/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:29:21,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:29:21,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:29:21,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:29:21,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:29:21,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:29:21,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:29:21,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:29:21,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:29:21,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:29:21,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:29:21,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:29:21,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:29:21,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:29:21,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:29:21,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:29:21,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:29:21,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:29:21,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:29:21,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:29:21,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:29:21,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:29:21,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:29:21,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:29:21,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 17:29:21,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 17:29:21,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 17:29:21,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 17:29:21,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 17:29:21,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 17:29:21,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 17:29:21,421 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 17:29:21,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 17:29:21,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 17:29:21,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 17:29:21,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 17:29:21,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 17:29:21,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 17:29:21,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:29:21,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:29:21,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:29:21,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 17:29:21,441 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:29:21,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:29:21,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:29:21,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:29:21,443 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:29:21,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:29:21,443 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:29:21,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:29:21,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:29:21,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:29:21,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:29:21,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:29:21,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:29:21,445 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:29:21,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:29:21,445 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:29:21,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:29:21,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:29:21,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:29:21,446 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:29:21,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:29:21,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:29:21,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:29:21,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:29:21,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:29:21,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:29:21,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:21,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:29:21,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:29:21,448 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 17:29:21,705 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:29:21,723 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:29:21,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:29:21,728 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:29:21,729 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:29:21,731 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 17:29:21,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e8179acb/6b0cbd0a9ead41788a08f5845207beb9/FLAG96ac4873c [2020-07-21 17:29:22,421 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:29:22,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 17:29:22,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e8179acb/6b0cbd0a9ead41788a08f5845207beb9/FLAG96ac4873c [2020-07-21 17:29:22,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e8179acb/6b0cbd0a9ead41788a08f5845207beb9 [2020-07-21 17:29:22,635 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:29:22,638 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:29:22,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:29:22,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:29:22,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:29:22,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:29:22" (1/1) ... [2020-07-21 17:29:22,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a47a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:22, skipping insertion in model container [2020-07-21 17:29:22,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:29:22" (1/1) ... [2020-07-21 17:29:22,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:29:22,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:29:23,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:29:23,847 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:29:24,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:29:24,339 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:29:24,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24 WrapperNode [2020-07-21 17:29:24,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:29:24,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:29:24,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:29:24,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:29:24,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (1/1) ... [2020-07-21 17:29:24,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (1/1) ... [2020-07-21 17:29:24,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (1/1) ... [2020-07-21 17:29:24,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (1/1) ... [2020-07-21 17:29:24,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (1/1) ... [2020-07-21 17:29:24,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (1/1) ... [2020-07-21 17:29:24,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (1/1) ... [2020-07-21 17:29:24,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:29:24,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:29:24,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:29:24,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:29:24,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:29:24,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:29:24,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:29:24,684 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:29:24,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:29:24,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:29:24,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 17:29:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 17:29:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 17:29:24,688 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 17:29:24,688 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:29:24,689 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:29:24,689 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 17:29:24,690 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 17:29:24,690 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 17:29:24,690 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 17:29:24,691 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 17:29:24,692 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 17:29:24,692 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 17:29:24,692 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 17:29:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:29:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:29:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:29:27,282 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:29:27,282 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 17:29:27,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:29:27 BoogieIcfgContainer [2020-07-21 17:29:27,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:29:27,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:29:27,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:29:27,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:29:27,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:29:22" (1/3) ... [2020-07-21 17:29:27,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652801f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:29:27, skipping insertion in model container [2020-07-21 17:29:27,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:29:24" (2/3) ... [2020-07-21 17:29:27,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652801f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:29:27, skipping insertion in model container [2020-07-21 17:29:27,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:29:27" (3/3) ... [2020-07-21 17:29:27,300 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 17:29:27,310 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:29:27,320 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:29:27,332 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:29:27,358 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:29:27,358 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:29:27,359 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:29:27,359 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:29:27,359 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:29:27,359 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:29:27,359 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:29:27,359 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:29:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-07-21 17:29:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 17:29:27,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:27,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:27,444 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:27,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:27,449 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-07-21 17:29:27,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:27,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905564764] [2020-07-21 17:29:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:27,898 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:27,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:27,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:29:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:28,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:28,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905564764] [2020-07-21 17:29:28,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:28,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:28,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988114297] [2020-07-21 17:29:28,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:28,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:28,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:28,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:28,152 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 3 states. [2020-07-21 17:29:28,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:28,459 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-07-21 17:29:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:28,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 17:29:28,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:28,502 INFO L225 Difference]: With dead ends: 1489 [2020-07-21 17:29:28,502 INFO L226 Difference]: Without dead ends: 1273 [2020-07-21 17:29:28,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-07-21 17:29:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-07-21 17:29:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-07-21 17:29:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-07-21 17:29:28,694 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-07-21 17:29:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:28,699 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-07-21 17:29:28,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-07-21 17:29:28,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 17:29:28,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:28,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:28,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:28,926 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:28,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:28,927 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-07-21 17:29:28,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:28,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591991887] [2020-07-21 17:29:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:29,264 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:29,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:29,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:29:29,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:29,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:29,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591991887] [2020-07-21 17:29:29,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:29,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:29,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936788167] [2020-07-21 17:29:29,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:29,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:29,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:29,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:29,456 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 3 states. [2020-07-21 17:29:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:29,640 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-07-21 17:29:29,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:29,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 17:29:29,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:29,655 INFO L225 Difference]: With dead ends: 2607 [2020-07-21 17:29:29,655 INFO L226 Difference]: Without dead ends: 2225 [2020-07-21 17:29:29,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-07-21 17:29:29,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-07-21 17:29:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-07-21 17:29:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-07-21 17:29:29,742 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-07-21 17:29:29,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:29,743 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-07-21 17:29:29,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-07-21 17:29:29,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 17:29:29,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:29,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:29,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:29,966 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:29,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:29,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-07-21 17:29:29,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:29,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492423335] [2020-07-21 17:29:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:30,293 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:30,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:30,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:29:30,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:30,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:30,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492423335] [2020-07-21 17:29:30,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:30,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:30,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635614465] [2020-07-21 17:29:30,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:30,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:30,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:30,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:30,402 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 3 states. [2020-07-21 17:29:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:30,640 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-07-21 17:29:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:30,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 17:29:30,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:30,662 INFO L225 Difference]: With dead ends: 4715 [2020-07-21 17:29:30,663 INFO L226 Difference]: Without dead ends: 4049 [2020-07-21 17:29:30,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-07-21 17:29:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-07-21 17:29:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-07-21 17:29:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-07-21 17:29:30,847 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-07-21 17:29:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:30,848 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-07-21 17:29:30,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-07-21 17:29:30,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 17:29:30,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:30,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:31,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:31,071 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:31,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:31,072 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-07-21 17:29:31,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:31,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963942848] [2020-07-21 17:29:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:31,442 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:31,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:31,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:29:31,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:31,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:31,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963942848] [2020-07-21 17:29:31,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:31,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:29:31,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287929763] [2020-07-21 17:29:31,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:29:31,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:31,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:29:31,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:29:31,625 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 4 states. [2020-07-21 17:29:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:32,017 INFO L93 Difference]: Finished difference Result 11998 states and 18565 transitions. [2020-07-21 17:29:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:29:32,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-21 17:29:32,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:32,054 INFO L225 Difference]: With dead ends: 11998 [2020-07-21 17:29:32,054 INFO L226 Difference]: Without dead ends: 7966 [2020-07-21 17:29:32,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:29:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2020-07-21 17:29:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 7964. [2020-07-21 17:29:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7964 states. [2020-07-21 17:29:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 12270 transitions. [2020-07-21 17:29:32,378 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 12270 transitions. Word has length 326 [2020-07-21 17:29:32,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:32,378 INFO L479 AbstractCegarLoop]: Abstraction has 7964 states and 12270 transitions. [2020-07-21 17:29:32,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:29:32,379 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 12270 transitions. [2020-07-21 17:29:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 17:29:32,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:32,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:32,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:32,614 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:32,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:32,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1396966584, now seen corresponding path program 1 times [2020-07-21 17:29:32,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:32,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796692077] [2020-07-21 17:29:32,616 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:33,080 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:33,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:33,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:29:33,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:33,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:33,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796692077] [2020-07-21 17:29:33,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:33,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:33,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996479038] [2020-07-21 17:29:33,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:33,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:33,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:33,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:33,208 INFO L87 Difference]: Start difference. First operand 7964 states and 12270 transitions. Second operand 3 states. [2020-07-21 17:29:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:33,664 INFO L93 Difference]: Finished difference Result 23441 states and 36046 transitions. [2020-07-21 17:29:33,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:33,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 17:29:33,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:33,727 INFO L225 Difference]: With dead ends: 23441 [2020-07-21 17:29:33,727 INFO L226 Difference]: Without dead ends: 15606 [2020-07-21 17:29:33,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2020-07-21 17:29:34,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 15604. [2020-07-21 17:29:34,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15604 states. [2020-07-21 17:29:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15604 states to 15604 states and 23893 transitions. [2020-07-21 17:29:34,271 INFO L78 Accepts]: Start accepts. Automaton has 15604 states and 23893 transitions. Word has length 328 [2020-07-21 17:29:34,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:34,272 INFO L479 AbstractCegarLoop]: Abstraction has 15604 states and 23893 transitions. [2020-07-21 17:29:34,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 15604 states and 23893 transitions. [2020-07-21 17:29:34,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 17:29:34,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:34,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:34,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:34,514 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:34,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:34,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1164802445, now seen corresponding path program 1 times [2020-07-21 17:29:34,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:34,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730637369] [2020-07-21 17:29:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:34,774 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:34,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:34,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:29:34,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:34,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:34,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730637369] [2020-07-21 17:29:34,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:34,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:34,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369190884] [2020-07-21 17:29:34,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:34,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:34,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:34,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:34,939 INFO L87 Difference]: Start difference. First operand 15604 states and 23893 transitions. Second operand 3 states. [2020-07-21 17:29:35,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:35,506 INFO L93 Difference]: Finished difference Result 46735 states and 71549 transitions. [2020-07-21 17:29:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:35,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 17:29:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:35,584 INFO L225 Difference]: With dead ends: 46735 [2020-07-21 17:29:35,584 INFO L226 Difference]: Without dead ends: 31170 [2020-07-21 17:29:35,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31170 states. [2020-07-21 17:29:36,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31170 to 15618. [2020-07-21 17:29:36,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15618 states. [2020-07-21 17:29:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15618 states to 15618 states and 23910 transitions. [2020-07-21 17:29:36,406 INFO L78 Accepts]: Start accepts. Automaton has 15618 states and 23910 transitions. Word has length 328 [2020-07-21 17:29:36,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:36,407 INFO L479 AbstractCegarLoop]: Abstraction has 15618 states and 23910 transitions. [2020-07-21 17:29:36,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:36,407 INFO L276 IsEmpty]: Start isEmpty. Operand 15618 states and 23910 transitions. [2020-07-21 17:29:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-21 17:29:36,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:36,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:36,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:36,649 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:36,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:36,650 INFO L82 PathProgramCache]: Analyzing trace with hash -45408789, now seen corresponding path program 1 times [2020-07-21 17:29:36,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:36,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141978425] [2020-07-21 17:29:36,651 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:36,975 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:36,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:36,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 2054 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:29:36,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:37,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:37,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141978425] [2020-07-21 17:29:37,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:37,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:37,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785121030] [2020-07-21 17:29:37,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:37,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:37,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:37,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:37,049 INFO L87 Difference]: Start difference. First operand 15618 states and 23910 transitions. Second operand 3 states. [2020-07-21 17:29:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:38,163 INFO L93 Difference]: Finished difference Result 46757 states and 71579 transitions. [2020-07-21 17:29:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:38,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-07-21 17:29:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:38,215 INFO L225 Difference]: With dead ends: 46757 [2020-07-21 17:29:38,215 INFO L226 Difference]: Without dead ends: 31193 [2020-07-21 17:29:38,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:38,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31193 states. [2020-07-21 17:29:38,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31193 to 15641. [2020-07-21 17:29:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15641 states. [2020-07-21 17:29:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15641 states to 15641 states and 23942 transitions. [2020-07-21 17:29:39,074 INFO L78 Accepts]: Start accepts. Automaton has 15641 states and 23942 transitions. Word has length 329 [2020-07-21 17:29:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:39,074 INFO L479 AbstractCegarLoop]: Abstraction has 15641 states and 23942 transitions. [2020-07-21 17:29:39,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 15641 states and 23942 transitions. [2020-07-21 17:29:39,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:29:39,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:39,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:39,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:39,312 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:39,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:39,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1733447043, now seen corresponding path program 1 times [2020-07-21 17:29:39,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:39,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036177074] [2020-07-21 17:29:39,313 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:39,656 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:39,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 2055 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:29:39,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:39,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:39,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036177074] [2020-07-21 17:29:39,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:39,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:39,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777694839] [2020-07-21 17:29:39,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:39,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:39,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:39,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:39,760 INFO L87 Difference]: Start difference. First operand 15641 states and 23942 transitions. Second operand 3 states. [2020-07-21 17:29:40,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:40,477 INFO L93 Difference]: Finished difference Result 44290 states and 67647 transitions. [2020-07-21 17:29:40,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:40,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 17:29:40,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:40,517 INFO L225 Difference]: With dead ends: 44290 [2020-07-21 17:29:40,517 INFO L226 Difference]: Without dead ends: 28894 [2020-07-21 17:29:40,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:40,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28894 states. [2020-07-21 17:29:41,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28894 to 28892. [2020-07-21 17:29:41,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28892 states. [2020-07-21 17:29:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28892 states to 28892 states and 43902 transitions. [2020-07-21 17:29:41,294 INFO L78 Accepts]: Start accepts. Automaton has 28892 states and 43902 transitions. Word has length 330 [2020-07-21 17:29:41,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:41,294 INFO L479 AbstractCegarLoop]: Abstraction has 28892 states and 43902 transitions. [2020-07-21 17:29:41,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 28892 states and 43902 transitions. [2020-07-21 17:29:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:29:41,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:41,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:41,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:41,523 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:41,524 INFO L82 PathProgramCache]: Analyzing trace with hash -2142783200, now seen corresponding path program 1 times [2020-07-21 17:29:41,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:41,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284408029] [2020-07-21 17:29:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:41,802 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:41,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:41,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 1483 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:29:41,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:41,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:41,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284408029] [2020-07-21 17:29:41,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:41,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:29:41,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870457992] [2020-07-21 17:29:41,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:29:41,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:42,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:29:42,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:29:42,000 INFO L87 Difference]: Start difference. First operand 28892 states and 43902 transitions. Second operand 4 states. [2020-07-21 17:29:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:43,906 INFO L93 Difference]: Finished difference Result 83880 states and 127255 transitions. [2020-07-21 17:29:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:29:43,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 17:29:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:43,978 INFO L225 Difference]: With dead ends: 83880 [2020-07-21 17:29:43,978 INFO L226 Difference]: Without dead ends: 55528 [2020-07-21 17:29:44,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:29:44,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55528 states. [2020-07-21 17:29:44,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55528 to 29127. [2020-07-21 17:29:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29127 states. [2020-07-21 17:29:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29127 states to 29127 states and 44290 transitions. [2020-07-21 17:29:44,999 INFO L78 Accepts]: Start accepts. Automaton has 29127 states and 44290 transitions. Word has length 330 [2020-07-21 17:29:44,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:44,999 INFO L479 AbstractCegarLoop]: Abstraction has 29127 states and 44290 transitions. [2020-07-21 17:29:44,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:29:44,999 INFO L276 IsEmpty]: Start isEmpty. Operand 29127 states and 44290 transitions. [2020-07-21 17:29:45,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 17:29:45,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:45,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:45,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:45,222 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:45,223 INFO L82 PathProgramCache]: Analyzing trace with hash 82673009, now seen corresponding path program 1 times [2020-07-21 17:29:45,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:45,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235341953] [2020-07-21 17:29:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:45,690 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:45,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:45,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 2066 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:29:45,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:45,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:45,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235341953] [2020-07-21 17:29:45,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:45,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 17:29:45,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458093064] [2020-07-21 17:29:45,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 17:29:45,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:45,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 17:29:45,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 17:29:45,908 INFO L87 Difference]: Start difference. First operand 29127 states and 44290 transitions. Second operand 8 states. [2020-07-21 17:29:49,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:49,712 INFO L93 Difference]: Finished difference Result 90625 states and 140538 transitions. [2020-07-21 17:29:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 17:29:49,713 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 331 [2020-07-21 17:29:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:49,797 INFO L225 Difference]: With dead ends: 90625 [2020-07-21 17:29:49,798 INFO L226 Difference]: Without dead ends: 63381 [2020-07-21 17:29:49,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 17:29:49,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63381 states. [2020-07-21 17:29:52,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63381 to 38547. [2020-07-21 17:29:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38547 states. [2020-07-21 17:29:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38547 states to 38547 states and 58310 transitions. [2020-07-21 17:29:52,367 INFO L78 Accepts]: Start accepts. Automaton has 38547 states and 58310 transitions. Word has length 331 [2020-07-21 17:29:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:52,368 INFO L479 AbstractCegarLoop]: Abstraction has 38547 states and 58310 transitions. [2020-07-21 17:29:52,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 17:29:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 38547 states and 58310 transitions. [2020-07-21 17:29:52,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 17:29:52,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:52,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:52,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:52,604 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:52,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1997769565, now seen corresponding path program 1 times [2020-07-21 17:29:52,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:52,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808108589] [2020-07-21 17:29:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:53,101 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:53,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:53,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 2063 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:29:53,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:53,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:53,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808108589] [2020-07-21 17:29:53,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:53,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:53,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699330875] [2020-07-21 17:29:53,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:53,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:53,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:53,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:53,180 INFO L87 Difference]: Start difference. First operand 38547 states and 58310 transitions. Second operand 3 states. [2020-07-21 17:29:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:55,092 INFO L93 Difference]: Finished difference Result 87409 states and 132864 transitions. [2020-07-21 17:29:55,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:55,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-21 17:29:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:55,151 INFO L225 Difference]: With dead ends: 87409 [2020-07-21 17:29:55,151 INFO L226 Difference]: Without dead ends: 50641 [2020-07-21 17:29:55,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50641 states. [2020-07-21 17:29:58,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50641 to 45279. [2020-07-21 17:29:58,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45279 states. [2020-07-21 17:29:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45279 states to 45279 states and 69040 transitions. [2020-07-21 17:29:58,298 INFO L78 Accepts]: Start accepts. Automaton has 45279 states and 69040 transitions. Word has length 331 [2020-07-21 17:29:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:58,298 INFO L479 AbstractCegarLoop]: Abstraction has 45279 states and 69040 transitions. [2020-07-21 17:29:58,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 45279 states and 69040 transitions. [2020-07-21 17:29:58,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 17:29:58,324 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:58,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:58,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:58,539 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:58,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:58,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2085960752, now seen corresponding path program 1 times [2020-07-21 17:29:58,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:58,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016352343] [2020-07-21 17:29:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:58,848 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:58,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:58,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1789 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:29:58,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:58,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:58,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016352343] [2020-07-21 17:29:58,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:58,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:58,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288466518] [2020-07-21 17:29:58,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:58,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:58,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:58,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:58,929 INFO L87 Difference]: Start difference. First operand 45279 states and 69040 transitions. Second operand 3 states. [2020-07-21 17:30:02,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:30:02,502 INFO L93 Difference]: Finished difference Result 134275 states and 204421 transitions. [2020-07-21 17:30:02,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:30:02,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 17:30:02,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:30:02,611 INFO L225 Difference]: With dead ends: 134275 [2020-07-21 17:30:02,611 INFO L226 Difference]: Without dead ends: 89784 [2020-07-21 17:30:02,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:30:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89784 states. [2020-07-21 17:30:04,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89784 to 45376. [2020-07-21 17:30:04,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45376 states. [2020-07-21 17:30:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45376 states to 45376 states and 69166 transitions. [2020-07-21 17:30:05,016 INFO L78 Accepts]: Start accepts. Automaton has 45376 states and 69166 transitions. Word has length 332 [2020-07-21 17:30:05,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:30:05,022 INFO L479 AbstractCegarLoop]: Abstraction has 45376 states and 69166 transitions. [2020-07-21 17:30:05,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:30:05,022 INFO L276 IsEmpty]: Start isEmpty. Operand 45376 states and 69166 transitions. [2020-07-21 17:30:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 17:30:05,049 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:30:05,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:30:05,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:05,263 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:30:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:30:05,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1319252653, now seen corresponding path program 1 times [2020-07-21 17:30:05,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:30:05,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516781744] [2020-07-21 17:30:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:05,594 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:30:05,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:30:05,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:30:05,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:30:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:30:05,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:30:05,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516781744] [2020-07-21 17:30:05,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:30:05,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:30:05,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102773914] [2020-07-21 17:30:05,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:30:05,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:30:05,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:30:05,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:30:05,986 INFO L87 Difference]: Start difference. First operand 45376 states and 69166 transitions. Second operand 4 states. [2020-07-21 17:30:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:30:07,870 INFO L93 Difference]: Finished difference Result 92130 states and 140286 transitions. [2020-07-21 17:30:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:30:07,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-21 17:30:07,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:30:07,923 INFO L225 Difference]: With dead ends: 92130 [2020-07-21 17:30:07,923 INFO L226 Difference]: Without dead ends: 46284 [2020-07-21 17:30:07,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:30:07,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46284 states. [2020-07-21 17:30:11,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46284 to 46282. [2020-07-21 17:30:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46282 states. [2020-07-21 17:30:11,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46282 states to 46282 states and 70196 transitions. [2020-07-21 17:30:11,158 INFO L78 Accepts]: Start accepts. Automaton has 46282 states and 70196 transitions. Word has length 333 [2020-07-21 17:30:11,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:30:11,158 INFO L479 AbstractCegarLoop]: Abstraction has 46282 states and 70196 transitions. [2020-07-21 17:30:11,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:30:11,158 INFO L276 IsEmpty]: Start isEmpty. Operand 46282 states and 70196 transitions. [2020-07-21 17:30:11,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 17:30:11,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:30:11,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:30:11,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:11,379 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:30:11,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:30:11,379 INFO L82 PathProgramCache]: Analyzing trace with hash 433660810, now seen corresponding path program 1 times [2020-07-21 17:30:11,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:30:11,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051571369] [2020-07-21 17:30:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:11,676 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:30:11,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:30:11,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1792 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:30:11,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:30:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:30:11,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:30:11,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051571369] [2020-07-21 17:30:11,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:30:11,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:30:11,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291544336] [2020-07-21 17:30:11,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:30:11,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:30:11,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:30:11,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:30:11,750 INFO L87 Difference]: Start difference. First operand 46282 states and 70196 transitions. Second operand 3 states. [2020-07-21 17:30:15,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:30:15,695 INFO L93 Difference]: Finished difference Result 138343 states and 209766 transitions. [2020-07-21 17:30:15,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:30:15,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 17:30:15,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:30:15,790 INFO L225 Difference]: With dead ends: 138343 [2020-07-21 17:30:15,791 INFO L226 Difference]: Without dead ends: 92139 [2020-07-21 17:30:15,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:30:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92139 states. [2020-07-21 17:30:19,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92139 to 46263. [2020-07-21 17:30:19,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46263 states. [2020-07-21 17:30:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46263 states to 46263 states and 70154 transitions. [2020-07-21 17:30:19,945 INFO L78 Accepts]: Start accepts. Automaton has 46263 states and 70154 transitions. Word has length 334 [2020-07-21 17:30:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:30:19,945 INFO L479 AbstractCegarLoop]: Abstraction has 46263 states and 70154 transitions. [2020-07-21 17:30:19,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:30:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 46263 states and 70154 transitions. [2020-07-21 17:30:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 17:30:19,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:30:19,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:30:20,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:20,164 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:30:20,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:30:20,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1874773864, now seen corresponding path program 1 times [2020-07-21 17:30:20,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:30:20,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368808371] [2020-07-21 17:30:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:20,407 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:30:20,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:30:20,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:30:20,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:30:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:30:20,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:30:20,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368808371] [2020-07-21 17:30:20,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:30:20,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 17:30:20,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332525195] [2020-07-21 17:30:20,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:30:20,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:30:20,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:30:20,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:30:20,524 INFO L87 Difference]: Start difference. First operand 46263 states and 70154 transitions. Second operand 9 states. [2020-07-21 17:30:34,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:30:34,202 INFO L93 Difference]: Finished difference Result 211537 states and 329116 transitions. [2020-07-21 17:30:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-21 17:30:34,203 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 334 [2020-07-21 17:30:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:30:34,452 INFO L225 Difference]: With dead ends: 211537 [2020-07-21 17:30:34,453 INFO L226 Difference]: Without dead ends: 196703 [2020-07-21 17:30:34,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 17:30:34,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196703 states. [2020-07-21 17:30:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196703 to 93717. [2020-07-21 17:30:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93717 states. [2020-07-21 17:30:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93717 states to 93717 states and 143100 transitions. [2020-07-21 17:30:42,671 INFO L78 Accepts]: Start accepts. Automaton has 93717 states and 143100 transitions. Word has length 334 [2020-07-21 17:30:42,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:30:42,671 INFO L479 AbstractCegarLoop]: Abstraction has 93717 states and 143100 transitions. [2020-07-21 17:30:42,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:30:42,671 INFO L276 IsEmpty]: Start isEmpty. Operand 93717 states and 143100 transitions. [2020-07-21 17:30:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 17:30:42,705 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:30:42,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:30:42,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:42,906 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:30:42,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:30:42,907 INFO L82 PathProgramCache]: Analyzing trace with hash -846358176, now seen corresponding path program 1 times [2020-07-21 17:30:42,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:30:42,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60965835] [2020-07-21 17:30:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:43,247 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:30:43,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:30:43,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:30:43,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:30:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:30:43,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:30:43,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60965835] [2020-07-21 17:30:43,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:30:43,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:30:43,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234136725] [2020-07-21 17:30:43,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:30:43,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:30:43,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:30:43,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:30:43,326 INFO L87 Difference]: Start difference. First operand 93717 states and 143100 transitions. Second operand 3 states. [2020-07-21 17:30:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:30:51,418 INFO L93 Difference]: Finished difference Result 235669 states and 361830 transitions. [2020-07-21 17:30:51,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:30:51,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 17:30:51,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:30:51,585 INFO L225 Difference]: With dead ends: 235669 [2020-07-21 17:30:51,586 INFO L226 Difference]: Without dead ends: 144925 [2020-07-21 17:30:51,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:30:51,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144925 states. [2020-07-21 17:31:02,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144925 to 128403. [2020-07-21 17:31:02,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128403 states. [2020-07-21 17:31:02,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128403 states to 128403 states and 198118 transitions. [2020-07-21 17:31:03,000 INFO L78 Accepts]: Start accepts. Automaton has 128403 states and 198118 transitions. Word has length 334 [2020-07-21 17:31:03,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:31:03,000 INFO L479 AbstractCegarLoop]: Abstraction has 128403 states and 198118 transitions. [2020-07-21 17:31:03,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:31:03,000 INFO L276 IsEmpty]: Start isEmpty. Operand 128403 states and 198118 transitions. [2020-07-21 17:31:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 17:31:03,036 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:31:03,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:31:03,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:31:03,241 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:31:03,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:31:03,242 INFO L82 PathProgramCache]: Analyzing trace with hash 924020310, now seen corresponding path program 1 times [2020-07-21 17:31:03,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:31:03,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044580377] [2020-07-21 17:31:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:31:03,589 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:31:03,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:31:03,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 2071 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:31:03,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:31:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:31:03,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:31:03,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044580377] [2020-07-21 17:31:03,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:31:03,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:31:03,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470592750] [2020-07-21 17:31:03,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:31:03,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:31:03,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:31:03,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:31:03,784 INFO L87 Difference]: Start difference. First operand 128403 states and 198118 transitions. Second operand 5 states. [2020-07-21 17:31:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:31:19,531 INFO L93 Difference]: Finished difference Result 336780 states and 525416 transitions. [2020-07-21 17:31:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:31:19,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-07-21 17:31:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:31:19,825 INFO L225 Difference]: With dead ends: 336780 [2020-07-21 17:31:19,825 INFO L226 Difference]: Without dead ends: 248930 [2020-07-21 17:31:19,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:31:20,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248930 states. [2020-07-21 17:31:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248930 to 248928. [2020-07-21 17:31:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248928 states. [2020-07-21 17:31:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248928 states to 248928 states and 384221 transitions. [2020-07-21 17:31:39,866 INFO L78 Accepts]: Start accepts. Automaton has 248928 states and 384221 transitions. Word has length 334 [2020-07-21 17:31:39,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:31:39,866 INFO L479 AbstractCegarLoop]: Abstraction has 248928 states and 384221 transitions. [2020-07-21 17:31:39,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:31:39,867 INFO L276 IsEmpty]: Start isEmpty. Operand 248928 states and 384221 transitions. [2020-07-21 17:31:39,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 17:31:39,945 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:31:39,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:31:40,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:31:40,147 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:31:40,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:31:40,147 INFO L82 PathProgramCache]: Analyzing trace with hash 2073937905, now seen corresponding path program 1 times [2020-07-21 17:31:40,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:31:40,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706229387] [2020-07-21 17:31:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:31:40,502 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:31:40,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:31:40,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:31:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:31:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:31:40,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:31:40,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706229387] [2020-07-21 17:31:40,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:31:40,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:31:40,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244166407] [2020-07-21 17:31:40,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:31:40,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:31:40,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:31:40,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:31:40,588 INFO L87 Difference]: Start difference. First operand 248928 states and 384221 transitions. Second operand 4 states. [2020-07-21 17:32:15,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:15,338 INFO L93 Difference]: Finished difference Result 736739 states and 1137130 transitions. [2020-07-21 17:32:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:32:15,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 17:32:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:15,984 INFO L225 Difference]: With dead ends: 736739 [2020-07-21 17:32:15,984 INFO L226 Difference]: Without dead ends: 488030 [2020-07-21 17:32:16,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:32:16,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488030 states. [2020-07-21 17:33:01,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488030 to 488028. [2020-07-21 17:33:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488028 states. [2020-07-21 17:33:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488028 states to 488028 states and 750484 transitions. [2020-07-21 17:33:01,848 INFO L78 Accepts]: Start accepts. Automaton has 488028 states and 750484 transitions. Word has length 334 [2020-07-21 17:33:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:01,848 INFO L479 AbstractCegarLoop]: Abstraction has 488028 states and 750484 transitions. [2020-07-21 17:33:01,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:33:01,848 INFO L276 IsEmpty]: Start isEmpty. Operand 488028 states and 750484 transitions. [2020-07-21 17:33:01,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 17:33:01,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:01,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:02,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:02,187 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:02,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1885331745, now seen corresponding path program 1 times [2020-07-21 17:33:02,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:02,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757681573] [2020-07-21 17:33:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:02,487 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:33:02,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:02,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 1795 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:33:02,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:02,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:02,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757681573] [2020-07-21 17:33:02,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:02,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:33:02,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631504314] [2020-07-21 17:33:02,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:33:02,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:02,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:33:02,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:33:02,550 INFO L87 Difference]: Start difference. First operand 488028 states and 750484 transitions. Second operand 4 states. [2020-07-21 17:34:30,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:34:30,623 INFO L93 Difference]: Finished difference Result 1461117 states and 2246599 transitions. [2020-07-21 17:34:30,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:34:30,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-21 17:34:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:34:32,129 INFO L225 Difference]: With dead ends: 1461117 [2020-07-21 17:34:32,129 INFO L226 Difference]: Without dead ends: 974466 [2020-07-21 17:34:32,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:34:33,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974466 states. [2020-07-21 17:35:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974466 to 489171. [2020-07-21 17:35:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489171 states. [2020-07-21 17:35:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489171 states to 489171 states and 752243 transitions. [2020-07-21 17:35:24,763 INFO L78 Accepts]: Start accepts. Automaton has 489171 states and 752243 transitions. Word has length 335 [2020-07-21 17:35:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:35:24,763 INFO L479 AbstractCegarLoop]: Abstraction has 489171 states and 752243 transitions. [2020-07-21 17:35:24,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:35:24,763 INFO L276 IsEmpty]: Start isEmpty. Operand 489171 states and 752243 transitions. [2020-07-21 17:35:24,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 17:35:24,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:35:24,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:35:25,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:35:25,109 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:35:25,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:35:25,110 INFO L82 PathProgramCache]: Analyzing trace with hash -321463587, now seen corresponding path program 1 times [2020-07-21 17:35:25,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:35:25,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588715165] [2020-07-21 17:35:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:35:25,466 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:35:25,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:35:25,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:35:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:35:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:35:25,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:35:25,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588715165] [2020-07-21 17:35:25,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:35:25,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:35:25,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974353300] [2020-07-21 17:35:25,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:35:25,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:35:25,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:35:25,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:35:25,577 INFO L87 Difference]: Start difference. First operand 489171 states and 752243 transitions. Second operand 3 states. [2020-07-21 17:36:54,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:54,231 INFO L93 Difference]: Finished difference Result 1446414 states and 2224825 transitions. [2020-07-21 17:36:54,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:36:54,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 17:36:54,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:55,728 INFO L225 Difference]: With dead ends: 1446414 [2020-07-21 17:36:55,728 INFO L226 Difference]: Without dead ends: 960203 [2020-07-21 17:36:56,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:56,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960203 states. [2020-07-21 17:38:35,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960203 to 960201. [2020-07-21 17:38:35,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 960201 states. [2020-07-21 17:38:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960201 states to 960201 states and 1472345 transitions. [2020-07-21 17:38:37,197 INFO L78 Accepts]: Start accepts. Automaton has 960201 states and 1472345 transitions. Word has length 336 [2020-07-21 17:38:37,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:38:37,197 INFO L479 AbstractCegarLoop]: Abstraction has 960201 states and 1472345 transitions. [2020-07-21 17:38:37,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:38:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 960201 states and 1472345 transitions. [2020-07-21 17:38:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 17:38:37,546 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:38:37,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:38:37,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:38:37,747 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:38:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:38:37,748 INFO L82 PathProgramCache]: Analyzing trace with hash 393392538, now seen corresponding path program 1 times [2020-07-21 17:38:37,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:38:37,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498323827] [2020-07-21 17:38:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:38:38,062 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:38:38,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:38:38,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 1795 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:38:38,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:38:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:38:39,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:38:39,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498323827] [2020-07-21 17:38:39,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:38:39,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:38:39,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200603934] [2020-07-21 17:38:39,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:38:39,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:38:39,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:38:39,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:38:39,324 INFO L87 Difference]: Start difference. First operand 960201 states and 1472345 transitions. Second operand 3 states.