/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:47:04,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:47:04,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:47:04,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:47:04,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:47:04,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:47:04,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:47:04,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:47:04,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:47:04,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:47:04,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:47:04,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:47:04,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:47:04,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:47:04,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:47:04,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:47:04,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:47:04,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:47:04,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:47:04,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:47:04,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:47:04,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:47:04,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:47:04,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:47:04,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:47:04,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:47:04,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:47:04,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:47:04,507 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 14:47:04,522 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:47:04,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:47:04,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:47:04,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:47:04,525 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:47:04,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:47:04,525 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:47:04,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:47:04,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:47:04,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:47:04,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:47:04,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:47:04,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:47:04,526 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:47:04,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:47:04,527 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:47:04,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:47:04,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:47:04,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:47:04,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:47:04,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:47:04,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:47:04,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:47:04,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:47:04,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:47:04,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:47:04,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:04,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:47:04,529 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:47:04,530 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 14:47:04,827 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:47:04,840 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:47:04,844 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:47:04,845 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:47:04,846 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:47:04,846 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 14:47:04,913 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c96172ef/edb18f5f13804ebb8e06c3f632eec6d8/FLAG4ac92a8bf [2020-07-21 14:47:05,523 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:47:05,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 14:47:05,544 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c96172ef/edb18f5f13804ebb8e06c3f632eec6d8/FLAG4ac92a8bf [2020-07-21 14:47:05,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c96172ef/edb18f5f13804ebb8e06c3f632eec6d8 [2020-07-21 14:47:05,712 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:47:05,715 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:47:05,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:47:05,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:47:05,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:47:05,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:47:05" (1/1) ... [2020-07-21 14:47:05,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59958d66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:47:05, skipping insertion in model container [2020-07-21 14:47:05,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:47:05" (1/1) ... [2020-07-21 14:47:05,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:47:05,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:47:06,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:47:06,870 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:47:07,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:47:07,463 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:47:07,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:47:07 WrapperNode [2020-07-21 14:47:07,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:47:07,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:47:07,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:47:07,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:47:07,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:47:07" (1/1) ... [2020-07-21 14:47:07,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:47:07" (1/1) ... [2020-07-21 14:47:07,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:47:07" (1/1) ... [2020-07-21 14:47:07,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:47:07" (1/1) ... [2020-07-21 14:47:07,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:47:07" (1/1) ... [2020-07-21 14:47:07,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:47:07" (1/1) ... [2020-07-21 14:47:07,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:47:07" (1/1) ... [2020-07-21 14:47:07,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:47:07,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:47:07,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:47:07,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:47:07,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:47:07" (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 14:47:07,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:47:07,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:47:07,743 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:47:07,744 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:47:07,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:47:07,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 14:47:07,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 14:47:07,745 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 14:47:07,746 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:47:07,746 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:47:07,747 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 14:47:07,748 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 14:47:07,748 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 14:47:07,748 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 14:47:07,748 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 14:47:07,750 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 14:47:07,750 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 14:47:07,750 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 14:47:07,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:47:07,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:47:07,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:47:10,597 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:47:10,597 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 14:47:10,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:47:10 BoogieIcfgContainer [2020-07-21 14:47:10,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:47:10,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:47:10,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:47:10,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:47:10,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:47:05" (1/3) ... [2020-07-21 14:47:10,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2725a3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:47:10, skipping insertion in model container [2020-07-21 14:47:10,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:47:07" (2/3) ... [2020-07-21 14:47:10,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2725a3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:47:10, skipping insertion in model container [2020-07-21 14:47:10,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:47:10" (3/3) ... [2020-07-21 14:47:10,617 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 14:47:10,629 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:47:10,637 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:47:10,652 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:47:10,678 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:47:10,678 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:47:10,678 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:47:10,679 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:47:10,679 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:47:10,679 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:47:10,679 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:47:10,679 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:47:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-21 14:47:10,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 14:47:10,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:10,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:10,741 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:10,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-21 14:47:10,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:10,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270946457] [2020-07-21 14:47:10,759 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 14:47:11,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:11,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:11,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:47:11,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:11,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:11,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270946457] [2020-07-21 14:47:11,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:11,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:47:11,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333818641] [2020-07-21 14:47:11,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:47:11,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:11,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:47:11,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:47:11,511 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-21 14:47:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:11,941 INFO L93 Difference]: Finished difference Result 2328 states and 4137 transitions. [2020-07-21 14:47:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:47:11,943 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-21 14:47:11,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:11,970 INFO L225 Difference]: With dead ends: 2328 [2020-07-21 14:47:11,970 INFO L226 Difference]: Without dead ends: 1542 [2020-07-21 14:47:11,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:47:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2020-07-21 14:47:12,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1540. [2020-07-21 14:47:12,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1540 states. [2020-07-21 14:47:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 2395 transitions. [2020-07-21 14:47:12,118 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 2395 transitions. Word has length 324 [2020-07-21 14:47:12,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:12,119 INFO L479 AbstractCegarLoop]: Abstraction has 1540 states and 2395 transitions. [2020-07-21 14:47:12,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:47:12,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 2395 transitions. [2020-07-21 14:47:12,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 14:47:12,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:12,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:12,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:12,342 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:12,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:12,342 INFO L82 PathProgramCache]: Analyzing trace with hash 559759921, now seen corresponding path program 1 times [2020-07-21 14:47:12,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:12,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423202668] [2020-07-21 14:47:12,343 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 14:47:12,619 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:12,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:12,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 1148 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:12,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:12,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:12,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423202668] [2020-07-21 14:47:12,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:12,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:12,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568007164] [2020-07-21 14:47:12,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:12,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:12,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:12,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:12,827 INFO L87 Difference]: Start difference. First operand 1540 states and 2395 transitions. Second operand 3 states. [2020-07-21 14:47:13,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:13,015 INFO L93 Difference]: Finished difference Result 4422 states and 6847 transitions. [2020-07-21 14:47:13,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:47:13,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 14:47:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:13,032 INFO L225 Difference]: With dead ends: 4422 [2020-07-21 14:47:13,032 INFO L226 Difference]: Without dead ends: 2984 [2020-07-21 14:47:13,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:13,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2020-07-21 14:47:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2982. [2020-07-21 14:47:13,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2982 states. [2020-07-21 14:47:13,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 4607 transitions. [2020-07-21 14:47:13,160 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 4607 transitions. Word has length 326 [2020-07-21 14:47:13,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:13,161 INFO L479 AbstractCegarLoop]: Abstraction has 2982 states and 4607 transitions. [2020-07-21 14:47:13,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:47:13,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 4607 transitions. [2020-07-21 14:47:13,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 14:47:13,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:13,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:13,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:13,387 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:13,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:13,388 INFO L82 PathProgramCache]: Analyzing trace with hash 59250742, now seen corresponding path program 1 times [2020-07-21 14:47:13,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:13,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970396954] [2020-07-21 14:47:13,390 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 14:47:13,708 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:13,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:13,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:13,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:13,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:13,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970396954] [2020-07-21 14:47:13,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:13,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:13,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785662772] [2020-07-21 14:47:13,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:13,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:13,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:13,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:13,793 INFO L87 Difference]: Start difference. First operand 2982 states and 4607 transitions. Second operand 3 states. [2020-07-21 14:47:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:14,025 INFO L93 Difference]: Finished difference Result 8914 states and 13772 transitions. [2020-07-21 14:47:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:47:14,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 14:47:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:14,064 INFO L225 Difference]: With dead ends: 8914 [2020-07-21 14:47:14,065 INFO L226 Difference]: Without dead ends: 5947 [2020-07-21 14:47:14,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:14,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5947 states. [2020-07-21 14:47:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5947 to 2993. [2020-07-21 14:47:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2993 states. [2020-07-21 14:47:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4623 transitions. [2020-07-21 14:47:14,431 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4623 transitions. Word has length 326 [2020-07-21 14:47:14,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:14,431 INFO L479 AbstractCegarLoop]: Abstraction has 2993 states and 4623 transitions. [2020-07-21 14:47:14,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:47:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4623 transitions. [2020-07-21 14:47:14,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 14:47:14,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:14,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:14,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:14,663 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:14,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:14,663 INFO L82 PathProgramCache]: Analyzing trace with hash -882201744, now seen corresponding path program 1 times [2020-07-21 14:47:14,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:14,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576528940] [2020-07-21 14:47:14,665 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 14:47:14,950 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:14,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:14,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:14,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:15,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:15,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576528940] [2020-07-21 14:47:15,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:15,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:15,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644980800] [2020-07-21 14:47:15,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:15,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:15,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:15,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:15,072 INFO L87 Difference]: Start difference. First operand 2993 states and 4623 transitions. Second operand 3 states. [2020-07-21 14:47:15,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:15,344 INFO L93 Difference]: Finished difference Result 8871 states and 13690 transitions. [2020-07-21 14:47:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:47:15,345 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 14:47:15,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:15,377 INFO L225 Difference]: With dead ends: 8871 [2020-07-21 14:47:15,377 INFO L226 Difference]: Without dead ends: 5908 [2020-07-21 14:47:15,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:15,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2020-07-21 14:47:15,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 3003. [2020-07-21 14:47:15,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3003 states. [2020-07-21 14:47:15,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 4637 transitions. [2020-07-21 14:47:15,662 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 4637 transitions. Word has length 327 [2020-07-21 14:47:15,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:15,663 INFO L479 AbstractCegarLoop]: Abstraction has 3003 states and 4637 transitions. [2020-07-21 14:47:15,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:47:15,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 4637 transitions. [2020-07-21 14:47:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 14:47:15,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:15,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:15,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:15,886 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:15,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:15,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2128959444, now seen corresponding path program 1 times [2020-07-21 14:47:15,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:15,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503477378] [2020-07-21 14:47:15,887 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 14:47:16,145 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:16,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:16,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:16,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:16,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:16,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503477378] [2020-07-21 14:47:16,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:16,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:16,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612333881] [2020-07-21 14:47:16,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:16,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:16,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:16,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:16,256 INFO L87 Difference]: Start difference. First operand 3003 states and 4637 transitions. Second operand 3 states. [2020-07-21 14:47:16,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:16,596 INFO L93 Difference]: Finished difference Result 8613 states and 13241 transitions. [2020-07-21 14:47:16,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:47:16,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 14:47:16,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:16,626 INFO L225 Difference]: With dead ends: 8613 [2020-07-21 14:47:16,627 INFO L226 Difference]: Without dead ends: 5805 [2020-07-21 14:47:16,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:16,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5805 states. [2020-07-21 14:47:16,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5805 to 5803. [2020-07-21 14:47:16,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5803 states. [2020-07-21 14:47:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 8898 transitions. [2020-07-21 14:47:16,896 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 8898 transitions. Word has length 328 [2020-07-21 14:47:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:16,897 INFO L479 AbstractCegarLoop]: Abstraction has 5803 states and 8898 transitions. [2020-07-21 14:47:16,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:47:16,897 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 8898 transitions. [2020-07-21 14:47:16,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 14:47:16,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:16,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:17,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:17,126 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:17,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1426305655, now seen corresponding path program 1 times [2020-07-21 14:47:17,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:17,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73223008] [2020-07-21 14:47:17,127 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 14:47:17,382 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:17,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:17,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:47:17,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:17,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:17,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73223008] [2020-07-21 14:47:17,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:17,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:47:17,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784396948] [2020-07-21 14:47:17,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:47:17,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:17,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:47:17,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:47:17,483 INFO L87 Difference]: Start difference. First operand 5803 states and 8898 transitions. Second operand 4 states. [2020-07-21 14:47:17,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:17,924 INFO L93 Difference]: Finished difference Result 16042 states and 24430 transitions. [2020-07-21 14:47:17,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:47:17,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-21 14:47:17,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:17,976 INFO L225 Difference]: With dead ends: 16042 [2020-07-21 14:47:17,976 INFO L226 Difference]: Without dead ends: 10685 [2020-07-21 14:47:17,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:47:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10685 states. [2020-07-21 14:47:18,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10685 to 6017. [2020-07-21 14:47:18,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6017 states. [2020-07-21 14:47:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6017 states to 6017 states and 9262 transitions. [2020-07-21 14:47:18,322 INFO L78 Accepts]: Start accepts. Automaton has 6017 states and 9262 transitions. Word has length 328 [2020-07-21 14:47:18,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:18,322 INFO L479 AbstractCegarLoop]: Abstraction has 6017 states and 9262 transitions. [2020-07-21 14:47:18,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:47:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 6017 states and 9262 transitions. [2020-07-21 14:47:18,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 14:47:18,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:18,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:18,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:18,558 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:18,559 INFO L82 PathProgramCache]: Analyzing trace with hash 730242313, now seen corresponding path program 1 times [2020-07-21 14:47:18,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:18,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936875825] [2020-07-21 14:47:18,559 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 14:47:18,800 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:18,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:18,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:18,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:18,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:18,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936875825] [2020-07-21 14:47:18,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:18,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:18,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918641204] [2020-07-21 14:47:18,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:18,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:18,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:18,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:18,942 INFO L87 Difference]: Start difference. First operand 6017 states and 9262 transitions. Second operand 3 states. [2020-07-21 14:47:19,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:19,255 INFO L93 Difference]: Finished difference Result 12717 states and 19608 transitions. [2020-07-21 14:47:19,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:47:19,255 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 14:47:19,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:19,279 INFO L225 Difference]: With dead ends: 12717 [2020-07-21 14:47:19,279 INFO L226 Difference]: Without dead ends: 8339 [2020-07-21 14:47:19,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:19,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8339 states. [2020-07-21 14:47:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8339 to 7001. [2020-07-21 14:47:19,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7001 states. [2020-07-21 14:47:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7001 states to 7001 states and 10870 transitions. [2020-07-21 14:47:19,577 INFO L78 Accepts]: Start accepts. Automaton has 7001 states and 10870 transitions. Word has length 330 [2020-07-21 14:47:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:19,578 INFO L479 AbstractCegarLoop]: Abstraction has 7001 states and 10870 transitions. [2020-07-21 14:47:19,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:47:19,578 INFO L276 IsEmpty]: Start isEmpty. Operand 7001 states and 10870 transitions. [2020-07-21 14:47:19,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 14:47:19,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:19,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:19,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:19,810 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:19,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:19,810 INFO L82 PathProgramCache]: Analyzing trace with hash 858352887, now seen corresponding path program 1 times [2020-07-21 14:47:19,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:19,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201825230] [2020-07-21 14:47:19,812 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 14:47:20,064 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:20,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:20,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:20,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:20,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:20,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201825230] [2020-07-21 14:47:20,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:20,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:20,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301017767] [2020-07-21 14:47:20,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:20,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:20,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:20,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:20,253 INFO L87 Difference]: Start difference. First operand 7001 states and 10870 transitions. Second operand 3 states. [2020-07-21 14:47:20,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:20,643 INFO L93 Difference]: Finished difference Result 19711 states and 30314 transitions. [2020-07-21 14:47:20,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:47:20,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 14:47:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:20,677 INFO L225 Difference]: With dead ends: 19711 [2020-07-21 14:47:20,677 INFO L226 Difference]: Without dead ends: 13352 [2020-07-21 14:47:20,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:20,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13352 states. [2020-07-21 14:47:21,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13352 to 7098. [2020-07-21 14:47:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7098 states. [2020-07-21 14:47:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7098 states to 7098 states and 11000 transitions. [2020-07-21 14:47:21,077 INFO L78 Accepts]: Start accepts. Automaton has 7098 states and 11000 transitions. Word has length 330 [2020-07-21 14:47:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:21,078 INFO L479 AbstractCegarLoop]: Abstraction has 7098 states and 11000 transitions. [2020-07-21 14:47:21,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:47:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 7098 states and 11000 transitions. [2020-07-21 14:47:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 14:47:21,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:21,092 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 14:47:21,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:21,306 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:21,307 INFO L82 PathProgramCache]: Analyzing trace with hash 903222164, now seen corresponding path program 1 times [2020-07-21 14:47:21,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:21,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758298620] [2020-07-21 14:47:21,308 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 14:47:21,557 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:21,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:21,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:21,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:21,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:21,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758298620] [2020-07-21 14:47:21,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:21,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:21,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563574687] [2020-07-21 14:47:21,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:21,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:21,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:21,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:21,692 INFO L87 Difference]: Start difference. First operand 7098 states and 11000 transitions. Second operand 3 states. [2020-07-21 14:47:22,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:22,020 INFO L93 Difference]: Finished difference Result 19834 states and 30465 transitions. [2020-07-21 14:47:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:47:22,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-21 14:47:22,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:22,061 INFO L225 Difference]: With dead ends: 19834 [2020-07-21 14:47:22,061 INFO L226 Difference]: Without dead ends: 13495 [2020-07-21 14:47:22,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:22,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13495 states. [2020-07-21 14:47:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13495 to 7215. [2020-07-21 14:47:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7215 states. [2020-07-21 14:47:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7215 states to 7215 states and 11155 transitions. [2020-07-21 14:47:22,424 INFO L78 Accepts]: Start accepts. Automaton has 7215 states and 11155 transitions. Word has length 331 [2020-07-21 14:47:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:22,424 INFO L479 AbstractCegarLoop]: Abstraction has 7215 states and 11155 transitions. [2020-07-21 14:47:22,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:47:22,424 INFO L276 IsEmpty]: Start isEmpty. Operand 7215 states and 11155 transitions. [2020-07-21 14:47:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 14:47:22,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:22,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:22,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:22,650 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:22,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:22,651 INFO L82 PathProgramCache]: Analyzing trace with hash 960357788, now seen corresponding path program 1 times [2020-07-21 14:47:22,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:22,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483579590] [2020-07-21 14:47:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:22,910 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:22,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:22,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:47:22,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:23,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:23,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483579590] [2020-07-21 14:47:23,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:23,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 14:47:23,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216697676] [2020-07-21 14:47:23,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:47:23,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:23,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:47:23,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:47:23,140 INFO L87 Difference]: Start difference. First operand 7215 states and 11155 transitions. Second operand 9 states. [2020-07-21 14:47:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:29,414 INFO L93 Difference]: Finished difference Result 47594 states and 75108 transitions. [2020-07-21 14:47:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 14:47:29,415 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 332 [2020-07-21 14:47:29,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:29,489 INFO L225 Difference]: With dead ends: 47594 [2020-07-21 14:47:29,489 INFO L226 Difference]: Without dead ends: 45888 [2020-07-21 14:47:29,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 14:47:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45888 states. [2020-07-21 14:47:30,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45888 to 17943. [2020-07-21 14:47:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17943 states. [2020-07-21 14:47:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17943 states to 17943 states and 28113 transitions. [2020-07-21 14:47:30,578 INFO L78 Accepts]: Start accepts. Automaton has 17943 states and 28113 transitions. Word has length 332 [2020-07-21 14:47:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:30,579 INFO L479 AbstractCegarLoop]: Abstraction has 17943 states and 28113 transitions. [2020-07-21 14:47:30,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 14:47:30,579 INFO L276 IsEmpty]: Start isEmpty. Operand 17943 states and 28113 transitions. [2020-07-21 14:47:30,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 14:47:30,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:30,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:30,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:30,797 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:30,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:30,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1837398990, now seen corresponding path program 1 times [2020-07-21 14:47:30,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:30,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562814900] [2020-07-21 14:47:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:31,055 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:31,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:31,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:31,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:31,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:31,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562814900] [2020-07-21 14:47:31,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:31,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:31,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348409270] [2020-07-21 14:47:31,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:31,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:31,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:31,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:31,114 INFO L87 Difference]: Start difference. First operand 17943 states and 28113 transitions. Second operand 3 states. [2020-07-21 14:47:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:32,240 INFO L93 Difference]: Finished difference Result 41459 states and 65529 transitions. [2020-07-21 14:47:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:47:32,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 14:47:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:32,283 INFO L225 Difference]: With dead ends: 41459 [2020-07-21 14:47:32,284 INFO L226 Difference]: Without dead ends: 25517 [2020-07-21 14:47:32,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:32,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25517 states. [2020-07-21 14:47:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25517 to 23197. [2020-07-21 14:47:34,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23197 states. [2020-07-21 14:47:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23197 states to 23197 states and 36735 transitions. [2020-07-21 14:47:34,079 INFO L78 Accepts]: Start accepts. Automaton has 23197 states and 36735 transitions. Word has length 332 [2020-07-21 14:47:34,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:34,079 INFO L479 AbstractCegarLoop]: Abstraction has 23197 states and 36735 transitions. [2020-07-21 14:47:34,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:47:34,079 INFO L276 IsEmpty]: Start isEmpty. Operand 23197 states and 36735 transitions. [2020-07-21 14:47:34,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 14:47:34,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:34,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:34,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:34,295 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:34,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:34,295 INFO L82 PathProgramCache]: Analyzing trace with hash 757713930, now seen corresponding path program 1 times [2020-07-21 14:47:34,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:34,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678353616] [2020-07-21 14:47:34,297 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:34,547 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:34,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:34,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:47:34,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:34,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:34,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678353616] [2020-07-21 14:47:34,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:34,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:47:34,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149071701] [2020-07-21 14:47:34,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:47:34,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:34,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:47:34,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:47:34,651 INFO L87 Difference]: Start difference. First operand 23197 states and 36735 transitions. Second operand 4 states. [2020-07-21 14:47:35,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:35,965 INFO L93 Difference]: Finished difference Result 43182 states and 68276 transitions. [2020-07-21 14:47:35,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:47:35,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 14:47:35,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:36,004 INFO L225 Difference]: With dead ends: 43182 [2020-07-21 14:47:36,005 INFO L226 Difference]: Without dead ends: 20950 [2020-07-21 14:47:36,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:47:36,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20950 states. [2020-07-21 14:47:37,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20950 to 20876. [2020-07-21 14:47:37,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20876 states. [2020-07-21 14:47:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20876 states to 20876 states and 33035 transitions. [2020-07-21 14:47:37,172 INFO L78 Accepts]: Start accepts. Automaton has 20876 states and 33035 transitions. Word has length 332 [2020-07-21 14:47:37,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:37,172 INFO L479 AbstractCegarLoop]: Abstraction has 20876 states and 33035 transitions. [2020-07-21 14:47:37,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:47:37,173 INFO L276 IsEmpty]: Start isEmpty. Operand 20876 states and 33035 transitions. [2020-07-21 14:47:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 14:47:37,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:37,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:37,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:37,386 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:37,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:37,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1945945451, now seen corresponding path program 1 times [2020-07-21 14:47:37,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:37,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611924769] [2020-07-21 14:47:37,388 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:37,651 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:37,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:37,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:47:37,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:37,749 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 14:47:37,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:37,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611924769] [2020-07-21 14:47:37,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:37,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:47:37,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581809123] [2020-07-21 14:47:37,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:47:37,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:37,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:47:37,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:47:37,751 INFO L87 Difference]: Start difference. First operand 20876 states and 33035 transitions. Second operand 4 states. [2020-07-21 14:47:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:39,485 INFO L93 Difference]: Finished difference Result 61639 states and 97473 transitions. [2020-07-21 14:47:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:47:39,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-21 14:47:39,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:39,555 INFO L225 Difference]: With dead ends: 61639 [2020-07-21 14:47:39,555 INFO L226 Difference]: Without dead ends: 40976 [2020-07-21 14:47:39,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:47:39,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40976 states. [2020-07-21 14:47:41,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40976 to 40974. [2020-07-21 14:47:41,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40974 states. [2020-07-21 14:47:41,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40974 states to 40974 states and 64533 transitions. [2020-07-21 14:47:41,575 INFO L78 Accepts]: Start accepts. Automaton has 40974 states and 64533 transitions. Word has length 333 [2020-07-21 14:47:41,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:41,576 INFO L479 AbstractCegarLoop]: Abstraction has 40974 states and 64533 transitions. [2020-07-21 14:47:41,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:47:41,576 INFO L276 IsEmpty]: Start isEmpty. Operand 40974 states and 64533 transitions. [2020-07-21 14:47:41,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 14:47:41,592 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:41,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:41,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:41,793 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:41,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:41,794 INFO L82 PathProgramCache]: Analyzing trace with hash 254132386, now seen corresponding path program 1 times [2020-07-21 14:47:41,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:41,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834943639] [2020-07-21 14:47:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:42,911 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:42,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:42,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:42,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:43,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:43,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834943639] [2020-07-21 14:47:43,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:43,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:43,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458947850] [2020-07-21 14:47:43,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:43,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:43,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:43,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:43,017 INFO L87 Difference]: Start difference. First operand 40974 states and 64533 transitions. Second operand 3 states. [2020-07-21 14:47:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:46,225 INFO L93 Difference]: Finished difference Result 120016 states and 188732 transitions. [2020-07-21 14:47:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:47:46,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 14:47:46,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:46,334 INFO L225 Difference]: With dead ends: 120016 [2020-07-21 14:47:46,334 INFO L226 Difference]: Without dead ends: 79820 [2020-07-21 14:47:46,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:46,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79820 states. [2020-07-21 14:47:51,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79820 to 79818. [2020-07-21 14:47:51,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79818 states. [2020-07-21 14:47:51,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79818 states to 79818 states and 124923 transitions. [2020-07-21 14:47:51,641 INFO L78 Accepts]: Start accepts. Automaton has 79818 states and 124923 transitions. Word has length 335 [2020-07-21 14:47:51,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:51,641 INFO L479 AbstractCegarLoop]: Abstraction has 79818 states and 124923 transitions. [2020-07-21 14:47:51,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:47:51,642 INFO L276 IsEmpty]: Start isEmpty. Operand 79818 states and 124923 transitions. [2020-07-21 14:47:51,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 14:47:51,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:51,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:51,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:51,882 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:51,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:51,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1360763581, now seen corresponding path program 1 times [2020-07-21 14:47:51,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:51,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845532944] [2020-07-21 14:47:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:52,126 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:52,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:52,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:52,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:52,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:52,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845532944] [2020-07-21 14:47:52,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:52,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:52,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583425572] [2020-07-21 14:47:52,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:52,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:52,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:52,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:52,188 INFO L87 Difference]: Start difference. First operand 79818 states and 124923 transitions. Second operand 3 states. [2020-07-21 14:47:57,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:57,080 INFO L93 Difference]: Finished difference Result 158952 states and 248141 transitions. [2020-07-21 14:47:57,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:47:57,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 14:47:57,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:57,216 INFO L225 Difference]: With dead ends: 158952 [2020-07-21 14:47:57,217 INFO L226 Difference]: Without dead ends: 114800 [2020-07-21 14:47:57,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114800 states. [2020-07-21 14:48:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114800 to 79822. [2020-07-21 14:48:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79822 states. [2020-07-21 14:48:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79822 states to 79822 states and 124925 transitions. [2020-07-21 14:48:03,194 INFO L78 Accepts]: Start accepts. Automaton has 79822 states and 124925 transitions. Word has length 335 [2020-07-21 14:48:03,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:03,194 INFO L479 AbstractCegarLoop]: Abstraction has 79822 states and 124925 transitions. [2020-07-21 14:48:03,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:48:03,195 INFO L276 IsEmpty]: Start isEmpty. Operand 79822 states and 124925 transitions. [2020-07-21 14:48:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 14:48:03,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:03,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:03,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:03,442 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:03,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:03,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1718375350, now seen corresponding path program 1 times [2020-07-21 14:48:03,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:03,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002031617] [2020-07-21 14:48:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:03,690 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:03,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:03,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:48:03,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:03,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:03,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002031617] [2020-07-21 14:48:03,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:03,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 14:48:03,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720309891] [2020-07-21 14:48:03,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:48:03,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:03,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:48:03,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:48:03,804 INFO L87 Difference]: Start difference. First operand 79822 states and 124925 transitions. Second operand 9 states. [2020-07-21 14:48:27,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:27,370 INFO L93 Difference]: Finished difference Result 390306 states and 615667 transitions. [2020-07-21 14:48:27,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 14:48:27,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 335 [2020-07-21 14:48:27,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:28,086 INFO L225 Difference]: With dead ends: 390306 [2020-07-21 14:48:28,086 INFO L226 Difference]: Without dead ends: 356652 [2020-07-21 14:48:28,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=1054, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 14:48:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356652 states. [2020-07-21 14:48:44,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356652 to 190434. [2020-07-21 14:48:44,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190434 states. [2020-07-21 14:48:45,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190434 states to 190434 states and 299555 transitions. [2020-07-21 14:48:45,231 INFO L78 Accepts]: Start accepts. Automaton has 190434 states and 299555 transitions. Word has length 335 [2020-07-21 14:48:45,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:45,232 INFO L479 AbstractCegarLoop]: Abstraction has 190434 states and 299555 transitions. [2020-07-21 14:48:45,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 14:48:45,232 INFO L276 IsEmpty]: Start isEmpty. Operand 190434 states and 299555 transitions. [2020-07-21 14:48:45,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 14:48:45,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:45,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:45,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:45,492 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:45,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1489812399, now seen corresponding path program 1 times [2020-07-21 14:48:45,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:45,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567318610] [2020-07-21 14:48:45,494 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 14:48:45,741 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:45,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:45,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:48:45,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:45,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:45,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567318610] [2020-07-21 14:48:45,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:45,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:48:45,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664909085] [2020-07-21 14:48:45,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:48:45,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:45,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:48:45,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:45,816 INFO L87 Difference]: Start difference. First operand 190434 states and 299555 transitions. Second operand 3 states. [2020-07-21 14:49:09,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:49:09,468 INFO L93 Difference]: Finished difference Result 569472 states and 895515 transitions. [2020-07-21 14:49:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:49:09,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 14:49:09,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:49:09,991 INFO L225 Difference]: With dead ends: 569472 [2020-07-21 14:49:09,991 INFO L226 Difference]: Without dead ends: 379820 [2020-07-21 14:49:10,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:10,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379820 states. [2020-07-21 14:49:28,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379820 to 190434. [2020-07-21 14:49:28,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190434 states. [2020-07-21 14:49:28,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190434 states to 190434 states and 299551 transitions. [2020-07-21 14:49:28,442 INFO L78 Accepts]: Start accepts. Automaton has 190434 states and 299551 transitions. Word has length 335 [2020-07-21 14:49:28,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:49:28,442 INFO L479 AbstractCegarLoop]: Abstraction has 190434 states and 299551 transitions. [2020-07-21 14:49:28,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:49:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 190434 states and 299551 transitions. [2020-07-21 14:49:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 14:49:28,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:49:28,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:49:28,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:28,698 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:49:28,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:49:28,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1934530709, now seen corresponding path program 1 times [2020-07-21 14:49:28,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:49:28,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500491188] [2020-07-21 14:49:28,700 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 14:49:28,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:49:28,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:49:28,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:49:28,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:49:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:49:29,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:49:29,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500491188] [2020-07-21 14:49:29,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:49:29,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:49:29,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116764299] [2020-07-21 14:49:29,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:49:29,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:49:29,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:49:29,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:29,033 INFO L87 Difference]: Start difference. First operand 190434 states and 299551 transitions. Second operand 3 states. [2020-07-21 14:49:49,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:49:49,537 INFO L93 Difference]: Finished difference Result 472552 states and 749655 transitions. [2020-07-21 14:49:49,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:49:49,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 14:49:49,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:49:49,997 INFO L225 Difference]: With dead ends: 472552 [2020-07-21 14:49:49,997 INFO L226 Difference]: Without dead ends: 289344 [2020-07-21 14:49:50,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:50,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289344 states. [2020-07-21 14:50:14,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289344 to 269258. [2020-07-21 14:50:14,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269258 states. [2020-07-21 14:50:14,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269258 states to 269258 states and 424735 transitions. [2020-07-21 14:50:14,824 INFO L78 Accepts]: Start accepts. Automaton has 269258 states and 424735 transitions. Word has length 336 [2020-07-21 14:50:14,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:50:14,824 INFO L479 AbstractCegarLoop]: Abstraction has 269258 states and 424735 transitions. [2020-07-21 14:50:14,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:50:14,824 INFO L276 IsEmpty]: Start isEmpty. Operand 269258 states and 424735 transitions. [2020-07-21 14:50:14,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 14:50:14,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:50:14,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:50:15,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:50:15,083 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:50:15,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:50:15,084 INFO L82 PathProgramCache]: Analyzing trace with hash 689658759, now seen corresponding path program 1 times [2020-07-21 14:50:15,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:50:15,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217304317] [2020-07-21 14:50:15,085 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 14:50:15,333 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:50:15,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:50:15,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:50:15,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:50:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:50:15,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:50:15,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217304317] [2020-07-21 14:50:15,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:50:15,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:50:15,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931867696] [2020-07-21 14:50:15,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:50:15,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:50:15,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:50:15,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:50:15,450 INFO L87 Difference]: Start difference. First operand 269258 states and 424735 transitions. Second operand 3 states. [2020-07-21 14:50:57,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:50:57,245 INFO L93 Difference]: Finished difference Result 792768 states and 1249417 transitions. [2020-07-21 14:50:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:50:57,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-21 14:50:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:50:58,102 INFO L225 Difference]: With dead ends: 792768 [2020-07-21 14:50:58,102 INFO L226 Difference]: Without dead ends: 525862 [2020-07-21 14:50:58,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:50:58,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525862 states. [2020-07-21 14:51:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525862 to 525860. [2020-07-21 14:51:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525860 states. [2020-07-21 14:51:41,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525860 states to 525860 states and 824872 transitions. [2020-07-21 14:51:41,615 INFO L78 Accepts]: Start accepts. Automaton has 525860 states and 824872 transitions. Word has length 337 [2020-07-21 14:51:41,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:51:41,615 INFO L479 AbstractCegarLoop]: Abstraction has 525860 states and 824872 transitions. [2020-07-21 14:51:41,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:51:41,615 INFO L276 IsEmpty]: Start isEmpty. Operand 525860 states and 824872 transitions. [2020-07-21 14:51:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 14:51:41,720 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:51:41,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:51:41,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:51:41,921 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:51:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:51:41,921 INFO L82 PathProgramCache]: Analyzing trace with hash -715123382, now seen corresponding path program 1 times [2020-07-21 14:51:41,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:51:41,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224236188] [2020-07-21 14:51:41,922 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 14:51:42,184 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:51:42,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:51:42,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:51:42,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:51:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:51:42,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:51:42,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224236188] [2020-07-21 14:51:42,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:51:42,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:51:42,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624886216] [2020-07-21 14:51:42,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:51:42,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:51:42,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:51:42,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:51:42,270 INFO L87 Difference]: Start difference. First operand 525860 states and 824872 transitions. Second operand 4 states. [2020-07-21 14:53:00,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:53:00,355 INFO L93 Difference]: Finished difference Result 1447563 states and 2267338 transitions. [2020-07-21 14:53:00,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:53:00,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-21 14:53:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:53:01,838 INFO L225 Difference]: With dead ends: 1447563 [2020-07-21 14:53:01,838 INFO L226 Difference]: Without dead ends: 926425 [2020-07-21 14:53:02,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 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 14:53:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926425 states. [2020-07-21 14:53:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926425 to 512253. [2020-07-21 14:53:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512253 states. [2020-07-21 14:54:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512253 states to 512253 states and 802919 transitions. [2020-07-21 14:54:10,214 INFO L78 Accepts]: Start accepts. Automaton has 512253 states and 802919 transitions. Word has length 337 [2020-07-21 14:54:10,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:10,215 INFO L479 AbstractCegarLoop]: Abstraction has 512253 states and 802919 transitions. [2020-07-21 14:54:10,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:54:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 512253 states and 802919 transitions. [2020-07-21 14:54:10,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 14:54:10,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:10,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:54:10,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:10,513 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:10,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:10,514 INFO L82 PathProgramCache]: Analyzing trace with hash 46616022, now seen corresponding path program 1 times [2020-07-21 14:54:10,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:10,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418334392] [2020-07-21 14:54:10,516 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 14:54:10,765 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:10,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:10,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:54:10,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:10,818 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 14:54:10,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:10,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418334392] [2020-07-21 14:54:10,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:10,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:54:10,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343155136] [2020-07-21 14:54:10,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:54:10,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:10,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:54:10,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:54:10,820 INFO L87 Difference]: Start difference. First operand 512253 states and 802919 transitions. Second operand 3 states. [2020-07-21 14:55:35,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:55:35,183 INFO L93 Difference]: Finished difference Result 1454894 states and 2279174 transitions. [2020-07-21 14:55:35,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:55:35,183 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-21 14:55:35,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:55:36,716 INFO L225 Difference]: With dead ends: 1454894 [2020-07-21 14:55:36,716 INFO L226 Difference]: Without dead ends: 965386 [2020-07-21 14:55:37,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 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 14:55:37,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965386 states. [2020-07-21 14:56:38,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965386 to 512365. [2020-07-21 14:56:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512365 states. [2020-07-21 14:56:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512365 states to 512365 states and 803061 transitions. [2020-07-21 14:56:39,956 INFO L78 Accepts]: Start accepts. Automaton has 512365 states and 803061 transitions. Word has length 339 [2020-07-21 14:56:39,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:56:39,957 INFO L479 AbstractCegarLoop]: Abstraction has 512365 states and 803061 transitions. [2020-07-21 14:56:39,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:56:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 512365 states and 803061 transitions. [2020-07-21 14:56:40,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-21 14:56:40,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:56:40,058 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 14:56:40,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:56:40,264 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:56:40,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:56:40,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1224644435, now seen corresponding path program 1 times [2020-07-21 14:56:40,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:56:40,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382830403] [2020-07-21 14:56:40,266 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 14:56:40,516 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:56:40,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:56:40,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:56:40,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:56:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:56:40,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:56:40,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382830403] [2020-07-21 14:56:40,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:56:40,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:56:40,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108786771] [2020-07-21 14:56:40,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:56:40,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:56:40,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:56:40,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:56:40,578 INFO L87 Difference]: Start difference. First operand 512365 states and 803061 transitions. Second operand 3 states. [2020-07-21 14:58:08,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:58:08,945 INFO L93 Difference]: Finished difference Result 1523513 states and 2387029 transitions. [2020-07-21 14:58:08,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:58:08,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2020-07-21 14:58:08,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:58:10,768 INFO L225 Difference]: With dead ends: 1523513 [2020-07-21 14:58:10,768 INFO L226 Difference]: Without dead ends: 1017743 [2020-07-21 14:58:11,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 338 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 14:58:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017743 states.