO L276 IsEmpty]: Start isEmpty. Operand 49483 states and 77221 transitions. [2020-07-21 17:30:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 17:30:38,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:30:38,318 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, 1, 1, 1, 1] [2020-07-21 17:30:38,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:38,519 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:30:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:30:38,520 INFO L82 PathProgramCache]: Analyzing trace with hash 109236819, now seen corresponding path program 1 times [2020-07-21 17:30:38,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:30:38,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56195446] [2020-07-21 17:30:38,521 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 17:30:38,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:30:38,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:30:38,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:30:38,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:30:38,839 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 17:30:38,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:30:38,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56195446] [2020-07-21 17:30:38,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:30:38,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:30:38,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308782664] [2020-07-21 17:30:38,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:30:38,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:30:38,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:30:38,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:30:38,841 INFO L87 Difference]: Start difference. First operand 49483 states and 77221 transitions. Second operand 4 states. [2020-07-21 17:30:42,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:30:42,106 INFO L93 Difference]: Finished difference Result 72854 states and 113661 transitions. [2020-07-21 17:30:42,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:30:42,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 17:30:42,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:30:42,160 INFO L225 Difference]: With dead ends: 72854 [2020-07-21 17:30:42,160 INFO L226 Difference]: Without dead ends: 49520 [2020-07-21 17:30:42,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:30:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49520 states. [2020-07-21 17:30:46,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49520 to 48740. [2020-07-21 17:30:46,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48740 states. [2020-07-21 17:30:46,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48740 states to 48740 states and 76112 transitions. [2020-07-21 17:30:46,572 INFO L78 Accepts]: Start accepts. Automaton has 48740 states and 76112 transitions. Word has length 332 [2020-07-21 17:30:46,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:30:46,572 INFO L479 AbstractCegarLoop]: Abstraction has 48740 states and 76112 transitions. [2020-07-21 17:30:46,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:30:46,572 INFO L276 IsEmpty]: Start isEmpty. Operand 48740 states and 76112 transitions. [2020-07-21 17:30:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 17:30:46,586 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:30:46,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:30:46,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:46,787 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:30:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:30:46,788 INFO L82 PathProgramCache]: Analyzing trace with hash -940905964, now seen corresponding path program 1 times [2020-07-21 17:30:46,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:30:46,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503358316] [2020-07-21 17:30:46,790 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 17:30:47,035 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:30:47,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:30:47,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:30:47,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:30:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:30:47,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:30:47,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503358316] [2020-07-21 17:30:47,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:30:47,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:30:47,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567862135] [2020-07-21 17:30:47,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:30:47,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:30:47,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:30:47,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:30:47,104 INFO L87 Difference]: Start difference. First operand 48740 states and 76112 transitions. Second operand 3 states. [2020-07-21 17:30:53,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:30:53,182 INFO L93 Difference]: Finished difference Result 145654 states and 227379 transitions. [2020-07-21 17:30:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:30:53,183 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 17:30:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:30:53,290 INFO L225 Difference]: With dead ends: 145654 [2020-07-21 17:30:53,290 INFO L226 Difference]: Without dead ends: 97158 [2020-07-21 17:30:53,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:30:53,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97158 states. [2020-07-21 17:30:57,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97158 to 48823. [2020-07-21 17:30:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48823 states. [2020-07-21 17:30:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48823 states to 48823 states and 76218 transitions. [2020-07-21 17:30:57,079 INFO L78 Accepts]: Start accepts. Automaton has 48823 states and 76218 transitions. Word has length 333 [2020-07-21 17:30:57,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:30:57,080 INFO L479 AbstractCegarLoop]: Abstraction has 48823 states and 76218 transitions. [2020-07-21 17:30:57,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:30:57,080 INFO L276 IsEmpty]: Start isEmpty. Operand 48823 states and 76218 transitions. [2020-07-21 17:30:57,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 17:30:57,094 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:30:57,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:30:57,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:57,295 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:30:57,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:30:57,296 INFO L82 PathProgramCache]: Analyzing trace with hash 351860037, now seen corresponding path program 1 times [2020-07-21 17:30:57,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:30:57,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137437020] [2020-07-21 17:30:57,297 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 17:30:57,550 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:30:57,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:30:57,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:30:57,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:30:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:30:57,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:30:57,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137437020] [2020-07-21 17:30:57,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:30:57,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 17:30:57,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972395579] [2020-07-21 17:30:57,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:30:57,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:30:57,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:30:57,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:30:57,971 INFO L87 Difference]: Start difference. First operand 48823 states and 76218 transitions. Second operand 9 states. [2020-07-21 17:31:17,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:31:17,027 INFO L93 Difference]: Finished difference Result 215349 states and 336270 transitions. [2020-07-21 17:31:17,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-21 17:31:17,027 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 334 [2020-07-21 17:31:17,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:31:17,278 INFO L225 Difference]: With dead ends: 215349 [2020-07-21 17:31:17,278 INFO L226 Difference]: Without dead ends: 204853 [2020-07-21 17:31:17,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 17:31:17,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204853 states. [2020-07-21 17:31:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204853 to 117561. [2020-07-21 17:31:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117561 states. [2020-07-21 17:31:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117561 states to 117561 states and 183650 transitions. [2020-07-21 17:31:27,627 INFO L78 Accepts]: Start accepts. Automaton has 117561 states and 183650 transitions. Word has length 334 [2020-07-21 17:31:27,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:31:27,628 INFO L479 AbstractCegarLoop]: Abstraction has 117561 states and 183650 transitions. [2020-07-21 17:31:27,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:31:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 117561 states and 183650 transitions. [2020-07-21 17:31:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 17:31:27,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:31:27,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:31:27,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:31:27,853 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:31:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:31:27,854 INFO L82 PathProgramCache]: Analyzing trace with hash -739154971, now seen corresponding path program 1 times [2020-07-21 17:31:27,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:31:27,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44803901] [2020-07-21 17:31:27,854 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 17:31:28,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:31:28,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:31:28,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 2122 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:31:28,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:31:28,291 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 17:31:28,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:31:28,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44803901] [2020-07-21 17:31:28,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:31:28,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:31:28,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616611147] [2020-07-21 17:31:28,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:31:28,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:31:28,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:31:28,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:31:28,294 INFO L87 Difference]: Start difference. First operand 117561 states and 183650 transitions. Second operand 3 states. [2020-07-21 17:31:43,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:31:43,538 INFO L93 Difference]: Finished difference Result 287451 states and 453089 transitions. [2020-07-21 17:31:43,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:31:43,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 17:31:43,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:31:43,810 INFO L225 Difference]: With dead ends: 287451 [2020-07-21 17:31:43,811 INFO L226 Difference]: Without dead ends: 172035 [2020-07-21 17:31:44,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:31:44,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172035 states. [2020-07-21 17:31:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172035 to 162421. [2020-07-21 17:31:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162421 states. [2020-07-21 17:31:59,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162421 states to 162421 states and 252861 transitions. [2020-07-21 17:31:59,950 INFO L78 Accepts]: Start accepts. Automaton has 162421 states and 252861 transitions. Word has length 334 [2020-07-21 17:31:59,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:31:59,950 INFO L479 AbstractCegarLoop]: Abstraction has 162421 states and 252861 transitions. [2020-07-21 17:31:59,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:31:59,951 INFO L276 IsEmpty]: Start isEmpty. Operand 162421 states and 252861 transitions. [2020-07-21 17:31:59,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 17:31:59,975 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:31:59,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:00,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:00,176 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:00,177 INFO L82 PathProgramCache]: Analyzing trace with hash -459285393, now seen corresponding path program 1 times [2020-07-21 17:32:00,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:00,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803097939] [2020-07-21 17:32:00,178 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 17:32:00,434 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:32:00,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:00,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:32:00,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:00,489 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 17:32:00,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:00,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803097939] [2020-07-21 17:32:00,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:00,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:32:00,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330522645] [2020-07-21 17:32:00,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:32:00,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:00,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:32:00,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:32:00,491 INFO L87 Difference]: Start difference. First operand 162421 states and 252861 transitions. Second operand 4 states. [2020-07-21 17:32:18,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:18,438 INFO L93 Difference]: Finished difference Result 229858 states and 357937 transitions. [2020-07-21 17:32:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:32:18,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 17:32:18,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:18,711 INFO L225 Difference]: With dead ends: 229858 [2020-07-21 17:32:18,711 INFO L226 Difference]: Without dead ends: 195058 [2020-07-21 17:32:18,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:32:18,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195058 states. [2020-07-21 17:32:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195058 to 162677. [2020-07-21 17:32:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162677 states. [2020-07-21 17:32:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162677 states to 162677 states and 253289 transitions. [2020-07-21 17:32:32,819 INFO L78 Accepts]: Start accepts. Automaton has 162677 states and 253289 transitions. Word has length 334 [2020-07-21 17:32:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:32,819 INFO L479 AbstractCegarLoop]: Abstraction has 162677 states and 253289 transitions. [2020-07-21 17:32:32,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:32:32,819 INFO L276 IsEmpty]: Start isEmpty. Operand 162677 states and 253289 transitions. [2020-07-21 17:32:32,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 17:32:32,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:32,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:33,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:33,048 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:33,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash -190569486, now seen corresponding path program 1 times [2020-07-21 17:32:33,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:33,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828843222] [2020-07-21 17:32:33,050 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:33,417 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:32:33,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:33,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 2124 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:32:33,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:33,601 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 17:32:33,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:33,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828843222] [2020-07-21 17:32:33,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:33,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:32:33,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966993921] [2020-07-21 17:32:33,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:32:33,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:33,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:32:33,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:32:33,603 INFO L87 Difference]: Start difference. First operand 162677 states and 253289 transitions. Second operand 5 states. [2020-07-21 17:33:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:03,097 INFO L93 Difference]: Finished difference Result 464245 states and 725771 transitions. [2020-07-21 17:33:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:33:03,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 335 [2020-07-21 17:33:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:03,557 INFO L225 Difference]: With dead ends: 464245 [2020-07-21 17:33:03,558 INFO L226 Difference]: Without dead ends: 323265 [2020-07-21 17:33:04,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:33:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323265 states. [2020-07-21 17:33:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323265 to 323263. [2020-07-21 17:33:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323263 states. [2020-07-21 17:33:36,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323263 states to 323263 states and 502741 transitions. [2020-07-21 17:33:36,931 INFO L78 Accepts]: Start accepts. Automaton has 323263 states and 502741 transitions. Word has length 335 [2020-07-21 17:33:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:36,931 INFO L479 AbstractCegarLoop]: Abstraction has 323263 states and 502741 transitions. [2020-07-21 17:33:36,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:33:36,931 INFO L276 IsEmpty]: Start isEmpty. Operand 323263 states and 502741 transitions. [2020-07-21 17:33:36,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 17:33:36,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:36,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:37,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:37,182 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:37,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:37,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1616001400, now seen corresponding path program 1 times [2020-07-21 17:33:37,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:37,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768396587] [2020-07-21 17:33:37,183 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:37,424 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:33:37,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:37,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:33:37,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:37,523 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 17:33:37,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:37,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768396587] [2020-07-21 17:33:37,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:37,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:33:37,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819615838] [2020-07-21 17:33:37,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:33:37,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:37,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:33:37,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:37,525 INFO L87 Difference]: Start difference. First operand 323263 states and 502741 transitions. Second operand 3 states. [2020-07-21 17:34:39,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:34:39,660 INFO L93 Difference]: Finished difference Result 917278 states and 1433273 transitions. [2020-07-21 17:34:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:34:39,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 17:34:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:34:40,662 INFO L225 Difference]: With dead ends: 917278 [2020-07-21 17:34:40,663 INFO L226 Difference]: Without dead ends: 634423 [2020-07-21 17:34:40,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 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 17:34:41,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634423 states. [2020-07-21 17:35:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634423 to 634421. [2020-07-21 17:35:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634421 states. [2020-07-21 17:35:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634421 states to 634421 states and 986619 transitions. [2020-07-21 17:35:53,091 INFO L78 Accepts]: Start accepts. Automaton has 634421 states and 986619 transitions. Word has length 335 [2020-07-21 17:35:53,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:35:53,091 INFO L479 AbstractCegarLoop]: Abstraction has 634421 states and 986619 transitions. [2020-07-21 17:35:53,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:35:53,091 INFO L276 IsEmpty]: Start isEmpty. Operand 634421 states and 986619 transitions. [2020-07-21 17:35:53,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 17:35:53,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:35:53,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:35:53,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:35:53,376 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:35:53,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:35:53,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1221126195, now seen corresponding path program 1 times [2020-07-21 17:35:53,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:35:53,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918018247] [2020-07-21 17:35:53,378 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:35:53,781 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:35:53,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:35:53,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 2125 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:35:53,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:35:53,889 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 17:35:53,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:35:53,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918018247] [2020-07-21 17:35:53,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:35:53,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:35:53,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644935264] [2020-07-21 17:35:53,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:35:53,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:35:53,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:35:53,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:35:53,891 INFO L87 Difference]: Start difference. First operand 634421 states and 986619 transitions. Second operand 4 states. [2020-07-21 17:38:08,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:38:08,038 INFO L93 Difference]: Finished difference Result 1880368 states and 2924443 transitions. [2020-07-21 17:38:08,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:38:08,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-21 17:38:08,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:38:10,039 INFO L225 Difference]: With dead ends: 1880368 [2020-07-21 17:38:10,040 INFO L226 Difference]: Without dead ends: 1246048 [2020-07-21 17:38:11,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 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 17:38:11,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246048 states.