/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:52:14,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:52:14,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:52:14,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:52:14,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:52:14,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:52:14,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:52:14,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:52:14,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:52:14,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:52:14,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:52:14,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:52:14,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:52:14,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:52:14,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:52:14,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:52:14,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:52:14,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:52:14,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:52:14,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:52:14,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:52:14,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:52:14,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:52:14,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:52:14,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:52:14,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 23:52:14,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 23:52:14,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 23:52:14,428 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 23:52:14,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 23:52:14,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 23:52:14,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 23:52:14,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 23:52:14,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:52:14,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:52:14,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:52:14,433 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 23:52:14,447 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:52:14,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:52:14,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:52:14,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:52:14,449 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:52:14,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:52:14,450 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:52:14,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:52:14,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:52:14,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:52:14,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:52:14,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:52:14,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:52:14,451 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:52:14,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:52:14,451 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:52:14,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:52:14,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:52:14,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:52:14,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:52:14,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:52:14,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:52:14,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:52:14,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:52:14,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:52:14,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:52:14,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:14,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:52:14,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:52:14,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:52:14,733 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:52:14,746 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:52:14,749 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:52:14,750 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:52:14,751 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:52:14,752 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 23:52:14,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87948c14f/01006b1fd2b54bf693a7037c09d37432/FLAG3b4785dc6 [2020-07-21 23:52:15,458 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:52:15,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 23:52:15,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87948c14f/01006b1fd2b54bf693a7037c09d37432/FLAG3b4785dc6 [2020-07-21 23:52:15,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87948c14f/01006b1fd2b54bf693a7037c09d37432 [2020-07-21 23:52:15,669 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:52:15,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:52:15,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:52:15,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:52:15,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:52:15,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:52:15" (1/1) ... [2020-07-21 23:52:15,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a47a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:52:15, skipping insertion in model container [2020-07-21 23:52:15,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:52:15" (1/1) ... [2020-07-21 23:52:15,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:52:15,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:52:16,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:52:16,834 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:52:17,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:52:17,353 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:52:17,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:52:17 WrapperNode [2020-07-21 23:52:17,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:52:17,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:52:17,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:52:17,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:52:17,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:52:17" (1/1) ... [2020-07-21 23:52:17,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:52:17" (1/1) ... [2020-07-21 23:52:17,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:52:17" (1/1) ... [2020-07-21 23:52:17,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:52:17" (1/1) ... [2020-07-21 23:52:17,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:52:17" (1/1) ... [2020-07-21 23:52:17,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:52:17" (1/1) ... [2020-07-21 23:52:17,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:52:17" (1/1) ... [2020-07-21 23:52:17,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:52:17,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:52:17,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:52:17,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:52:17,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:52:17" (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 23:52:17,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:52:17,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:52:17,587 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:52:17,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:52:17,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:52:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 23:52:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 23:52:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 23:52:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:52:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:52:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 23:52:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 23:52:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 23:52:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 23:52:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 23:52:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 23:52:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 23:52:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 23:52:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:52:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:52:17,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:52:20,005 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:52:20,005 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 23:52:20,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:52:20 BoogieIcfgContainer [2020-07-21 23:52:20,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:52:20,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:52:20,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:52:20,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:52:20,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:52:15" (1/3) ... [2020-07-21 23:52:20,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a97567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:52:20, skipping insertion in model container [2020-07-21 23:52:20,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:52:17" (2/3) ... [2020-07-21 23:52:20,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a97567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:52:20, skipping insertion in model container [2020-07-21 23:52:20,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:52:20" (3/3) ... [2020-07-21 23:52:20,024 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 23:52:20,034 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:52:20,043 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:52:20,058 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:52:20,085 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:52:20,086 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:52:20,086 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:52:20,086 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:52:20,086 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:52:20,086 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:52:20,087 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:52:20,087 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:52:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-21 23:52:20,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 23:52:20,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:20,156 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 23:52:20,156 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:20,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:20,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-21 23:52:20,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:20,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921685653] [2020-07-21 23:52:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:20,657 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:52:20,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:20,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:52:20,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:52:21,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:21,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921685653] [2020-07-21 23:52:21,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:21,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:52:21,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554683215] [2020-07-21 23:52:21,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:52:21,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:21,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:52:21,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:52:21,063 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-21 23:52:21,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:21,363 INFO L93 Difference]: Finished difference Result 2303 states and 4091 transitions. [2020-07-21 23:52:21,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:52:21,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-21 23:52:21,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:21,395 INFO L225 Difference]: With dead ends: 2303 [2020-07-21 23:52:21,395 INFO L226 Difference]: Without dead ends: 1529 [2020-07-21 23:52:21,403 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 23:52:21,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2020-07-21 23:52:21,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1527. [2020-07-21 23:52:21,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1527 states. [2020-07-21 23:52:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2371 transitions. [2020-07-21 23:52:21,544 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2371 transitions. Word has length 324 [2020-07-21 23:52:21,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:21,545 INFO L479 AbstractCegarLoop]: Abstraction has 1527 states and 2371 transitions. [2020-07-21 23:52:21,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:52:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2371 transitions. [2020-07-21 23:52:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 23:52:21,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:21,556 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 23:52:21,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:21,770 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:21,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:21,771 INFO L82 PathProgramCache]: Analyzing trace with hash -348485848, now seen corresponding path program 1 times [2020-07-21 23:52:21,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:21,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227966419] [2020-07-21 23:52:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:22,114 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:52:22,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:22,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:22,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:22,282 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 23:52:22,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:22,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227966419] [2020-07-21 23:52:22,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:22,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:22,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080306203] [2020-07-21 23:52:22,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:22,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:22,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:22,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:22,287 INFO L87 Difference]: Start difference. First operand 1527 states and 2371 transitions. Second operand 3 states. [2020-07-21 23:52:22,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:22,456 INFO L93 Difference]: Finished difference Result 4375 states and 6762 transitions. [2020-07-21 23:52:22,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:22,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 23:52:22,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:22,472 INFO L225 Difference]: With dead ends: 4375 [2020-07-21 23:52:22,473 INFO L226 Difference]: Without dead ends: 2935 [2020-07-21 23:52:22,477 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 23:52:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2020-07-21 23:52:22,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 2933. [2020-07-21 23:52:22,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2933 states. [2020-07-21 23:52:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 4519 transitions. [2020-07-21 23:52:22,589 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 4519 transitions. Word has length 326 [2020-07-21 23:52:22,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:22,590 INFO L479 AbstractCegarLoop]: Abstraction has 2933 states and 4519 transitions. [2020-07-21 23:52:22,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:22,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 4519 transitions. [2020-07-21 23:52:22,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 23:52:22,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:22,600 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 23:52:22,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:22,815 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:22,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1549040403, now seen corresponding path program 1 times [2020-07-21 23:52:22,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:22,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283167450] [2020-07-21 23:52:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:23,135 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:23,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:23,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:23,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:23,217 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 23:52:23,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:23,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283167450] [2020-07-21 23:52:23,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:23,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:23,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214231035] [2020-07-21 23:52:23,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:23,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:23,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:23,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:23,221 INFO L87 Difference]: Start difference. First operand 2933 states and 4519 transitions. Second operand 3 states. [2020-07-21 23:52:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:23,412 INFO L93 Difference]: Finished difference Result 8702 states and 13391 transitions. [2020-07-21 23:52:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:23,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 23:52:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:23,440 INFO L225 Difference]: With dead ends: 8702 [2020-07-21 23:52:23,440 INFO L226 Difference]: Without dead ends: 5811 [2020-07-21 23:52:23,448 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 23:52:23,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2020-07-21 23:52:23,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 2943. [2020-07-21 23:52:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2943 states. [2020-07-21 23:52:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 4533 transitions. [2020-07-21 23:52:23,645 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 4533 transitions. Word has length 326 [2020-07-21 23:52:23,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:23,646 INFO L479 AbstractCegarLoop]: Abstraction has 2943 states and 4533 transitions. [2020-07-21 23:52:23,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 4533 transitions. [2020-07-21 23:52:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 23:52:23,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:23,657 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 23:52:23,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:23,872 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:23,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1589385571, now seen corresponding path program 1 times [2020-07-21 23:52:23,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:23,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819463278] [2020-07-21 23:52:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:24,133 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:24,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:24,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:24,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:24,212 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 23:52:24,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:24,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819463278] [2020-07-21 23:52:24,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:24,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:24,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203163120] [2020-07-21 23:52:24,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:24,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:24,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:24,215 INFO L87 Difference]: Start difference. First operand 2943 states and 4533 transitions. Second operand 3 states. [2020-07-21 23:52:24,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:24,437 INFO L93 Difference]: Finished difference Result 8739 states and 13451 transitions. [2020-07-21 23:52:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:24,438 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 23:52:24,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:24,466 INFO L225 Difference]: With dead ends: 8739 [2020-07-21 23:52:24,466 INFO L226 Difference]: Without dead ends: 5840 [2020-07-21 23:52:24,475 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 23:52:24,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5840 states. [2020-07-21 23:52:24,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5840 to 2958. [2020-07-21 23:52:24,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2958 states. [2020-07-21 23:52:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2958 states to 2958 states and 4554 transitions. [2020-07-21 23:52:24,692 INFO L78 Accepts]: Start accepts. Automaton has 2958 states and 4554 transitions. Word has length 327 [2020-07-21 23:52:24,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:24,692 INFO L479 AbstractCegarLoop]: Abstraction has 2958 states and 4554 transitions. [2020-07-21 23:52:24,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:24,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2958 states and 4554 transitions. [2020-07-21 23:52:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 23:52:24,700 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:24,701 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 23:52:24,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:24,916 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:24,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:24,917 INFO L82 PathProgramCache]: Analyzing trace with hash -326688029, now seen corresponding path program 1 times [2020-07-21 23:52:24,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:24,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346266080] [2020-07-21 23:52:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:25,157 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:25,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:25,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:52:25,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:25,243 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 23:52:25,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:25,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346266080] [2020-07-21 23:52:25,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:25,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:52:25,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100811852] [2020-07-21 23:52:25,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:52:25,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:25,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:52:25,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:52:25,246 INFO L87 Difference]: Start difference. First operand 2958 states and 4554 transitions. Second operand 4 states. [2020-07-21 23:52:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:25,549 INFO L93 Difference]: Finished difference Result 6298 states and 9706 transitions. [2020-07-21 23:52:25,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:52:25,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-21 23:52:25,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:25,565 INFO L225 Difference]: With dead ends: 6298 [2020-07-21 23:52:25,565 INFO L226 Difference]: Without dead ends: 3357 [2020-07-21 23:52:25,575 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 23:52:25,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2020-07-21 23:52:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 3025. [2020-07-21 23:52:25,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3025 states. [2020-07-21 23:52:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 4661 transitions. [2020-07-21 23:52:25,715 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 4661 transitions. Word has length 328 [2020-07-21 23:52:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:25,715 INFO L479 AbstractCegarLoop]: Abstraction has 3025 states and 4661 transitions. [2020-07-21 23:52:25,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:52:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 4661 transitions. [2020-07-21 23:52:25,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 23:52:25,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:25,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:52:25,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:25,939 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:25,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1639482187, now seen corresponding path program 1 times [2020-07-21 23:52:25,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:25,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533515206] [2020-07-21 23:52:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:26,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:26,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:26,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:26,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:26,262 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 23:52:26,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:26,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533515206] [2020-07-21 23:52:26,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:26,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:26,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172957683] [2020-07-21 23:52:26,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:26,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:26,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:26,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:26,265 INFO L87 Difference]: Start difference. First operand 3025 states and 4661 transitions. Second operand 3 states. [2020-07-21 23:52:26,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:26,530 INFO L93 Difference]: Finished difference Result 9029 states and 13912 transitions. [2020-07-21 23:52:26,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:26,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 23:52:26,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:26,560 INFO L225 Difference]: With dead ends: 9029 [2020-07-21 23:52:26,561 INFO L226 Difference]: Without dead ends: 6024 [2020-07-21 23:52:26,570 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 23:52:26,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6024 states. [2020-07-21 23:52:26,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6024 to 3032. [2020-07-21 23:52:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3032 states. [2020-07-21 23:52:26,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 4671 transitions. [2020-07-21 23:52:26,838 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 4671 transitions. Word has length 330 [2020-07-21 23:52:26,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:26,838 INFO L479 AbstractCegarLoop]: Abstraction has 3032 states and 4671 transitions. [2020-07-21 23:52:26,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 4671 transitions. [2020-07-21 23:52:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 23:52:26,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:26,848 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 23:52:27,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:27,061 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:27,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:27,061 INFO L82 PathProgramCache]: Analyzing trace with hash -920947079, now seen corresponding path program 1 times [2020-07-21 23:52:27,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:27,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977197507] [2020-07-21 23:52:27,062 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:27,306 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:27,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:27,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:27,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:27,390 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 23:52:27,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:27,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977197507] [2020-07-21 23:52:27,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:27,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:27,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334638478] [2020-07-21 23:52:27,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:27,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:27,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:27,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:27,394 INFO L87 Difference]: Start difference. First operand 3032 states and 4671 transitions. Second operand 3 states. [2020-07-21 23:52:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:27,634 INFO L93 Difference]: Finished difference Result 9057 states and 13954 transitions. [2020-07-21 23:52:27,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:27,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-21 23:52:27,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:27,652 INFO L225 Difference]: With dead ends: 9057 [2020-07-21 23:52:27,652 INFO L226 Difference]: Without dead ends: 6043 [2020-07-21 23:52:27,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 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 23:52:27,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6043 states. [2020-07-21 23:52:27,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6043 to 3046. [2020-07-21 23:52:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3046 states. [2020-07-21 23:52:27,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 4691 transitions. [2020-07-21 23:52:27,888 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 4691 transitions. Word has length 331 [2020-07-21 23:52:27,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:27,889 INFO L479 AbstractCegarLoop]: Abstraction has 3046 states and 4691 transitions. [2020-07-21 23:52:27,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:27,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 4691 transitions. [2020-07-21 23:52:27,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 23:52:27,897 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:27,898 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 23:52:28,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:28,112 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:28,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:28,113 INFO L82 PathProgramCache]: Analyzing trace with hash 937671629, now seen corresponding path program 1 times [2020-07-21 23:52:28,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:28,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712404676] [2020-07-21 23:52:28,114 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:28,399 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:52:28,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:28,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:28,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:28,467 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 23:52:28,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:28,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712404676] [2020-07-21 23:52:28,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:28,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:28,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610228461] [2020-07-21 23:52:28,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:28,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:28,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:28,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:28,470 INFO L87 Difference]: Start difference. First operand 3046 states and 4691 transitions. Second operand 3 states. [2020-07-21 23:52:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:28,721 INFO L93 Difference]: Finished difference Result 6478 states and 10021 transitions. [2020-07-21 23:52:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:28,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 23:52:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:28,733 INFO L225 Difference]: With dead ends: 6478 [2020-07-21 23:52:28,734 INFO L226 Difference]: Without dead ends: 4240 [2020-07-21 23:52:28,740 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 23:52:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2020-07-21 23:52:28,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 3550. [2020-07-21 23:52:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3550 states. [2020-07-21 23:52:28,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 5519 transitions. [2020-07-21 23:52:28,911 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 5519 transitions. Word has length 332 [2020-07-21 23:52:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:28,912 INFO L479 AbstractCegarLoop]: Abstraction has 3550 states and 5519 transitions. [2020-07-21 23:52:28,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:28,912 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 5519 transitions. [2020-07-21 23:52:28,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 23:52:28,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:28,919 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 23:52:29,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:29,135 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:29,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:29,135 INFO L82 PathProgramCache]: Analyzing trace with hash 960357788, now seen corresponding path program 1 times [2020-07-21 23:52:29,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:29,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954498434] [2020-07-21 23:52:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:29,471 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:52:29,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:29,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:52:29,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:29,750 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 23:52:29,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:29,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954498434] [2020-07-21 23:52:29,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:29,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 23:52:29,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673997577] [2020-07-21 23:52:29,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:52:29,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:29,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:52:29,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:52:29,756 INFO L87 Difference]: Start difference. First operand 3550 states and 5519 transitions. Second operand 8 states. [2020-07-21 23:52:31,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:31,675 INFO L93 Difference]: Finished difference Result 10083 states and 15833 transitions. [2020-07-21 23:52:31,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 23:52:31,676 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 332 [2020-07-21 23:52:31,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:31,694 INFO L225 Difference]: With dead ends: 10083 [2020-07-21 23:52:31,694 INFO L226 Difference]: Without dead ends: 7565 [2020-07-21 23:52:31,702 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 23:52:31,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7565 states. [2020-07-21 23:52:32,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7565 to 4923. [2020-07-21 23:52:32,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4923 states. [2020-07-21 23:52:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4923 states to 4923 states and 7615 transitions. [2020-07-21 23:52:32,031 INFO L78 Accepts]: Start accepts. Automaton has 4923 states and 7615 transitions. Word has length 332 [2020-07-21 23:52:32,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:32,032 INFO L479 AbstractCegarLoop]: Abstraction has 4923 states and 7615 transitions. [2020-07-21 23:52:32,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:52:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4923 states and 7615 transitions. [2020-07-21 23:52:32,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 23:52:32,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:32,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:52:32,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:32,255 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:32,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:32,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1088493216, now seen corresponding path program 1 times [2020-07-21 23:52:32,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:32,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313838596] [2020-07-21 23:52:32,257 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:32,557 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:52:32,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:32,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:32,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:32,624 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 23:52:32,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:32,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313838596] [2020-07-21 23:52:32,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:32,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:32,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727847470] [2020-07-21 23:52:32,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:32,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:32,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:32,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:32,626 INFO L87 Difference]: Start difference. First operand 4923 states and 7615 transitions. Second operand 3 states. [2020-07-21 23:52:33,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:33,014 INFO L93 Difference]: Finished difference Result 10195 states and 15902 transitions. [2020-07-21 23:52:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:33,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 23:52:33,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:33,031 INFO L225 Difference]: With dead ends: 10195 [2020-07-21 23:52:33,031 INFO L226 Difference]: Without dead ends: 6154 [2020-07-21 23:52:33,039 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 23:52:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6154 states. [2020-07-21 23:52:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6154 to 5800. [2020-07-21 23:52:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5800 states. [2020-07-21 23:52:33,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5800 states to 5800 states and 9056 transitions. [2020-07-21 23:52:33,403 INFO L78 Accepts]: Start accepts. Automaton has 5800 states and 9056 transitions. Word has length 332 [2020-07-21 23:52:33,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:33,404 INFO L479 AbstractCegarLoop]: Abstraction has 5800 states and 9056 transitions. [2020-07-21 23:52:33,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:33,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5800 states and 9056 transitions. [2020-07-21 23:52:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 23:52:33,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:33,412 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 23:52:33,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:33,626 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:33,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:33,627 INFO L82 PathProgramCache]: Analyzing trace with hash -276487765, now seen corresponding path program 1 times [2020-07-21 23:52:33,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:33,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18149776] [2020-07-21 23:52:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:33,905 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:52:33,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:33,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:33,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:34,017 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 23:52:34,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:34,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18149776] [2020-07-21 23:52:34,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:34,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:34,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297053801] [2020-07-21 23:52:34,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:34,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:34,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:34,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:34,020 INFO L87 Difference]: Start difference. First operand 5800 states and 9056 transitions. Second operand 3 states. [2020-07-21 23:52:34,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:34,595 INFO L93 Difference]: Finished difference Result 16770 states and 26142 transitions. [2020-07-21 23:52:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:34,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 23:52:34,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:34,619 INFO L225 Difference]: With dead ends: 16770 [2020-07-21 23:52:34,620 INFO L226 Difference]: Without dead ends: 11208 [2020-07-21 23:52:34,632 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 23:52:34,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2020-07-21 23:52:35,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 11206. [2020-07-21 23:52:35,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11206 states. [2020-07-21 23:52:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11206 states to 11206 states and 17386 transitions. [2020-07-21 23:52:35,252 INFO L78 Accepts]: Start accepts. Automaton has 11206 states and 17386 transitions. Word has length 332 [2020-07-21 23:52:35,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:35,253 INFO L479 AbstractCegarLoop]: Abstraction has 11206 states and 17386 transitions. [2020-07-21 23:52:35,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 11206 states and 17386 transitions. [2020-07-21 23:52:35,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 23:52:35,267 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:35,268 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 23:52:35,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:35,481 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:35,482 INFO L82 PathProgramCache]: Analyzing trace with hash -485032027, now seen corresponding path program 1 times [2020-07-21 23:52:35,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:35,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257621780] [2020-07-21 23:52:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:35,833 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:35,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:35,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:52:35,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:35,915 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 23:52:35,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:35,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257621780] [2020-07-21 23:52:35,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:35,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:52:35,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925883039] [2020-07-21 23:52:35,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:52:35,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:35,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:52:35,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:52:35,918 INFO L87 Difference]: Start difference. First operand 11206 states and 17386 transitions. Second operand 4 states. [2020-07-21 23:52:37,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:37,318 INFO L93 Difference]: Finished difference Result 31817 states and 49237 transitions. [2020-07-21 23:52:37,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:52:37,318 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 23:52:37,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:37,359 INFO L225 Difference]: With dead ends: 31817 [2020-07-21 23:52:37,359 INFO L226 Difference]: Without dead ends: 21128 [2020-07-21 23:52:37,380 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 23:52:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21128 states. [2020-07-21 23:52:38,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21128 to 11450. [2020-07-21 23:52:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11450 states. [2020-07-21 23:52:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11450 states to 11450 states and 17800 transitions. [2020-07-21 23:52:38,085 INFO L78 Accepts]: Start accepts. Automaton has 11450 states and 17800 transitions. Word has length 332 [2020-07-21 23:52:38,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:38,085 INFO L479 AbstractCegarLoop]: Abstraction has 11450 states and 17800 transitions. [2020-07-21 23:52:38,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:52:38,086 INFO L276 IsEmpty]: Start isEmpty. Operand 11450 states and 17800 transitions. [2020-07-21 23:52:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 23:52:38,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:38,097 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 23:52:38,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:38,307 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:38,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:38,308 INFO L82 PathProgramCache]: Analyzing trace with hash -815790061, now seen corresponding path program 1 times [2020-07-21 23:52:38,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:38,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110931199] [2020-07-21 23:52:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:38,563 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:38,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:38,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:38,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:38,649 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 23:52:38,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:38,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110931199] [2020-07-21 23:52:38,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:38,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:38,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337293726] [2020-07-21 23:52:38,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:38,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:38,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:38,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:38,651 INFO L87 Difference]: Start difference. First operand 11450 states and 17800 transitions. Second operand 3 states. [2020-07-21 23:52:39,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:39,664 INFO L93 Difference]: Finished difference Result 32834 states and 50774 transitions. [2020-07-21 23:52:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:39,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 23:52:39,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:39,704 INFO L225 Difference]: With dead ends: 32834 [2020-07-21 23:52:39,704 INFO L226 Difference]: Without dead ends: 22155 [2020-07-21 23:52:39,730 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 23:52:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22155 states. [2020-07-21 23:52:41,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22155 to 11549. [2020-07-21 23:52:41,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11549 states. [2020-07-21 23:52:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11549 states to 11549 states and 17934 transitions. [2020-07-21 23:52:41,217 INFO L78 Accepts]: Start accepts. Automaton has 11549 states and 17934 transitions. Word has length 334 [2020-07-21 23:52:41,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:41,217 INFO L479 AbstractCegarLoop]: Abstraction has 11549 states and 17934 transitions. [2020-07-21 23:52:41,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:41,217 INFO L276 IsEmpty]: Start isEmpty. Operand 11549 states and 17934 transitions. [2020-07-21 23:52:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 23:52:41,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:41,226 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 23:52:41,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:41,432 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:41,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:41,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1417835857, now seen corresponding path program 1 times [2020-07-21 23:52:41,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:41,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484854922] [2020-07-21 23:52:41,434 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:41,721 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:52:41,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:41,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 1483 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:52:41,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:41,844 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 23:52:41,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:41,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484854922] [2020-07-21 23:52:41,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:41,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:52:41,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540669247] [2020-07-21 23:52:41,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:52:41,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:41,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:52:41,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:52:41,847 INFO L87 Difference]: Start difference. First operand 11549 states and 17934 transitions. Second operand 5 states. [2020-07-21 23:52:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:42,940 INFO L93 Difference]: Finished difference Result 21275 states and 33033 transitions. [2020-07-21 23:52:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:52:42,941 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 335 [2020-07-21 23:52:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:42,958 INFO L225 Difference]: With dead ends: 21275 [2020-07-21 23:52:42,958 INFO L226 Difference]: Without dead ends: 11549 [2020-07-21 23:52:42,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:52:42,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11549 states. [2020-07-21 23:52:43,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11549 to 11549. [2020-07-21 23:52:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11549 states. [2020-07-21 23:52:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11549 states to 11549 states and 17824 transitions. [2020-07-21 23:52:43,675 INFO L78 Accepts]: Start accepts. Automaton has 11549 states and 17824 transitions. Word has length 335 [2020-07-21 23:52:43,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:43,675 INFO L479 AbstractCegarLoop]: Abstraction has 11549 states and 17824 transitions. [2020-07-21 23:52:43,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:52:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 11549 states and 17824 transitions. [2020-07-21 23:52:43,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 23:52:43,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:43,684 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 23:52:43,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:43,890 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:43,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:43,891 INFO L82 PathProgramCache]: Analyzing trace with hash 387279148, now seen corresponding path program 1 times [2020-07-21 23:52:43,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:43,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181667717] [2020-07-21 23:52:43,892 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:44,190 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:52:44,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:44,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:52:44,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:44,278 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 23:52:44,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:44,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181667717] [2020-07-21 23:52:44,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:44,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:52:44,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415323438] [2020-07-21 23:52:44,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:52:44,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:44,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:52:44,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:52:44,281 INFO L87 Difference]: Start difference. First operand 11549 states and 17824 transitions. Second operand 4 states. [2020-07-21 23:52:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:45,543 INFO L93 Difference]: Finished difference Result 33912 states and 52317 transitions. [2020-07-21 23:52:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:52:45,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-21 23:52:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:45,569 INFO L225 Difference]: With dead ends: 33912 [2020-07-21 23:52:45,569 INFO L226 Difference]: Without dead ends: 22534 [2020-07-21 23:52:45,585 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 23:52:45,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2020-07-21 23:52:46,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22532. [2020-07-21 23:52:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22532 states. [2020-07-21 23:52:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22532 states to 22532 states and 34549 transitions. [2020-07-21 23:52:46,960 INFO L78 Accepts]: Start accepts. Automaton has 22532 states and 34549 transitions. Word has length 335 [2020-07-21 23:52:46,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:46,960 INFO L479 AbstractCegarLoop]: Abstraction has 22532 states and 34549 transitions. [2020-07-21 23:52:46,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:52:46,961 INFO L276 IsEmpty]: Start isEmpty. Operand 22532 states and 34549 transitions. [2020-07-21 23:52:46,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 23:52:46,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:46,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:52:47,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:47,177 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:47,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:47,178 INFO L82 PathProgramCache]: Analyzing trace with hash 941612388, now seen corresponding path program 1 times [2020-07-21 23:52:47,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:47,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850180871] [2020-07-21 23:52:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:47,442 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:47,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:47,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:47,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:47,496 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 23:52:47,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:47,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850180871] [2020-07-21 23:52:47,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:47,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:47,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116651757] [2020-07-21 23:52:47,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:47,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:47,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:47,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:47,499 INFO L87 Difference]: Start difference. First operand 22532 states and 34549 transitions. Second operand 3 states. [2020-07-21 23:52:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:50,538 INFO L93 Difference]: Finished difference Result 64786 states and 98879 transitions. [2020-07-21 23:52:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:50,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 23:52:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:50,579 INFO L225 Difference]: With dead ends: 64786 [2020-07-21 23:52:50,580 INFO L226 Difference]: Without dead ends: 43632 [2020-07-21 23:52:50,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 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 23:52:50,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43632 states. [2020-07-21 23:52:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43632 to 22748. [2020-07-21 23:52:51,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22748 states. [2020-07-21 23:52:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22748 states to 22748 states and 34830 transitions. [2020-07-21 23:52:51,954 INFO L78 Accepts]: Start accepts. Automaton has 22748 states and 34830 transitions. Word has length 336 [2020-07-21 23:52:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:51,954 INFO L479 AbstractCegarLoop]: Abstraction has 22748 states and 34830 transitions. [2020-07-21 23:52:51,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 22748 states and 34830 transitions. [2020-07-21 23:52:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 23:52:51,968 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:51,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:52:52,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:52,300 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:52,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:52,301 INFO L82 PathProgramCache]: Analyzing trace with hash 943899740, now seen corresponding path program 1 times [2020-07-21 23:52:52,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:52,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187931471] [2020-07-21 23:52:52,302 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:52,588 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:52:52,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:52,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1487 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:52,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:52,719 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 23:52:52,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:52,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187931471] [2020-07-21 23:52:52,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:52,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:52,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200674737] [2020-07-21 23:52:52,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:52,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:52,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:52,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:52,732 INFO L87 Difference]: Start difference. First operand 22748 states and 34830 transitions. Second operand 3 states. [2020-07-21 23:52:55,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:55,336 INFO L93 Difference]: Finished difference Result 66265 states and 101191 transitions. [2020-07-21 23:52:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:55,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-21 23:52:55,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:55,383 INFO L225 Difference]: With dead ends: 66265 [2020-07-21 23:52:55,384 INFO L226 Difference]: Without dead ends: 44623 [2020-07-21 23:52:55,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 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 23:52:55,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44623 states. [2020-07-21 23:52:58,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44623 to 44621. [2020-07-21 23:52:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44621 states. [2020-07-21 23:52:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44621 states to 44621 states and 67842 transitions. [2020-07-21 23:52:58,915 INFO L78 Accepts]: Start accepts. Automaton has 44621 states and 67842 transitions. Word has length 337 [2020-07-21 23:52:58,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:58,915 INFO L479 AbstractCegarLoop]: Abstraction has 44621 states and 67842 transitions. [2020-07-21 23:52:58,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 44621 states and 67842 transitions. [2020-07-21 23:52:58,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 23:52:58,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:58,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:52:59,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:59,142 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:59,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:59,142 INFO L82 PathProgramCache]: Analyzing trace with hash -76537344, now seen corresponding path program 1 times [2020-07-21 23:52:59,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:59,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059484134] [2020-07-21 23:52:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:59,395 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:59,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:59,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:52:59,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:59,454 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 23:52:59,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:59,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059484134] [2020-07-21 23:52:59,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:59,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:52:59,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034833295] [2020-07-21 23:52:59,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:52:59,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:52:59,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:52:59,457 INFO L87 Difference]: Start difference. First operand 44621 states and 67842 transitions. Second operand 4 states. [2020-07-21 23:53:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:04,602 INFO L93 Difference]: Finished difference Result 130210 states and 197637 transitions. [2020-07-21 23:53:04,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:53:04,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 23:53:04,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:04,701 INFO L225 Difference]: With dead ends: 130210 [2020-07-21 23:53:04,701 INFO L226 Difference]: Without dead ends: 88718 [2020-07-21 23:53:04,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 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 23:53:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88718 states. [2020-07-21 23:53:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88718 to 47676. [2020-07-21 23:53:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47676 states. [2020-07-21 23:53:09,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47676 states to 47676 states and 72745 transitions. [2020-07-21 23:53:09,497 INFO L78 Accepts]: Start accepts. Automaton has 47676 states and 72745 transitions. Word has length 338 [2020-07-21 23:53:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:09,498 INFO L479 AbstractCegarLoop]: Abstraction has 47676 states and 72745 transitions. [2020-07-21 23:53:09,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:53:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 47676 states and 72745 transitions. [2020-07-21 23:53:09,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 23:53:09,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:09,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:09,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:09,743 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:09,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1346166825, now seen corresponding path program 1 times [2020-07-21 23:53:09,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:09,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495567256] [2020-07-21 23:53:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:53:09,997 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:53:09,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:10,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:53:10,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:10,260 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 23:53:10,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:10,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495567256] [2020-07-21 23:53:10,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:10,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:53:10,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987200394] [2020-07-21 23:53:10,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:53:10,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:10,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:53:10,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:10,266 INFO L87 Difference]: Start difference. First operand 47676 states and 72745 transitions. Second operand 3 states. [2020-07-21 23:53:14,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:14,359 INFO L93 Difference]: Finished difference Result 91758 states and 139339 transitions. [2020-07-21 23:53:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:53:14,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-21 23:53:14,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:14,427 INFO L225 Difference]: With dead ends: 91758 [2020-07-21 23:53:14,427 INFO L226 Difference]: Without dead ends: 69260 [2020-07-21 23:53:14,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 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 23:53:14,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69260 states. [2020-07-21 23:53:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69260 to 47676. [2020-07-21 23:53:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47676 states. [2020-07-21 23:53:19,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47676 states to 47676 states and 72738 transitions. [2020-07-21 23:53:19,038 INFO L78 Accepts]: Start accepts. Automaton has 47676 states and 72738 transitions. Word has length 338 [2020-07-21 23:53:19,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:19,038 INFO L479 AbstractCegarLoop]: Abstraction has 47676 states and 72738 transitions. [2020-07-21 23:53:19,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:53:19,038 INFO L276 IsEmpty]: Start isEmpty. Operand 47676 states and 72738 transitions. [2020-07-21 23:53:19,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 23:53:19,067 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:19,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:19,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:19,281 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:19,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:19,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1790781151, now seen corresponding path program 1 times [2020-07-21 23:53:19,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:19,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221092326] [2020-07-21 23:53:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:19,540 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:53:19,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:19,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:53:19,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:19,598 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 23:53:19,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:19,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221092326] [2020-07-21 23:53:19,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:19,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:53:19,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711930195] [2020-07-21 23:53:19,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:53:19,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:19,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:53:19,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:53:19,600 INFO L87 Difference]: Start difference. First operand 47676 states and 72738 transitions. Second operand 4 states. [2020-07-21 23:53:25,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:25,075 INFO L93 Difference]: Finished difference Result 128367 states and 194760 transitions. [2020-07-21 23:53:25,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:53:25,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 23:53:25,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:25,184 INFO L225 Difference]: With dead ends: 128367 [2020-07-21 23:53:25,184 INFO L226 Difference]: Without dead ends: 86453 [2020-07-21 23:53:25,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 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 23:53:25,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86453 states. [2020-07-21 23:53:28,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86453 to 50226. [2020-07-21 23:53:28,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50226 states. [2020-07-21 23:53:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50226 states to 50226 states and 76627 transitions. [2020-07-21 23:53:28,982 INFO L78 Accepts]: Start accepts. Automaton has 50226 states and 76627 transitions. Word has length 338 [2020-07-21 23:53:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:28,983 INFO L479 AbstractCegarLoop]: Abstraction has 50226 states and 76627 transitions. [2020-07-21 23:53:28,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:53:28,983 INFO L276 IsEmpty]: Start isEmpty. Operand 50226 states and 76627 transitions. [2020-07-21 23:53:29,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 23:53:29,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:29,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:29,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:29,209 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:29,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:29,210 INFO L82 PathProgramCache]: Analyzing trace with hash -2145516863, now seen corresponding path program 1 times [2020-07-21 23:53:29,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:29,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112921811] [2020-07-21 23:53:29,211 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:29,459 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:53:29,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:29,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:53:29,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:29,524 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 23:53:29,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:29,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112921811] [2020-07-21 23:53:29,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:29,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:53:29,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790906526] [2020-07-21 23:53:29,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:53:29,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:29,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:53:29,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:53:29,526 INFO L87 Difference]: Start difference. First operand 50226 states and 76627 transitions. Second operand 4 states. [2020-07-21 23:53:34,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:34,688 INFO L93 Difference]: Finished difference Result 107141 states and 163193 transitions. [2020-07-21 23:53:34,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:53:34,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-21 23:53:34,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:34,749 INFO L225 Difference]: With dead ends: 107141 [2020-07-21 23:53:34,749 INFO L226 Difference]: Without dead ends: 54023 [2020-07-21 23:53:34,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 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 23:53:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54023 states. [2020-07-21 23:53:38,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54023 to 54017. [2020-07-21 23:53:38,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54017 states. [2020-07-21 23:53:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54017 states to 54017 states and 81808 transitions. [2020-07-21 23:53:38,364 INFO L78 Accepts]: Start accepts. Automaton has 54017 states and 81808 transitions. Word has length 339 [2020-07-21 23:53:38,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:38,364 INFO L479 AbstractCegarLoop]: Abstraction has 54017 states and 81808 transitions. [2020-07-21 23:53:38,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:53:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 54017 states and 81808 transitions. [2020-07-21 23:53:38,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-21 23:53:38,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:38,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:38,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:38,596 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:38,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:38,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1897326802, now seen corresponding path program 1 times [2020-07-21 23:53:38,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:38,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153513902] [2020-07-21 23:53:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:38,849 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:53:38,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:38,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:53:38,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:38,926 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 23:53:38,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:38,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153513902] [2020-07-21 23:53:38,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:38,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:53:38,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691972658] [2020-07-21 23:53:38,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:53:38,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:38,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:53:38,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:53:38,928 INFO L87 Difference]: Start difference. First operand 54017 states and 81808 transitions. Second operand 4 states. [2020-07-21 23:53:45,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:45,833 INFO L93 Difference]: Finished difference Result 138860 states and 208961 transitions. [2020-07-21 23:53:45,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:53:45,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-21 23:53:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:45,938 INFO L225 Difference]: With dead ends: 138860 [2020-07-21 23:53:45,938 INFO L226 Difference]: Without dead ends: 96158 [2020-07-21 23:53:45,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 337 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 23:53:46,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96158 states. [2020-07-21 23:53:50,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96158 to 57651. [2020-07-21 23:53:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57651 states. [2020-07-21 23:53:50,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57651 states to 57651 states and 87465 transitions. [2020-07-21 23:53:50,437 INFO L78 Accepts]: Start accepts. Automaton has 57651 states and 87465 transitions. Word has length 340 [2020-07-21 23:53:50,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:50,437 INFO L479 AbstractCegarLoop]: Abstraction has 57651 states and 87465 transitions. [2020-07-21 23:53:50,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:53:50,437 INFO L276 IsEmpty]: Start isEmpty. Operand 57651 states and 87465 transitions. [2020-07-21 23:53:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 23:53:50,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:50,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:50,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:50,671 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:50,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:50,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1775562027, now seen corresponding path program 1 times [2020-07-21 23:53:50,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:50,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563684111] [2020-07-21 23:53:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:50,956 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:53:50,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:50,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:53:50,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:51,048 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 23:53:51,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:51,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563684111] [2020-07-21 23:53:51,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:51,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:53:51,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227483052] [2020-07-21 23:53:51,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:53:51,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:51,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:53:51,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:51,050 INFO L87 Difference]: Start difference. First operand 57651 states and 87465 transitions. Second operand 3 states. [2020-07-21 23:53:59,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:59,463 INFO L93 Difference]: Finished difference Result 157308 states and 237515 transitions. [2020-07-21 23:53:59,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:53:59,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-21 23:53:59,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:59,590 INFO L225 Difference]: With dead ends: 157308 [2020-07-21 23:53:59,590 INFO L226 Difference]: Without dead ends: 110298 [2020-07-21 23:53:59,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 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 23:53:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110298 states. [2020-07-21 23:54:09,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110298 to 110296. [2020-07-21 23:54:09,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110296 states. [2020-07-21 23:54:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110296 states to 110296 states and 166081 transitions. [2020-07-21 23:54:09,806 INFO L78 Accepts]: Start accepts. Automaton has 110296 states and 166081 transitions. Word has length 341 [2020-07-21 23:54:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:54:09,806 INFO L479 AbstractCegarLoop]: Abstraction has 110296 states and 166081 transitions. [2020-07-21 23:54:09,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:54:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 110296 states and 166081 transitions. [2020-07-21 23:54:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 23:54:09,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:54:09,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:54:10,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:10,066 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:54:10,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:54:10,067 INFO L82 PathProgramCache]: Analyzing trace with hash 572764343, now seen corresponding path program 1 times [2020-07-21 23:54:10,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:54:10,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156586726] [2020-07-21 23:54:10,068 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:10,318 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:54:10,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:54:10,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:54:10,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:54:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:54:10,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:54:10,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156586726] [2020-07-21 23:54:10,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:54:10,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:54:10,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891817725] [2020-07-21 23:54:10,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:54:10,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:54:10,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:54:10,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:54:10,378 INFO L87 Difference]: Start difference. First operand 110296 states and 166081 transitions. Second operand 3 states. [2020-07-21 23:54:25,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:54:25,010 INFO L93 Difference]: Finished difference Result 277644 states and 414967 transitions. [2020-07-21 23:54:25,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:54:25,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 23:54:25,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:54:25,294 INFO L225 Difference]: With dead ends: 277644 [2020-07-21 23:54:25,294 INFO L226 Difference]: Without dead ends: 194066 [2020-07-21 23:54:25,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 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 23:54:25,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194066 states. [2020-07-21 23:54:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194066 to 111376. [2020-07-21 23:54:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111376 states. [2020-07-21 23:54:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111376 states to 111376 states and 167501 transitions. [2020-07-21 23:54:37,200 INFO L78 Accepts]: Start accepts. Automaton has 111376 states and 167501 transitions. Word has length 342 [2020-07-21 23:54:37,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:54:37,200 INFO L479 AbstractCegarLoop]: Abstraction has 111376 states and 167501 transitions. [2020-07-21 23:54:37,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:54:37,200 INFO L276 IsEmpty]: Start isEmpty. Operand 111376 states and 167501 transitions. [2020-07-21 23:54:37,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 23:54:37,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:54:37,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:54:37,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:37,496 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:54:37,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:54:37,497 INFO L82 PathProgramCache]: Analyzing trace with hash -465543073, now seen corresponding path program 1 times [2020-07-21 23:54:37,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:54:37,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054965385] [2020-07-21 23:54:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:37,753 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:54:37,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:54:37,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:54:37,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:54:37,839 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 23:54:37,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:54:37,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054965385] [2020-07-21 23:54:37,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:54:37,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:54:37,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565039357] [2020-07-21 23:54:37,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:54:37,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:54:37,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:54:37,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:54:37,844 INFO L87 Difference]: Start difference. First operand 111376 states and 167501 transitions. Second operand 4 states. [2020-07-21 23:54:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:54:49,621 INFO L93 Difference]: Finished difference Result 197073 states and 295844 transitions. [2020-07-21 23:54:49,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:54:49,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 342 [2020-07-21 23:54:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:54:49,797 INFO L225 Difference]: With dead ends: 197073 [2020-07-21 23:54:49,797 INFO L226 Difference]: Without dead ends: 157505 [2020-07-21 23:54:49,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 339 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 23:54:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157505 states. [2020-07-21 23:55:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157505 to 119017. [2020-07-21 23:55:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119017 states. [2020-07-21 23:55:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119017 states to 119017 states and 179222 transitions. [2020-07-21 23:55:01,852 INFO L78 Accepts]: Start accepts. Automaton has 119017 states and 179222 transitions. Word has length 342 [2020-07-21 23:55:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:55:01,852 INFO L479 AbstractCegarLoop]: Abstraction has 119017 states and 179222 transitions. [2020-07-21 23:55:01,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:55:01,852 INFO L276 IsEmpty]: Start isEmpty. Operand 119017 states and 179222 transitions. [2020-07-21 23:55:01,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 23:55:01,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:55:01,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:55:02,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:55:02,125 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:55:02,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:55:02,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1125984775, now seen corresponding path program 1 times [2020-07-21 23:55:02,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:55:02,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886629424] [2020-07-21 23:55:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:55:02,382 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:55:02,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:55:02,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:55:02,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:55:02,446 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 23:55:02,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:55:02,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886629424] [2020-07-21 23:55:02,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:55:02,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:55:02,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184102287] [2020-07-21 23:55:02,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:55:02,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:55:02,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:55:02,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:55:02,448 INFO L87 Difference]: Start difference. First operand 119017 states and 179222 transitions. Second operand 4 states. [2020-07-21 23:55:16,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:55:16,225 INFO L93 Difference]: Finished difference Result 261484 states and 389159 transitions. [2020-07-21 23:55:16,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:55:16,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 343 [2020-07-21 23:55:16,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:55:16,405 INFO L225 Difference]: With dead ends: 261484 [2020-07-21 23:55:16,405 INFO L226 Difference]: Without dead ends: 133933 [2020-07-21 23:55:16,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 340 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 23:55:16,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133933 states. [2020-07-21 23:55:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133933 to 133931. [2020-07-21 23:55:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133931 states. [2020-07-21 23:55:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133931 states to 133931 states and 197598 transitions. [2020-07-21 23:55:27,178 INFO L78 Accepts]: Start accepts. Automaton has 133931 states and 197598 transitions. Word has length 343 [2020-07-21 23:55:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:55:27,178 INFO L479 AbstractCegarLoop]: Abstraction has 133931 states and 197598 transitions. [2020-07-21 23:55:27,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:55:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 133931 states and 197598 transitions. [2020-07-21 23:55:27,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 23:55:27,267 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:55:27,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:55:27,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:55:27,468 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:55:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:55:27,469 INFO L82 PathProgramCache]: Analyzing trace with hash 332815650, now seen corresponding path program 1 times [2020-07-21 23:55:27,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:55:27,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971732704] [2020-07-21 23:55:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:55:27,728 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:55:27,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:55:27,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:55:27,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:55:27,811 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 23:55:27,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:55:27,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971732704] [2020-07-21 23:55:27,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:55:27,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:55:27,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564988549] [2020-07-21 23:55:27,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:55:27,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:55:27,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:55:27,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:55:27,814 INFO L87 Difference]: Start difference. First operand 133931 states and 197598 transitions. Second operand 3 states. [2020-07-21 23:55:47,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:55:47,895 INFO L93 Difference]: Finished difference Result 351341 states and 517927 transitions. [2020-07-21 23:55:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:55:47,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2020-07-21 23:55:47,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:55:48,172 INFO L225 Difference]: With dead ends: 351341 [2020-07-21 23:55:48,172 INFO L226 Difference]: Without dead ends: 230235 [2020-07-21 23:55:48,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 341 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 23:55:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230235 states. [2020-07-21 23:55:59,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230235 to 129579. [2020-07-21 23:55:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129579 states. [2020-07-21 23:56:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129579 states to 129579 states and 191067 transitions. [2020-07-21 23:56:00,111 INFO L78 Accepts]: Start accepts. Automaton has 129579 states and 191067 transitions. Word has length 343 [2020-07-21 23:56:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:56:00,111 INFO L479 AbstractCegarLoop]: Abstraction has 129579 states and 191067 transitions. [2020-07-21 23:56:00,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:56:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 129579 states and 191067 transitions. [2020-07-21 23:56:00,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 23:56:00,189 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:56:00,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:56:00,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:00,403 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:56:00,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:56:00,405 INFO L82 PathProgramCache]: Analyzing trace with hash -481817221, now seen corresponding path program 1 times [2020-07-21 23:56:00,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:56:00,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299606280] [2020-07-21 23:56:00,406 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:00,657 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:56:00,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:56:00,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:56:00,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:56:00,726 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 23:56:00,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:56:00,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299606280] [2020-07-21 23:56:00,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:56:00,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:56:00,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346436488] [2020-07-21 23:56:00,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:56:00,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:56:00,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:56:00,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:56:00,728 INFO L87 Difference]: Start difference. First operand 129579 states and 191067 transitions. Second operand 3 states. [2020-07-21 23:56:20,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:56:20,747 INFO L93 Difference]: Finished difference Result 312449 states and 459918 transitions. [2020-07-21 23:56:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:56:20,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2020-07-21 23:56:20,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:56:20,998 INFO L225 Difference]: With dead ends: 312449 [2020-07-21 23:56:20,998 INFO L226 Difference]: Without dead ends: 220857 [2020-07-21 23:56:21,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 341 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 23:56:21,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220857 states. [2020-07-21 23:56:32,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220857 to 131539. [2020-07-21 23:56:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131539 states. [2020-07-21 23:56:32,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131539 states to 131539 states and 193649 transitions. [2020-07-21 23:56:32,919 INFO L78 Accepts]: Start accepts. Automaton has 131539 states and 193649 transitions. Word has length 343 [2020-07-21 23:56:32,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:56:32,919 INFO L479 AbstractCegarLoop]: Abstraction has 131539 states and 193649 transitions. [2020-07-21 23:56:32,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:56:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 131539 states and 193649 transitions. [2020-07-21 23:56:33,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-21 23:56:33,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:56:33,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:56:33,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:33,218 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:56:33,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:56:33,219 INFO L82 PathProgramCache]: Analyzing trace with hash 276113738, now seen corresponding path program 1 times [2020-07-21 23:56:33,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:56:33,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330269535] [2020-07-21 23:56:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:33,474 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:56:33,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:56:33,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:56:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:56:33,957 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 23:56:33,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:56:33,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330269535] [2020-07-21 23:56:33,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:56:33,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:56:33,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060235659] [2020-07-21 23:56:33,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:56:33,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:56:33,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:56:33,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:56:33,959 INFO L87 Difference]: Start difference. First operand 131539 states and 193649 transitions. Second operand 4 states. [2020-07-21 23:56:48,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:56:48,731 INFO L93 Difference]: Finished difference Result 287581 states and 421597 transitions. [2020-07-21 23:56:48,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:56:48,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-21 23:56:48,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:56:48,891 INFO L225 Difference]: With dead ends: 287581 [2020-07-21 23:56:48,892 INFO L226 Difference]: Without dead ends: 138816 [2020-07-21 23:56:48,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 341 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 23:56:49,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138816 states. [2020-07-21 23:56:59,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138816 to 138814. [2020-07-21 23:56:59,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138814 states. [2020-07-21 23:57:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138814 states to 138814 states and 202614 transitions. [2020-07-21 23:57:00,096 INFO L78 Accepts]: Start accepts. Automaton has 138814 states and 202614 transitions. Word has length 344 [2020-07-21 23:57:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:00,096 INFO L479 AbstractCegarLoop]: Abstraction has 138814 states and 202614 transitions. [2020-07-21 23:57:00,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:57:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 138814 states and 202614 transitions. [2020-07-21 23:57:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-21 23:57:00,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:00,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:00,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:00,389 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:00,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1076892410, now seen corresponding path program 1 times [2020-07-21 23:57:00,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:00,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998963736] [2020-07-21 23:57:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:00,688 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:57:00,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:00,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:57:00,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:57:00,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:00,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998963736] [2020-07-21 23:57:00,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:00,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:57:00,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557725553] [2020-07-21 23:57:00,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:57:00,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:00,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:57:00,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:57:00,781 INFO L87 Difference]: Start difference. First operand 138814 states and 202614 transitions. Second operand 4 states. [2020-07-21 23:57:24,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:57:24,587 INFO L93 Difference]: Finished difference Result 391421 states and 569935 transitions. [2020-07-21 23:57:24,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:57:24,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-21 23:57:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:57:24,908 INFO L225 Difference]: With dead ends: 391421 [2020-07-21 23:57:24,908 INFO L226 Difference]: Without dead ends: 256069 [2020-07-21 23:57:25,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 341 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 23:57:25,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256069 states. [2020-07-21 23:57:51,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256069 to 256067. [2020-07-21 23:57:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256067 states. [2020-07-21 23:57:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256067 states to 256067 states and 370603 transitions. [2020-07-21 23:57:51,820 INFO L78 Accepts]: Start accepts. Automaton has 256067 states and 370603 transitions. Word has length 344 [2020-07-21 23:57:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:51,820 INFO L479 AbstractCegarLoop]: Abstraction has 256067 states and 370603 transitions. [2020-07-21 23:57:51,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:57:51,820 INFO L276 IsEmpty]: Start isEmpty. Operand 256067 states and 370603 transitions. [2020-07-21 23:57:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-21 23:57:52,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:52,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:52,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:52,223 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1852880630, now seen corresponding path program 1 times [2020-07-21 23:57:52,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:52,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560808308] [2020-07-21 23:57:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:52,496 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:57:52,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:52,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:57:52,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:52,616 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 23:57:52,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:52,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560808308] [2020-07-21 23:57:52,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:52,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:57:52,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355748619] [2020-07-21 23:57:52,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:57:52,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:52,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:57:52,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:52,619 INFO L87 Difference]: Start difference. First operand 256067 states and 370603 transitions. Second operand 3 states. [2020-07-21 23:58:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:58:39,286 INFO L93 Difference]: Finished difference Result 691835 states and 998204 transitions. [2020-07-21 23:58:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:58:39,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 346 [2020-07-21 23:58:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:58:40,222 INFO L225 Difference]: With dead ends: 691835 [2020-07-21 23:58:40,222 INFO L226 Difference]: Without dead ends: 485407 [2020-07-21 23:58:40,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 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 23:58:40,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485407 states. [2020-07-21 23:59:30,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485407 to 485405. [2020-07-21 23:59:30,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485405 states. [2020-07-21 23:59:31,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485405 states to 485405 states and 696622 transitions. [2020-07-21 23:59:31,535 INFO L78 Accepts]: Start accepts. Automaton has 485405 states and 696622 transitions. Word has length 346 [2020-07-21 23:59:31,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:59:31,535 INFO L479 AbstractCegarLoop]: Abstraction has 485405 states and 696622 transitions. [2020-07-21 23:59:31,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:59:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 485405 states and 696622 transitions. [2020-07-21 23:59:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-07-21 23:59:31,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:59:31,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:59:32,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:32,118 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:59:32,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:59:32,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1664677053, now seen corresponding path program 1 times [2020-07-21 23:59:32,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:59:32,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007072860] [2020-07-21 23:59:32,120 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:59:32,377 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:59:32,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:59:32,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:59:32,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:59:32,456 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 23:59:32,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:59:32,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007072860] [2020-07-21 23:59:32,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:59:32,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:59:32,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260341090] [2020-07-21 23:59:32,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:59:32,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:59:32,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:59:32,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:59:32,460 INFO L87 Difference]: Start difference. First operand 485405 states and 696622 transitions. Second operand 3 states. [2020-07-22 00:00:53,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:00:53,711 INFO L93 Difference]: Finished difference Result 1171190 states and 1681978 transitions. [2020-07-22 00:00:53,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:00:53,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 347 [2020-07-22 00:00:53,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:00:55,044 INFO L225 Difference]: With dead ends: 1171190 [2020-07-22 00:00:55,044 INFO L226 Difference]: Without dead ends: 828525 [2020-07-22 00:00:55,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:00:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828525 states. [2020-07-22 00:02:02,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828525 to 493249. [2020-07-22 00:02:02,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493249 states. [2020-07-22 00:02:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493249 states to 493249 states and 704314 transitions. [2020-07-22 00:02:03,481 INFO L78 Accepts]: Start accepts. Automaton has 493249 states and 704314 transitions. Word has length 347 [2020-07-22 00:02:03,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:02:03,482 INFO L479 AbstractCegarLoop]: Abstraction has 493249 states and 704314 transitions. [2020-07-22 00:02:03,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-22 00:02:03,482 INFO L276 IsEmpty]: Start isEmpty. Operand 493249 states and 704314 transitions. [2020-07-22 00:02:03,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-22 00:02:03,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:02:03,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-22 00:02:04,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:02:04,072 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:02:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:02:04,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1355375446, now seen corresponding path program 1 times [2020-07-22 00:02:04,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:02:04,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842800352] [2020-07-22 00:02:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:02:04,335 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-22 00:02:04,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:02:04,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-22 00:02:04,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:02:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:02:05,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:02:05,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842800352] [2020-07-22 00:02:05,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:02:05,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-22 00:02:05,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757252932] [2020-07-22 00:02:05,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-22 00:02:05,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:02:05,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-22 00:02:05,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:02:05,321 INFO L87 Difference]: Start difference. First operand 493249 states and 704314 transitions. Second operand 3 states. [2020-07-22 00:03:22,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:03:22,441 INFO L93 Difference]: Finished difference Result 998165 states and 1431307 transitions. [2020-07-22 00:03:22,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:03:22,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 348 [2020-07-22 00:03:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:03:23,904 INFO L225 Difference]: With dead ends: 998165 [2020-07-22 00:03:23,904 INFO L226 Difference]: Without dead ends: 723095 [2020-07-22 00:03:24,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:03:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723095 states. [2020-07-22 00:04:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723095 to 493308. [2020-07-22 00:04:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493308 states. [2020-07-22 00:04:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493308 states to 493308 states and 704317 transitions. [2020-07-22 00:04:22,924 INFO L78 Accepts]: Start accepts. Automaton has 493308 states and 704317 transitions. Word has length 348 [2020-07-22 00:04:22,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:04:22,925 INFO L479 AbstractCegarLoop]: Abstraction has 493308 states and 704317 transitions. [2020-07-22 00:04:22,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-22 00:04:22,925 INFO L276 IsEmpty]: Start isEmpty. Operand 493308 states and 704317 transitions. [2020-07-22 00:04:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-22 00:04:23,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:04:23,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-22 00:04:23,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:04:23,558 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:04:23,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:04:23,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1465789504, now seen corresponding path program 1 times [2020-07-22 00:04:23,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:04:23,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269627228] [2020-07-22 00:04:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:04:23,816 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-22 00:04:23,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:04:23,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-22 00:04:23,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:04:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:04:23,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:04:23,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269627228] [2020-07-22 00:04:23,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:04:23,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-22 00:04:23,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881677584] [2020-07-22 00:04:23,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-22 00:04:23,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:04:23,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-22 00:04:23,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-22 00:04:23,873 INFO L87 Difference]: Start difference. First operand 493308 states and 704317 transitions. Second operand 4 states.