/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:21:22,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:21:22,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:21:22,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:21:22,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:21:22,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:21:22,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:21:22,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:21:22,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:21:22,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:21:22,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:21:22,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:21:22,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:21:22,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:21:22,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:21:22,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:21:22,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:21:22,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:21:22,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:21:22,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:21:22,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:21:22,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:21:22,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:21:22,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:21:22,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:21:22,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:21:22,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:21:22,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:21:22,703 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 12:21:22,717 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:21:22,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:21:22,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:21:22,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:21:22,719 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:21:22,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:21:22,719 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:21:22,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:21:22,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:21:22,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:21:22,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:21:22,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:21:22,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:21:22,721 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:21:22,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:21:22,721 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:21:22,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:21:22,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:21:22,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:21:22,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:21:22,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:21:22,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:21:22,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:21:22,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:21:22,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:21:22,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:21:22,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:22,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:21:22,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:21:22,724 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 -> NOT_INCREMENTALLY [2020-07-21 12:21:22,991 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:21:23,004 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:21:23,008 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:21:23,009 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:21:23,010 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:21:23,011 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 12:21:23,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b063e7e2e/0e00211a46cb41608e1b726149e3a863/FLAGd7942a577 [2020-07-21 12:21:23,751 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:21:23,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 12:21:23,769 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b063e7e2e/0e00211a46cb41608e1b726149e3a863/FLAGd7942a577 [2020-07-21 12:21:23,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b063e7e2e/0e00211a46cb41608e1b726149e3a863 [2020-07-21 12:21:23,928 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:21:23,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:21:23,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:21:23,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:21:23,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:21:23,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:21:23" (1/1) ... [2020-07-21 12:21:23,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cbc74e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:23, skipping insertion in model container [2020-07-21 12:21:23,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:21:23" (1/1) ... [2020-07-21 12:21:23,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:21:24,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:21:25,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:21:25,154 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:21:25,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:21:25,882 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:21:25,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:25 WrapperNode [2020-07-21 12:21:25,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:21:25,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:21:25,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:21:25,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:21:25,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:25" (1/1) ... [2020-07-21 12:21:25,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:25" (1/1) ... [2020-07-21 12:21:25,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:25" (1/1) ... [2020-07-21 12:21:25,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:25" (1/1) ... [2020-07-21 12:21:25,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:25" (1/1) ... [2020-07-21 12:21:26,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:25" (1/1) ... [2020-07-21 12:21:26,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:25" (1/1) ... [2020-07-21 12:21:26,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:21:26,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:21:26,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:21:26,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:21:26,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:25" (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 12:21:26,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:21:26,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:21:26,144 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:21:26,144 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:21:26,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:21:26,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 12:21:26,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 12:21:26,145 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 12:21:26,145 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:21:26,145 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:21:26,145 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 12:21:26,146 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 12:21:26,146 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 12:21:26,146 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 12:21:26,146 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 12:21:26,146 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 12:21:26,147 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 12:21:26,147 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 12:21:26,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:21:26,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:21:26,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:21:28,479 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:21:28,480 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:21:28,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:21:28 BoogieIcfgContainer [2020-07-21 12:21:28,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:21:28,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:21:28,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:21:28,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:21:28,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:21:23" (1/3) ... [2020-07-21 12:21:28,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@847024d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:21:28, skipping insertion in model container [2020-07-21 12:21:28,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:21:25" (2/3) ... [2020-07-21 12:21:28,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@847024d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:21:28, skipping insertion in model container [2020-07-21 12:21:28,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:21:28" (3/3) ... [2020-07-21 12:21:28,498 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 12:21:28,508 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:21:28,518 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:21:28,532 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:21:28,559 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:21:28,559 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:21:28,559 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:21:28,560 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:21:28,560 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:21:28,560 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:21:28,560 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:21:28,560 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:21:28,593 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-21 12:21:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 12:21:28,621 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:28,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:28,623 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:28,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:28,630 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-21 12:21:28,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:28,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093185359] [2020-07-21 12:21:28,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:29,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 2101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:21:29,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:29,551 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 12:21:29,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:29,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093185359] [2020-07-21 12:21:29,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:29,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:21:29,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721666608] [2020-07-21 12:21:29,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:21:29,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:29,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:21:29,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:21:29,576 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-21 12:21:29,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:29,891 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-07-21 12:21:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:21:29,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-21 12:21:29,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:29,921 INFO L225 Difference]: With dead ends: 2333 [2020-07-21 12:21:29,921 INFO L226 Difference]: Without dead ends: 1545 [2020-07-21 12:21:29,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:21:29,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-07-21 12:21:30,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-07-21 12:21:30,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-07-21 12:21:30,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-07-21 12:21:30,086 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-07-21 12:21:30,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:30,087 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-07-21 12:21:30,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:21:30,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-07-21 12:21:30,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 12:21:30,094 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:30,094 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] [2020-07-21 12:21:30,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:30,308 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:30,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:30,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-07-21 12:21:30,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:30,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672030096] [2020-07-21 12:21:30,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:30,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:30,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:30,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:30,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672030096] [2020-07-21 12:21:30,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:30,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:30,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087644712] [2020-07-21 12:21:30,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:30,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:30,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:30,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:30,928 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 3 states. [2020-07-21 12:21:31,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:31,136 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-07-21 12:21:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:31,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 12:21:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:31,155 INFO L225 Difference]: With dead ends: 4438 [2020-07-21 12:21:31,156 INFO L226 Difference]: Without dead ends: 3024 [2020-07-21 12:21:31,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-07-21 12:21:31,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-07-21 12:21:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-07-21 12:21:31,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-07-21 12:21:31,344 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-07-21 12:21:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:31,345 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-07-21 12:21:31,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-07-21 12:21:31,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 12:21:31,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:31,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:31,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:31,576 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-07-21 12:21:31,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:31,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487927627] [2020-07-21 12:21:31,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:32,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 2106 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:32,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:32,203 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 12:21:32,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:32,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487927627] [2020-07-21 12:21:32,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:32,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:32,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037123712] [2020-07-21 12:21:32,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:32,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:32,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:32,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:32,206 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 3 states. [2020-07-21 12:21:32,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:32,454 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-07-21 12:21:32,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:32,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 12:21:32,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:32,499 INFO L225 Difference]: With dead ends: 8991 [2020-07-21 12:21:32,500 INFO L226 Difference]: Without dead ends: 6011 [2020-07-21 12:21:32,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-07-21 12:21:32,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-07-21 12:21:32,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-07-21 12:21:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-07-21 12:21:32,749 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-07-21 12:21:32,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:32,750 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-07-21 12:21:32,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-07-21 12:21:32,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 12:21:32,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:32,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:32,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:32,977 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:32,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:32,978 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-07-21 12:21:32,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:32,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055692970] [2020-07-21 12:21:32,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:33,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:33,513 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 12:21:33,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:33,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055692970] [2020-07-21 12:21:33,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:33,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:33,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473125062] [2020-07-21 12:21:33,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:33,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:33,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:33,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:33,516 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 3 states. [2020-07-21 12:21:33,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:33,786 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-07-21 12:21:33,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:33,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 12:21:33,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:33,816 INFO L225 Difference]: With dead ends: 9010 [2020-07-21 12:21:33,816 INFO L226 Difference]: Without dead ends: 6029 [2020-07-21 12:21:33,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:33,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-07-21 12:21:33,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-07-21 12:21:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-07-21 12:21:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-07-21 12:21:33,998 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-07-21 12:21:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:33,998 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-07-21 12:21:33,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:33,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-07-21 12:21:34,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 12:21:34,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:34,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:34,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:34,222 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:34,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:34,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-07-21 12:21:34,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:34,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024362064] [2020-07-21 12:21:34,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:34,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:34,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:34,778 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 12:21:34,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:34,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024362064] [2020-07-21 12:21:34,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:34,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:34,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314183609] [2020-07-21 12:21:34,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:34,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:34,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:34,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:34,781 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 3 states. [2020-07-21 12:21:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:35,082 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-07-21 12:21:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:35,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 12:21:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:35,118 INFO L225 Difference]: With dead ends: 8718 [2020-07-21 12:21:35,119 INFO L226 Difference]: Without dead ends: 5904 [2020-07-21 12:21:35,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:35,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-07-21 12:21:35,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-07-21 12:21:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-07-21 12:21:35,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-07-21 12:21:35,405 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-07-21 12:21:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:35,406 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-07-21 12:21:35,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-07-21 12:21:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 12:21:35,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:35,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:35,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:35,644 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:35,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:35,645 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-07-21 12:21:35,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:35,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225456089] [2020-07-21 12:21:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:36,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 2108 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:21:36,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:36,121 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 12:21:36,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:36,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225456089] [2020-07-21 12:21:36,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:36,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:21:36,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676441281] [2020-07-21 12:21:36,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:21:36,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:36,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:21:36,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:21:36,124 INFO L87 Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 4 states. [2020-07-21 12:21:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:36,624 INFO L93 Difference]: Finished difference Result 16157 states and 24615 transitions. [2020-07-21 12:21:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:21:36,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-21 12:21:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:36,662 INFO L225 Difference]: With dead ends: 16157 [2020-07-21 12:21:36,662 INFO L226 Difference]: Without dead ends: 10795 [2020-07-21 12:21:36,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:21:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10795 states. [2020-07-21 12:21:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10795 to 6137. [2020-07-21 12:21:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6137 states. [2020-07-21 12:21:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6137 states to 6137 states and 9444 transitions. [2020-07-21 12:21:37,129 INFO L78 Accepts]: Start accepts. Automaton has 6137 states and 9444 transitions. Word has length 328 [2020-07-21 12:21:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:37,130 INFO L479 AbstractCegarLoop]: Abstraction has 6137 states and 9444 transitions. [2020-07-21 12:21:37,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:21:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 6137 states and 9444 transitions. [2020-07-21 12:21:37,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 12:21:37,145 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:37,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:37,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:37,360 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:37,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:37,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1740117251, now seen corresponding path program 1 times [2020-07-21 12:21:37,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:37,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917006095] [2020-07-21 12:21:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:37,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 2113 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:37,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:37,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:37,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917006095] [2020-07-21 12:21:37,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:37,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:37,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7190652] [2020-07-21 12:21:37,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:37,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:37,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:37,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:37,783 INFO L87 Difference]: Start difference. First operand 6137 states and 9444 transitions. Second operand 3 states. [2020-07-21 12:21:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:38,428 INFO L93 Difference]: Finished difference Result 16841 states and 25613 transitions. [2020-07-21 12:21:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:38,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 12:21:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:38,463 INFO L225 Difference]: With dead ends: 16841 [2020-07-21 12:21:38,464 INFO L226 Difference]: Without dead ends: 11507 [2020-07-21 12:21:38,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:38,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11507 states. [2020-07-21 12:21:38,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11507 to 6241. [2020-07-21 12:21:38,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6241 states. [2020-07-21 12:21:38,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6241 states to 6241 states and 9587 transitions. [2020-07-21 12:21:38,898 INFO L78 Accepts]: Start accepts. Automaton has 6241 states and 9587 transitions. Word has length 330 [2020-07-21 12:21:38,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:38,899 INFO L479 AbstractCegarLoop]: Abstraction has 6241 states and 9587 transitions. [2020-07-21 12:21:38,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:38,899 INFO L276 IsEmpty]: Start isEmpty. Operand 6241 states and 9587 transitions. [2020-07-21 12:21:38,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 12:21:38,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:38,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:39,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:39,128 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:39,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:39,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1227056241, now seen corresponding path program 1 times [2020-07-21 12:21:39,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:39,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964447298] [2020-07-21 12:21:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:39,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 2128 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:21:39,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:39,744 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 12:21:39,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:39,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964447298] [2020-07-21 12:21:39,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:39,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:21:39,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768376313] [2020-07-21 12:21:39,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:21:39,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:39,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:21:39,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:21:39,748 INFO L87 Difference]: Start difference. First operand 6241 states and 9587 transitions. Second operand 8 states. [2020-07-21 12:21:42,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:42,150 INFO L93 Difference]: Finished difference Result 15832 states and 24500 transitions. [2020-07-21 12:21:42,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:21:42,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 330 [2020-07-21 12:21:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:42,174 INFO L225 Difference]: With dead ends: 15832 [2020-07-21 12:21:42,174 INFO L226 Difference]: Without dead ends: 11586 [2020-07-21 12:21:42,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:21:42,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2020-07-21 12:21:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 8093. [2020-07-21 12:21:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8093 states. [2020-07-21 12:21:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8093 states to 8093 states and 12299 transitions. [2020-07-21 12:21:42,626 INFO L78 Accepts]: Start accepts. Automaton has 8093 states and 12299 transitions. Word has length 330 [2020-07-21 12:21:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:42,627 INFO L479 AbstractCegarLoop]: Abstraction has 8093 states and 12299 transitions. [2020-07-21 12:21:42,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:21:42,627 INFO L276 IsEmpty]: Start isEmpty. Operand 8093 states and 12299 transitions. [2020-07-21 12:21:42,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 12:21:42,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:42,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:42,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:42,860 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:42,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1247460253, now seen corresponding path program 1 times [2020-07-21 12:21:42,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:42,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393828702] [2020-07-21 12:21:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:43,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:43,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:43,327 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 12:21:43,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:43,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393828702] [2020-07-21 12:21:43,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:43,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:43,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110483440] [2020-07-21 12:21:43,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:43,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:43,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:43,330 INFO L87 Difference]: Start difference. First operand 8093 states and 12299 transitions. Second operand 3 states. [2020-07-21 12:21:43,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:43,994 INFO L93 Difference]: Finished difference Result 16173 states and 24573 transitions. [2020-07-21 12:21:43,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:43,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 12:21:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:44,018 INFO L225 Difference]: With dead ends: 16173 [2020-07-21 12:21:44,018 INFO L226 Difference]: Without dead ends: 9971 [2020-07-21 12:21:44,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:44,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9971 states. [2020-07-21 12:21:44,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9971 to 8633. [2020-07-21 12:21:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8633 states. [2020-07-21 12:21:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8633 states to 8633 states and 13191 transitions. [2020-07-21 12:21:44,529 INFO L78 Accepts]: Start accepts. Automaton has 8633 states and 13191 transitions. Word has length 330 [2020-07-21 12:21:44,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:44,529 INFO L479 AbstractCegarLoop]: Abstraction has 8633 states and 13191 transitions. [2020-07-21 12:21:44,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:44,530 INFO L276 IsEmpty]: Start isEmpty. Operand 8633 states and 13191 transitions. [2020-07-21 12:21:44,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 12:21:44,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:44,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:44,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:44,764 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:44,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:44,764 INFO L82 PathProgramCache]: Analyzing trace with hash -763365383, now seen corresponding path program 1 times [2020-07-21 12:21:44,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:44,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781560784] [2020-07-21 12:21:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:45,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:45,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:45,403 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 12:21:45,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:45,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781560784] [2020-07-21 12:21:45,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:45,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:45,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273240467] [2020-07-21 12:21:45,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:45,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:45,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:45,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:45,407 INFO L87 Difference]: Start difference. First operand 8633 states and 13191 transitions. Second operand 3 states. [2020-07-21 12:21:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:45,942 INFO L93 Difference]: Finished difference Result 24149 states and 36591 transitions. [2020-07-21 12:21:45,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:45,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-21 12:21:45,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:45,972 INFO L225 Difference]: With dead ends: 24149 [2020-07-21 12:21:45,972 INFO L226 Difference]: Without dead ends: 16416 [2020-07-21 12:21:45,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:46,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16416 states. [2020-07-21 12:21:47,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16416 to 8758. [2020-07-21 12:21:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8758 states. [2020-07-21 12:21:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8758 states to 8758 states and 13337 transitions. [2020-07-21 12:21:47,145 INFO L78 Accepts]: Start accepts. Automaton has 8758 states and 13337 transitions. Word has length 331 [2020-07-21 12:21:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:47,145 INFO L479 AbstractCegarLoop]: Abstraction has 8758 states and 13337 transitions. [2020-07-21 12:21:47,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 8758 states and 13337 transitions. [2020-07-21 12:21:47,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 12:21:47,157 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:47,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:47,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:47,368 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:47,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:47,369 INFO L82 PathProgramCache]: Analyzing trace with hash 2000347144, now seen corresponding path program 1 times [2020-07-21 12:21:47,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:47,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375649670] [2020-07-21 12:21:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:47,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 2123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:21:47,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:48,028 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 12:21:48,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:48,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375649670] [2020-07-21 12:21:48,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:48,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:21:48,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922775412] [2020-07-21 12:21:48,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:21:48,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:48,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:21:48,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:21:48,035 INFO L87 Difference]: Start difference. First operand 8758 states and 13337 transitions. Second operand 8 states. [2020-07-21 12:21:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:49,999 INFO L93 Difference]: Finished difference Result 19643 states and 30271 transitions. [2020-07-21 12:21:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:21:50,000 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 332 [2020-07-21 12:21:50,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:50,017 INFO L225 Difference]: With dead ends: 19643 [2020-07-21 12:21:50,018 INFO L226 Difference]: Without dead ends: 16573 [2020-07-21 12:21:50,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:21:50,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16573 states. [2020-07-21 12:21:50,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16573 to 10457. [2020-07-21 12:21:50,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10457 states. [2020-07-21 12:21:50,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10457 states to 10457 states and 15924 transitions. [2020-07-21 12:21:50,742 INFO L78 Accepts]: Start accepts. Automaton has 10457 states and 15924 transitions. Word has length 332 [2020-07-21 12:21:50,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:50,743 INFO L479 AbstractCegarLoop]: Abstraction has 10457 states and 15924 transitions. [2020-07-21 12:21:50,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:21:50,743 INFO L276 IsEmpty]: Start isEmpty. Operand 10457 states and 15924 transitions. [2020-07-21 12:21:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 12:21:50,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:50,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:50,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:50,954 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:50,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:50,955 INFO L82 PathProgramCache]: Analyzing trace with hash -160876658, now seen corresponding path program 1 times [2020-07-21 12:21:50,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:50,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786516163] [2020-07-21 12:21:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:51,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 2119 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:51,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:51,424 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 12:21:51,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:51,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786516163] [2020-07-21 12:21:51,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:51,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:51,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057884797] [2020-07-21 12:21:51,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:51,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:51,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:51,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:51,427 INFO L87 Difference]: Start difference. First operand 10457 states and 15924 transitions. Second operand 3 states. [2020-07-21 12:21:52,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:52,247 INFO L93 Difference]: Finished difference Result 22162 states and 33933 transitions. [2020-07-21 12:21:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:52,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 12:21:52,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:52,259 INFO L225 Difference]: With dead ends: 22162 [2020-07-21 12:21:52,259 INFO L226 Difference]: Without dead ends: 14009 [2020-07-21 12:21:52,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14009 states. [2020-07-21 12:21:52,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14009 to 12559. [2020-07-21 12:21:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12559 states. [2020-07-21 12:21:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12559 states to 12559 states and 19294 transitions. [2020-07-21 12:21:52,853 INFO L78 Accepts]: Start accepts. Automaton has 12559 states and 19294 transitions. Word has length 332 [2020-07-21 12:21:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:52,854 INFO L479 AbstractCegarLoop]: Abstraction has 12559 states and 19294 transitions. [2020-07-21 12:21:52,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 12559 states and 19294 transitions. [2020-07-21 12:21:52,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 12:21:52,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:52,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:53,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:53,065 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:53,066 INFO L82 PathProgramCache]: Analyzing trace with hash 26974230, now seen corresponding path program 1 times [2020-07-21 12:21:53,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:53,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815628151] [2020-07-21 12:21:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:53,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 2115 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:21:53,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:53,539 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 12:21:53,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:53,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815628151] [2020-07-21 12:21:53,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:53,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:21:53,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550932447] [2020-07-21 12:21:53,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:21:53,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:53,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:21:53,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:21:53,543 INFO L87 Difference]: Start difference. First operand 12559 states and 19294 transitions. Second operand 4 states. [2020-07-21 12:21:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:54,190 INFO L93 Difference]: Finished difference Result 23174 states and 35485 transitions. [2020-07-21 12:21:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:21:54,191 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 12:21:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:54,202 INFO L225 Difference]: With dead ends: 23174 [2020-07-21 12:21:54,203 INFO L226 Difference]: Without dead ends: 11478 [2020-07-21 12:21:54,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:21:54,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11478 states. [2020-07-21 12:21:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11478 to 11458. [2020-07-21 12:21:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11458 states. [2020-07-21 12:21:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11458 states to 11458 states and 17608 transitions. [2020-07-21 12:21:54,727 INFO L78 Accepts]: Start accepts. Automaton has 11458 states and 17608 transitions. Word has length 332 [2020-07-21 12:21:54,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:54,727 INFO L479 AbstractCegarLoop]: Abstraction has 11458 states and 17608 transitions. [2020-07-21 12:21:54,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:21:54,727 INFO L276 IsEmpty]: Start isEmpty. Operand 11458 states and 17608 transitions. [2020-07-21 12:21:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 12:21:54,736 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:54,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:54,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:54,952 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:54,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:54,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1537943031, now seen corresponding path program 1 times [2020-07-21 12:21:54,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:54,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549098097] [2020-07-21 12:21:54,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:55,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:21:55,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:55,470 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 12:21:55,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:55,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549098097] [2020-07-21 12:21:55,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:55,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:21:55,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653052206] [2020-07-21 12:21:55,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:21:55,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:55,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:21:55,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:21:55,472 INFO L87 Difference]: Start difference. First operand 11458 states and 17608 transitions. Second operand 4 states. [2020-07-21 12:21:56,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:56,617 INFO L93 Difference]: Finished difference Result 26120 states and 40662 transitions. [2020-07-21 12:21:56,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:21:56,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-21 12:21:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:56,649 INFO L225 Difference]: With dead ends: 26120 [2020-07-21 12:21:56,649 INFO L226 Difference]: Without dead ends: 20527 [2020-07-21 12:21:56,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:21:56,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20527 states. [2020-07-21 12:21:58,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20527 to 20525. [2020-07-21 12:21:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20525 states. [2020-07-21 12:21:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20525 states to 20525 states and 31568 transitions. [2020-07-21 12:21:58,626 INFO L78 Accepts]: Start accepts. Automaton has 20525 states and 31568 transitions. Word has length 333 [2020-07-21 12:21:58,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:58,626 INFO L479 AbstractCegarLoop]: Abstraction has 20525 states and 31568 transitions. [2020-07-21 12:21:58,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:21:58,626 INFO L276 IsEmpty]: Start isEmpty. Operand 20525 states and 31568 transitions. [2020-07-21 12:21:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 12:21:58,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:58,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:58,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:58,838 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:58,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:58,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1942664128, now seen corresponding path program 1 times [2020-07-21 12:21:58,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:58,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016487293] [2020-07-21 12:21:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:59,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 2125 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:21:59,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:59,364 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 12:21:59,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:59,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016487293] [2020-07-21 12:21:59,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:59,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:21:59,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313426159] [2020-07-21 12:21:59,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:21:59,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:59,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:21:59,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:21:59,371 INFO L87 Difference]: Start difference. First operand 20525 states and 31568 transitions. Second operand 4 states. [2020-07-21 12:22:01,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:01,853 INFO L93 Difference]: Finished difference Result 60368 states and 92806 transitions. [2020-07-21 12:22:01,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:22:01,854 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-21 12:22:01,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:01,904 INFO L225 Difference]: With dead ends: 60368 [2020-07-21 12:22:01,904 INFO L226 Difference]: Without dead ends: 39915 [2020-07-21 12:22:01,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:22:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39915 states. [2020-07-21 12:22:04,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39915 to 39913. [2020-07-21 12:22:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39913 states. [2020-07-21 12:22:04,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39913 states to 39913 states and 61083 transitions. [2020-07-21 12:22:04,180 INFO L78 Accepts]: Start accepts. Automaton has 39913 states and 61083 transitions. Word has length 333 [2020-07-21 12:22:04,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:04,180 INFO L479 AbstractCegarLoop]: Abstraction has 39913 states and 61083 transitions. [2020-07-21 12:22:04,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:22:04,180 INFO L276 IsEmpty]: Start isEmpty. Operand 39913 states and 61083 transitions. [2020-07-21 12:22:04,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 12:22:04,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:04,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:04,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:04,406 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:04,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:04,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1906330768, now seen corresponding path program 1 times [2020-07-21 12:22:04,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:04,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175829107] [2020-07-21 12:22:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:22:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:04,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 2128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:04,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:04,890 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 12:22:04,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:04,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175829107] [2020-07-21 12:22:04,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:04,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:04,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098631043] [2020-07-21 12:22:04,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:04,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:04,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:04,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:04,893 INFO L87 Difference]: Start difference. First operand 39913 states and 61083 transitions. Second operand 3 states. [2020-07-21 12:22:09,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:09,570 INFO L93 Difference]: Finished difference Result 116533 states and 178115 transitions. [2020-07-21 12:22:09,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:09,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 12:22:09,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:09,658 INFO L225 Difference]: With dead ends: 116533 [2020-07-21 12:22:09,658 INFO L226 Difference]: Without dead ends: 77869 [2020-07-21 12:22:09,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77869 states. [2020-07-21 12:22:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77869 to 77867. [2020-07-21 12:22:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77867 states. [2020-07-21 12:22:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77867 states to 77867 states and 118696 transitions. [2020-07-21 12:22:14,120 INFO L78 Accepts]: Start accepts. Automaton has 77867 states and 118696 transitions. Word has length 335 [2020-07-21 12:22:14,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:14,121 INFO L479 AbstractCegarLoop]: Abstraction has 77867 states and 118696 transitions. [2020-07-21 12:22:14,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 77867 states and 118696 transitions. [2020-07-21 12:22:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 12:22:14,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:14,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:14,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:14,377 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:14,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:14,378 INFO L82 PathProgramCache]: Analyzing trace with hash -496610298, now seen corresponding path program 1 times [2020-07-21 12:22:14,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:14,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868206573] [2020-07-21 12:22:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:22:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:14,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 2129 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:22:14,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:14,943 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 12:22:14,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:14,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868206573] [2020-07-21 12:22:14,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:14,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:22:14,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882457309] [2020-07-21 12:22:14,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:22:14,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:14,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:22:14,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:22:14,945 INFO L87 Difference]: Start difference. First operand 77867 states and 118696 transitions. Second operand 8 states. [2020-07-21 12:22:27,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:27,206 INFO L93 Difference]: Finished difference Result 194089 states and 298278 transitions. [2020-07-21 12:22:27,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:22:27,206 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 336 [2020-07-21 12:22:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:27,418 INFO L225 Difference]: With dead ends: 194089 [2020-07-21 12:22:27,418 INFO L226 Difference]: Without dead ends: 174805 [2020-07-21 12:22:27,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:22:27,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174805 states. [2020-07-21 12:22:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174805 to 94535. [2020-07-21 12:22:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94535 states. [2020-07-21 12:22:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94535 states to 94535 states and 144036 transitions. [2020-07-21 12:22:36,080 INFO L78 Accepts]: Start accepts. Automaton has 94535 states and 144036 transitions. Word has length 336 [2020-07-21 12:22:36,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:36,081 INFO L479 AbstractCegarLoop]: Abstraction has 94535 states and 144036 transitions. [2020-07-21 12:22:36,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:22:36,081 INFO L276 IsEmpty]: Start isEmpty. Operand 94535 states and 144036 transitions. [2020-07-21 12:22:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 12:22:36,119 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:36,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:36,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:36,320 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:36,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:36,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1180141058, now seen corresponding path program 1 times [2020-07-21 12:22:36,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:36,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891888662] [2020-07-21 12:22:36,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:22:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:36,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:36,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:37,226 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 12:22:37,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:37,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891888662] [2020-07-21 12:22:37,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:37,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:37,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100248431] [2020-07-21 12:22:37,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:37,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:37,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:37,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:37,233 INFO L87 Difference]: Start difference. First operand 94535 states and 144036 transitions. Second operand 3 states. [2020-07-21 12:22:47,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:47,482 INFO L93 Difference]: Finished difference Result 227675 states and 348798 transitions. [2020-07-21 12:22:47,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:47,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 12:22:47,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:47,642 INFO L225 Difference]: With dead ends: 227675 [2020-07-21 12:22:47,642 INFO L226 Difference]: Without dead ends: 140329 [2020-07-21 12:22:47,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:47,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140329 states. [2020-07-21 12:22:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140329 to 127767. [2020-07-21 12:22:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127767 states. [2020-07-21 12:22:56,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127767 states to 127767 states and 195876 transitions. [2020-07-21 12:22:56,232 INFO L78 Accepts]: Start accepts. Automaton has 127767 states and 195876 transitions. Word has length 336 [2020-07-21 12:22:56,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:56,232 INFO L479 AbstractCegarLoop]: Abstraction has 127767 states and 195876 transitions. [2020-07-21 12:22:56,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:56,232 INFO L276 IsEmpty]: Start isEmpty. Operand 127767 states and 195876 transitions. [2020-07-21 12:22:56,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 12:22:56,265 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:56,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:22:56,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:56,466 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:56,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:56,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1940830443, now seen corresponding path program 1 times [2020-07-21 12:22:56,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:56,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710661852] [2020-07-21 12:22:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:22:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:56,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:56,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:56,964 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 12:22:56,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:56,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710661852] [2020-07-21 12:22:56,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:56,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:56,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214058387] [2020-07-21 12:22:56,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:56,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:56,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:56,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:56,966 INFO L87 Difference]: Start difference. First operand 127767 states and 195876 transitions. Second operand 3 states. [2020-07-21 12:23:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:14,119 INFO L93 Difference]: Finished difference Result 375740 states and 575792 transitions. [2020-07-21 12:23:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:14,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-21 12:23:14,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:14,959 INFO L225 Difference]: With dead ends: 375740 [2020-07-21 12:23:14,959 INFO L226 Difference]: Without dead ends: 249320 [2020-07-21 12:23:15,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:15,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249320 states. [2020-07-21 12:23:35,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249320 to 249318. [2020-07-21 12:23:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249318 states. [2020-07-21 12:23:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249318 states to 249318 states and 380307 transitions. [2020-07-21 12:23:35,571 INFO L78 Accepts]: Start accepts. Automaton has 249318 states and 380307 transitions. Word has length 337 [2020-07-21 12:23:35,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:35,572 INFO L479 AbstractCegarLoop]: Abstraction has 249318 states and 380307 transitions. [2020-07-21 12:23:35,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 249318 states and 380307 transitions. [2020-07-21 12:23:35,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 12:23:35,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:35,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:35,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:35,844 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:35,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1726977432, now seen corresponding path program 1 times [2020-07-21 12:23:35,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:35,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304065652] [2020-07-21 12:23:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:23:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:36,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 2132 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:23:36,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:36,334 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 12:23:36,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:36,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304065652] [2020-07-21 12:23:36,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:36,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:36,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402235198] [2020-07-21 12:23:36,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:36,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:36,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:36,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:36,336 INFO L87 Difference]: Start difference. First operand 249318 states and 380307 transitions. Second operand 4 states. [2020-07-21 12:24:13,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:24:13,363 INFO L93 Difference]: Finished difference Result 678958 states and 1033574 transitions. [2020-07-21 12:24:13,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:24:13,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-21 12:24:13,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:24:13,955 INFO L225 Difference]: With dead ends: 678958 [2020-07-21 12:24:13,955 INFO L226 Difference]: Without dead ends: 432932 [2020-07-21 12:24:14,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:24:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432932 states. [2020-07-21 12:24:33,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432932 to 243898. [2020-07-21 12:24:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243898 states. [2020-07-21 12:24:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243898 states to 243898 states and 371825 transitions. [2020-07-21 12:24:34,016 INFO L78 Accepts]: Start accepts. Automaton has 243898 states and 371825 transitions. Word has length 337 [2020-07-21 12:24:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:24:34,016 INFO L479 AbstractCegarLoop]: Abstraction has 243898 states and 371825 transitions. [2020-07-21 12:24:34,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:24:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 243898 states and 371825 transitions. [2020-07-21 12:24:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-21 12:24:34,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:24:34,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:24:34,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:34,288 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:24:34,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:24:34,289 INFO L82 PathProgramCache]: Analyzing trace with hash 494961172, now seen corresponding path program 1 times [2020-07-21 12:24:34,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:24:34,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638072675] [2020-07-21 12:24:34,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:24:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:24:34,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 2138 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:24:34,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:24:34,750 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 12:24:34,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:24:34,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638072675] [2020-07-21 12:24:34,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:24:34,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:24:34,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982268179] [2020-07-21 12:24:34,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:24:34,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:24:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:24:34,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:24:34,752 INFO L87 Difference]: Start difference. First operand 243898 states and 371825 transitions. Second operand 3 states. [2020-07-21 12:25:14,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:25:14,555 INFO L93 Difference]: Finished difference Result 675356 states and 1028070 transitions. [2020-07-21 12:25:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:25:14,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2020-07-21 12:25:14,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:25:15,226 INFO L225 Difference]: With dead ends: 675356 [2020-07-21 12:25:15,226 INFO L226 Difference]: Without dead ends: 442178 [2020-07-21 12:25:15,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:25:15,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442178 states. [2020-07-21 12:25:41,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442178 to 244379. [2020-07-21 12:25:41,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244379 states. [2020-07-21 12:25:42,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244379 states to 244379 states and 372423 transitions. [2020-07-21 12:25:42,307 INFO L78 Accepts]: Start accepts. Automaton has 244379 states and 372423 transitions. Word has length 340 [2020-07-21 12:25:42,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:25:42,307 INFO L479 AbstractCegarLoop]: Abstraction has 244379 states and 372423 transitions. [2020-07-21 12:25:42,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:25:42,308 INFO L276 IsEmpty]: Start isEmpty. Operand 244379 states and 372423 transitions. [2020-07-21 12:25:42,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 12:25:42,377 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:25:42,377 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] [2020-07-21 12:25:42,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:25:42,579 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:25:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:25:42,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1233391883, now seen corresponding path program 1 times [2020-07-21 12:25:42,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:25:42,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367230209] [2020-07-21 12:25:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:25:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:25:42,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 2143 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:25:42,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:25:43,051 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 12:25:43,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:25:43,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367230209] [2020-07-21 12:25:43,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:25:43,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:25:43,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347511413] [2020-07-21 12:25:43,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:25:43,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:25:43,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:25:43,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:25:43,053 INFO L87 Difference]: Start difference. First operand 244379 states and 372423 transitions. Second operand 3 states. [2020-07-21 12:26:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:26:22,980 INFO L93 Difference]: Finished difference Result 668702 states and 1027223 transitions. [2020-07-21 12:26:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:26:22,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-21 12:26:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:26:23,640 INFO L225 Difference]: With dead ends: 668702 [2020-07-21 12:26:23,641 INFO L226 Difference]: Without dead ends: 436857 [2020-07-21 12:26:23,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 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 12:26:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436857 states. [2020-07-21 12:27:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436857 to 382255. [2020-07-21 12:27:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382255 states. [2020-07-21 12:27:04,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382255 states to 382255 states and 595672 transitions. [2020-07-21 12:27:04,628 INFO L78 Accepts]: Start accepts. Automaton has 382255 states and 595672 transitions. Word has length 341 [2020-07-21 12:27:04,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:27:04,628 INFO L479 AbstractCegarLoop]: Abstraction has 382255 states and 595672 transitions. [2020-07-21 12:27:04,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:27:04,629 INFO L276 IsEmpty]: Start isEmpty. Operand 382255 states and 595672 transitions. [2020-07-21 12:27:04,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 12:27:04,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:27:04,715 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] [2020-07-21 12:27:04,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:27:04,916 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:27:04,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:27:04,917 INFO L82 PathProgramCache]: Analyzing trace with hash -253048940, now seen corresponding path program 1 times [2020-07-21 12:27:04,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:27:04,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204778647] [2020-07-21 12:27:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:27:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:27:05,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 2139 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:27:05,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:27:05,385 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 12:27:05,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:27:05,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204778647] [2020-07-21 12:27:05,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:27:05,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:27:05,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671273546] [2020-07-21 12:27:05,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:27:05,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:27:05,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:27:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:27:05,387 INFO L87 Difference]: Start difference. First operand 382255 states and 595672 transitions. Second operand 4 states. [2020-07-21 12:27:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:40,119 INFO L93 Difference]: Finished difference Result 718230 states and 1118171 transitions. [2020-07-21 12:27:40,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:27:40,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 341 [2020-07-21 12:27:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:40,648 INFO L225 Difference]: With dead ends: 718230 [2020-07-21 12:27:40,648 INFO L226 Difference]: Without dead ends: 341287 [2020-07-21 12:27:40,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 338 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 12:27:41,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341287 states. [2020-07-21 12:28:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341287 to 340960. [2020-07-21 12:28:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340960 states. [2020-07-21 12:28:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340960 states to 340960 states and 530438 transitions. [2020-07-21 12:28:17,418 INFO L78 Accepts]: Start accepts. Automaton has 340960 states and 530438 transitions. Word has length 341 [2020-07-21 12:28:17,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:28:17,419 INFO L479 AbstractCegarLoop]: Abstraction has 340960 states and 530438 transitions. [2020-07-21 12:28:17,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:28:17,419 INFO L276 IsEmpty]: Start isEmpty. Operand 340960 states and 530438 transitions. [2020-07-21 12:28:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 12:28:17,482 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:28:17,483 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] [2020-07-21 12:28:17,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:28:17,683 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:28:17,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:28:17,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1057024975, now seen corresponding path program 1 times [2020-07-21 12:28:17,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:28:17,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556046124] [2020-07-21 12:28:17,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:28:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:28:18,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 2153 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:28:18,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:28:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:28:18,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:28:18,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556046124] [2020-07-21 12:28:18,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:28:18,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:28:18,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132313406] [2020-07-21 12:28:18,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:28:18,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:28:18,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:28:18,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:28:18,139 INFO L87 Difference]: Start difference. First operand 340960 states and 530438 transitions. Second operand 3 states. [2020-07-21 12:29:20,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:20,707 INFO L93 Difference]: Finished difference Result 994710 states and 1546472 transitions. [2020-07-21 12:29:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:20,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 12:29:20,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:21,730 INFO L225 Difference]: With dead ends: 994710 [2020-07-21 12:29:21,731 INFO L226 Difference]: Without dead ends: 665512 [2020-07-21 12:29:21,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 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 12:29:22,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665512 states. [2020-07-21 12:30:28,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665512 to 665510. [2020-07-21 12:30:28,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665510 states. [2020-07-21 12:30:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665510 states to 665510 states and 1027052 transitions. [2020-07-21 12:30:29,568 INFO L78 Accepts]: Start accepts. Automaton has 665510 states and 1027052 transitions. Word has length 342 [2020-07-21 12:30:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:30:29,569 INFO L479 AbstractCegarLoop]: Abstraction has 665510 states and 1027052 transitions. [2020-07-21 12:30:29,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:30:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 665510 states and 1027052 transitions. [2020-07-21 12:30:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 12:30:29,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:30:29,696 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] [2020-07-21 12:30:29,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:29,897 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:30:29,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:30:29,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1023408404, now seen corresponding path program 1 times [2020-07-21 12:30:29,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:30:29,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256449146] [2020-07-21 12:30:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:30:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:30:39,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 12:30:39,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:30:39,952 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 12:30:39,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:30:39,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256449146] [2020-07-21 12:30:39,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:30:39,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 12:30:39,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660138641] [2020-07-21 12:30:39,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 12:30:39,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:30:39,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 12:30:39,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 12:30:39,954 INFO L87 Difference]: Start difference. First operand 665510 states and 1027052 transitions. Second operand 9 states.