/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_FUNCTIONS --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 14:46:29,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:46:29,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:46:29,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:46:29,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:46:29,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:46:29,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:46:29,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:46:29,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:46:29,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:46:29,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:46:29,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:46:29,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:46:29,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:46:29,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:46:29,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:46:29,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:46:29,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:46:29,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:46:29,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:46:29,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:46:29,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:46:29,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:46:29,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:46:29,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:46:29,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 14:46:29,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 14:46:29,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 14:46:29,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 14:46:29,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 14:46:29,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 14:46:29,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 14:46:29,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 14:46:29,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:46:29,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:46:29,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:46:29,446 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 14:46:29,460 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:46:29,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:46:29,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:46:29,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:46:29,462 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:46:29,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:46:29,462 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:46:29,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:46:29,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:46:29,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:46:29,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:46:29,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:46:29,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:46:29,464 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:46:29,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:46:29,464 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:46:29,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:46:29,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:46:29,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:46:29,465 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:46:29,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:46:29,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:46:29,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:46:29,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:46:29,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:46:29,466 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:46:29,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:29,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:46:29,467 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:46:29,467 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_FUNCTIONS 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 14:46:29,773 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:46:29,789 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:46:29,792 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:46:29,794 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:46:29,794 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:46:29,796 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 14:46:29,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f24f9770/660c18a7cf464f509ce5f23c56c4cc3f/FLAG018364325 [2020-07-21 14:46:30,468 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:46:30,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 14:46:30,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f24f9770/660c18a7cf464f509ce5f23c56c4cc3f/FLAG018364325 [2020-07-21 14:46:30,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f24f9770/660c18a7cf464f509ce5f23c56c4cc3f [2020-07-21 14:46:30,668 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:46:30,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:46:30,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:46:30,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:46:30,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:46:30,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:46:30" (1/1) ... [2020-07-21 14:46:30,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d37ecf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:30, skipping insertion in model container [2020-07-21 14:46:30,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:46:30" (1/1) ... [2020-07-21 14:46:30,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:46:30,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:46:31,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:46:31,981 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:46:32,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:46:32,420 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:46:32,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:32 WrapperNode [2020-07-21 14:46:32,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:46:32,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:46:32,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:46:32,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:46:32,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:32" (1/1) ... [2020-07-21 14:46:32,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:32" (1/1) ... [2020-07-21 14:46:32,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:32" (1/1) ... [2020-07-21 14:46:32,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:32" (1/1) ... [2020-07-21 14:46:32,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:32" (1/1) ... [2020-07-21 14:46:32,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:32" (1/1) ... [2020-07-21 14:46:32,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:32" (1/1) ... [2020-07-21 14:46:32,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:46:32,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:46:32,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:46:32,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:46:32,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:32" (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 14:46:32,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:46:32,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:46:32,665 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:46:32,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:46:32,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:46:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 14:46:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 14:46:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 14:46:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 14:46:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:46:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:46:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 14:46:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 14:46:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 14:46:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 14:46:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 14:46:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 14:46:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 14:46:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 14:46:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:46:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:46:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:46:35,496 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:46:35,496 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 14:46:35,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:46:35 BoogieIcfgContainer [2020-07-21 14:46:35,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:46:35,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:46:35,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:46:35,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:46:35,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:46:30" (1/3) ... [2020-07-21 14:46:35,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26667126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:46:35, skipping insertion in model container [2020-07-21 14:46:35,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:32" (2/3) ... [2020-07-21 14:46:35,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26667126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:46:35, skipping insertion in model container [2020-07-21 14:46:35,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:46:35" (3/3) ... [2020-07-21 14:46:35,517 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 14:46:35,529 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:46:35,539 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:46:35,554 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:46:35,584 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:46:35,584 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:46:35,585 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:46:35,585 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:46:35,585 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:46:35,585 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:46:35,585 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:46:35,585 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:46:35,619 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-07-21 14:46:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 14:46:35,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:35,645 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 14:46:35,645 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:35,652 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-07-21 14:46:35,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:35,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609722871] [2020-07-21 14:46:35,662 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 14:46:36,101 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:36,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:36,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:46:36,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:36,407 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 14:46:36,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:36,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609722871] [2020-07-21 14:46:36,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:36,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:36,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974334887] [2020-07-21 14:46:36,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:36,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:36,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:36,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:36,434 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-07-21 14:46:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:36,794 INFO L93 Difference]: Finished difference Result 2320 states and 4128 transitions. [2020-07-21 14:46:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:46:36,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-21 14:46:36,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:36,825 INFO L225 Difference]: With dead ends: 2320 [2020-07-21 14:46:36,826 INFO L226 Difference]: Without dead ends: 1538 [2020-07-21 14:46:36,835 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 14:46:36,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2020-07-21 14:46:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1536. [2020-07-21 14:46:36,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1536 states. [2020-07-21 14:46:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 2382 transitions. [2020-07-21 14:46:36,986 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 2382 transitions. Word has length 326 [2020-07-21 14:46:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:36,989 INFO L479 AbstractCegarLoop]: Abstraction has 1536 states and 2382 transitions. [2020-07-21 14:46:36,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 2382 transitions. [2020-07-21 14:46:37,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 14:46:37,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:37,009 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 14:46:37,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:37,219 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:37,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2123524946, now seen corresponding path program 1 times [2020-07-21 14:46:37,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:37,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340143488] [2020-07-21 14:46:37,221 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 14:46:37,515 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:37,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:37,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:46:37,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:37,722 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 14:46:37,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:37,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340143488] [2020-07-21 14:46:37,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:37,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:37,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094700873] [2020-07-21 14:46:37,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:37,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:37,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:37,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:37,727 INFO L87 Difference]: Start difference. First operand 1536 states and 2382 transitions. Second operand 4 states. [2020-07-21 14:46:37,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:37,959 INFO L93 Difference]: Finished difference Result 4534 states and 7027 transitions. [2020-07-21 14:46:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:46:37,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-21 14:46:37,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:37,978 INFO L225 Difference]: With dead ends: 4534 [2020-07-21 14:46:37,978 INFO L226 Difference]: Without dead ends: 3014 [2020-07-21 14:46:37,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:46:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2020-07-21 14:46:38,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 3012. [2020-07-21 14:46:38,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3012 states. [2020-07-21 14:46:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 4642 transitions. [2020-07-21 14:46:38,113 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 4642 transitions. Word has length 328 [2020-07-21 14:46:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:38,114 INFO L479 AbstractCegarLoop]: Abstraction has 3012 states and 4642 transitions. [2020-07-21 14:46:38,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 4642 transitions. [2020-07-21 14:46:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 14:46:38,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:38,125 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 14:46:38,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:38,339 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:38,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:38,339 INFO L82 PathProgramCache]: Analyzing trace with hash 11355912, now seen corresponding path program 1 times [2020-07-21 14:46:38,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:38,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491040276] [2020-07-21 14:46:38,341 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 14:46:38,594 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:38,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:38,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:38,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:38,736 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 14:46:38,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:38,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491040276] [2020-07-21 14:46:38,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:38,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:38,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875154999] [2020-07-21 14:46:38,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:38,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:38,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:38,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:38,740 INFO L87 Difference]: Start difference. First operand 3012 states and 4642 transitions. Second operand 3 states. [2020-07-21 14:46:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:38,963 INFO L93 Difference]: Finished difference Result 8971 states and 13825 transitions. [2020-07-21 14:46:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:38,964 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 14:46:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:38,994 INFO L225 Difference]: With dead ends: 8971 [2020-07-21 14:46:38,994 INFO L226 Difference]: Without dead ends: 5992 [2020-07-21 14:46:39,004 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 14:46:39,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5992 states. [2020-07-21 14:46:39,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5992 to 3026. [2020-07-21 14:46:39,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3026 states. [2020-07-21 14:46:39,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 4659 transitions. [2020-07-21 14:46:39,178 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 4659 transitions. Word has length 330 [2020-07-21 14:46:39,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:39,179 INFO L479 AbstractCegarLoop]: Abstraction has 3026 states and 4659 transitions. [2020-07-21 14:46:39,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 4659 transitions. [2020-07-21 14:46:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 14:46:39,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:39,189 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 14:46:39,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:39,405 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:39,405 INFO L82 PathProgramCache]: Analyzing trace with hash 278446020, now seen corresponding path program 1 times [2020-07-21 14:46:39,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:39,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16470278] [2020-07-21 14:46:39,407 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 14:46:39,829 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:46:39,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:39,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 2056 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:46:39,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:39,963 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 14:46:39,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:39,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16470278] [2020-07-21 14:46:39,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:39,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:39,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616685472] [2020-07-21 14:46:39,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:39,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:39,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:39,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:39,967 INFO L87 Difference]: Start difference. First operand 3026 states and 4659 transitions. Second operand 3 states. [2020-07-21 14:46:40,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:40,250 INFO L93 Difference]: Finished difference Result 5698 states and 8845 transitions. [2020-07-21 14:46:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:40,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 14:46:40,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:40,273 INFO L225 Difference]: With dead ends: 5698 [2020-07-21 14:46:40,274 INFO L226 Difference]: Without dead ends: 4916 [2020-07-21 14:46:40,277 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 14:46:40,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4916 states. [2020-07-21 14:46:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4916 to 4914. [2020-07-21 14:46:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4914 states. [2020-07-21 14:46:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4914 states to 4914 states and 7555 transitions. [2020-07-21 14:46:40,557 INFO L78 Accepts]: Start accepts. Automaton has 4914 states and 7555 transitions. Word has length 332 [2020-07-21 14:46:40,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:40,560 INFO L479 AbstractCegarLoop]: Abstraction has 4914 states and 7555 transitions. [2020-07-21 14:46:40,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:40,560 INFO L276 IsEmpty]: Start isEmpty. Operand 4914 states and 7555 transitions. [2020-07-21 14:46:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 14:46:40,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:40,581 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 14:46:40,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:40,795 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:40,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:40,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1067605858, now seen corresponding path program 1 times [2020-07-21 14:46:40,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:40,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87532284] [2020-07-21 14:46:40,796 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 14:46:41,124 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:46:41,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:41,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:46:41,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:41,230 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 14:46:41,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:41,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87532284] [2020-07-21 14:46:41,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:41,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:41,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878362117] [2020-07-21 14:46:41,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:41,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:41,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:41,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:41,233 INFO L87 Difference]: Start difference. First operand 4914 states and 7555 transitions. Second operand 3 states. [2020-07-21 14:46:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:41,612 INFO L93 Difference]: Finished difference Result 10078 states and 15641 transitions. [2020-07-21 14:46:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:41,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 14:46:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:41,668 INFO L225 Difference]: With dead ends: 10078 [2020-07-21 14:46:41,668 INFO L226 Difference]: Without dead ends: 8608 [2020-07-21 14:46:41,674 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 14:46:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2020-07-21 14:46:41,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 8606. [2020-07-21 14:46:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8606 states. [2020-07-21 14:46:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8606 states to 8606 states and 13207 transitions. [2020-07-21 14:46:42,005 INFO L78 Accepts]: Start accepts. Automaton has 8606 states and 13207 transitions. Word has length 332 [2020-07-21 14:46:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:42,006 INFO L479 AbstractCegarLoop]: Abstraction has 8606 states and 13207 transitions. [2020-07-21 14:46:42,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 8606 states and 13207 transitions. [2020-07-21 14:46:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 14:46:42,024 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:42,025 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 14:46:42,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:42,238 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:42,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2097215687, now seen corresponding path program 1 times [2020-07-21 14:46:42,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:42,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766470048] [2020-07-21 14:46:42,240 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 14:46:42,579 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:46:42,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:42,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 2058 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:46:42,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:42,771 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 14:46:42,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:42,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766470048] [2020-07-21 14:46:42,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:42,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:42,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970862944] [2020-07-21 14:46:42,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:42,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:42,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:42,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:42,774 INFO L87 Difference]: Start difference. First operand 8606 states and 13207 transitions. Second operand 3 states. [2020-07-21 14:46:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:43,281 INFO L93 Difference]: Finished difference Result 18258 states and 28313 transitions. [2020-07-21 14:46:43,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:43,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 14:46:43,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:43,316 INFO L225 Difference]: With dead ends: 18258 [2020-07-21 14:46:43,316 INFO L226 Difference]: Without dead ends: 15696 [2020-07-21 14:46:43,327 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 14:46:43,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15696 states. [2020-07-21 14:46:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15696 to 15694. [2020-07-21 14:46:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15694 states. [2020-07-21 14:46:43,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15694 states to 15694 states and 24039 transitions. [2020-07-21 14:46:43,937 INFO L78 Accepts]: Start accepts. Automaton has 15694 states and 24039 transitions. Word has length 332 [2020-07-21 14:46:43,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:43,938 INFO L479 AbstractCegarLoop]: Abstraction has 15694 states and 24039 transitions. [2020-07-21 14:46:43,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:43,938 INFO L276 IsEmpty]: Start isEmpty. Operand 15694 states and 24039 transitions. [2020-07-21 14:46:43,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 14:46:43,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:43,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:44,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:44,179 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:44,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:44,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1052921786, now seen corresponding path program 1 times [2020-07-21 14:46:44,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:44,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351480282] [2020-07-21 14:46:44,182 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 14:46:44,514 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:46:44,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:44,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 2059 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:44,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:44,619 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 14:46:44,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:44,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351480282] [2020-07-21 14:46:44,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:44,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:44,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177784525] [2020-07-21 14:46:44,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:44,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:44,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:44,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:44,622 INFO L87 Difference]: Start difference. First operand 15694 states and 24039 transitions. Second operand 3 states. [2020-07-21 14:46:45,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:45,838 INFO L93 Difference]: Finished difference Result 46261 states and 70746 transitions. [2020-07-21 14:46:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:45,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 14:46:45,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:45,912 INFO L225 Difference]: With dead ends: 46261 [2020-07-21 14:46:45,912 INFO L226 Difference]: Without dead ends: 30747 [2020-07-21 14:46:45,943 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 14:46:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30747 states. [2020-07-21 14:46:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30747 to 30745. [2020-07-21 14:46:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30745 states. [2020-07-21 14:46:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30745 states to 30745 states and 46788 transitions. [2020-07-21 14:46:46,821 INFO L78 Accepts]: Start accepts. Automaton has 30745 states and 46788 transitions. Word has length 332 [2020-07-21 14:46:46,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:46,822 INFO L479 AbstractCegarLoop]: Abstraction has 30745 states and 46788 transitions. [2020-07-21 14:46:46,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:46,822 INFO L276 IsEmpty]: Start isEmpty. Operand 30745 states and 46788 transitions. [2020-07-21 14:46:46,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 14:46:46,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:46,860 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 14:46:47,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:47,070 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:47,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:47,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1231527171, now seen corresponding path program 1 times [2020-07-21 14:46:47,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:47,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937603971] [2020-07-21 14:46:47,073 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 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 14:46:47,304 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:47,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:47,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:46:47,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:47,389 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 14:46:47,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:47,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937603971] [2020-07-21 14:46:47,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:47,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:47,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014159892] [2020-07-21 14:46:47,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:47,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:47,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:47,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:47,392 INFO L87 Difference]: Start difference. First operand 30745 states and 46788 transitions. Second operand 4 states. [2020-07-21 14:46:49,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:49,537 INFO L93 Difference]: Finished difference Result 87816 states and 133432 transitions. [2020-07-21 14:46:49,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:46:49,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 14:46:49,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:49,666 INFO L225 Difference]: With dead ends: 87816 [2020-07-21 14:46:49,667 INFO L226 Difference]: Without dead ends: 57642 [2020-07-21 14:46:49,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:46:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57642 states. [2020-07-21 14:46:50,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57642 to 31119. [2020-07-21 14:46:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31119 states. [2020-07-21 14:46:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31119 states to 31119 states and 47423 transitions. [2020-07-21 14:46:50,817 INFO L78 Accepts]: Start accepts. Automaton has 31119 states and 47423 transitions. Word has length 332 [2020-07-21 14:46:50,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:50,817 INFO L479 AbstractCegarLoop]: Abstraction has 31119 states and 47423 transitions. [2020-07-21 14:46:50,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 31119 states and 47423 transitions. [2020-07-21 14:46:50,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 14:46:50,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:50,843 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 14:46:51,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:51,044 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:51,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:51,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1238819116, now seen corresponding path program 1 times [2020-07-21 14:46:51,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:51,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796508629] [2020-07-21 14:46:51,046 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 14:46:51,392 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:46:51,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:51,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 2070 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 14:46:51,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:51,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:51,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796508629] [2020-07-21 14:46:51,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:51,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 14:46:51,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286845097] [2020-07-21 14:46:51,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:46:51,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:51,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:46:51,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:46:51,785 INFO L87 Difference]: Start difference. First operand 31119 states and 47423 transitions. Second operand 8 states. [2020-07-21 14:46:59,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:59,434 INFO L93 Difference]: Finished difference Result 165871 states and 257735 transitions. [2020-07-21 14:46:59,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 14:46:59,435 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 333 [2020-07-21 14:46:59,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:59,863 INFO L225 Difference]: With dead ends: 165871 [2020-07-21 14:46:59,863 INFO L226 Difference]: Without dead ends: 155053 [2020-07-21 14:46:59,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2020-07-21 14:47:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155053 states. [2020-07-21 14:47:03,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155053 to 82799. [2020-07-21 14:47:03,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82799 states. [2020-07-21 14:47:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82799 states to 82799 states and 127215 transitions. [2020-07-21 14:47:03,631 INFO L78 Accepts]: Start accepts. Automaton has 82799 states and 127215 transitions. Word has length 333 [2020-07-21 14:47:03,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:03,632 INFO L479 AbstractCegarLoop]: Abstraction has 82799 states and 127215 transitions. [2020-07-21 14:47:03,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 14:47:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 82799 states and 127215 transitions. [2020-07-21 14:47:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 14:47:03,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:03,680 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 14:47:03,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:03,881 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:03,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:03,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1822037944, now seen corresponding path program 1 times [2020-07-21 14:47:03,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:03,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428956901] [2020-07-21 14:47:03,884 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 14:47:04,251 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:47:04,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:04,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 2069 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 14:47:04,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:04,418 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 14:47:04,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:04,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428956901] [2020-07-21 14:47:04,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:04,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 14:47:04,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973101564] [2020-07-21 14:47:04,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:47:04,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:04,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:47:04,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:47:04,420 INFO L87 Difference]: Start difference. First operand 82799 states and 127215 transitions. Second operand 8 states. [2020-07-21 14:47:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:09,762 INFO L93 Difference]: Finished difference Result 153095 states and 236099 transitions. [2020-07-21 14:47:09,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 14:47:09,762 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 333 [2020-07-21 14:47:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:09,887 INFO L225 Difference]: With dead ends: 153095 [2020-07-21 14:47:09,888 INFO L226 Difference]: Without dead ends: 73903 [2020-07-21 14:47:09,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 326 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 14:47:10,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73903 states. [2020-07-21 14:47:11,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73903 to 42569. [2020-07-21 14:47:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42569 states. [2020-07-21 14:47:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42569 states to 42569 states and 64597 transitions. [2020-07-21 14:47:12,031 INFO L78 Accepts]: Start accepts. Automaton has 42569 states and 64597 transitions. Word has length 333 [2020-07-21 14:47:12,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:12,032 INFO L479 AbstractCegarLoop]: Abstraction has 42569 states and 64597 transitions. [2020-07-21 14:47:12,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 14:47:12,032 INFO L276 IsEmpty]: Start isEmpty. Operand 42569 states and 64597 transitions. [2020-07-21 14:47:12,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 14:47:12,063 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:12,063 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 14:47:12,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:12,278 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:12,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:12,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1889731237, now seen corresponding path program 1 times [2020-07-21 14:47:12,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:12,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368807640] [2020-07-21 14:47:12,280 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 14:47:12,528 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:12,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:12,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:12,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:12,604 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 14:47:12,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:12,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368807640] [2020-07-21 14:47:12,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:12,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:12,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835911443] [2020-07-21 14:47:12,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:12,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:12,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:12,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:12,606 INFO L87 Difference]: Start difference. First operand 42569 states and 64597 transitions. Second operand 3 states. [2020-07-21 14:47:16,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:16,260 INFO L93 Difference]: Finished difference Result 97463 states and 148673 transitions. [2020-07-21 14:47:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:47:16,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 14:47:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:16,333 INFO L225 Difference]: With dead ends: 97463 [2020-07-21 14:47:16,333 INFO L226 Difference]: Without dead ends: 56833 [2020-07-21 14:47:16,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:16,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56833 states. [2020-07-21 14:47:18,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56833 to 50975. [2020-07-21 14:47:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50975 states. [2020-07-21 14:47:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50975 states to 50975 states and 78199 transitions. [2020-07-21 14:47:18,540 INFO L78 Accepts]: Start accepts. Automaton has 50975 states and 78199 transitions. Word has length 333 [2020-07-21 14:47:18,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:18,541 INFO L479 AbstractCegarLoop]: Abstraction has 50975 states and 78199 transitions. [2020-07-21 14:47:18,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:47:18,541 INFO L276 IsEmpty]: Start isEmpty. Operand 50975 states and 78199 transitions. [2020-07-21 14:47:18,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 14:47:18,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:18,570 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 14:47:18,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:18,784 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:18,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:18,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1991301752, now seen corresponding path program 1 times [2020-07-21 14:47:18,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:18,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887095718] [2020-07-21 14:47:18,787 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 14:47:19,042 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:19,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:19,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:47:19,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:19,125 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 14:47:19,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:19,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887095718] [2020-07-21 14:47:19,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:19,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:47:19,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032370574] [2020-07-21 14:47:19,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:47:19,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:19,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:47:19,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:47:19,128 INFO L87 Difference]: Start difference. First operand 50975 states and 78199 transitions. Second operand 4 states. [2020-07-21 14:47:21,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:21,466 INFO L93 Difference]: Finished difference Result 103301 states and 158328 transitions. [2020-07-21 14:47:21,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:47:21,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 14:47:21,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:21,521 INFO L225 Difference]: With dead ends: 103301 [2020-07-21 14:47:21,521 INFO L226 Difference]: Without dead ends: 51994 [2020-07-21 14:47:21,555 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 14:47:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51994 states. [2020-07-21 14:47:23,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51994 to 51992. [2020-07-21 14:47:23,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51992 states. [2020-07-21 14:47:23,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51992 states to 51992 states and 79317 transitions. [2020-07-21 14:47:23,567 INFO L78 Accepts]: Start accepts. Automaton has 51992 states and 79317 transitions. Word has length 334 [2020-07-21 14:47:23,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:23,567 INFO L479 AbstractCegarLoop]: Abstraction has 51992 states and 79317 transitions. [2020-07-21 14:47:23,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:47:23,567 INFO L276 IsEmpty]: Start isEmpty. Operand 51992 states and 79317 transitions. [2020-07-21 14:47:23,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 14:47:23,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:23,590 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 14:47:23,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:23,791 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:23,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:23,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1378209289, now seen corresponding path program 1 times [2020-07-21 14:47:23,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:23,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996503937] [2020-07-21 14:47:23,793 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 14:47:24,266 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:24,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:24,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:47:24,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:24,341 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 14:47:24,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:24,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996503937] [2020-07-21 14:47:24,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:24,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:47:24,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492154919] [2020-07-21 14:47:24,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:47:24,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:24,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:47:24,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:47:24,344 INFO L87 Difference]: Start difference. First operand 51992 states and 79317 transitions. Second operand 4 states. [2020-07-21 14:47:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:29,372 INFO L93 Difference]: Finished difference Result 154363 states and 235262 transitions. [2020-07-21 14:47:29,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:47:29,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 14:47:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:29,493 INFO L225 Difference]: With dead ends: 154363 [2020-07-21 14:47:29,493 INFO L226 Difference]: Without dead ends: 103493 [2020-07-21 14:47:29,541 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 14:47:29,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103493 states. [2020-07-21 14:47:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103493 to 53047. [2020-07-21 14:47:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53047 states. [2020-07-21 14:47:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53047 states to 53047 states and 81054 transitions. [2020-07-21 14:47:32,293 INFO L78 Accepts]: Start accepts. Automaton has 53047 states and 81054 transitions. Word has length 334 [2020-07-21 14:47:32,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:32,294 INFO L479 AbstractCegarLoop]: Abstraction has 53047 states and 81054 transitions. [2020-07-21 14:47:32,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:47:32,294 INFO L276 IsEmpty]: Start isEmpty. Operand 53047 states and 81054 transitions. [2020-07-21 14:47:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 14:47:32,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:32,316 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 14:47:32,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:32,517 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:32,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:32,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1887228463, now seen corresponding path program 1 times [2020-07-21 14:47:32,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:32,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690051108] [2020-07-21 14:47:32,519 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 14:47:32,871 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:47:32,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:32,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:47:32,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:33,029 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 14:47:33,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:33,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690051108] [2020-07-21 14:47:33,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:33,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:47:33,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349970458] [2020-07-21 14:47:33,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:47:33,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:33,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:47:33,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:47:33,032 INFO L87 Difference]: Start difference. First operand 53047 states and 81054 transitions. Second operand 4 states. [2020-07-21 14:47:37,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:37,808 INFO L93 Difference]: Finished difference Result 128251 states and 198112 transitions. [2020-07-21 14:47:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:47:37,808 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-21 14:47:37,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:37,918 INFO L225 Difference]: With dead ends: 128251 [2020-07-21 14:47:37,919 INFO L226 Difference]: Without dead ends: 100953 [2020-07-21 14:47:37,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:47:38,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100953 states. [2020-07-21 14:47:44,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100953 to 100951. [2020-07-21 14:47:44,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100951 states. [2020-07-21 14:47:44,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100951 states to 100951 states and 153950 transitions. [2020-07-21 14:47:44,539 INFO L78 Accepts]: Start accepts. Automaton has 100951 states and 153950 transitions. Word has length 336 [2020-07-21 14:47:44,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:44,540 INFO L479 AbstractCegarLoop]: Abstraction has 100951 states and 153950 transitions. [2020-07-21 14:47:44,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:47:44,540 INFO L276 IsEmpty]: Start isEmpty. Operand 100951 states and 153950 transitions. [2020-07-21 14:47:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 14:47:44,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:44,581 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 14:47:44,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:44,783 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:44,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1824520005, now seen corresponding path program 1 times [2020-07-21 14:47:44,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:44,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137164442] [2020-07-21 14:47:44,784 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 14:47:45,137 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:47:45,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:45,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 2074 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:47:45,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:45,388 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 14:47:45,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:45,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137164442] [2020-07-21 14:47:45,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:45,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:47:45,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510050819] [2020-07-21 14:47:45,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:47:45,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:45,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:47:45,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:47:45,390 INFO L87 Difference]: Start difference. First operand 100951 states and 153950 transitions. Second operand 5 states. [2020-07-21 14:47:56,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:56,651 INFO L93 Difference]: Finished difference Result 247110 states and 381475 transitions. [2020-07-21 14:47:56,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:47:56,651 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2020-07-21 14:47:56,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:57,127 INFO L225 Difference]: With dead ends: 247110 [2020-07-21 14:47:57,128 INFO L226 Difference]: Without dead ends: 192452 [2020-07-21 14:47:57,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 332 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 14:47:57,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192452 states. [2020-07-21 14:48:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192452 to 192450. [2020-07-21 14:48:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192450 states. [2020-07-21 14:48:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192450 states to 192450 states and 293537 transitions. [2020-07-21 14:48:11,181 INFO L78 Accepts]: Start accepts. Automaton has 192450 states and 293537 transitions. Word has length 336 [2020-07-21 14:48:11,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:11,182 INFO L479 AbstractCegarLoop]: Abstraction has 192450 states and 293537 transitions. [2020-07-21 14:48:11,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:48:11,182 INFO L276 IsEmpty]: Start isEmpty. Operand 192450 states and 293537 transitions. [2020-07-21 14:48:11,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 14:48:11,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:11,272 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 14:48:11,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:11,474 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:11,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1990380256, now seen corresponding path program 1 times [2020-07-21 14:48:11,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:11,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540165144] [2020-07-21 14:48:11,476 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 14:48:11,830 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:48:11,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:11,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:48:11,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:11,940 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 14:48:11,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:11,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540165144] [2020-07-21 14:48:11,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:11,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:48:11,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376888307] [2020-07-21 14:48:11,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:48:11,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:11,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:48:11,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:11,943 INFO L87 Difference]: Start difference. First operand 192450 states and 293537 transitions. Second operand 3 states. [2020-07-21 14:48:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:33,258 INFO L93 Difference]: Finished difference Result 543116 states and 827636 transitions. [2020-07-21 14:48:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:48:33,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 14:48:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:33,705 INFO L225 Difference]: With dead ends: 543116 [2020-07-21 14:48:33,705 INFO L226 Difference]: Without dead ends: 353275 [2020-07-21 14:48:33,845 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 14:48:34,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353275 states. [2020-07-21 14:48:59,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353275 to 353273. [2020-07-21 14:48:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353273 states. [2020-07-21 14:49:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353273 states to 353273 states and 535472 transitions. [2020-07-21 14:49:00,261 INFO L78 Accepts]: Start accepts. Automaton has 353273 states and 535472 transitions. Word has length 336 [2020-07-21 14:49:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:49:00,261 INFO L479 AbstractCegarLoop]: Abstraction has 353273 states and 535472 transitions. [2020-07-21 14:49:00,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:49:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 353273 states and 535472 transitions. [2020-07-21 14:49:00,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 14:49:00,416 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:49:00,416 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 14:49:00,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:00,624 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:49:00,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:49:00,625 INFO L82 PathProgramCache]: Analyzing trace with hash 254978979, now seen corresponding path program 1 times [2020-07-21 14:49:00,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:49:00,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789880527] [2020-07-21 14:49:00,625 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 14:49:00,874 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:49:00,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:49:00,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:49:00,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:49:00,934 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 14:49:00,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:49:00,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789880527] [2020-07-21 14:49:00,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:49:00,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:49:00,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735214881] [2020-07-21 14:49:00,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:49:00,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:49:00,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:49:00,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:00,937 INFO L87 Difference]: Start difference. First operand 353273 states and 535472 transitions. Second operand 3 states. [2020-07-21 14:49:49,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:49:49,131 INFO L93 Difference]: Finished difference Result 1056182 states and 1600145 transitions. [2020-07-21 14:49:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:49:49,132 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 14:49:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:49:50,166 INFO L225 Difference]: With dead ends: 1056182 [2020-07-21 14:49:50,166 INFO L226 Difference]: Without dead ends: 704767 [2020-07-21 14:49:50,446 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 14:49:50,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704767 states. [2020-07-21 14:50:24,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704767 to 353491. [2020-07-21 14:50:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353491 states. [2020-07-21 14:50:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353491 states to 353491 states and 535722 transitions. [2020-07-21 14:50:24,937 INFO L78 Accepts]: Start accepts. Automaton has 353491 states and 535722 transitions. Word has length 336 [2020-07-21 14:50:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:50:24,938 INFO L479 AbstractCegarLoop]: Abstraction has 353491 states and 535722 transitions. [2020-07-21 14:50:24,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:50:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 353491 states and 535722 transitions. [2020-07-21 14:50:25,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 14:50:25,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:50:25,090 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 14:50:25,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:50:25,296 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:50:25,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:50:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1115988535, now seen corresponding path program 1 times [2020-07-21 14:50:25,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:50:25,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540325146] [2020-07-21 14:50:25,298 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 14:50:25,531 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:50:25,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:50:25,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:50:25,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:50:25,612 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 14:50:25,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:50:25,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540325146] [2020-07-21 14:50:25,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:50:25,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:50:25,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717002563] [2020-07-21 14:50:25,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:50:25,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:50:25,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:50:25,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:50:25,622 INFO L87 Difference]: Start difference. First operand 353491 states and 535722 transitions. Second operand 3 states. [2020-07-21 14:51:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:51:13,401 INFO L93 Difference]: Finished difference Result 1054205 states and 1597098 transitions. [2020-07-21 14:51:13,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:51:13,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 14:51:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:51:14,322 INFO L225 Difference]: With dead ends: 1054205 [2020-07-21 14:51:14,322 INFO L226 Difference]: Without dead ends: 703562 [2020-07-21 14:51:14,593 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 14:51:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703562 states. [2020-07-21 14:51:48,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703562 to 353815. [2020-07-21 14:51:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353815 states. [2020-07-21 14:51:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353815 states to 353815 states and 536101 transitions. [2020-07-21 14:51:50,041 INFO L78 Accepts]: Start accepts. Automaton has 353815 states and 536101 transitions. Word has length 336 [2020-07-21 14:51:50,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:51:50,041 INFO L479 AbstractCegarLoop]: Abstraction has 353815 states and 536101 transitions. [2020-07-21 14:51:50,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:51:50,041 INFO L276 IsEmpty]: Start isEmpty. Operand 353815 states and 536101 transitions. [2020-07-21 14:51:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 14:51:50,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:51:50,186 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 14:51:50,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:51:50,387 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:51:50,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:51:50,388 INFO L82 PathProgramCache]: Analyzing trace with hash -321463587, now seen corresponding path program 1 times [2020-07-21 14:51:50,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:51:50,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176765730] [2020-07-21 14:51:50,388 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 14:51:50,741 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:51:50,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:51:50,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:51:50,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:51:50,833 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 14:51:50,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:51:50,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176765730] [2020-07-21 14:51:50,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:51:50,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:51:50,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364725746] [2020-07-21 14:51:50,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:51:50,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:51:50,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:51:50,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:51:50,835 INFO L87 Difference]: Start difference. First operand 353815 states and 536101 transitions. Second operand 3 states. [2020-07-21 14:52:38,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:52:38,704 INFO L93 Difference]: Finished difference Result 1038013 states and 1569901 transitions. [2020-07-21 14:52:38,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:52:38,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 14:52:38,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:52:39,623 INFO L225 Difference]: With dead ends: 1038013 [2020-07-21 14:52:39,623 INFO L226 Difference]: Without dead ends: 687467 [2020-07-21 14:52:39,886 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 14:52:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687467 states. [2020-07-21 14:53:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687467 to 687465. [2020-07-21 14:53:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687465 states. [2020-07-21 14:53:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687465 states to 687465 states and 1033605 transitions. [2020-07-21 14:53:46,517 INFO L78 Accepts]: Start accepts. Automaton has 687465 states and 1033605 transitions. Word has length 336 [2020-07-21 14:53:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:53:46,517 INFO L479 AbstractCegarLoop]: Abstraction has 687465 states and 1033605 transitions. [2020-07-21 14:53:46,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:53:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 687465 states and 1033605 transitions. [2020-07-21 14:53:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 14:53:46,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:53:46,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:53:47,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:53:47,044 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:53:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:53:47,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1721157595, now seen corresponding path program 1 times [2020-07-21 14:53:47,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:53:47,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192739899] [2020-07-21 14:53:47,046 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 14:53:47,406 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:53:47,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:53:47,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:53:47,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:53:47,576 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 14:53:47,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:53:47,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192739899] [2020-07-21 14:53:47,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:53:47,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 14:53:47,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259606193] [2020-07-21 14:53:47,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:53:47,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:53:47,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:53:47,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:53:47,578 INFO L87 Difference]: Start difference. First operand 687465 states and 1033605 transitions. Second operand 9 states.