/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:28:17,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:28:17,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:28:17,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:28:17,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:28:17,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:28:17,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:28:17,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:28:17,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:28:17,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:28:17,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:28:17,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:28:17,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:28:17,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:28:17,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:28:17,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:28:17,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:28:17,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:28:17,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:28:17,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:28:17,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:28:17,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:28:17,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:28:17,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:28:17,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:28:17,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 02:28:17,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 02:28:17,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 02:28:17,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 02:28:17,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 02:28:17,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 02:28:17,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 02:28:17,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 02:28:17,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:28:17,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:28:17,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:28:17,554 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 02:28:17,570 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:28:17,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:28:17,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:28:17,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:28:17,572 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:28:17,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:28:17,572 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:28:17,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:28:17,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:28:17,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:28:17,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:28:17,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:28:17,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:28:17,574 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:28:17,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:28:17,574 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:28:17,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:28:17,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:28:17,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:28:17,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:28:17,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:28:17,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:28:17,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:28:17,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:28:17,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:28:17,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:28:17,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:17,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:28:17,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:28:17,577 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 -> BIGGEST_EQUIVALENCE_CLASS 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 -> 4 [2020-07-21 02:28:17,861 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:28:17,874 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:28:17,877 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:28:17,879 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:28:17,879 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:28:17,880 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 02:28:17,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f8095a1f/41d776d21fd04f67bbeea40137ab4f58/FLAG00e17e21d [2020-07-21 02:28:18,623 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:28:18,624 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 02:28:18,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f8095a1f/41d776d21fd04f67bbeea40137ab4f58/FLAG00e17e21d [2020-07-21 02:28:18,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f8095a1f/41d776d21fd04f67bbeea40137ab4f58 [2020-07-21 02:28:18,764 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:28:18,767 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:28:18,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:28:18,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:28:18,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:28:18,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:28:18" (1/1) ... [2020-07-21 02:28:18,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bfe3aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:28:18, skipping insertion in model container [2020-07-21 02:28:18,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:28:18" (1/1) ... [2020-07-21 02:28:18,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:28:18,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:28:20,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:28:20,575 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:28:22,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:28:22,253 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:28:22,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:28:22 WrapperNode [2020-07-21 02:28:22,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:28:22,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:28:22,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:28:22,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:28:22,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:28:22" (1/1) ... [2020-07-21 02:28:22,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:28:22" (1/1) ... [2020-07-21 02:28:22,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:28:22" (1/1) ... [2020-07-21 02:28:22,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:28:22" (1/1) ... [2020-07-21 02:28:22,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:28:22" (1/1) ... [2020-07-21 02:28:22,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:28:22" (1/1) ... [2020-07-21 02:28:22,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:28:22" (1/1) ... [2020-07-21 02:28:22,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:28:22,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:28:22,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:28:22,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:28:22,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:28:22" (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 02:28:22,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:28:22,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:28:22,585 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:28:22,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:28:22,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:28:22,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 02:28:22,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 02:28:22,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 02:28:22,587 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 02:28:22,587 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:28:22,587 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:28:22,587 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 02:28:22,588 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 02:28:22,588 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 02:28:22,588 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 02:28:22,588 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 02:28:22,588 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 02:28:22,589 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 02:28:22,589 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 02:28:22,589 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 02:28:22,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:28:22,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:28:22,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:28:26,583 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:28:26,584 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 02:28:26,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:28:26 BoogieIcfgContainer [2020-07-21 02:28:26,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:28:26,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:28:26,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:28:26,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:28:26,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:28:18" (1/3) ... [2020-07-21 02:28:26,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67808717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:28:26, skipping insertion in model container [2020-07-21 02:28:26,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:28:22" (2/3) ... [2020-07-21 02:28:26,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67808717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:28:26, skipping insertion in model container [2020-07-21 02:28:26,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:28:26" (3/3) ... [2020-07-21 02:28:26,604 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 02:28:26,615 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:28:26,630 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 02:28:26,649 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 02:28:26,695 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:28:26,696 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:28:26,696 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:28:26,696 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:28:26,696 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:28:26,696 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:28:26,697 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:28:26,697 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:28:26,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states. [2020-07-21 02:28:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 02:28:26,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:26,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:26,808 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:26,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:26,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1738290825, now seen corresponding path program 1 times [2020-07-21 02:28:26,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:26,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38928363] [2020-07-21 02:28:26,825 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:28:27,521 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:27,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:27,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:28:27,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:28,020 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 02:28:28,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:28,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38928363] [2020-07-21 02:28:28,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:28,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:28:28,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037857482] [2020-07-21 02:28:28,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:28:28,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:28,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:28:28,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:28:28,047 INFO L87 Difference]: Start difference. First operand 1506 states. Second operand 4 states. [2020-07-21 02:28:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:28,571 INFO L93 Difference]: Finished difference Result 4461 states and 8055 transitions. [2020-07-21 02:28:28,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:28:28,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-21 02:28:28,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:28,611 INFO L225 Difference]: With dead ends: 4461 [2020-07-21 02:28:28,611 INFO L226 Difference]: Without dead ends: 2962 [2020-07-21 02:28:28,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:28:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2020-07-21 02:28:28,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2917. [2020-07-21 02:28:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2917 states. [2020-07-21 02:28:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 4790 transitions. [2020-07-21 02:28:28,819 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 4790 transitions. Word has length 493 [2020-07-21 02:28:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:28,821 INFO L479 AbstractCegarLoop]: Abstraction has 2917 states and 4790 transitions. [2020-07-21 02:28:28,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:28:28,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 4790 transitions. [2020-07-21 02:28:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 02:28:28,837 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:28,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:29,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:29,053 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:29,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1745979400, now seen corresponding path program 1 times [2020-07-21 02:28:29,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:29,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892190145] [2020-07-21 02:28:29,055 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:28:29,557 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:29,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:29,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 2122 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:29,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:29,839 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 02:28:29,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:29,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892190145] [2020-07-21 02:28:29,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:29,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:29,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896181465] [2020-07-21 02:28:29,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:29,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:29,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:29,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:29,844 INFO L87 Difference]: Start difference. First operand 2917 states and 4790 transitions. Second operand 3 states. [2020-07-21 02:28:30,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:30,212 INFO L93 Difference]: Finished difference Result 8441 states and 13816 transitions. [2020-07-21 02:28:30,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:30,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 02:28:30,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:30,249 INFO L225 Difference]: With dead ends: 8441 [2020-07-21 02:28:30,249 INFO L226 Difference]: Without dead ends: 5753 [2020-07-21 02:28:30,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 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 02:28:30,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5753 states. [2020-07-21 02:28:30,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5753 to 5710. [2020-07-21 02:28:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5710 states. [2020-07-21 02:28:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 9351 transitions. [2020-07-21 02:28:30,513 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 9351 transitions. Word has length 495 [2020-07-21 02:28:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:30,514 INFO L479 AbstractCegarLoop]: Abstraction has 5710 states and 9351 transitions. [2020-07-21 02:28:30,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:30,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 9351 transitions. [2020-07-21 02:28:30,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 02:28:30,537 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:30,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:30,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:30,752 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:30,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2031538529, now seen corresponding path program 1 times [2020-07-21 02:28:30,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:30,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084740799] [2020-07-21 02:28:30,754 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:28:31,146 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:31,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:31,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:31,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:31,390 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 02:28:31,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:31,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084740799] [2020-07-21 02:28:31,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:31,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:31,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109977423] [2020-07-21 02:28:31,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:31,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:31,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:31,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:31,396 INFO L87 Difference]: Start difference. First operand 5710 states and 9351 transitions. Second operand 3 states. [2020-07-21 02:28:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:31,722 INFO L93 Difference]: Finished difference Result 16874 states and 27590 transitions. [2020-07-21 02:28:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:31,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 02:28:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:31,780 INFO L225 Difference]: With dead ends: 16874 [2020-07-21 02:28:31,780 INFO L226 Difference]: Without dead ends: 11195 [2020-07-21 02:28:31,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 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 02:28:31,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11195 states. [2020-07-21 02:28:32,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11195 to 5736. [2020-07-21 02:28:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5736 states. [2020-07-21 02:28:32,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5736 states to 5736 states and 9389 transitions. [2020-07-21 02:28:32,091 INFO L78 Accepts]: Start accepts. Automaton has 5736 states and 9389 transitions. Word has length 496 [2020-07-21 02:28:32,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:32,092 INFO L479 AbstractCegarLoop]: Abstraction has 5736 states and 9389 transitions. [2020-07-21 02:28:32,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:32,092 INFO L276 IsEmpty]: Start isEmpty. Operand 5736 states and 9389 transitions. [2020-07-21 02:28:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 02:28:32,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:32,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:32,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:32,341 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:32,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:32,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1933455501, now seen corresponding path program 1 times [2020-07-21 02:28:32,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:32,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389504470] [2020-07-21 02:28:32,343 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:28:32,782 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:32,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:32,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1740 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:28:32,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:32,943 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 02:28:32,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:32,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389504470] [2020-07-21 02:28:32,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:32,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:28:32,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922517777] [2020-07-21 02:28:32,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:28:32,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:32,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:28:32,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:28:32,947 INFO L87 Difference]: Start difference. First operand 5736 states and 9389 transitions. Second operand 4 states. [2020-07-21 02:28:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:33,428 INFO L93 Difference]: Finished difference Result 13543 states and 22348 transitions. [2020-07-21 02:28:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:28:33,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-07-21 02:28:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:33,461 INFO L225 Difference]: With dead ends: 13543 [2020-07-21 02:28:33,461 INFO L226 Difference]: Without dead ends: 6868 [2020-07-21 02:28:33,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 494 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 02:28:33,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6868 states. [2020-07-21 02:28:33,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6868 to 6825. [2020-07-21 02:28:33,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6825 states. [2020-07-21 02:28:33,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6825 states to 6825 states and 11231 transitions. [2020-07-21 02:28:33,848 INFO L78 Accepts]: Start accepts. Automaton has 6825 states and 11231 transitions. Word has length 497 [2020-07-21 02:28:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:33,848 INFO L479 AbstractCegarLoop]: Abstraction has 6825 states and 11231 transitions. [2020-07-21 02:28:33,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:28:33,851 INFO L276 IsEmpty]: Start isEmpty. Operand 6825 states and 11231 transitions. [2020-07-21 02:28:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 02:28:33,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:33,882 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:34,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:34,095 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:34,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:34,096 INFO L82 PathProgramCache]: Analyzing trace with hash 791346258, now seen corresponding path program 1 times [2020-07-21 02:28:34,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:34,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612473454] [2020-07-21 02:28:34,097 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:28:34,547 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:34,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:34,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 2128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:34,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:34,691 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 02:28:34,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:34,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612473454] [2020-07-21 02:28:34,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:34,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:34,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874680995] [2020-07-21 02:28:34,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:34,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:34,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:34,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:34,694 INFO L87 Difference]: Start difference. First operand 6825 states and 11231 transitions. Second operand 3 states. [2020-07-21 02:28:35,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:35,543 INFO L93 Difference]: Finished difference Result 12318 states and 19936 transitions. [2020-07-21 02:28:35,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:35,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-21 02:28:35,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:35,566 INFO L225 Difference]: With dead ends: 12318 [2020-07-21 02:28:35,570 INFO L226 Difference]: Without dead ends: 8731 [2020-07-21 02:28:35,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 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 02:28:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8731 states. [2020-07-21 02:28:35,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8731 to 7641. [2020-07-21 02:28:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7641 states. [2020-07-21 02:28:35,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7641 states to 7641 states and 12572 transitions. [2020-07-21 02:28:35,866 INFO L78 Accepts]: Start accepts. Automaton has 7641 states and 12572 transitions. Word has length 499 [2020-07-21 02:28:35,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:35,866 INFO L479 AbstractCegarLoop]: Abstraction has 7641 states and 12572 transitions. [2020-07-21 02:28:35,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:35,867 INFO L276 IsEmpty]: Start isEmpty. Operand 7641 states and 12572 transitions. [2020-07-21 02:28:35,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 02:28:35,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:35,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:36,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:36,098 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:36,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:36,098 INFO L82 PathProgramCache]: Analyzing trace with hash -160987480, now seen corresponding path program 1 times [2020-07-21 02:28:36,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:36,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890430396] [2020-07-21 02:28:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:28:36,542 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:36,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:36,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 2125 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:36,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:36,853 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 02:28:36,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:36,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890430396] [2020-07-21 02:28:36,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:36,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:36,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037616573] [2020-07-21 02:28:36,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:36,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:36,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:36,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:36,855 INFO L87 Difference]: Start difference. First operand 7641 states and 12572 transitions. Second operand 3 states. [2020-07-21 02:28:37,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:37,339 INFO L93 Difference]: Finished difference Result 22400 states and 36811 transitions. [2020-07-21 02:28:37,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:37,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-21 02:28:37,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:37,376 INFO L225 Difference]: With dead ends: 22400 [2020-07-21 02:28:37,376 INFO L226 Difference]: Without dead ends: 15135 [2020-07-21 02:28:37,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 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 02:28:37,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15135 states. [2020-07-21 02:28:37,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15135 to 15059. [2020-07-21 02:28:37,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15059 states. [2020-07-21 02:28:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15059 states to 15059 states and 24701 transitions. [2020-07-21 02:28:37,895 INFO L78 Accepts]: Start accepts. Automaton has 15059 states and 24701 transitions. Word has length 499 [2020-07-21 02:28:37,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:37,895 INFO L479 AbstractCegarLoop]: Abstraction has 15059 states and 24701 transitions. [2020-07-21 02:28:37,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 15059 states and 24701 transitions. [2020-07-21 02:28:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 02:28:37,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:37,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:38,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:38,152 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:38,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:38,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1312362157, now seen corresponding path program 1 times [2020-07-21 02:28:38,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:38,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112838170] [2020-07-21 02:28:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:28:38,638 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:38,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:38,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:38,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:38,828 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 02:28:38,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:38,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112838170] [2020-07-21 02:28:38,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:38,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:38,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653958864] [2020-07-21 02:28:38,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:38,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:38,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:38,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:38,832 INFO L87 Difference]: Start difference. First operand 15059 states and 24701 transitions. Second operand 3 states. [2020-07-21 02:28:39,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:39,376 INFO L93 Difference]: Finished difference Result 44896 states and 73628 transitions. [2020-07-21 02:28:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:39,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-21 02:28:39,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:39,450 INFO L225 Difference]: With dead ends: 44896 [2020-07-21 02:28:39,451 INFO L226 Difference]: Without dead ends: 29974 [2020-07-21 02:28:39,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 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 02:28:39,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29974 states. [2020-07-21 02:28:40,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29974 to 15152. [2020-07-21 02:28:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15152 states. [2020-07-21 02:28:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15152 states to 15152 states and 24842 transitions. [2020-07-21 02:28:40,304 INFO L78 Accepts]: Start accepts. Automaton has 15152 states and 24842 transitions. Word has length 499 [2020-07-21 02:28:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:40,304 INFO L479 AbstractCegarLoop]: Abstraction has 15152 states and 24842 transitions. [2020-07-21 02:28:40,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:40,304 INFO L276 IsEmpty]: Start isEmpty. Operand 15152 states and 24842 transitions. [2020-07-21 02:28:40,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 02:28:40,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:40,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:40,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:40,533 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:40,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:40,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1131026839, now seen corresponding path program 1 times [2020-07-21 02:28:40,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:40,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934811911] [2020-07-21 02:28:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:28:40,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:40,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:40,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:40,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:41,079 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 02:28:41,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:41,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934811911] [2020-07-21 02:28:41,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:41,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:41,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896848095] [2020-07-21 02:28:41,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:41,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:41,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:41,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:41,086 INFO L87 Difference]: Start difference. First operand 15152 states and 24842 transitions. Second operand 3 states. [2020-07-21 02:28:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:41,818 INFO L93 Difference]: Finished difference Result 44512 states and 72932 transitions. [2020-07-21 02:28:41,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:41,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-21 02:28:41,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:41,890 INFO L225 Difference]: With dead ends: 44512 [2020-07-21 02:28:41,890 INFO L226 Difference]: Without dead ends: 29846 [2020-07-21 02:28:41,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 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 02:28:41,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29846 states. [2020-07-21 02:28:42,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29846 to 15304. [2020-07-21 02:28:42,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15304 states. [2020-07-21 02:28:42,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15304 states to 15304 states and 25066 transitions. [2020-07-21 02:28:42,476 INFO L78 Accepts]: Start accepts. Automaton has 15304 states and 25066 transitions. Word has length 500 [2020-07-21 02:28:42,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:42,476 INFO L479 AbstractCegarLoop]: Abstraction has 15304 states and 25066 transitions. [2020-07-21 02:28:42,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 15304 states and 25066 transitions. [2020-07-21 02:28:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 02:28:42,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:42,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:42,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:42,710 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:42,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:42,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2123165756, now seen corresponding path program 1 times [2020-07-21 02:28:42,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:42,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449752796] [2020-07-21 02:28:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:28:43,120 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:43,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:43,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:43,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:44,251 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 02:28:44,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:44,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449752796] [2020-07-21 02:28:44,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:44,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:44,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778675142] [2020-07-21 02:28:44,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:44,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:44,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:44,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:44,259 INFO L87 Difference]: Start difference. First operand 15304 states and 25066 transitions. Second operand 3 states. [2020-07-21 02:28:45,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:45,020 INFO L93 Difference]: Finished difference Result 45523 states and 74540 transitions. [2020-07-21 02:28:45,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:45,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-21 02:28:45,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:45,080 INFO L225 Difference]: With dead ends: 45523 [2020-07-21 02:28:45,081 INFO L226 Difference]: Without dead ends: 30410 [2020-07-21 02:28:45,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 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 02:28:45,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30410 states. [2020-07-21 02:28:45,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30410 to 15436. [2020-07-21 02:28:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15436 states. [2020-07-21 02:28:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15436 states to 15436 states and 25237 transitions. [2020-07-21 02:28:45,800 INFO L78 Accepts]: Start accepts. Automaton has 15436 states and 25237 transitions. Word has length 500 [2020-07-21 02:28:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:45,800 INFO L479 AbstractCegarLoop]: Abstraction has 15436 states and 25237 transitions. [2020-07-21 02:28:45,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 15436 states and 25237 transitions. [2020-07-21 02:28:45,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 02:28:45,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:45,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:46,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:46,015 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:46,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:46,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1141222616, now seen corresponding path program 1 times [2020-07-21 02:28:46,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:46,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287361753] [2020-07-21 02:28:46,017 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:28:46,440 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:46,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:46,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:46,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:46,568 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 02:28:46,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:46,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287361753] [2020-07-21 02:28:46,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:46,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:46,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095169812] [2020-07-21 02:28:46,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:46,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:46,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:46,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:46,571 INFO L87 Difference]: Start difference. First operand 15436 states and 25237 transitions. Second operand 3 states. [2020-07-21 02:28:47,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:47,220 INFO L93 Difference]: Finished difference Result 28750 states and 46585 transitions. [2020-07-21 02:28:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:47,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 02:28:47,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:47,255 INFO L225 Difference]: With dead ends: 28750 [2020-07-21 02:28:47,256 INFO L226 Difference]: Without dead ends: 20438 [2020-07-21 02:28:47,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 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 02:28:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20438 states. [2020-07-21 02:28:48,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20438 to 18348. [2020-07-21 02:28:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18348 states. [2020-07-21 02:28:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18348 states to 18348 states and 30049 transitions. [2020-07-21 02:28:48,128 INFO L78 Accepts]: Start accepts. Automaton has 18348 states and 30049 transitions. Word has length 501 [2020-07-21 02:28:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:48,129 INFO L479 AbstractCegarLoop]: Abstraction has 18348 states and 30049 transitions. [2020-07-21 02:28:48,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 18348 states and 30049 transitions. [2020-07-21 02:28:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 02:28:48,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:48,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:48,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:48,348 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:48,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:48,349 INFO L82 PathProgramCache]: Analyzing trace with hash 56197873, now seen corresponding path program 1 times [2020-07-21 02:28:48,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:48,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858246446] [2020-07-21 02:28:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:28:48,768 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:48,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:48,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 2127 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:48,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:48,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:48,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858246446] [2020-07-21 02:28:48,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:48,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:48,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515683900] [2020-07-21 02:28:48,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:48,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:48,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:48,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:48,987 INFO L87 Difference]: Start difference. First operand 18348 states and 30049 transitions. Second operand 3 states. [2020-07-21 02:28:50,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:50,116 INFO L93 Difference]: Finished difference Result 52529 states and 85894 transitions. [2020-07-21 02:28:50,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:50,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 02:28:50,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:50,159 INFO L225 Difference]: With dead ends: 52529 [2020-07-21 02:28:50,159 INFO L226 Difference]: Without dead ends: 35725 [2020-07-21 02:28:50,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 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 02:28:50,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35725 states. [2020-07-21 02:28:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35725 to 35684. [2020-07-21 02:28:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35684 states. [2020-07-21 02:28:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35684 states to 35684 states and 58227 transitions. [2020-07-21 02:28:51,255 INFO L78 Accepts]: Start accepts. Automaton has 35684 states and 58227 transitions. Word has length 501 [2020-07-21 02:28:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:51,256 INFO L479 AbstractCegarLoop]: Abstraction has 35684 states and 58227 transitions. [2020-07-21 02:28:51,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 35684 states and 58227 transitions. [2020-07-21 02:28:51,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 02:28:51,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:51,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:51,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:51,501 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:51,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:51,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1807316952, now seen corresponding path program 1 times [2020-07-21 02:28:51,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:51,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022736980] [2020-07-21 02:28:51,503 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:28:52,135 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:52,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:52,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 2133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:28:52,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:52,365 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 02:28:52,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:52,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022736980] [2020-07-21 02:28:52,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:52,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:28:52,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061069701] [2020-07-21 02:28:52,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:28:52,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:52,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:28:52,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:28:52,368 INFO L87 Difference]: Start difference. First operand 35684 states and 58227 transitions. Second operand 4 states. [2020-07-21 02:28:55,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:55,481 INFO L93 Difference]: Finished difference Result 103181 states and 168292 transitions. [2020-07-21 02:28:55,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:28:55,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-21 02:28:55,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:55,572 INFO L225 Difference]: With dead ends: 103181 [2020-07-21 02:28:55,572 INFO L226 Difference]: Without dead ends: 69145 [2020-07-21 02:28:55,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 499 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 02:28:55,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69145 states. [2020-07-21 02:28:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69145 to 69011. [2020-07-21 02:28:58,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69011 states. [2020-07-21 02:28:58,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69011 states to 69011 states and 112116 transitions. [2020-07-21 02:28:58,101 INFO L78 Accepts]: Start accepts. Automaton has 69011 states and 112116 transitions. Word has length 502 [2020-07-21 02:28:58,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:58,101 INFO L479 AbstractCegarLoop]: Abstraction has 69011 states and 112116 transitions. [2020-07-21 02:28:58,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:28:58,101 INFO L276 IsEmpty]: Start isEmpty. Operand 69011 states and 112116 transitions. [2020-07-21 02:28:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 02:28:58,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:58,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:58,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:58,355 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:58,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:58,356 INFO L82 PathProgramCache]: Analyzing trace with hash -816137863, now seen corresponding path program 1 times [2020-07-21 02:28:58,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:58,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889536185] [2020-07-21 02:28:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:28:58,799 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:58,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:58,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 2129 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:58,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:58,994 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 02:28:58,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:58,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889536185] [2020-07-21 02:28:58,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:58,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:58,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286319394] [2020-07-21 02:28:58,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:58,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:58,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:58,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:58,997 INFO L87 Difference]: Start difference. First operand 69011 states and 112116 transitions. Second operand 3 states. [2020-07-21 02:29:05,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:29:05,082 INFO L93 Difference]: Finished difference Result 200467 states and 325408 transitions. [2020-07-21 02:29:05,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:29:05,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-21 02:29:05,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:29:05,252 INFO L225 Difference]: With dead ends: 200467 [2020-07-21 02:29:05,252 INFO L226 Difference]: Without dead ends: 134581 [2020-07-21 02:29:05,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 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 02:29:05,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134581 states. [2020-07-21 02:29:10,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134581 to 134399. [2020-07-21 02:29:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134399 states. [2020-07-21 02:29:10,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134399 states to 134399 states and 217564 transitions. [2020-07-21 02:29:10,397 INFO L78 Accepts]: Start accepts. Automaton has 134399 states and 217564 transitions. Word has length 504 [2020-07-21 02:29:10,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:29:10,397 INFO L479 AbstractCegarLoop]: Abstraction has 134399 states and 217564 transitions. [2020-07-21 02:29:10,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:29:10,397 INFO L276 IsEmpty]: Start isEmpty. Operand 134399 states and 217564 transitions. [2020-07-21 02:29:10,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 02:29:10,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:29:10,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:29:10,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:10,682 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:29:10,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:29:10,682 INFO L82 PathProgramCache]: Analyzing trace with hash 626054159, now seen corresponding path program 1 times [2020-07-21 02:29:10,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:29:10,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61488100] [2020-07-21 02:29:10,683 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:29:11,060 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:29:11,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:29:11,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 1748 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:29:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:29:11,198 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 02:29:11,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:29:11,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61488100] [2020-07-21 02:29:11,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:29:11,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:29:11,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633093033] [2020-07-21 02:29:11,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:29:11,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:29:11,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:29:11,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:29:11,200 INFO L87 Difference]: Start difference. First operand 134399 states and 217564 transitions. Second operand 3 states. [2020-07-21 02:29:21,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:29:21,519 INFO L93 Difference]: Finished difference Result 397953 states and 643810 transitions. [2020-07-21 02:29:21,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:29:21,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 505 [2020-07-21 02:29:21,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:29:21,844 INFO L225 Difference]: With dead ends: 397953 [2020-07-21 02:29:21,844 INFO L226 Difference]: Without dead ends: 265679 [2020-07-21 02:29:21,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 503 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 02:29:22,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265679 states. [2020-07-21 02:29:30,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265679 to 134925. [2020-07-21 02:29:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134925 states. [2020-07-21 02:29:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134925 states to 134925 states and 218320 transitions. [2020-07-21 02:29:31,139 INFO L78 Accepts]: Start accepts. Automaton has 134925 states and 218320 transitions. Word has length 505 [2020-07-21 02:29:31,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:29:31,139 INFO L479 AbstractCegarLoop]: Abstraction has 134925 states and 218320 transitions. [2020-07-21 02:29:31,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:29:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 134925 states and 218320 transitions. [2020-07-21 02:29:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-21 02:29:31,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:29:31,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:29:31,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:31,427 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:29:31,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:29:31,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1051577625, now seen corresponding path program 1 times [2020-07-21 02:29:31,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:29:31,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386274411] [2020-07-21 02:29:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:29:31,796 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:29:31,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:29:31,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 1747 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:29:31,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:29:31,919 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 02:29:31,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:29:31,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386274411] [2020-07-21 02:29:31,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:29:31,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:29:31,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631078383] [2020-07-21 02:29:31,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:29:31,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:29:31,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:29:31,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:29:31,921 INFO L87 Difference]: Start difference. First operand 134925 states and 218320 transitions. Second operand 3 states. [2020-07-21 02:29:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:29:43,901 INFO L93 Difference]: Finished difference Result 399493 states and 646200 transitions. [2020-07-21 02:29:43,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:29:43,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 506 [2020-07-21 02:29:43,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:29:44,243 INFO L225 Difference]: With dead ends: 399493 [2020-07-21 02:29:44,243 INFO L226 Difference]: Without dead ends: 267159 [2020-07-21 02:29:44,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 504 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 02:29:44,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267159 states. [2020-07-21 02:29:51,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267159 to 135905. [2020-07-21 02:29:51,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135905 states. [2020-07-21 02:29:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135905 states to 135905 states and 219760 transitions. [2020-07-21 02:29:51,395 INFO L78 Accepts]: Start accepts. Automaton has 135905 states and 219760 transitions. Word has length 506 [2020-07-21 02:29:51,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:29:51,396 INFO L479 AbstractCegarLoop]: Abstraction has 135905 states and 219760 transitions. [2020-07-21 02:29:51,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:29:51,396 INFO L276 IsEmpty]: Start isEmpty. Operand 135905 states and 219760 transitions. [2020-07-21 02:29:51,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 02:29:51,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:29:51,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:29:51,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:51,676 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:29:51,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:29:51,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1404135771, now seen corresponding path program 1 times [2020-07-21 02:29:51,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:29:51,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123563649] [2020-07-21 02:29:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:29:52,052 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:29:52,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:29:52,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:29:52,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:29:52,183 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 02:29:52,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:29:52,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123563649] [2020-07-21 02:29:52,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:29:52,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:29:52,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379497076] [2020-07-21 02:29:52,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:29:52,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:29:52,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:29:52,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:29:52,186 INFO L87 Difference]: Start difference. First operand 135905 states and 219760 transitions. Second operand 3 states. [2020-07-21 02:30:04,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:04,709 INFO L93 Difference]: Finished difference Result 401263 states and 648630 transitions. [2020-07-21 02:30:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:04,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-07-21 02:30:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:05,048 INFO L225 Difference]: With dead ends: 401263 [2020-07-21 02:30:05,048 INFO L226 Difference]: Without dead ends: 268719 [2020-07-21 02:30:05,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 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 02:30:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268719 states. [2020-07-21 02:30:15,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268719 to 137465. [2020-07-21 02:30:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137465 states. [2020-07-21 02:30:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137465 states to 137465 states and 221800 transitions. [2020-07-21 02:30:15,773 INFO L78 Accepts]: Start accepts. Automaton has 137465 states and 221800 transitions. Word has length 507 [2020-07-21 02:30:15,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:15,774 INFO L479 AbstractCegarLoop]: Abstraction has 137465 states and 221800 transitions. [2020-07-21 02:30:15,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:15,774 INFO L276 IsEmpty]: Start isEmpty. Operand 137465 states and 221800 transitions. [2020-07-21 02:30:15,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-21 02:30:15,900 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:15,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:30:16,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:16,112 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:16,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:16,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1466108367, now seen corresponding path program 1 times [2020-07-21 02:30:16,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:16,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233763644] [2020-07-21 02:30:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:30:16,491 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:30:16,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:16,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:30:16,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:16,613 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 02:30:16,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:16,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233763644] [2020-07-21 02:30:16,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:16,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:30:16,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410458020] [2020-07-21 02:30:16,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:30:16,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:16,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:30:16,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:30:16,616 INFO L87 Difference]: Start difference. First operand 137465 states and 221800 transitions. Second operand 4 states. [2020-07-21 02:30:24,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:24,747 INFO L93 Difference]: Finished difference Result 294023 states and 476276 transitions. [2020-07-21 02:30:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:30:24,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 508 [2020-07-21 02:30:24,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:24,930 INFO L225 Difference]: With dead ends: 294023 [2020-07-21 02:30:24,930 INFO L226 Difference]: Without dead ends: 162179 [2020-07-21 02:30:25,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 505 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 02:30:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162179 states. [2020-07-21 02:30:35,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162179 to 139677. [2020-07-21 02:30:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139677 states. [2020-07-21 02:30:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139677 states to 139677 states and 225194 transitions. [2020-07-21 02:30:35,979 INFO L78 Accepts]: Start accepts. Automaton has 139677 states and 225194 transitions. Word has length 508 [2020-07-21 02:30:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:35,979 INFO L479 AbstractCegarLoop]: Abstraction has 139677 states and 225194 transitions. [2020-07-21 02:30:35,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:30:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 139677 states and 225194 transitions. [2020-07-21 02:30:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-21 02:30:36,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:36,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:36,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:36,262 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:36,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:36,262 INFO L82 PathProgramCache]: Analyzing trace with hash -645565231, now seen corresponding path program 1 times [2020-07-21 02:30:36,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:36,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500206466] [2020-07-21 02:30:36,263 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:30:36,631 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:30:36,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:36,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:30:36,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:37,086 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 02:30:37,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:37,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500206466] [2020-07-21 02:30:37,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:37,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:30:37,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086140227] [2020-07-21 02:30:37,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:30:37,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:30:37,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:30:37,088 INFO L87 Difference]: Start difference. First operand 139677 states and 225194 transitions. Second operand 4 states. [2020-07-21 02:30:45,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:45,912 INFO L93 Difference]: Finished difference Result 321961 states and 521421 transitions. [2020-07-21 02:30:45,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:30:45,912 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 509 [2020-07-21 02:30:45,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:46,115 INFO L225 Difference]: With dead ends: 321961 [2020-07-21 02:30:46,115 INFO L226 Difference]: Without dead ends: 165585 [2020-07-21 02:30:46,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 506 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 02:30:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165585 states. [2020-07-21 02:30:59,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165585 to 165475. [2020-07-21 02:30:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165475 states. [2020-07-21 02:30:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165475 states to 165475 states and 266625 transitions. [2020-07-21 02:30:59,963 INFO L78 Accepts]: Start accepts. Automaton has 165475 states and 266625 transitions. Word has length 509 [2020-07-21 02:30:59,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:59,963 INFO L479 AbstractCegarLoop]: Abstraction has 165475 states and 266625 transitions. [2020-07-21 02:30:59,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:30:59,963 INFO L276 IsEmpty]: Start isEmpty. Operand 165475 states and 266625 transitions. [2020-07-21 02:31:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-07-21 02:31:00,067 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:31:00,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:31:00,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:00,268 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:31:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:31:00,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1759102675, now seen corresponding path program 1 times [2020-07-21 02:31:00,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:31:00,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514416825] [2020-07-21 02:31:00,270 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:31:00,670 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:31:00,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:31:00,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 2138 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:31:00,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:31:01,067 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 02:31:01,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:31:01,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514416825] [2020-07-21 02:31:01,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:31:01,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:31:01,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104847629] [2020-07-21 02:31:01,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:31:01,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:31:01,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:31:01,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:31:01,070 INFO L87 Difference]: Start difference. First operand 165475 states and 266625 transitions. Second operand 3 states. [2020-07-21 02:31:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:31:11,588 INFO L93 Difference]: Finished difference Result 305883 states and 491730 transitions. [2020-07-21 02:31:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:31:11,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 510 [2020-07-21 02:31:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:31:11,880 INFO L225 Difference]: With dead ends: 305883 [2020-07-21 02:31:11,880 INFO L226 Difference]: Without dead ends: 221205 [2020-07-21 02:31:11,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 508 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 02:31:12,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221205 states. [2020-07-21 02:31:27,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221205 to 206179. [2020-07-21 02:31:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206179 states. [2020-07-21 02:31:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206179 states to 206179 states and 333681 transitions. [2020-07-21 02:31:27,977 INFO L78 Accepts]: Start accepts. Automaton has 206179 states and 333681 transitions. Word has length 510 [2020-07-21 02:31:27,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:31:27,978 INFO L479 AbstractCegarLoop]: Abstraction has 206179 states and 333681 transitions. [2020-07-21 02:31:27,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:31:27,978 INFO L276 IsEmpty]: Start isEmpty. Operand 206179 states and 333681 transitions. [2020-07-21 02:31:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 02:31:28,094 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:31:28,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:31:28,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:28,307 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:31:28,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:31:28,308 INFO L82 PathProgramCache]: Analyzing trace with hash -342264576, now seen corresponding path program 1 times [2020-07-21 02:31:28,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:31:28,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050570229] [2020-07-21 02:31:28,309 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:31:28,679 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:31:28,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:31:28,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1740 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:31:28,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:31:29,088 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 02:31:29,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:31:29,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050570229] [2020-07-21 02:31:29,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:31:29,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:31:29,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826608843] [2020-07-21 02:31:29,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:31:29,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:31:29,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:31:29,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:31:29,090 INFO L87 Difference]: Start difference. First operand 206179 states and 333681 transitions. Second operand 4 states. [2020-07-21 02:31:44,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:31:44,515 INFO L93 Difference]: Finished difference Result 469173 states and 761144 transitions. [2020-07-21 02:31:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:31:44,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 511 [2020-07-21 02:31:44,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:31:44,844 INFO L225 Difference]: With dead ends: 469173 [2020-07-21 02:31:44,844 INFO L226 Difference]: Without dead ends: 245614 [2020-07-21 02:31:45,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 508 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 02:31:45,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245614 states. [2020-07-21 02:32:02,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245614 to 245573. [2020-07-21 02:32:02,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245573 states. [2020-07-21 02:32:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245573 states to 245573 states and 396845 transitions. [2020-07-21 02:32:03,354 INFO L78 Accepts]: Start accepts. Automaton has 245573 states and 396845 transitions. Word has length 511 [2020-07-21 02:32:03,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:32:03,354 INFO L479 AbstractCegarLoop]: Abstraction has 245573 states and 396845 transitions. [2020-07-21 02:32:03,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:32:03,355 INFO L276 IsEmpty]: Start isEmpty. Operand 245573 states and 396845 transitions. [2020-07-21 02:32:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2020-07-21 02:32:03,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:32:03,497 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:32:03,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:32:03,698 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:32:03,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:32:03,699 INFO L82 PathProgramCache]: Analyzing trace with hash 662762928, now seen corresponding path program 1 times [2020-07-21 02:32:03,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:32:03,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078206408] [2020-07-21 02:32:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:32:04,066 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:32:04,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:32:04,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:32:04,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:32:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:32:04,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:32:04,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078206408] [2020-07-21 02:32:04,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:32:04,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:32:04,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970138492] [2020-07-21 02:32:04,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:32:04,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:32:04,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:32:04,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:32:04,785 INFO L87 Difference]: Start difference. First operand 245573 states and 396845 transitions. Second operand 4 states. [2020-07-21 02:32:34,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:32:34,252 INFO L93 Difference]: Finished difference Result 695338 states and 1122497 transitions. [2020-07-21 02:32:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:32:34,252 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 512 [2020-07-21 02:32:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:32:34,836 INFO L225 Difference]: With dead ends: 695338 [2020-07-21 02:32:34,836 INFO L226 Difference]: Without dead ends: 453292 [2020-07-21 02:32:35,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 509 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 02:32:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453292 states. [2020-07-21 02:33:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453292 to 453259. [2020-07-21 02:33:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453259 states. [2020-07-21 02:33:08,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453259 states to 453259 states and 727890 transitions. [2020-07-21 02:33:08,795 INFO L78 Accepts]: Start accepts. Automaton has 453259 states and 727890 transitions. Word has length 512 [2020-07-21 02:33:08,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:33:08,795 INFO L479 AbstractCegarLoop]: Abstraction has 453259 states and 727890 transitions. [2020-07-21 02:33:08,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:33:08,796 INFO L276 IsEmpty]: Start isEmpty. Operand 453259 states and 727890 transitions. [2020-07-21 02:33:09,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2020-07-21 02:33:09,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:33:09,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:09,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:09,269 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:33:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:33:09,270 INFO L82 PathProgramCache]: Analyzing trace with hash -440131580, now seen corresponding path program 1 times [2020-07-21 02:33:09,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:33:09,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102373412] [2020-07-21 02:33:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 02:33:09,698 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:33:09,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:33:09,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 2142 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 02:33:09,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:33:10,687 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 02:33:10,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:33:10,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102373412] [2020-07-21 02:33:10,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:33:10,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:33:10,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498824636] [2020-07-21 02:33:10,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:33:10,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:33:10,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:33:10,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:33:10,689 INFO L87 Difference]: Start difference. First operand 453259 states and 727890 transitions. Second operand 3 states. [2020-07-21 02:34:05,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:34:05,427 INFO L93 Difference]: Finished difference Result 972436 states and 1549817 transitions. [2020-07-21 02:34:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:34:05,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 513 [2020-07-21 02:34:05,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:34:06,429 INFO L225 Difference]: With dead ends: 972436 [2020-07-21 02:34:06,429 INFO L226 Difference]: Without dead ends: 714427 [2020-07-21 02:34:06,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 511 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 02:34:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714427 states. [2020-07-21 02:35:00,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714427 to 713649. [2020-07-21 02:35:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713649 states. [2020-07-21 02:35:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713649 states to 713649 states and 1136771 transitions. [2020-07-21 02:35:02,535 INFO L78 Accepts]: Start accepts. Automaton has 713649 states and 1136771 transitions. Word has length 513 [2020-07-21 02:35:02,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:35:02,536 INFO L479 AbstractCegarLoop]: Abstraction has 713649 states and 1136771 transitions. [2020-07-21 02:35:02,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:35:02,536 INFO L276 IsEmpty]: Start isEmpty. Operand 713649 states and 1136771 transitions. [2020-07-21 02:35:02,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2020-07-21 02:35:02,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:35:02,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:35:03,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:35:03,086 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:35:03,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:35:03,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1145739967, now seen corresponding path program 1 times [2020-07-21 02:35:03,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:35:03,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482473750] [2020-07-21 02:35:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:35:03,508 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:35:03,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:35:03,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 2141 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:35:03,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:35:03,744 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 02:35:03,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:35:03,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482473750] [2020-07-21 02:35:03,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:35:03,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 02:35:03,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560531005] [2020-07-21 02:35:03,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:35:03,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:35:03,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:35:03,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:35:03,746 INFO L87 Difference]: Start difference. First operand 713649 states and 1136771 transitions. Second operand 5 states. [2020-07-21 02:35:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:35:43,532 INFO L93 Difference]: Finished difference Result 949147 states and 1514181 transitions. [2020-07-21 02:35:43,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:35:43,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 513 [2020-07-21 02:35:43,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:35:44,167 INFO L225 Difference]: With dead ends: 949147 [2020-07-21 02:35:44,167 INFO L226 Difference]: Without dead ends: 453259 [2020-07-21 02:35:44,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 02:35:44,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453259 states. [2020-07-21 02:36:23,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453259 to 453259. [2020-07-21 02:36:23,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453259 states. [2020-07-21 02:36:23,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453259 states to 453259 states and 725035 transitions. [2020-07-21 02:36:23,924 INFO L78 Accepts]: Start accepts. Automaton has 453259 states and 725035 transitions. Word has length 513 [2020-07-21 02:36:23,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:36:23,925 INFO L479 AbstractCegarLoop]: Abstraction has 453259 states and 725035 transitions. [2020-07-21 02:36:23,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:36:23,925 INFO L276 IsEmpty]: Start isEmpty. Operand 453259 states and 725035 transitions. [2020-07-21 02:36:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2020-07-21 02:36:24,186 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:36:24,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:36:24,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:36:24,387 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:36:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:36:24,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1730665727, now seen corresponding path program 1 times [2020-07-21 02:36:24,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:36:24,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164800246] [2020-07-21 02:36:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:36:25,613 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:36:25,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:36:25,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 2143 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:36:25,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:36:25,814 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 02:36:25,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:36:25,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164800246] [2020-07-21 02:36:25,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:36:25,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:36:25,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717935468] [2020-07-21 02:36:25,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:36:25,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:36:25,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:36:25,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:36:25,816 INFO L87 Difference]: Start difference. First operand 453259 states and 725035 transitions. Second operand 4 states. [2020-07-21 02:37:27,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:37:27,642 INFO L93 Difference]: Finished difference Result 1347329 states and 2156569 transitions. [2020-07-21 02:37:27,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:37:27,643 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 513 [2020-07-21 02:37:27,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:37:29,153 INFO L225 Difference]: With dead ends: 1347329 [2020-07-21 02:37:29,153 INFO L226 Difference]: Without dead ends: 896525 [2020-07-21 02:37:29,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 510 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 02:37:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896525 states. [2020-07-21 02:38:52,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896525 to 895316. [2020-07-21 02:38:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895316 states. [2020-07-21 02:38:55,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895316 states to 895316 states and 1427442 transitions. [2020-07-21 02:38:55,244 INFO L78 Accepts]: Start accepts. Automaton has 895316 states and 1427442 transitions. Word has length 513 [2020-07-21 02:38:55,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:38:55,245 INFO L479 AbstractCegarLoop]: Abstraction has 895316 states and 1427442 transitions. [2020-07-21 02:38:55,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:38:55,245 INFO L276 IsEmpty]: Start isEmpty. Operand 895316 states and 1427442 transitions. [2020-07-21 02:38:55,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2020-07-21 02:38:55,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:38:55,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:38:56,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:38:56,067 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:38:56,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:38:56,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1433545021, now seen corresponding path program 1 times [2020-07-21 02:38:56,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:38:56,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083369642] [2020-07-21 02:38:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:38:56,439 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:38:56,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:38:56,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:38:56,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:38:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:38:56,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:38:56,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083369642] [2020-07-21 02:38:56,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:38:56,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:38:56,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844231331] [2020-07-21 02:38:56,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:38:56,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:38:56,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:38:56,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:38:56,577 INFO L87 Difference]: Start difference. First operand 895316 states and 1427442 transitions. Second operand 4 states.