/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.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:54:13,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:54:13,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:54:13,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:54:13,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:54:13,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:54:13,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:54:13,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:54:13,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:54:13,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:54:13,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:54:13,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:54:13,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:54:13,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:54:13,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:54:13,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:54:13,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:54:13,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:54:13,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:54:13,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:54:13,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:54:13,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:54:13,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:54:13,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:54:13,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:54:13,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:54:13,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:54:13,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:54:13,527 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 14:54:13,542 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:54:13,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:54:13,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:54:13,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:54:13,543 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:54:13,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:54:13,544 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:54:13,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:54:13,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:54:13,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:54:13,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:54:13,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:54:13,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:54:13,545 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:54:13,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:54:13,545 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:54:13,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:54:13,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:54:13,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:54:13,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:54:13,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:54:13,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:54:13,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:54:13,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:54:13,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:54:13,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:54:13,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:13,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:54:13,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:54:13,548 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 14:54:13,827 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:54:13,840 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:54:13,843 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:54:13,845 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:54:13,845 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:54:13,846 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 14:54:13,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de4b0b98d/786d4af59aa14935a9020e342ea751d2/FLAG56a070d13 [2020-07-21 14:54:14,622 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:54:14,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 14:54:14,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de4b0b98d/786d4af59aa14935a9020e342ea751d2/FLAG56a070d13 [2020-07-21 14:54:14,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de4b0b98d/786d4af59aa14935a9020e342ea751d2 [2020-07-21 14:54:14,747 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:54:14,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:54:14,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:54:14,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:54:14,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:54:14,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:54:14" (1/1) ... [2020-07-21 14:54:14,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d0f554d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:54:14, skipping insertion in model container [2020-07-21 14:54:14,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:54:14" (1/1) ... [2020-07-21 14:54:14,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:54:15,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:54:17,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:54:17,429 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:54:19,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:54:19,177 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:54:19,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:54:19 WrapperNode [2020-07-21 14:54:19,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:54:19,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:54:19,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:54:19,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:54:19,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:54:19" (1/1) ... [2020-07-21 14:54:19,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:54:19" (1/1) ... [2020-07-21 14:54:19,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:54:19" (1/1) ... [2020-07-21 14:54:19,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:54:19" (1/1) ... [2020-07-21 14:54:19,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:54:19" (1/1) ... [2020-07-21 14:54:19,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:54:19" (1/1) ... [2020-07-21 14:54:19,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:54:19" (1/1) ... [2020-07-21 14:54:19,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:54:19,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:54:19,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:54:19,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:54:19,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:54:19" (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 14:54:19,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:54:19,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:54:19,612 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:54:19,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:54:19,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:54:19,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 14:54:19,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 14:54:19,614 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 14:54:19,614 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:54:19,615 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:54:19,615 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 14:54:19,616 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 14:54:19,616 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 14:54:19,616 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 14:54:19,616 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 14:54:19,617 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 14:54:19,617 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 14:54:19,617 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 14:54:19,617 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 14:54:19,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:54:19,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:54:19,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:54:26,523 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:54:26,524 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 14:54:26,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:54:26 BoogieIcfgContainer [2020-07-21 14:54:26,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:54:26,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:54:26,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:54:26,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:54:26,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:54:14" (1/3) ... [2020-07-21 14:54:26,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2895dcea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:54:26, skipping insertion in model container [2020-07-21 14:54:26,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:54:19" (2/3) ... [2020-07-21 14:54:26,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2895dcea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:54:26, skipping insertion in model container [2020-07-21 14:54:26,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:54:26" (3/3) ... [2020-07-21 14:54:26,559 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 14:54:26,571 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:54:26,584 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 14:54:26,600 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 14:54:26,637 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:54:26,637 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:54:26,637 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:54:26,638 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:54:26,638 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:54:26,638 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:54:26,638 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:54:26,638 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:54:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states. [2020-07-21 14:54:26,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 14:54:26,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:26,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:54:26,725 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:26,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:26,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1936618047, now seen corresponding path program 1 times [2020-07-21 14:54:26,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:26,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884747506] [2020-07-21 14:54:26,741 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 14:54:27,325 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:27,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:27,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 1663 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:54:27,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:27,560 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 14:54:27,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:27,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884747506] [2020-07-21 14:54:27,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:27,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:54:27,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556165285] [2020-07-21 14:54:27,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:54:27,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:27,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:54:27,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:54:27,586 INFO L87 Difference]: Start difference. First operand 2515 states. Second operand 4 states. [2020-07-21 14:54:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:27,824 INFO L93 Difference]: Finished difference Result 4047 states and 7028 transitions. [2020-07-21 14:54:27,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:54:27,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-07-21 14:54:27,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:27,857 INFO L225 Difference]: With dead ends: 4047 [2020-07-21 14:54:27,857 INFO L226 Difference]: Without dead ends: 2511 [2020-07-21 14:54:27,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 319 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 14:54:27,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-21 14:54:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-21 14:54:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-21 14:54:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4372 transitions. [2020-07-21 14:54:28,013 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4372 transitions. Word has length 322 [2020-07-21 14:54:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:28,014 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4372 transitions. [2020-07-21 14:54:28,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:54:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4372 transitions. [2020-07-21 14:54:28,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 14:54:28,024 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:28,025 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] [2020-07-21 14:54:28,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:28,239 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:28,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:28,240 INFO L82 PathProgramCache]: Analyzing trace with hash 237230463, now seen corresponding path program 1 times [2020-07-21 14:54:28,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:28,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987557090] [2020-07-21 14:54:28,241 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 14:54:28,749 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:28,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:28,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 1675 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:54:28,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:28,899 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 14:54:28,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:28,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987557090] [2020-07-21 14:54:28,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:28,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:54:28,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457867966] [2020-07-21 14:54:28,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:54:28,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:28,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:54:28,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:54:28,907 INFO L87 Difference]: Start difference. First operand 2511 states and 4372 transitions. Second operand 4 states. [2020-07-21 14:54:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:29,010 INFO L93 Difference]: Finished difference Result 2952 states and 5121 transitions. [2020-07-21 14:54:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:54:29,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-07-21 14:54:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:29,028 INFO L225 Difference]: With dead ends: 2952 [2020-07-21 14:54:29,028 INFO L226 Difference]: Without dead ends: 2511 [2020-07-21 14:54:29,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:54:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-21 14:54:29,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-21 14:54:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-21 14:54:29,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4362 transitions. [2020-07-21 14:54:29,111 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4362 transitions. Word has length 331 [2020-07-21 14:54:29,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:29,116 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4362 transitions. [2020-07-21 14:54:29,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:54:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4362 transitions. [2020-07-21 14:54:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-21 14:54:29,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:29,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:54:29,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:29,344 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:29,346 INFO L82 PathProgramCache]: Analyzing trace with hash 670276166, now seen corresponding path program 1 times [2020-07-21 14:54:29,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:29,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978891092] [2020-07-21 14:54:29,348 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 14:54:29,814 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:29,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:29,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 1681 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:54:29,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:54:29,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:29,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978891092] [2020-07-21 14:54:29,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:29,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:54:29,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340814418] [2020-07-21 14:54:29,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:54:29,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:29,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:54:29,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:54:29,919 INFO L87 Difference]: Start difference. First operand 2511 states and 4362 transitions. Second operand 4 states. [2020-07-21 14:54:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:30,041 INFO L93 Difference]: Finished difference Result 3386 states and 5843 transitions. [2020-07-21 14:54:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:54:30,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-21 14:54:30,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:30,056 INFO L225 Difference]: With dead ends: 3386 [2020-07-21 14:54:30,057 INFO L226 Difference]: Without dead ends: 2511 [2020-07-21 14:54:30,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:54:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-21 14:54:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-21 14:54:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-21 14:54:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4352 transitions. [2020-07-21 14:54:30,142 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4352 transitions. Word has length 340 [2020-07-21 14:54:30,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:30,143 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4352 transitions. [2020-07-21 14:54:30,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:54:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4352 transitions. [2020-07-21 14:54:30,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-07-21 14:54:30,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:30,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:54:30,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:30,369 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:30,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:30,370 INFO L82 PathProgramCache]: Analyzing trace with hash 908469997, now seen corresponding path program 1 times [2020-07-21 14:54:30,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:30,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318407166] [2020-07-21 14:54:30,372 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 14:54:30,919 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:30,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:30,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 14:54:30,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:31,022 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 14:54:31,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:31,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318407166] [2020-07-21 14:54:31,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:31,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:54:31,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330372190] [2020-07-21 14:54:31,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:54:31,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:31,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:54:31,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:54:31,026 INFO L87 Difference]: Start difference. First operand 2511 states and 4352 transitions. Second operand 4 states. [2020-07-21 14:54:31,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:31,256 INFO L93 Difference]: Finished difference Result 4471 states and 7668 transitions. [2020-07-21 14:54:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:54:31,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 349 [2020-07-21 14:54:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:31,271 INFO L225 Difference]: With dead ends: 4471 [2020-07-21 14:54:31,271 INFO L226 Difference]: Without dead ends: 2511 [2020-07-21 14:54:31,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 346 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 14:54:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-21 14:54:31,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-21 14:54:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-21 14:54:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4287 transitions. [2020-07-21 14:54:31,350 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4287 transitions. Word has length 349 [2020-07-21 14:54:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:31,351 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4287 transitions. [2020-07-21 14:54:31,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:54:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4287 transitions. [2020-07-21 14:54:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-07-21 14:54:31,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:31,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:54:31,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:31,581 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:31,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1212317298, now seen corresponding path program 1 times [2020-07-21 14:54:31,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:31,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559561614] [2020-07-21 14:54:31,583 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 14:54:32,078 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:32,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:32,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:54:32,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:32,238 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 14:54:32,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:32,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559561614] [2020-07-21 14:54:32,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:32,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:54:32,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446864030] [2020-07-21 14:54:32,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:54:32,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:32,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:54:32,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:54:32,243 INFO L87 Difference]: Start difference. First operand 2511 states and 4287 transitions. Second operand 4 states. [2020-07-21 14:54:32,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:32,340 INFO L93 Difference]: Finished difference Result 3820 states and 6500 transitions. [2020-07-21 14:54:32,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:54:32,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 413 [2020-07-21 14:54:32,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:32,354 INFO L225 Difference]: With dead ends: 3820 [2020-07-21 14:54:32,357 INFO L226 Difference]: Without dead ends: 2511 [2020-07-21 14:54:32,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 410 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 14:54:32,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-21 14:54:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-21 14:54:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-21 14:54:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4277 transitions. [2020-07-21 14:54:32,433 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4277 transitions. Word has length 413 [2020-07-21 14:54:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:32,434 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4277 transitions. [2020-07-21 14:54:32,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:54:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4277 transitions. [2020-07-21 14:54:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-21 14:54:32,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:32,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:54:32,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:32,662 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:32,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:32,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1663791229, now seen corresponding path program 1 times [2020-07-21 14:54:32,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:32,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238063238] [2020-07-21 14:54:32,663 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 14:54:33,170 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:33,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:33,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:54:33,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:33,316 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 14:54:33,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:33,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238063238] [2020-07-21 14:54:33,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:33,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:54:33,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750836520] [2020-07-21 14:54:33,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:54:33,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:33,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:54:33,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:54:33,321 INFO L87 Difference]: Start difference. First operand 2511 states and 4277 transitions. Second operand 4 states. [2020-07-21 14:54:33,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:33,422 INFO L93 Difference]: Finished difference Result 4254 states and 7212 transitions. [2020-07-21 14:54:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:54:33,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 422 [2020-07-21 14:54:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:33,436 INFO L225 Difference]: With dead ends: 4254 [2020-07-21 14:54:33,437 INFO L226 Difference]: Without dead ends: 2511 [2020-07-21 14:54:33,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 419 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 14:54:33,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-21 14:54:33,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-21 14:54:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-21 14:54:33,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4267 transitions. [2020-07-21 14:54:33,516 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4267 transitions. Word has length 422 [2020-07-21 14:54:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:33,517 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4267 transitions. [2020-07-21 14:54:33,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:54:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4267 transitions. [2020-07-21 14:54:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-07-21 14:54:33,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:33,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:54:33,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:33,746 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:33,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:33,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1813220086, now seen corresponding path program 1 times [2020-07-21 14:54:33,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:33,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496422269] [2020-07-21 14:54:33,748 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 14:54:34,260 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:34,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:34,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 1733 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:54:34,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:34,508 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 14:54:34,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:34,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496422269] [2020-07-21 14:54:34,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:34,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:54:34,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427443090] [2020-07-21 14:54:34,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:54:34,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:34,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:54:34,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:54:34,512 INFO L87 Difference]: Start difference. First operand 2511 states and 4267 transitions. Second operand 3 states. [2020-07-21 14:54:34,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:34,937 INFO L93 Difference]: Finished difference Result 5037 states and 8527 transitions. [2020-07-21 14:54:34,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:54:34,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 431 [2020-07-21 14:54:34,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:34,957 INFO L225 Difference]: With dead ends: 5037 [2020-07-21 14:54:34,958 INFO L226 Difference]: Without dead ends: 3945 [2020-07-21 14:54:34,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 429 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 14:54:34,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3945 states. [2020-07-21 14:54:35,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3945 to 3207. [2020-07-21 14:54:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3207 states. [2020-07-21 14:54:35,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 5441 transitions. [2020-07-21 14:54:35,097 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 5441 transitions. Word has length 431 [2020-07-21 14:54:35,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:35,098 INFO L479 AbstractCegarLoop]: Abstraction has 3207 states and 5441 transitions. [2020-07-21 14:54:35,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:54:35,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 5441 transitions. [2020-07-21 14:54:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-07-21 14:54:35,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:35,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:54:35,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:35,323 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:35,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:35,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1735373930, now seen corresponding path program 1 times [2020-07-21 14:54:35,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:35,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010094395] [2020-07-21 14:54:35,324 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 14:54:35,784 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:35,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:35,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1734 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:54:35,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:36,005 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 14:54:36,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:36,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010094395] [2020-07-21 14:54:36,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:36,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:54:36,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898900734] [2020-07-21 14:54:36,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:54:36,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:36,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:54:36,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:54:36,015 INFO L87 Difference]: Start difference. First operand 3207 states and 5441 transitions. Second operand 3 states. [2020-07-21 14:54:36,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:36,359 INFO L93 Difference]: Finished difference Result 6850 states and 11582 transitions. [2020-07-21 14:54:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:54:36,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 434 [2020-07-21 14:54:36,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:36,402 INFO L225 Difference]: With dead ends: 6850 [2020-07-21 14:54:36,402 INFO L226 Difference]: Without dead ends: 5225 [2020-07-21 14:54:36,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 432 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 14:54:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5225 states. [2020-07-21 14:54:36,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5225 to 4481. [2020-07-21 14:54:36,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4481 states. [2020-07-21 14:54:36,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4481 states to 4481 states and 7589 transitions. [2020-07-21 14:54:36,548 INFO L78 Accepts]: Start accepts. Automaton has 4481 states and 7589 transitions. Word has length 434 [2020-07-21 14:54:36,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:36,548 INFO L479 AbstractCegarLoop]: Abstraction has 4481 states and 7589 transitions. [2020-07-21 14:54:36,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:54:36,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4481 states and 7589 transitions. [2020-07-21 14:54:36,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-07-21 14:54:36,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:36,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:54:36,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:36,774 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:36,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:36,776 INFO L82 PathProgramCache]: Analyzing trace with hash -272374755, now seen corresponding path program 1 times [2020-07-21 14:54:36,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:36,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923660899] [2020-07-21 14:54:36,777 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 14:54:37,213 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:37,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:37,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:54:37,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:54:37,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:37,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923660899] [2020-07-21 14:54:37,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:37,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:54:37,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451506320] [2020-07-21 14:54:37,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:54:37,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:37,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:54:37,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:54:37,380 INFO L87 Difference]: Start difference. First operand 4481 states and 7589 transitions. Second operand 3 states. [2020-07-21 14:54:37,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:37,738 INFO L93 Difference]: Finished difference Result 9953 states and 16806 transitions. [2020-07-21 14:54:37,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:54:37,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 437 [2020-07-21 14:54:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:37,757 INFO L225 Difference]: With dead ends: 9953 [2020-07-21 14:54:37,757 INFO L226 Difference]: Without dead ends: 7341 [2020-07-21 14:54:37,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 435 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 14:54:37,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7341 states. [2020-07-21 14:54:37,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7341 to 6671. [2020-07-21 14:54:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6671 states. [2020-07-21 14:54:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 11277 transitions. [2020-07-21 14:54:37,963 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 11277 transitions. Word has length 437 [2020-07-21 14:54:37,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:37,964 INFO L479 AbstractCegarLoop]: Abstraction has 6671 states and 11277 transitions. [2020-07-21 14:54:37,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:54:37,964 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 11277 transitions. [2020-07-21 14:54:37,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2020-07-21 14:54:37,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:37,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:54:38,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:38,194 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:38,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:38,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2066993163, now seen corresponding path program 1 times [2020-07-21 14:54:38,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:38,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579718200] [2020-07-21 14:54:38,195 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 14:54:38,646 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:38,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:38,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:54:38,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:38,797 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 14:54:38,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:38,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579718200] [2020-07-21 14:54:38,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:38,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:54:38,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550563195] [2020-07-21 14:54:38,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:54:38,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:38,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:54:38,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:54:38,799 INFO L87 Difference]: Start difference. First operand 6671 states and 11277 transitions. Second operand 3 states. [2020-07-21 14:54:39,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:39,176 INFO L93 Difference]: Finished difference Result 15156 states and 25552 transitions. [2020-07-21 14:54:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:54:39,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 440 [2020-07-21 14:54:39,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:39,208 INFO L225 Difference]: With dead ends: 15156 [2020-07-21 14:54:39,208 INFO L226 Difference]: Without dead ends: 10809 [2020-07-21 14:54:39,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 438 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 14:54:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10809 states. [2020-07-21 14:54:39,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10809 to 10211. [2020-07-21 14:54:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10211 states. [2020-07-21 14:54:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10211 states to 10211 states and 17225 transitions. [2020-07-21 14:54:39,587 INFO L78 Accepts]: Start accepts. Automaton has 10211 states and 17225 transitions. Word has length 440 [2020-07-21 14:54:39,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:39,588 INFO L479 AbstractCegarLoop]: Abstraction has 10211 states and 17225 transitions. [2020-07-21 14:54:39,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:54:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 10211 states and 17225 transitions. [2020-07-21 14:54:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2020-07-21 14:54:39,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:39,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:54:39,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:39,822 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:39,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:39,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1306640956, now seen corresponding path program 1 times [2020-07-21 14:54:39,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:39,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977684602] [2020-07-21 14:54:39,826 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 14:54:40,277 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:40,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:40,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:54:40,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:40,432 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 14:54:40,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:40,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977684602] [2020-07-21 14:54:40,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:40,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:54:40,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485254220] [2020-07-21 14:54:40,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:54:40,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:40,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:54:40,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:54:40,435 INFO L87 Difference]: Start difference. First operand 10211 states and 17225 transitions. Second operand 3 states. [2020-07-21 14:54:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:40,942 INFO L93 Difference]: Finished difference Result 23273 states and 39154 transitions. [2020-07-21 14:54:40,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:54:40,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 443 [2020-07-21 14:54:40,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:40,981 INFO L225 Difference]: With dead ends: 23273 [2020-07-21 14:54:40,981 INFO L226 Difference]: Without dead ends: 16017 [2020-07-21 14:54:41,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 441 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 14:54:41,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16017 states. [2020-07-21 14:54:42,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16017 to 15487. [2020-07-21 14:54:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15487 states. [2020-07-21 14:54:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15487 states to 15487 states and 26053 transitions. [2020-07-21 14:54:42,335 INFO L78 Accepts]: Start accepts. Automaton has 15487 states and 26053 transitions. Word has length 443 [2020-07-21 14:54:42,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:42,336 INFO L479 AbstractCegarLoop]: Abstraction has 15487 states and 26053 transitions. [2020-07-21 14:54:42,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:54:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 15487 states and 26053 transitions. [2020-07-21 14:54:42,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-07-21 14:54:42,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:42,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:54:42,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:42,571 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:42,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:42,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1144720896, now seen corresponding path program 1 times [2020-07-21 14:54:42,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:42,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397177319] [2020-07-21 14:54:42,572 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 14:54:43,009 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:43,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:43,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:54:43,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:43,175 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 14:54:43,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:43,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397177319] [2020-07-21 14:54:43,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:43,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:54:43,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507415819] [2020-07-21 14:54:43,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:54:43,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:43,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:54:43,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:54:43,179 INFO L87 Difference]: Start difference. First operand 15487 states and 26053 transitions. Second operand 3 states. [2020-07-21 14:54:43,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:43,720 INFO L93 Difference]: Finished difference Result 34554 states and 57942 transitions. [2020-07-21 14:54:43,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:54:43,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 446 [2020-07-21 14:54:43,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:43,758 INFO L225 Difference]: With dead ends: 34554 [2020-07-21 14:54:43,758 INFO L226 Difference]: Without dead ends: 22685 [2020-07-21 14:54:43,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 444 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 14:54:43,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22685 states. [2020-07-21 14:54:44,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22685 to 22216. [2020-07-21 14:54:44,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22216 states. [2020-07-21 14:54:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22216 states to 22216 states and 37213 transitions. [2020-07-21 14:54:44,457 INFO L78 Accepts]: Start accepts. Automaton has 22216 states and 37213 transitions. Word has length 446 [2020-07-21 14:54:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:44,458 INFO L479 AbstractCegarLoop]: Abstraction has 22216 states and 37213 transitions. [2020-07-21 14:54:44,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:54:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 22216 states and 37213 transitions. [2020-07-21 14:54:44,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-21 14:54:44,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:44,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:54:44,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:44,695 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:44,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:44,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1745153922, now seen corresponding path program 1 times [2020-07-21 14:54:44,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:44,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183483321] [2020-07-21 14:54:44,697 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 14:54:45,193 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:45,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:45,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1757 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:54:45,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:45,248 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:54:45,709 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 14:54:45,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:45,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183483321] [2020-07-21 14:54:45,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:45,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:54:45,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911499304] [2020-07-21 14:54:45,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:54:45,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:45,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:54:45,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:54:45,712 INFO L87 Difference]: Start difference. First operand 22216 states and 37213 transitions. Second operand 5 states. [2020-07-21 14:54:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:48,254 INFO L93 Difference]: Finished difference Result 83847 states and 140116 transitions. [2020-07-21 14:54:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:54:48,254 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2020-07-21 14:54:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:48,343 INFO L225 Difference]: With dead ends: 83847 [2020-07-21 14:54:48,343 INFO L226 Difference]: Without dead ends: 62392 [2020-07-21 14:54:48,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 445 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 14:54:48,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62392 states. [2020-07-21 14:54:50,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62392 to 62380. [2020-07-21 14:54:50,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62380 states. [2020-07-21 14:54:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62380 states to 62380 states and 103976 transitions. [2020-07-21 14:54:52,318 INFO L78 Accepts]: Start accepts. Automaton has 62380 states and 103976 transitions. Word has length 449 [2020-07-21 14:54:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:52,319 INFO L479 AbstractCegarLoop]: Abstraction has 62380 states and 103976 transitions. [2020-07-21 14:54:52,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:54:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 62380 states and 103976 transitions. [2020-07-21 14:54:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-07-21 14:54:52,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:52,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:54:52,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:52,573 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:52,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:52,574 INFO L82 PathProgramCache]: Analyzing trace with hash 375840226, now seen corresponding path program 1 times [2020-07-21 14:54:52,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:52,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726176836] [2020-07-21 14:54:52,575 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 14:54:53,054 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:53,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:53,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 1769 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:54:53,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:53,175 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 14:54:53,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:53,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726176836] [2020-07-21 14:54:53,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:53,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:54:53,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458386415] [2020-07-21 14:54:53,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:54:53,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:53,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:54:53,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:54:53,178 INFO L87 Difference]: Start difference. First operand 62380 states and 103976 transitions. Second operand 4 states. [2020-07-21 14:54:54,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:54,597 INFO L93 Difference]: Finished difference Result 109159 states and 182176 transitions. [2020-07-21 14:54:54,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:54:54,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 459 [2020-07-21 14:54:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:54,674 INFO L225 Difference]: With dead ends: 109159 [2020-07-21 14:54:54,674 INFO L226 Difference]: Without dead ends: 62375 [2020-07-21 14:54:54,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 456 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 14:54:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62375 states. [2020-07-21 14:54:56,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62375 to 57019. [2020-07-21 14:54:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57019 states. [2020-07-21 14:54:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57019 states to 57019 states and 95152 transitions. [2020-07-21 14:54:56,735 INFO L78 Accepts]: Start accepts. Automaton has 57019 states and 95152 transitions. Word has length 459 [2020-07-21 14:54:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:56,736 INFO L479 AbstractCegarLoop]: Abstraction has 57019 states and 95152 transitions. [2020-07-21 14:54:56,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:54:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand 57019 states and 95152 transitions. [2020-07-21 14:54:56,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-21 14:54:56,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:56,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:54:56,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:56,963 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:56,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:56,964 INFO L82 PathProgramCache]: Analyzing trace with hash -29472166, now seen corresponding path program 1 times [2020-07-21 14:54:56,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:56,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301032988] [2020-07-21 14:54:56,966 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 14:54:57,444 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:57,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:57,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1769 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:54:57,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:57,556 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 14:54:57,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:57,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301032988] [2020-07-21 14:54:57,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:57,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:54:57,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741313542] [2020-07-21 14:54:57,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:54:57,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:57,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:54:57,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:54:57,558 INFO L87 Difference]: Start difference. First operand 57019 states and 95152 transitions. Second operand 4 states. [2020-07-21 14:55:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:55:00,089 INFO L93 Difference]: Finished difference Result 105304 states and 175842 transitions. [2020-07-21 14:55:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:55:00,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 464 [2020-07-21 14:55:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:55:00,150 INFO L225 Difference]: With dead ends: 105304 [2020-07-21 14:55:00,151 INFO L226 Difference]: Without dead ends: 57014 [2020-07-21 14:55:00,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 461 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 14:55:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57014 states. [2020-07-21 14:55:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57014 to 51658. [2020-07-21 14:55:01,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51658 states. [2020-07-21 14:55:01,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51658 states to 51658 states and 86328 transitions. [2020-07-21 14:55:01,524 INFO L78 Accepts]: Start accepts. Automaton has 51658 states and 86328 transitions. Word has length 464 [2020-07-21 14:55:01,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:55:01,525 INFO L479 AbstractCegarLoop]: Abstraction has 51658 states and 86328 transitions. [2020-07-21 14:55:01,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:55:01,525 INFO L276 IsEmpty]: Start isEmpty. Operand 51658 states and 86328 transitions. [2020-07-21 14:55:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-21 14:55:01,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:55:01,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:55:01,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:55:01,739 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:55:01,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:55:01,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1535114912, now seen corresponding path program 1 times [2020-07-21 14:55:01,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:55:01,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196154076] [2020-07-21 14:55:01,741 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 14:55:02,408 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:55:02,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:55:02,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 3126 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:55:02,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:55:02,570 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 14:55:02,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:55:02,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196154076] [2020-07-21 14:55:02,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:55:02,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:55:02,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668482026] [2020-07-21 14:55:02,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:55:02,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:55:02,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:55:02,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:55:02,573 INFO L87 Difference]: Start difference. First operand 51658 states and 86328 transitions. Second operand 3 states. [2020-07-21 14:55:04,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:55:04,447 INFO L93 Difference]: Finished difference Result 110639 states and 184818 transitions. [2020-07-21 14:55:04,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:55:04,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 469 [2020-07-21 14:55:04,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:55:04,530 INFO L225 Difference]: With dead ends: 110639 [2020-07-21 14:55:04,530 INFO L226 Difference]: Without dead ends: 59946 [2020-07-21 14:55:04,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 467 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 14:55:04,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59946 states. [2020-07-21 14:55:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59946 to 59942. [2020-07-21 14:55:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59942 states. [2020-07-21 14:55:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59942 states to 59942 states and 100072 transitions. [2020-07-21 14:55:06,549 INFO L78 Accepts]: Start accepts. Automaton has 59942 states and 100072 transitions. Word has length 469 [2020-07-21 14:55:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:55:06,550 INFO L479 AbstractCegarLoop]: Abstraction has 59942 states and 100072 transitions. [2020-07-21 14:55:06,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:55:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 59942 states and 100072 transitions. [2020-07-21 14:55:06,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 14:55:06,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:55:06,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:55:06,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:55:06,771 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:55:06,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:55:06,772 INFO L82 PathProgramCache]: Analyzing trace with hash -205147444, now seen corresponding path program 1 times [2020-07-21 14:55:06,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:55:06,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843123264] [2020-07-21 14:55:06,773 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 14:55:07,240 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:55:07,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:55:07,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 1777 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:55:07,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:55:07,370 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 14:55:07,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:55:07,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843123264] [2020-07-21 14:55:07,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:55:07,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:55:07,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671473621] [2020-07-21 14:55:07,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:55:07,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:55:07,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:55:07,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:55:07,372 INFO L87 Difference]: Start difference. First operand 59942 states and 100072 transitions. Second operand 3 states. [2020-07-21 14:55:10,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:55:10,560 INFO L93 Difference]: Finished difference Result 135104 states and 225721 transitions. [2020-07-21 14:55:10,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:55:10,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 474 [2020-07-21 14:55:10,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:55:10,667 INFO L225 Difference]: With dead ends: 135104 [2020-07-21 14:55:10,667 INFO L226 Difference]: Without dead ends: 84385 [2020-07-21 14:55:10,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 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 14:55:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84385 states. [2020-07-21 14:55:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84385 to 84381. [2020-07-21 14:55:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84381 states. [2020-07-21 14:55:12,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84381 states to 84381 states and 140864 transitions. [2020-07-21 14:55:12,907 INFO L78 Accepts]: Start accepts. Automaton has 84381 states and 140864 transitions. Word has length 474 [2020-07-21 14:55:12,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:55:12,908 INFO L479 AbstractCegarLoop]: Abstraction has 84381 states and 140864 transitions. [2020-07-21 14:55:12,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:55:12,908 INFO L276 IsEmpty]: Start isEmpty. Operand 84381 states and 140864 transitions. [2020-07-21 14:55:12,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 14:55:12,926 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:55:12,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:55:13,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:55:13,138 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:55:13,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:55:13,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1930462411, now seen corresponding path program 1 times [2020-07-21 14:55:13,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:55:13,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365194377] [2020-07-21 14:55:13,140 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 14:55:13,591 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:55:13,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:55:13,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 1782 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:55:13,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:55:13,764 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 14:55:13,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:55:13,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365194377] [2020-07-21 14:55:13,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:55:13,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:55:13,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923079766] [2020-07-21 14:55:13,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:55:13,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:55:13,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:55:13,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:55:13,772 INFO L87 Difference]: Start difference. First operand 84381 states and 140864 transitions. Second operand 3 states. [2020-07-21 14:55:17,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:55:17,614 INFO L93 Difference]: Finished difference Result 229521 states and 383328 transitions. [2020-07-21 14:55:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:55:17,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-21 14:55:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:55:17,864 INFO L225 Difference]: With dead ends: 229521 [2020-07-21 14:55:17,864 INFO L226 Difference]: Without dead ends: 155946 [2020-07-21 14:55:17,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 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 14:55:18,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155946 states. [2020-07-21 14:55:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155946 to 154457. [2020-07-21 14:55:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154457 states. [2020-07-21 14:55:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154457 states to 154457 states and 258048 transitions. [2020-07-21 14:55:24,807 INFO L78 Accepts]: Start accepts. Automaton has 154457 states and 258048 transitions. Word has length 478 [2020-07-21 14:55:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:55:24,808 INFO L479 AbstractCegarLoop]: Abstraction has 154457 states and 258048 transitions. [2020-07-21 14:55:24,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:55:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 154457 states and 258048 transitions. [2020-07-21 14:55:24,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 14:55:24,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:55:24,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:55:25,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:55:25,042 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:55:25,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:55:25,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2019935435, now seen corresponding path program 1 times [2020-07-21 14:55:25,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:55:25,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125223995] [2020-07-21 14:55:25,044 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 14:55:25,516 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:55:25,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:55:25,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:55:25,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:55:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:55:25,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:55:25,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125223995] [2020-07-21 14:55:25,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:55:25,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:55:25,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683119512] [2020-07-21 14:55:25,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:55:25,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:55:25,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:55:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:55:25,720 INFO L87 Difference]: Start difference. First operand 154457 states and 258048 transitions. Second operand 4 states. [2020-07-21 14:55:35,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:55:35,886 INFO L93 Difference]: Finished difference Result 458697 states and 766556 transitions. [2020-07-21 14:55:35,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:55:35,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-07-21 14:55:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:55:36,323 INFO L225 Difference]: With dead ends: 458697 [2020-07-21 14:55:36,323 INFO L226 Difference]: Without dead ends: 304315 [2020-07-21 14:55:36,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 475 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 14:55:36,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304315 states. [2020-07-21 14:55:50,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304315 to 304311. [2020-07-21 14:55:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304311 states. [2020-07-21 14:55:51,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304311 states to 304311 states and 507557 transitions. [2020-07-21 14:55:51,129 INFO L78 Accepts]: Start accepts. Automaton has 304311 states and 507557 transitions. Word has length 478 [2020-07-21 14:55:51,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:55:51,129 INFO L479 AbstractCegarLoop]: Abstraction has 304311 states and 507557 transitions. [2020-07-21 14:55:51,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:55:51,129 INFO L276 IsEmpty]: Start isEmpty. Operand 304311 states and 507557 transitions. [2020-07-21 14:55:51,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 14:55:51,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:55:51,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:55:51,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:55:51,360 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:55:51,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:55:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash -330492793, now seen corresponding path program 1 times [2020-07-21 14:55:51,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:55:51,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713686846] [2020-07-21 14:55:51,362 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 14:55:51,833 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:55:51,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:55:51,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:55:51,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:55:52,045 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 14:55:52,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:55:52,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713686846] [2020-07-21 14:55:52,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:55:52,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:55:52,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792778471] [2020-07-21 14:55:52,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:55:52,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:55:52,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:55:52,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:55:52,048 INFO L87 Difference]: Start difference. First operand 304311 states and 507557 transitions. Second operand 4 states. [2020-07-21 14:56:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:56:16,407 INFO L93 Difference]: Finished difference Result 909223 states and 1516072 transitions. [2020-07-21 14:56:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:56:16,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-21 14:56:16,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:56:17,361 INFO L225 Difference]: With dead ends: 909223 [2020-07-21 14:56:17,361 INFO L226 Difference]: Without dead ends: 604927 [2020-07-21 14:56:17,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 476 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 14:56:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604927 states. [2020-07-21 14:56:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604927 to 604923. [2020-07-21 14:56:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604923 states. [2020-07-21 14:56:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604923 states to 604923 states and 1006458 transitions. [2020-07-21 14:56:52,873 INFO L78 Accepts]: Start accepts. Automaton has 604923 states and 1006458 transitions. Word has length 479 [2020-07-21 14:56:52,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:56:52,874 INFO L479 AbstractCegarLoop]: Abstraction has 604923 states and 1006458 transitions. [2020-07-21 14:56:52,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:56:52,874 INFO L276 IsEmpty]: Start isEmpty. Operand 604923 states and 1006458 transitions. [2020-07-21 14:56:52,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 14:56:52,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:56:52,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:56:53,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:56:53,167 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:56:53,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:56:53,168 INFO L82 PathProgramCache]: Analyzing trace with hash -2121565828, now seen corresponding path program 1 times [2020-07-21 14:56:53,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:56:53,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809885192] [2020-07-21 14:56:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:56:53,627 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:56:53,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:56:53,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:56:53,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:56:53,749 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 14:56:53,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:56:53,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809885192] [2020-07-21 14:56:53,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:56:53,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:56:53,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882737087] [2020-07-21 14:56:53,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:56:53,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:56:53,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:56:53,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:56:53,751 INFO L87 Difference]: Start difference. First operand 604923 states and 1006458 transitions. Second operand 3 states. [2020-07-21 14:57:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:57:41,909 INFO L93 Difference]: Finished difference Result 1506081 states and 2507544 transitions. [2020-07-21 14:57:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:57:41,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-21 14:57:41,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:57:43,439 INFO L225 Difference]: With dead ends: 1506081 [2020-07-21 14:57:43,439 INFO L226 Difference]: Without dead ends: 903277 [2020-07-21 14:57:43,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:57:44,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903277 states. [2020-07-21 14:58:38,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903277 to 704433. [2020-07-21 14:58:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704433 states. [2020-07-21 14:58:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704433 states to 704433 states and 1170624 transitions. [2020-07-21 14:58:40,122 INFO L78 Accepts]: Start accepts. Automaton has 704433 states and 1170624 transitions. Word has length 480 [2020-07-21 14:58:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:58:40,122 INFO L479 AbstractCegarLoop]: Abstraction has 704433 states and 1170624 transitions. [2020-07-21 14:58:40,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:58:40,122 INFO L276 IsEmpty]: Start isEmpty. Operand 704433 states and 1170624 transitions. [2020-07-21 14:58:40,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 14:58:40,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:58:40,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:58:40,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:58:40,385 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:58:40,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:58:40,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1839881436, now seen corresponding path program 1 times [2020-07-21 14:58:40,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:58:40,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363494013] [2020-07-21 14:58:40,387 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:58:40,847 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:58:40,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:58:40,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:58:40,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:58:42,037 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 14:58:42,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:58:42,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363494013] [2020-07-21 14:58:42,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:58:42,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:58:42,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444145622] [2020-07-21 14:58:42,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:58:42,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:58:42,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:58:42,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:58:42,040 INFO L87 Difference]: Start difference. First operand 704433 states and 1170624 transitions. Second operand 4 states. [2020-07-21 14:59:55,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:59:55,976 INFO L93 Difference]: Finished difference Result 2092809 states and 3478685 transitions. [2020-07-21 14:59:55,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:59:55,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-07-21 14:59:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:59:58,208 INFO L225 Difference]: With dead ends: 2092809 [2020-07-21 14:59:58,208 INFO L226 Difference]: Without dead ends: 1388565 [2020-07-21 14:59:58,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:59:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388565 states.