/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 21:02:04,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 21:02:04,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 21:02:04,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 21:02:04,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 21:02:04,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 21:02:04,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 21:02:04,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 21:02:04,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 21:02:04,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 21:02:04,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 21:02:04,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 21:02:04,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 21:02:04,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 21:02:04,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 21:02:04,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 21:02:04,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 21:02:04,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 21:02:04,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 21:02:04,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 21:02:04,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 21:02:04,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 21:02:04,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 21:02:04,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 21:02:04,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 21:02:04,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 21:02:04,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 21:02:04,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 21:02:04,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 21:02:04,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 21:02:04,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 21:02:04,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 21:02:04,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 21:02:04,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 21:02:04,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 21:02:04,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 21:02:04,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 21:02:04,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 21:02:04,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 21:02:04,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 21:02:04,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 21:02:04,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 21:02:04,453 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 21:02:04,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 21:02:04,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 21:02:04,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 21:02:04,455 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 21:02:04,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 21:02:04,455 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 21:02:04,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 21:02:04,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 21:02:04,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 21:02:04,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 21:02:04,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 21:02:04,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 21:02:04,457 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 21:02:04,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 21:02:04,457 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 21:02:04,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 21:02:04,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 21:02:04,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 21:02:04,458 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 21:02:04,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 21:02:04,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:02:04,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 21:02:04,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 21:02:04,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 21:02:04,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 21:02:04,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:04,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 21:02:04,460 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 21:02:04,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 21:02:04,730 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 21:02:04,748 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 21:02:04,752 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 21:02:04,753 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 21:02:04,753 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 21:02:04,754 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 21:02:04,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d158fa91/a5b3ba9a139646cb8d178a55b505317b/FLAG517ae36d5 [2020-07-21 21:02:05,530 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 21:02:05,531 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 21:02:05,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d158fa91/a5b3ba9a139646cb8d178a55b505317b/FLAG517ae36d5 [2020-07-21 21:02:05,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d158fa91/a5b3ba9a139646cb8d178a55b505317b [2020-07-21 21:02:05,680 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 21:02:05,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 21:02:05,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 21:02:05,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 21:02:05,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 21:02:05,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:02:05" (1/1) ... [2020-07-21 21:02:05,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b045c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:05, skipping insertion in model container [2020-07-21 21:02:05,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:02:05" (1/1) ... [2020-07-21 21:02:05,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 21:02:05,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 21:02:07,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:02:07,307 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 21:02:08,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:02:08,402 INFO L208 MainTranslator]: Completed translation [2020-07-21 21:02:08,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:08 WrapperNode [2020-07-21 21:02:08,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 21:02:08,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 21:02:08,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 21:02:08,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 21:02:08,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:08" (1/1) ... [2020-07-21 21:02:08,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:08" (1/1) ... [2020-07-21 21:02:08,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:08" (1/1) ... [2020-07-21 21:02:08,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:08" (1/1) ... [2020-07-21 21:02:08,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:08" (1/1) ... [2020-07-21 21:02:08,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:08" (1/1) ... [2020-07-21 21:02:08,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:08" (1/1) ... [2020-07-21 21:02:08,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 21:02:08,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 21:02:08,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 21:02:08,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 21:02:08,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:02:08,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 21:02:08,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 21:02:08,694 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 21:02:08,695 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 21:02:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 21:02:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 21:02:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 21:02:08,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 21:02:08,697 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 21:02:08,697 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 21:02:08,698 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 21:02:08,699 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 21:02:08,699 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 21:02:08,699 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 21:02:08,700 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 21:02:08,701 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 21:02:08,701 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 21:02:08,701 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 21:02:08,701 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 21:02:08,702 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 21:02:08,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 21:02:08,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 21:02:08,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 21:02:12,525 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 21:02:12,526 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 21:02:12,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:02:12 BoogieIcfgContainer [2020-07-21 21:02:12,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 21:02:12,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 21:02:12,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 21:02:12,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 21:02:12,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:02:05" (1/3) ... [2020-07-21 21:02:12,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a5306ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:02:12, skipping insertion in model container [2020-07-21 21:02:12,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:08" (2/3) ... [2020-07-21 21:02:12,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a5306ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:02:12, skipping insertion in model container [2020-07-21 21:02:12,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:02:12" (3/3) ... [2020-07-21 21:02:12,543 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 21:02:12,553 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 21:02:12,562 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 21:02:12,575 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 21:02:12,602 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 21:02:12,602 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 21:02:12,602 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 21:02:12,603 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 21:02:12,603 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 21:02:12,603 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 21:02:12,603 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 21:02:12,603 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 21:02:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states. [2020-07-21 21:02:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 21:02:12,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:12,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:12,689 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:12,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:12,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1447603851, now seen corresponding path program 1 times [2020-07-21 21:02:12,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:12,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611021928] [2020-07-21 21:02:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:13,432 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:02:13,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:13,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:02:13,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:02:13,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:13,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611021928] [2020-07-21 21:02:13,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:13,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:02:13,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042206519] [2020-07-21 21:02:13,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:02:13,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:13,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:02:13,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:02:13,915 INFO L87 Difference]: Start difference. First operand 1393 states. Second operand 4 states. [2020-07-21 21:02:14,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:14,365 INFO L93 Difference]: Finished difference Result 4125 states and 7467 transitions. [2020-07-21 21:02:14,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:02:14,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-21 21:02:14,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:14,403 INFO L225 Difference]: With dead ends: 4125 [2020-07-21 21:02:14,404 INFO L226 Difference]: Without dead ends: 2741 [2020-07-21 21:02:14,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:02:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2020-07-21 21:02:14,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2688. [2020-07-21 21:02:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2688 states. [2020-07-21 21:02:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 4398 transitions. [2020-07-21 21:02:14,701 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 4398 transitions. Word has length 473 [2020-07-21 21:02:14,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:14,703 INFO L479 AbstractCegarLoop]: Abstraction has 2688 states and 4398 transitions. [2020-07-21 21:02:14,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:02:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 4398 transitions. [2020-07-21 21:02:14,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 21:02:14,722 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:14,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:14,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:14,937 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:14,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:14,938 INFO L82 PathProgramCache]: Analyzing trace with hash -369254340, now seen corresponding path program 1 times [2020-07-21 21:02:14,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:14,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136829464] [2020-07-21 21:02:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:15,477 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:02:15,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:15,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 2914 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:02:15,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:02:15,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:15,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136829464] [2020-07-21 21:02:15,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:15,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:15,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765274093] [2020-07-21 21:02:15,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:15,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:15,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:15,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:15,756 INFO L87 Difference]: Start difference. First operand 2688 states and 4398 transitions. Second operand 3 states. [2020-07-21 21:02:16,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:16,106 INFO L93 Difference]: Finished difference Result 7793 states and 12713 transitions. [2020-07-21 21:02:16,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:16,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 475 [2020-07-21 21:02:16,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:16,140 INFO L225 Difference]: With dead ends: 7793 [2020-07-21 21:02:16,140 INFO L226 Difference]: Without dead ends: 5319 [2020-07-21 21:02:16,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2020-07-21 21:02:16,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5268. [2020-07-21 21:02:16,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5268 states. [2020-07-21 21:02:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 8596 transitions. [2020-07-21 21:02:16,400 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 8596 transitions. Word has length 475 [2020-07-21 21:02:16,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:16,405 INFO L479 AbstractCegarLoop]: Abstraction has 5268 states and 8596 transitions. [2020-07-21 21:02:16,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 8596 transitions. [2020-07-21 21:02:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 21:02:16,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:16,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:16,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:16,642 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:16,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:16,643 INFO L82 PathProgramCache]: Analyzing trace with hash -567190772, now seen corresponding path program 1 times [2020-07-21 21:02:16,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:16,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445965314] [2020-07-21 21:02:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:17,004 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:17,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:17,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:02:17,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:02:17,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:17,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445965314] [2020-07-21 21:02:17,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:17,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:17,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332882928] [2020-07-21 21:02:17,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:17,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:17,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:17,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:17,134 INFO L87 Difference]: Start difference. First operand 5268 states and 8596 transitions. Second operand 3 states. [2020-07-21 21:02:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:17,504 INFO L93 Difference]: Finished difference Result 15707 states and 25620 transitions. [2020-07-21 21:02:17,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:17,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-21 21:02:17,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:17,556 INFO L225 Difference]: With dead ends: 15707 [2020-07-21 21:02:17,556 INFO L226 Difference]: Without dead ends: 10491 [2020-07-21 21:02:17,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:17,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2020-07-21 21:02:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 5315. [2020-07-21 21:02:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5315 states. [2020-07-21 21:02:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 8670 transitions. [2020-07-21 21:02:17,943 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 8670 transitions. Word has length 476 [2020-07-21 21:02:17,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:17,944 INFO L479 AbstractCegarLoop]: Abstraction has 5315 states and 8670 transitions. [2020-07-21 21:02:17,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 8670 transitions. [2020-07-21 21:02:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 21:02:17,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:17,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:18,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:18,180 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:18,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1389649697, now seen corresponding path program 1 times [2020-07-21 21:02:18,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:18,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76931456] [2020-07-21 21:02:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:18,545 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:18,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:18,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:02:18,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:02:18,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:18,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76931456] [2020-07-21 21:02:18,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:18,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:02:18,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238339486] [2020-07-21 21:02:18,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:02:18,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:18,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:02:18,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:02:18,692 INFO L87 Difference]: Start difference. First operand 5315 states and 8670 transitions. Second operand 4 states. [2020-07-21 21:02:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:19,173 INFO L93 Difference]: Finished difference Result 12557 states and 20624 transitions. [2020-07-21 21:02:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:02:19,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-21 21:02:19,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:19,205 INFO L225 Difference]: With dead ends: 12557 [2020-07-21 21:02:19,205 INFO L226 Difference]: Without dead ends: 6507 [2020-07-21 21:02:19,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:02:19,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6507 states. [2020-07-21 21:02:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6507 to 6456. [2020-07-21 21:02:19,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6456 states. [2020-07-21 21:02:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6456 states to 6456 states and 10597 transitions. [2020-07-21 21:02:19,451 INFO L78 Accepts]: Start accepts. Automaton has 6456 states and 10597 transitions. Word has length 477 [2020-07-21 21:02:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:19,452 INFO L479 AbstractCegarLoop]: Abstraction has 6456 states and 10597 transitions. [2020-07-21 21:02:19,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:02:19,452 INFO L276 IsEmpty]: Start isEmpty. Operand 6456 states and 10597 transitions. [2020-07-21 21:02:19,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 21:02:19,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:19,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:19,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:19,682 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:19,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:19,682 INFO L82 PathProgramCache]: Analyzing trace with hash 481621780, now seen corresponding path program 1 times [2020-07-21 21:02:19,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:19,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138965243] [2020-07-21 21:02:19,684 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:20,526 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:02:20,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:20,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 2921 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:02:20,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:02:21,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:21,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138965243] [2020-07-21 21:02:21,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:21,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:21,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319435097] [2020-07-21 21:02:21,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:21,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:21,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:21,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:21,303 INFO L87 Difference]: Start difference. First operand 6456 states and 10597 transitions. Second operand 3 states. [2020-07-21 21:02:21,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:21,739 INFO L93 Difference]: Finished difference Result 18336 states and 29960 transitions. [2020-07-21 21:02:21,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:21,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-21 21:02:21,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:21,788 INFO L225 Difference]: With dead ends: 18336 [2020-07-21 21:02:21,788 INFO L226 Difference]: Without dead ends: 12588 [2020-07-21 21:02:21,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12588 states. [2020-07-21 21:02:22,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12588 to 12539. [2020-07-21 21:02:22,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12539 states. [2020-07-21 21:02:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12539 states to 12539 states and 20486 transitions. [2020-07-21 21:02:22,224 INFO L78 Accepts]: Start accepts. Automaton has 12539 states and 20486 transitions. Word has length 479 [2020-07-21 21:02:22,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:22,225 INFO L479 AbstractCegarLoop]: Abstraction has 12539 states and 20486 transitions. [2020-07-21 21:02:22,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:22,225 INFO L276 IsEmpty]: Start isEmpty. Operand 12539 states and 20486 transitions. [2020-07-21 21:02:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 21:02:22,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:22,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:22,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:22,472 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:22,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1155855257, now seen corresponding path program 1 times [2020-07-21 21:02:22,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:22,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828018950] [2020-07-21 21:02:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:22,822 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:22,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:22,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:02:22,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:02:22,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:22,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828018950] [2020-07-21 21:02:22,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:22,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:22,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530987465] [2020-07-21 21:02:22,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:22,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:22,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:22,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:22,973 INFO L87 Difference]: Start difference. First operand 12539 states and 20486 transitions. Second operand 3 states. [2020-07-21 21:02:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:23,638 INFO L93 Difference]: Finished difference Result 37264 states and 60830 transitions. [2020-07-21 21:02:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:23,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-21 21:02:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:23,707 INFO L225 Difference]: With dead ends: 37264 [2020-07-21 21:02:23,707 INFO L226 Difference]: Without dead ends: 24904 [2020-07-21 21:02:23,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:23,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24904 states. [2020-07-21 21:02:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24904 to 12658. [2020-07-21 21:02:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12658 states. [2020-07-21 21:02:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12658 states to 12658 states and 20645 transitions. [2020-07-21 21:02:24,370 INFO L78 Accepts]: Start accepts. Automaton has 12658 states and 20645 transitions. Word has length 479 [2020-07-21 21:02:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:24,370 INFO L479 AbstractCegarLoop]: Abstraction has 12658 states and 20645 transitions. [2020-07-21 21:02:24,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:24,370 INFO L276 IsEmpty]: Start isEmpty. Operand 12658 states and 20645 transitions. [2020-07-21 21:02:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 21:02:24,392 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:24,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:24,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:24,606 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash 132761062, now seen corresponding path program 1 times [2020-07-21 21:02:24,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:24,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874317770] [2020-07-21 21:02:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:24,946 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:24,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:24,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:02:24,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:02:25,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:25,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874317770] [2020-07-21 21:02:25,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:25,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:25,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898533820] [2020-07-21 21:02:25,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:25,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:25,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:25,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:25,080 INFO L87 Difference]: Start difference. First operand 12658 states and 20645 transitions. Second operand 3 states. [2020-07-21 21:02:25,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:25,684 INFO L93 Difference]: Finished difference Result 37516 states and 61179 transitions. [2020-07-21 21:02:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:25,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-21 21:02:25,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:25,732 INFO L225 Difference]: With dead ends: 37516 [2020-07-21 21:02:25,732 INFO L226 Difference]: Without dead ends: 25107 [2020-07-21 21:02:25,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:25,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25107 states. [2020-07-21 21:02:26,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25107 to 12861. [2020-07-21 21:02:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12861 states. [2020-07-21 21:02:26,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12861 states to 12861 states and 20927 transitions. [2020-07-21 21:02:26,265 INFO L78 Accepts]: Start accepts. Automaton has 12861 states and 20927 transitions. Word has length 480 [2020-07-21 21:02:26,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:26,266 INFO L479 AbstractCegarLoop]: Abstraction has 12861 states and 20927 transitions. [2020-07-21 21:02:26,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:26,266 INFO L276 IsEmpty]: Start isEmpty. Operand 12861 states and 20927 transitions. [2020-07-21 21:02:26,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 21:02:26,283 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:26,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:26,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:26,485 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:26,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:26,486 INFO L82 PathProgramCache]: Analyzing trace with hash 642676975, now seen corresponding path program 1 times [2020-07-21 21:02:26,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:26,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728696725] [2020-07-21 21:02:26,487 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:26,844 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:26,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:26,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:02:26,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:02:27,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:27,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728696725] [2020-07-21 21:02:27,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:27,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:02:27,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024924854] [2020-07-21 21:02:27,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:02:27,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:27,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:02:27,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:02:27,072 INFO L87 Difference]: Start difference. First operand 12861 states and 20927 transitions. Second operand 4 states. [2020-07-21 21:02:27,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:27,691 INFO L93 Difference]: Finished difference Result 30821 states and 50479 transitions. [2020-07-21 21:02:27,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:02:27,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-07-21 21:02:27,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:27,717 INFO L225 Difference]: With dead ends: 30821 [2020-07-21 21:02:27,717 INFO L226 Difference]: Without dead ends: 16213 [2020-07-21 21:02:27,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:02:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16213 states. [2020-07-21 21:02:28,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16213 to 16164. [2020-07-21 21:02:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16164 states. [2020-07-21 21:02:28,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16164 states to 16164 states and 26416 transitions. [2020-07-21 21:02:28,883 INFO L78 Accepts]: Start accepts. Automaton has 16164 states and 26416 transitions. Word has length 481 [2020-07-21 21:02:28,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:28,883 INFO L479 AbstractCegarLoop]: Abstraction has 16164 states and 26416 transitions. [2020-07-21 21:02:28,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:02:28,883 INFO L276 IsEmpty]: Start isEmpty. Operand 16164 states and 26416 transitions. [2020-07-21 21:02:28,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 21:02:28,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:28,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:29,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:29,110 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:29,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:29,112 INFO L82 PathProgramCache]: Analyzing trace with hash 105349152, now seen corresponding path program 1 times [2020-07-21 21:02:29,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:29,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678715094] [2020-07-21 21:02:29,113 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:29,450 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:29,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:29,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:02:29,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:02:29,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:29,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678715094] [2020-07-21 21:02:29,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:29,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:29,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665648517] [2020-07-21 21:02:29,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:29,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:29,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:29,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:29,590 INFO L87 Difference]: Start difference. First operand 16164 states and 26416 transitions. Second operand 3 states. [2020-07-21 21:02:30,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:30,844 INFO L93 Difference]: Finished difference Result 44844 states and 73071 transitions. [2020-07-21 21:02:30,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:30,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-21 21:02:30,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:30,873 INFO L225 Difference]: With dead ends: 44844 [2020-07-21 21:02:30,873 INFO L226 Difference]: Without dead ends: 30514 [2020-07-21 21:02:30,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:30,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30514 states. [2020-07-21 21:02:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30514 to 16364. [2020-07-21 21:02:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16364 states. [2020-07-21 21:02:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16364 states to 16364 states and 26703 transitions. [2020-07-21 21:02:31,415 INFO L78 Accepts]: Start accepts. Automaton has 16364 states and 26703 transitions. Word has length 484 [2020-07-21 21:02:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:31,416 INFO L479 AbstractCegarLoop]: Abstraction has 16364 states and 26703 transitions. [2020-07-21 21:02:31,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 16364 states and 26703 transitions. [2020-07-21 21:02:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 21:02:31,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:31,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:31,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:31,639 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:31,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:31,640 INFO L82 PathProgramCache]: Analyzing trace with hash 40908921, now seen corresponding path program 1 times [2020-07-21 21:02:31,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:31,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646796381] [2020-07-21 21:02:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:31,963 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:31,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:31,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:02:31,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:02:32,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:32,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646796381] [2020-07-21 21:02:32,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:32,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:32,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340965091] [2020-07-21 21:02:32,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:32,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:32,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:32,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:32,104 INFO L87 Difference]: Start difference. First operand 16364 states and 26703 transitions. Second operand 3 states. [2020-07-21 21:02:32,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:32,937 INFO L93 Difference]: Finished difference Result 46260 states and 75364 transitions. [2020-07-21 21:02:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:32,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-21 21:02:32,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:32,968 INFO L225 Difference]: With dead ends: 46260 [2020-07-21 21:02:32,968 INFO L226 Difference]: Without dead ends: 31320 [2020-07-21 21:02:32,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31320 states. [2020-07-21 21:02:33,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31320 to 16542. [2020-07-21 21:02:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16542 states. [2020-07-21 21:02:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16542 states to 16542 states and 26960 transitions. [2020-07-21 21:02:33,563 INFO L78 Accepts]: Start accepts. Automaton has 16542 states and 26960 transitions. Word has length 484 [2020-07-21 21:02:33,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:33,564 INFO L479 AbstractCegarLoop]: Abstraction has 16542 states and 26960 transitions. [2020-07-21 21:02:33,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:33,564 INFO L276 IsEmpty]: Start isEmpty. Operand 16542 states and 26960 transitions. [2020-07-21 21:02:33,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 21:02:33,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:33,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:33,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:33,796 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:33,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:33,797 INFO L82 PathProgramCache]: Analyzing trace with hash 11218692, now seen corresponding path program 1 times [2020-07-21 21:02:33,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:33,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066474919] [2020-07-21 21:02:33,799 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:34,275 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:34,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:34,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1611 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 21:02:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:34,459 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-07-21 21:02:34,459 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 21:02:34,641 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:34,712 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:34,775 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:34,777 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:34,778 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:34,780 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:02:35,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:35,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066474919] [2020-07-21 21:02:35,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:35,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-21 21:02:35,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786921469] [2020-07-21 21:02:35,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 21:02:35,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:35,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 21:02:35,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-07-21 21:02:35,477 INFO L87 Difference]: Start difference. First operand 16542 states and 26960 transitions. Second operand 12 states. [2020-07-21 21:02:35,637 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-07-21 21:02:37,526 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-07-21 21:02:38,398 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-07-21 21:02:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:40,929 INFO L93 Difference]: Finished difference Result 27347 states and 43573 transitions. [2020-07-21 21:02:40,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 21:02:40,929 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 485 [2020-07-21 21:02:40,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:40,951 INFO L225 Difference]: With dead ends: 27347 [2020-07-21 21:02:40,952 INFO L226 Difference]: Without dead ends: 25533 [2020-07-21 21:02:40,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 473 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-07-21 21:02:40,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25533 states. [2020-07-21 21:02:41,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25533 to 18116. [2020-07-21 21:02:41,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18116 states. [2020-07-21 21:02:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18116 states to 18116 states and 29287 transitions. [2020-07-21 21:02:41,845 INFO L78 Accepts]: Start accepts. Automaton has 18116 states and 29287 transitions. Word has length 485 [2020-07-21 21:02:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:41,846 INFO L479 AbstractCegarLoop]: Abstraction has 18116 states and 29287 transitions. [2020-07-21 21:02:41,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 21:02:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 18116 states and 29287 transitions. [2020-07-21 21:02:41,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 21:02:41,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:41,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:42,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:42,080 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:42,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:42,081 INFO L82 PathProgramCache]: Analyzing trace with hash -476587614, now seen corresponding path program 1 times [2020-07-21 21:02:42,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:42,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145050488] [2020-07-21 21:02:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:42,565 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:02:42,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:42,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 2944 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:02:42,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:02:42,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:42,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145050488] [2020-07-21 21:02:42,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:42,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:42,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003641740] [2020-07-21 21:02:42,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:42,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:42,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:42,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:42,748 INFO L87 Difference]: Start difference. First operand 18116 states and 29287 transitions. Second operand 3 states. [2020-07-21 21:02:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:45,377 INFO L93 Difference]: Finished difference Result 32697 states and 51431 transitions. [2020-07-21 21:02:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:45,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2020-07-21 21:02:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:45,398 INFO L225 Difference]: With dead ends: 32697 [2020-07-21 21:02:45,398 INFO L226 Difference]: Without dead ends: 24618 [2020-07-21 21:02:45,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:45,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24618 states. [2020-07-21 21:02:46,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24618 to 24532. [2020-07-21 21:02:46,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24532 states. [2020-07-21 21:02:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24532 states to 24532 states and 38877 transitions. [2020-07-21 21:02:46,385 INFO L78 Accepts]: Start accepts. Automaton has 24532 states and 38877 transitions. Word has length 485 [2020-07-21 21:02:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:46,386 INFO L479 AbstractCegarLoop]: Abstraction has 24532 states and 38877 transitions. [2020-07-21 21:02:46,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:46,386 INFO L276 IsEmpty]: Start isEmpty. Operand 24532 states and 38877 transitions. [2020-07-21 21:02:46,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 21:02:46,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:46,412 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:46,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:46,627 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:46,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:46,628 INFO L82 PathProgramCache]: Analyzing trace with hash 296961277, now seen corresponding path program 1 times [2020-07-21 21:02:46,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:46,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108705037] [2020-07-21 21:02:46,629 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:47,007 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:47,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:47,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 21:02:47,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:47,143 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-07-21 21:02:47,144 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 21:02:47,335 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:47,397 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 21:02:47,397 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 21:02:47,399 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 21:02:47,569 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:47,620 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:02:48,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:48,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108705037] [2020-07-21 21:02:48,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:48,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-21 21:02:48,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160052822] [2020-07-21 21:02:48,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 21:02:48,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:48,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 21:02:48,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 21:02:48,721 INFO L87 Difference]: Start difference. First operand 24532 states and 38877 transitions. Second operand 13 states. [2020-07-21 21:02:48,939 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-07-21 21:02:53,602 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-07-21 21:02:55,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:55,976 INFO L93 Difference]: Finished difference Result 34329 states and 54114 transitions. [2020-07-21 21:02:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 21:02:55,977 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 485 [2020-07-21 21:02:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:56,003 INFO L225 Difference]: With dead ends: 34329 [2020-07-21 21:02:56,004 INFO L226 Difference]: Without dead ends: 32343 [2020-07-21 21:02:56,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 471 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-07-21 21:02:56,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32343 states. [2020-07-21 21:02:57,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32343 to 25896. [2020-07-21 21:02:57,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25896 states. [2020-07-21 21:02:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25896 states to 25896 states and 40853 transitions. [2020-07-21 21:02:57,365 INFO L78 Accepts]: Start accepts. Automaton has 25896 states and 40853 transitions. Word has length 485 [2020-07-21 21:02:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:57,365 INFO L479 AbstractCegarLoop]: Abstraction has 25896 states and 40853 transitions. [2020-07-21 21:02:57,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 21:02:57,365 INFO L276 IsEmpty]: Start isEmpty. Operand 25896 states and 40853 transitions. [2020-07-21 21:02:57,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 21:02:57,383 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:57,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:57,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:57,585 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:57,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1379153896, now seen corresponding path program 1 times [2020-07-21 21:02:57,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:57,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032179406] [2020-07-21 21:02:57,587 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:58,071 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:02:58,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:58,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 2943 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:02:58,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:02:58,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:58,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032179406] [2020-07-21 21:02:58,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:58,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:02:58,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695733170] [2020-07-21 21:02:58,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:02:58,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:58,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:02:58,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:02:58,268 INFO L87 Difference]: Start difference. First operand 25896 states and 40853 transitions. Second operand 4 states. [2020-07-21 21:03:00,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:03:00,745 INFO L93 Difference]: Finished difference Result 74741 states and 117861 transitions. [2020-07-21 21:03:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:03:00,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-21 21:03:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:03:00,790 INFO L225 Difference]: With dead ends: 74741 [2020-07-21 21:03:00,791 INFO L226 Difference]: Without dead ends: 49730 [2020-07-21 21:03:00,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:03:00,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49730 states. [2020-07-21 21:03:04,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49730 to 49688. [2020-07-21 21:03:04,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49688 states. [2020-07-21 21:03:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49688 states to 49688 states and 78053 transitions. [2020-07-21 21:03:04,421 INFO L78 Accepts]: Start accepts. Automaton has 49688 states and 78053 transitions. Word has length 485 [2020-07-21 21:03:04,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:03:04,422 INFO L479 AbstractCegarLoop]: Abstraction has 49688 states and 78053 transitions. [2020-07-21 21:03:04,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:03:04,422 INFO L276 IsEmpty]: Start isEmpty. Operand 49688 states and 78053 transitions. [2020-07-21 21:03:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 21:03:04,458 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:03:04,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:03:04,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:04,659 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:03:04,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:03:04,660 INFO L82 PathProgramCache]: Analyzing trace with hash 589138156, now seen corresponding path program 1 times [2020-07-21 21:03:04,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:03:04,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638579906] [2020-07-21 21:03:04,661 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:04,985 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:03:04,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:03:04,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:03:04,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:03:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:03:05,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:03:05,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638579906] [2020-07-21 21:03:05,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:03:05,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:03:05,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111648240] [2020-07-21 21:03:05,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:03:05,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:03:05,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:03:05,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:03:05,087 INFO L87 Difference]: Start difference. First operand 49688 states and 78053 transitions. Second operand 3 states. [2020-07-21 21:03:09,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:03:09,695 INFO L93 Difference]: Finished difference Result 143743 states and 225304 transitions. [2020-07-21 21:03:09,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:03:09,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2020-07-21 21:03:09,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:03:09,778 INFO L225 Difference]: With dead ends: 143743 [2020-07-21 21:03:09,778 INFO L226 Difference]: Without dead ends: 96723 [2020-07-21 21:03:09,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:03:09,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96723 states. [2020-07-21 21:03:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96723 to 50141. [2020-07-21 21:03:14,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50141 states. [2020-07-21 21:03:14,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50141 states to 50141 states and 78662 transitions. [2020-07-21 21:03:14,216 INFO L78 Accepts]: Start accepts. Automaton has 50141 states and 78662 transitions. Word has length 485 [2020-07-21 21:03:14,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:03:14,217 INFO L479 AbstractCegarLoop]: Abstraction has 50141 states and 78662 transitions. [2020-07-21 21:03:14,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:03:14,217 INFO L276 IsEmpty]: Start isEmpty. Operand 50141 states and 78662 transitions. [2020-07-21 21:03:14,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 21:03:14,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:03:14,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:03:14,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:14,484 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:03:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:03:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1457658508, now seen corresponding path program 1 times [2020-07-21 21:03:14,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:03:14,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192174753] [2020-07-21 21:03:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:14,974 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:03:14,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:03:14,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 2932 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:03:14,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:03:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:03:15,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:03:15,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192174753] [2020-07-21 21:03:15,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:03:15,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:03:15,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969351423] [2020-07-21 21:03:15,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:03:15,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:03:15,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:03:15,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:03:15,203 INFO L87 Difference]: Start difference. First operand 50141 states and 78662 transitions. Second operand 3 states. [2020-07-21 21:03:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:03:20,265 INFO L93 Difference]: Finished difference Result 144324 states and 225877 transitions. [2020-07-21 21:03:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:03:20,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2020-07-21 21:03:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:03:20,357 INFO L225 Difference]: With dead ends: 144324 [2020-07-21 21:03:20,358 INFO L226 Difference]: Without dead ends: 98132 [2020-07-21 21:03:20,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:03:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98132 states. [2020-07-21 21:03:27,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98132 to 98081. [2020-07-21 21:03:27,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98081 states. [2020-07-21 21:03:27,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98081 states to 98081 states and 153212 transitions. [2020-07-21 21:03:27,659 INFO L78 Accepts]: Start accepts. Automaton has 98081 states and 153212 transitions. Word has length 485 [2020-07-21 21:03:27,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:03:27,659 INFO L479 AbstractCegarLoop]: Abstraction has 98081 states and 153212 transitions. [2020-07-21 21:03:27,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:03:27,659 INFO L276 IsEmpty]: Start isEmpty. Operand 98081 states and 153212 transitions. [2020-07-21 21:03:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 21:03:27,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:03:27,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:03:27,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:27,934 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:03:27,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:03:27,935 INFO L82 PathProgramCache]: Analyzing trace with hash 678175951, now seen corresponding path program 1 times [2020-07-21 21:03:27,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:03:27,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610101852] [2020-07-21 21:03:27,936 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:28,263 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:03:28,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:03:28,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:03:28,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:03:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:03:28,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:03:28,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610101852] [2020-07-21 21:03:28,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:03:28,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:03:28,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435833314] [2020-07-21 21:03:28,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:03:28,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:03:28,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:03:28,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:03:28,357 INFO L87 Difference]: Start difference. First operand 98081 states and 153212 transitions. Second operand 4 states. [2020-07-21 21:03:40,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:03:40,853 INFO L93 Difference]: Finished difference Result 270682 states and 420890 transitions. [2020-07-21 21:03:40,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:03:40,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-21 21:03:40,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:03:41,018 INFO L225 Difference]: With dead ends: 270682 [2020-07-21 21:03:41,018 INFO L226 Difference]: Without dead ends: 181595 [2020-07-21 21:03:41,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:03:41,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181595 states. [2020-07-21 21:03:47,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181595 to 102248. [2020-07-21 21:03:47,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102248 states. [2020-07-21 21:03:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102248 states to 102248 states and 160002 transitions. [2020-07-21 21:03:47,550 INFO L78 Accepts]: Start accepts. Automaton has 102248 states and 160002 transitions. Word has length 485 [2020-07-21 21:03:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:03:47,550 INFO L479 AbstractCegarLoop]: Abstraction has 102248 states and 160002 transitions. [2020-07-21 21:03:47,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:03:47,551 INFO L276 IsEmpty]: Start isEmpty. Operand 102248 states and 160002 transitions. [2020-07-21 21:03:47,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 21:03:47,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:03:47,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:03:47,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:47,827 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:03:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:03:47,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1489289561, now seen corresponding path program 1 times [2020-07-21 21:03:47,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:03:47,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116453476] [2020-07-21 21:03:47,829 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:48,306 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:03:48,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:03:48,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 2946 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:03:48,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:03:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:03:48,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:03:48,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116453476] [2020-07-21 21:03:48,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:03:48,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:03:48,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042500356] [2020-07-21 21:03:48,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:03:48,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:03:48,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:03:48,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:03:48,488 INFO L87 Difference]: Start difference. First operand 102248 states and 160002 transitions. Second operand 3 states. [2020-07-21 21:04:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:04:02,539 INFO L93 Difference]: Finished difference Result 291961 states and 456163 transitions. [2020-07-21 21:04:02,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:04:02,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 21:04:02,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:04:02,739 INFO L225 Difference]: With dead ends: 291961 [2020-07-21 21:04:02,739 INFO L226 Difference]: Without dead ends: 198360 [2020-07-21 21:04:02,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:04:02,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198360 states. [2020-07-21 21:04:17,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198360 to 198320. [2020-07-21 21:04:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198320 states. [2020-07-21 21:04:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198320 states to 198320 states and 308809 transitions. [2020-07-21 21:04:17,927 INFO L78 Accepts]: Start accepts. Automaton has 198320 states and 308809 transitions. Word has length 487 [2020-07-21 21:04:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:04:17,927 INFO L479 AbstractCegarLoop]: Abstraction has 198320 states and 308809 transitions. [2020-07-21 21:04:17,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:04:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 198320 states and 308809 transitions. [2020-07-21 21:04:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 21:04:18,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:04:18,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:04:18,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:04:18,284 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:04:18,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:04:18,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1753685625, now seen corresponding path program 1 times [2020-07-21 21:04:18,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:04:18,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890600694] [2020-07-21 21:04:18,286 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:04:18,860 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:04:18,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:04:18,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:04:18,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:04:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:04:18,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:04:18,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890600694] [2020-07-21 21:04:18,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:04:18,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:04:18,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750267726] [2020-07-21 21:04:18,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:04:18,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:04:18,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:04:18,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:04:18,961 INFO L87 Difference]: Start difference. First operand 198320 states and 308809 transitions. Second operand 3 states. [2020-07-21 21:04:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:04:44,989 INFO L93 Difference]: Finished difference Result 552118 states and 855125 transitions. [2020-07-21 21:04:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:04:44,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 21:04:44,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:04:45,361 INFO L225 Difference]: With dead ends: 552118 [2020-07-21 21:04:45,361 INFO L226 Difference]: Without dead ends: 375341 [2020-07-21 21:04:45,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:04:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375341 states. [2020-07-21 21:05:00,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375341 to 201960. [2020-07-21 21:05:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201960 states. [2020-07-21 21:05:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201960 states to 201960 states and 314311 transitions. [2020-07-21 21:05:05,680 INFO L78 Accepts]: Start accepts. Automaton has 201960 states and 314311 transitions. Word has length 488 [2020-07-21 21:05:05,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:05,680 INFO L479 AbstractCegarLoop]: Abstraction has 201960 states and 314311 transitions. [2020-07-21 21:05:05,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:05,680 INFO L276 IsEmpty]: Start isEmpty. Operand 201960 states and 314311 transitions. [2020-07-21 21:05:05,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 21:05:05,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:05,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:06,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:06,036 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:06,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:06,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1118823468, now seen corresponding path program 1 times [2020-07-21 21:05:06,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:06,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160420639] [2020-07-21 21:05:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:06,499 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:06,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:06,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 2949 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:06,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:05:06,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:06,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160420639] [2020-07-21 21:05:06,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:06,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:06,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011343175] [2020-07-21 21:05:06,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:06,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:06,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:06,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:06,667 INFO L87 Difference]: Start difference. First operand 201960 states and 314311 transitions. Second operand 3 states. [2020-07-21 21:05:32,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:32,785 INFO L93 Difference]: Finished difference Result 587962 states and 913890 transitions. [2020-07-21 21:05:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:32,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 21:05:32,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:33,183 INFO L225 Difference]: With dead ends: 587962 [2020-07-21 21:05:33,183 INFO L226 Difference]: Without dead ends: 397809 [2020-07-21 21:05:33,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:33,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397809 states. [2020-07-21 21:06:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397809 to 397771. [2020-07-21 21:06:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397771 states. [2020-07-21 21:06:06,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397771 states to 397771 states and 616160 transitions. [2020-07-21 21:06:06,564 INFO L78 Accepts]: Start accepts. Automaton has 397771 states and 616160 transitions. Word has length 489 [2020-07-21 21:06:06,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:06,565 INFO L479 AbstractCegarLoop]: Abstraction has 397771 states and 616160 transitions. [2020-07-21 21:06:06,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:06:06,565 INFO L276 IsEmpty]: Start isEmpty. Operand 397771 states and 616160 transitions. [2020-07-21 21:06:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 21:06:06,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:06,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:06:07,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:07,103 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:07,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:07,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1685246199, now seen corresponding path program 1 times [2020-07-21 21:06:07,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:07,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285707473] [2020-07-21 21:06:07,105 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:07,425 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:06:07,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:07,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:06:07,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:06:07,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:07,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285707473] [2020-07-21 21:06:07,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:07,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:06:07,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601204108] [2020-07-21 21:06:07,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:06:07,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:07,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:06:07,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:07,517 INFO L87 Difference]: Start difference. First operand 397771 states and 616160 transitions. Second operand 3 states. [2020-07-21 21:07:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:07:08,834 INFO L93 Difference]: Finished difference Result 1097081 states and 1689930 transitions. [2020-07-21 21:07:08,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:07:08,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 21:07:08,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:07:09,626 INFO L225 Difference]: With dead ends: 1097081 [2020-07-21 21:07:09,626 INFO L226 Difference]: Without dead ends: 742574 [2020-07-21 21:07:09,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:07:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742574 states. [2020-07-21 21:07:49,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742574 to 405387. [2020-07-21 21:07:49,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405387 states. [2020-07-21 21:07:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405387 states to 405387 states and 625904 transitions. [2020-07-21 21:07:50,783 INFO L78 Accepts]: Start accepts. Automaton has 405387 states and 625904 transitions. Word has length 489 [2020-07-21 21:07:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:07:50,783 INFO L479 AbstractCegarLoop]: Abstraction has 405387 states and 625904 transitions. [2020-07-21 21:07:50,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:07:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand 405387 states and 625904 transitions. [2020-07-21 21:07:51,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 21:07:51,116 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:07:51,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:07:51,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:51,317 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:07:51,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:07:51,318 INFO L82 PathProgramCache]: Analyzing trace with hash -10324710, now seen corresponding path program 1 times [2020-07-21 21:07:51,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:07:51,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703356050] [2020-07-21 21:07:51,321 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:51,648 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:07:51,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:07:51,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:07:51,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:07:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:07:51,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:07:51,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703356050] [2020-07-21 21:07:51,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:07:51,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:07:51,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589227103] [2020-07-21 21:07:51,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:07:51,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:07:51,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:07:51,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:07:51,745 INFO L87 Difference]: Start difference. First operand 405387 states and 625904 transitions. Second operand 4 states. [2020-07-21 21:08:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:50,785 INFO L93 Difference]: Finished difference Result 1035517 states and 1580326 transitions. [2020-07-21 21:08:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:08:50,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-21 21:08:50,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:51,603 INFO L225 Difference]: With dead ends: 1035517 [2020-07-21 21:08:51,603 INFO L226 Difference]: Without dead ends: 731098 [2020-07-21 21:08:51,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:08:52,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731098 states. [2020-07-21 21:09:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731098 to 451667. [2020-07-21 21:09:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451667 states. [2020-07-21 21:09:44,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451667 states to 451667 states and 705568 transitions. [2020-07-21 21:09:44,926 INFO L78 Accepts]: Start accepts. Automaton has 451667 states and 705568 transitions. Word has length 490 [2020-07-21 21:09:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:09:44,927 INFO L479 AbstractCegarLoop]: Abstraction has 451667 states and 705568 transitions. [2020-07-21 21:09:44,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:09:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 451667 states and 705568 transitions. [2020-07-21 21:09:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 21:09:45,391 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:09:45,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:09:45,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:45,599 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:09:45,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:09:45,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2050798191, now seen corresponding path program 1 times [2020-07-21 21:09:45,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:09:45,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328795833] [2020-07-21 21:09:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:09:46,083 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:09:46,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:09:46,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 2952 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:09:46,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:09:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:09:46,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:09:46,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328795833] [2020-07-21 21:09:46,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:09:46,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:09:46,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831985902] [2020-07-21 21:09:46,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:09:46,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:09:46,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:09:46,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:09:46,265 INFO L87 Difference]: Start difference. First operand 451667 states and 705568 transitions. Second operand 3 states. [2020-07-21 21:11:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:11:01,522 INFO L93 Difference]: Finished difference Result 1316973 states and 2055955 transitions. [2020-07-21 21:11:01,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:11:01,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-21 21:11:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:11:02,642 INFO L225 Difference]: With dead ends: 1316973 [2020-07-21 21:11:02,642 INFO L226 Difference]: Without dead ends: 889083 [2020-07-21 21:11:02,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:11:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889083 states. [2020-07-21 21:12:34,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889083 to 889047. [2020-07-21 21:12:34,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 889047 states. [2020-07-21 21:12:36,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889047 states to 889047 states and 1382878 transitions. [2020-07-21 21:12:36,089 INFO L78 Accepts]: Start accepts. Automaton has 889047 states and 1382878 transitions. Word has length 491 [2020-07-21 21:12:36,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:12:36,090 INFO L479 AbstractCegarLoop]: Abstraction has 889047 states and 1382878 transitions. [2020-07-21 21:12:36,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:12:36,090 INFO L276 IsEmpty]: Start isEmpty. Operand 889047 states and 1382878 transitions. [2020-07-21 21:12:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 21:12:37,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:12:37,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:12:37,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:12:37,400 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:12:37,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:12:37,401 INFO L82 PathProgramCache]: Analyzing trace with hash 485741332, now seen corresponding path program 1 times [2020-07-21 21:12:37,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:12:37,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313156941] [2020-07-21 21:12:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:12:37,747 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:12:37,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:12:37,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:12:37,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:12:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:12:38,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:12:38,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313156941] [2020-07-21 21:12:38,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:12:38,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:12:38,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117813296] [2020-07-21 21:12:38,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:12:38,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:12:38,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:12:38,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:12:38,898 INFO L87 Difference]: Start difference. First operand 889047 states and 1382878 transitions. Second operand 4 states.