/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:46:03,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:46:03,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:46:03,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:46:03,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:46:03,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:46:03,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:46:03,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:46:03,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:46:03,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:46:03,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:46:03,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:46:03,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:46:03,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:46:03,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:46:03,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:46:03,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:46:03,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:46:03,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:46:03,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:46:03,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:46:03,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:46:03,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:46:03,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:46:03,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:46:03,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:46:03,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:46:03,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:46:03,829 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 14:46:03,864 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:46:03,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:46:03,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:46:03,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:46:03,868 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:46:03,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:46:03,869 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:46:03,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:46:03,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:46:03,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:46:03,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:46:03,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:46:03,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:46:03,870 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:46:03,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:46:03,871 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:46:03,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:46:03,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:46:03,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:46:03,873 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:46:03,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:46:03,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:46:03,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:46:03,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:46:03,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:46:03,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:46:03,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:03,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:46:03,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:46:03,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:46:04,204 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:46:04,218 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:46:04,222 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:46:04,223 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:46:04,224 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:46:04,225 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 14:46:04,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48def0180/fc7ffd0e81464788a314d7bd23977c43/FLAGa44334c12 [2020-07-21 14:46:04,970 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:46:04,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 14:46:04,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48def0180/fc7ffd0e81464788a314d7bd23977c43/FLAGa44334c12 [2020-07-21 14:46:05,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48def0180/fc7ffd0e81464788a314d7bd23977c43 [2020-07-21 14:46:05,147 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:46:05,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:46:05,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:46:05,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:46:05,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:46:05,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:46:05" (1/1) ... [2020-07-21 14:46:05,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145e03eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:05, skipping insertion in model container [2020-07-21 14:46:05,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:46:05" (1/1) ... [2020-07-21 14:46:05,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:46:05,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:46:06,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:46:06,232 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:46:06,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:46:06,947 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:46:06,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:06 WrapperNode [2020-07-21 14:46:06,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:46:06,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:46:06,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:46:06,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:46:06,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:06" (1/1) ... [2020-07-21 14:46:06,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:06" (1/1) ... [2020-07-21 14:46:06,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:06" (1/1) ... [2020-07-21 14:46:06,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:06" (1/1) ... [2020-07-21 14:46:07,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:06" (1/1) ... [2020-07-21 14:46:07,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:06" (1/1) ... [2020-07-21 14:46:07,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:06" (1/1) ... [2020-07-21 14:46:07,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:46:07,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:46:07,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:46:07,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:46:07,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:46:07,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:46:07,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:46:07,223 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:46:07,223 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:46:07,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:46:07,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 14:46:07,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 14:46:07,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 14:46:07,225 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 14:46:07,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:46:07,226 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:46:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 14:46:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 14:46:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 14:46:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 14:46:07,228 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 14:46:07,228 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 14:46:07,228 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 14:46:07,228 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 14:46:07,229 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:46:07,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:46:07,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:46:09,950 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:46:09,950 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 14:46:09,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:46:09 BoogieIcfgContainer [2020-07-21 14:46:09,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:46:09,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:46:09,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:46:09,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:46:09,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:46:05" (1/3) ... [2020-07-21 14:46:09,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ecbf29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:46:09, skipping insertion in model container [2020-07-21 14:46:09,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:06" (2/3) ... [2020-07-21 14:46:09,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ecbf29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:46:09, skipping insertion in model container [2020-07-21 14:46:09,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:46:09" (3/3) ... [2020-07-21 14:46:09,981 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 14:46:09,992 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:46:10,008 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:46:10,023 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:46:10,051 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:46:10,051 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:46:10,051 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:46:10,052 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:46:10,052 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:46:10,052 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:46:10,052 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:46:10,052 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:46:10,087 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-07-21 14:46:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-21 14:46:10,118 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:10,119 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] [2020-07-21 14:46:10,120 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:10,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:10,126 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-07-21 14:46:10,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:10,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061400038] [2020-07-21 14:46:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:10,635 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:10,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:10,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:46:10,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:11,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:11,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061400038] [2020-07-21 14:46:11,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:11,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:11,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789354699] [2020-07-21 14:46:11,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:11,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:11,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:11,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:11,047 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 4 states. [2020-07-21 14:46:11,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:11,523 INFO L93 Difference]: Finished difference Result 2306 states and 4085 transitions. [2020-07-21 14:46:11,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:46:11,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-21 14:46:11,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:11,552 INFO L225 Difference]: With dead ends: 2306 [2020-07-21 14:46:11,552 INFO L226 Difference]: Without dead ends: 1531 [2020-07-21 14:46:11,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:46:11,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2020-07-21 14:46:11,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1529. [2020-07-21 14:46:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1529 states. [2020-07-21 14:46:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2381 transitions. [2020-07-21 14:46:11,699 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2381 transitions. Word has length 318 [2020-07-21 14:46:11,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:11,700 INFO L479 AbstractCegarLoop]: Abstraction has 1529 states and 2381 transitions. [2020-07-21 14:46:11,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:11,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2381 transitions. [2020-07-21 14:46:11,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-21 14:46:11,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:11,711 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] [2020-07-21 14:46:11,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:11,927 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:11,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:11,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1218408258, now seen corresponding path program 1 times [2020-07-21 14:46:11,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:11,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87600551] [2020-07-21 14:46:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:12,310 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:12,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:12,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:12,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:12,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:12,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87600551] [2020-07-21 14:46:12,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:12,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:12,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871844970] [2020-07-21 14:46:12,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:12,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:12,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:12,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:12,498 INFO L87 Difference]: Start difference. First operand 1529 states and 2381 transitions. Second operand 3 states. [2020-07-21 14:46:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:12,692 INFO L93 Difference]: Finished difference Result 4381 states and 6792 transitions. [2020-07-21 14:46:12,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:12,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 320 [2020-07-21 14:46:12,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:12,709 INFO L225 Difference]: With dead ends: 4381 [2020-07-21 14:46:12,709 INFO L226 Difference]: Without dead ends: 2939 [2020-07-21 14:46:12,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2020-07-21 14:46:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2937. [2020-07-21 14:46:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2937 states. [2020-07-21 14:46:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2937 states to 2937 states and 4539 transitions. [2020-07-21 14:46:12,887 INFO L78 Accepts]: Start accepts. Automaton has 2937 states and 4539 transitions. Word has length 320 [2020-07-21 14:46:12,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:12,888 INFO L479 AbstractCegarLoop]: Abstraction has 2937 states and 4539 transitions. [2020-07-21 14:46:12,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2937 states and 4539 transitions. [2020-07-21 14:46:12,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-21 14:46:12,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:12,899 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] [2020-07-21 14:46:13,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:13,113 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:13,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:13,115 INFO L82 PathProgramCache]: Analyzing trace with hash -234920761, now seen corresponding path program 1 times [2020-07-21 14:46:13,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:13,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208326408] [2020-07-21 14:46:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:13,448 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:13,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:13,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:13,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:13,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:13,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208326408] [2020-07-21 14:46:13,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:13,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:13,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870368933] [2020-07-21 14:46:13,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:13,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:13,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:13,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:13,618 INFO L87 Difference]: Start difference. First operand 2937 states and 4539 transitions. Second operand 3 states. [2020-07-21 14:46:13,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:13,832 INFO L93 Difference]: Finished difference Result 8734 states and 13487 transitions. [2020-07-21 14:46:13,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:13,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 320 [2020-07-21 14:46:13,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:13,861 INFO L225 Difference]: With dead ends: 8734 [2020-07-21 14:46:13,862 INFO L226 Difference]: Without dead ends: 5835 [2020-07-21 14:46:13,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5835 states. [2020-07-21 14:46:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5835 to 2949. [2020-07-21 14:46:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2949 states. [2020-07-21 14:46:14,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4556 transitions. [2020-07-21 14:46:14,034 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4556 transitions. Word has length 320 [2020-07-21 14:46:14,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:14,034 INFO L479 AbstractCegarLoop]: Abstraction has 2949 states and 4556 transitions. [2020-07-21 14:46:14,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:14,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4556 transitions. [2020-07-21 14:46:14,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-07-21 14:46:14,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:14,044 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] [2020-07-21 14:46:14,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:14,259 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:14,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:14,260 INFO L82 PathProgramCache]: Analyzing trace with hash -86973715, now seen corresponding path program 1 times [2020-07-21 14:46:14,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:14,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172568434] [2020-07-21 14:46:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:14,560 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:14,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:14,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:14,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:14,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172568434] [2020-07-21 14:46:14,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:14,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:14,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009831380] [2020-07-21 14:46:14,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:14,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:14,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:14,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:14,760 INFO L87 Difference]: Start difference. First operand 2949 states and 4556 transitions. Second operand 3 states. [2020-07-21 14:46:15,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:15,069 INFO L93 Difference]: Finished difference Result 8731 states and 13475 transitions. [2020-07-21 14:46:15,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:15,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 321 [2020-07-21 14:46:15,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:15,098 INFO L225 Difference]: With dead ends: 8731 [2020-07-21 14:46:15,098 INFO L226 Difference]: Without dead ends: 5835 [2020-07-21 14:46:15,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5835 states. [2020-07-21 14:46:15,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5835 to 2962. [2020-07-21 14:46:15,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2962 states. [2020-07-21 14:46:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 4574 transitions. [2020-07-21 14:46:15,290 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 4574 transitions. Word has length 321 [2020-07-21 14:46:15,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:15,291 INFO L479 AbstractCegarLoop]: Abstraction has 2962 states and 4574 transitions. [2020-07-21 14:46:15,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:15,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 4574 transitions. [2020-07-21 14:46:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 14:46:15,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:15,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:15,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:15,516 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:15,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2005807933, now seen corresponding path program 1 times [2020-07-21 14:46:15,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:15,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496334690] [2020-07-21 14:46:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:15,841 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:15,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:15,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:46:15,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:16,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:16,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496334690] [2020-07-21 14:46:16,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:16,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:16,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420874439] [2020-07-21 14:46:16,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:16,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:16,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:16,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:16,033 INFO L87 Difference]: Start difference. First operand 2962 states and 4574 transitions. Second operand 4 states. [2020-07-21 14:46:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:16,295 INFO L93 Difference]: Finished difference Result 6280 states and 9720 transitions. [2020-07-21 14:46:16,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:46:16,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-07-21 14:46:16,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:16,312 INFO L225 Difference]: With dead ends: 6280 [2020-07-21 14:46:16,313 INFO L226 Difference]: Without dead ends: 3335 [2020-07-21 14:46:16,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:46:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2020-07-21 14:46:16,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3029. [2020-07-21 14:46:16,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3029 states. [2020-07-21 14:46:16,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 4681 transitions. [2020-07-21 14:46:16,463 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 4681 transitions. Word has length 322 [2020-07-21 14:46:16,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:16,463 INFO L479 AbstractCegarLoop]: Abstraction has 3029 states and 4681 transitions. [2020-07-21 14:46:16,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:16,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 4681 transitions. [2020-07-21 14:46:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 14:46:16,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:16,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:16,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:16,688 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:16,688 INFO L82 PathProgramCache]: Analyzing trace with hash 801297039, now seen corresponding path program 1 times [2020-07-21 14:46:16,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:16,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027275885] [2020-07-21 14:46:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:16,980 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:16,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:16,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:16,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:17,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:17,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027275885] [2020-07-21 14:46:17,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:17,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:17,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235824887] [2020-07-21 14:46:17,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:17,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:17,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:17,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:17,133 INFO L87 Difference]: Start difference. First operand 3029 states and 4681 transitions. Second operand 3 states. [2020-07-21 14:46:17,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:17,392 INFO L93 Difference]: Finished difference Result 9055 states and 13994 transitions. [2020-07-21 14:46:17,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:17,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-21 14:46:17,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:17,423 INFO L225 Difference]: With dead ends: 9055 [2020-07-21 14:46:17,424 INFO L226 Difference]: Without dead ends: 6041 [2020-07-21 14:46:17,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:17,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6041 states. [2020-07-21 14:46:17,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6041 to 3040. [2020-07-21 14:46:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3040 states. [2020-07-21 14:46:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 4697 transitions. [2020-07-21 14:46:17,637 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 4697 transitions. Word has length 324 [2020-07-21 14:46:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:17,638 INFO L479 AbstractCegarLoop]: Abstraction has 3040 states and 4697 transitions. [2020-07-21 14:46:17,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:17,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 4697 transitions. [2020-07-21 14:46:17,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-07-21 14:46:17,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:17,648 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] [2020-07-21 14:46:17,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:17,862 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:17,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:17,863 INFO L82 PathProgramCache]: Analyzing trace with hash -272307127, now seen corresponding path program 1 times [2020-07-21 14:46:17,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:17,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583965714] [2020-07-21 14:46:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:18,173 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:18,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:18,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:18,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:18,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:18,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583965714] [2020-07-21 14:46:18,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:18,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:18,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146345938] [2020-07-21 14:46:18,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:18,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:18,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:18,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:18,301 INFO L87 Difference]: Start difference. First operand 3040 states and 4697 transitions. Second operand 3 states. [2020-07-21 14:46:18,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:18,542 INFO L93 Difference]: Finished difference Result 9057 states and 13995 transitions. [2020-07-21 14:46:18,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:18,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 325 [2020-07-21 14:46:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:18,560 INFO L225 Difference]: With dead ends: 9057 [2020-07-21 14:46:18,561 INFO L226 Difference]: Without dead ends: 6047 [2020-07-21 14:46:18,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:18,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6047 states. [2020-07-21 14:46:18,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6047 to 3050. [2020-07-21 14:46:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3050 states. [2020-07-21 14:46:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 4711 transitions. [2020-07-21 14:46:18,754 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 4711 transitions. Word has length 325 [2020-07-21 14:46:18,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:18,754 INFO L479 AbstractCegarLoop]: Abstraction has 3050 states and 4711 transitions. [2020-07-21 14:46:18,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:18,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 4711 transitions. [2020-07-21 14:46:18,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 14:46:18,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:18,763 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] [2020-07-21 14:46:18,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:18,978 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:18,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:18,978 INFO L82 PathProgramCache]: Analyzing trace with hash 913844863, now seen corresponding path program 1 times [2020-07-21 14:46:18,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:18,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887288270] [2020-07-21 14:46:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:19,279 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:19,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:19,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:46:19,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:19,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:19,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887288270] [2020-07-21 14:46:19,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:19,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 14:46:19,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826151983] [2020-07-21 14:46:19,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:46:19,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:19,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:46:19,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:46:19,479 INFO L87 Difference]: Start difference. First operand 3050 states and 4711 transitions. Second operand 9 states. [2020-07-21 14:46:25,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:25,759 INFO L93 Difference]: Finished difference Result 20973 states and 32665 transitions. [2020-07-21 14:46:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 14:46:25,759 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 326 [2020-07-21 14:46:25,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:25,815 INFO L225 Difference]: With dead ends: 20973 [2020-07-21 14:46:25,815 INFO L226 Difference]: Without dead ends: 20330 [2020-07-21 14:46:25,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 14:46:25,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20330 states. [2020-07-21 14:46:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20330 to 7594. [2020-07-21 14:46:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7594 states. [2020-07-21 14:46:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7594 states to 7594 states and 11801 transitions. [2020-07-21 14:46:26,412 INFO L78 Accepts]: Start accepts. Automaton has 7594 states and 11801 transitions. Word has length 326 [2020-07-21 14:46:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:26,413 INFO L479 AbstractCegarLoop]: Abstraction has 7594 states and 11801 transitions. [2020-07-21 14:46:26,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 14:46:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 7594 states and 11801 transitions. [2020-07-21 14:46:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 14:46:26,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:26,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:26,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:26,645 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:26,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:26,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1429445535, now seen corresponding path program 1 times [2020-07-21 14:46:26,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:26,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742988226] [2020-07-21 14:46:26,647 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:26,936 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:26,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:26,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:26,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:27,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:27,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742988226] [2020-07-21 14:46:27,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:27,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:27,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109866663] [2020-07-21 14:46:27,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:27,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:27,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:27,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:27,029 INFO L87 Difference]: Start difference. First operand 7594 states and 11801 transitions. Second operand 3 states. [2020-07-21 14:46:27,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:27,740 INFO L93 Difference]: Finished difference Result 17142 states and 26767 transitions. [2020-07-21 14:46:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:27,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 14:46:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:27,766 INFO L225 Difference]: With dead ends: 17142 [2020-07-21 14:46:27,766 INFO L226 Difference]: Without dead ends: 10304 [2020-07-21 14:46:27,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:27,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10304 states. [2020-07-21 14:46:28,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10304 to 9153. [2020-07-21 14:46:28,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9153 states. [2020-07-21 14:46:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9153 states to 9153 states and 14380 transitions. [2020-07-21 14:46:28,393 INFO L78 Accepts]: Start accepts. Automaton has 9153 states and 14380 transitions. Word has length 326 [2020-07-21 14:46:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:28,394 INFO L479 AbstractCegarLoop]: Abstraction has 9153 states and 14380 transitions. [2020-07-21 14:46:28,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:28,394 INFO L276 IsEmpty]: Start isEmpty. Operand 9153 states and 14380 transitions. [2020-07-21 14:46:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 14:46:28,409 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:28,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:28,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:28,624 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:28,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:28,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1100189364, now seen corresponding path program 1 times [2020-07-21 14:46:28,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:28,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020469316] [2020-07-21 14:46:28,626 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:29,021 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:29,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:29,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:46:29,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:29,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:29,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020469316] [2020-07-21 14:46:29,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:29,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 14:46:29,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858154492] [2020-07-21 14:46:29,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:46:29,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:29,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:46:29,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:46:29,192 INFO L87 Difference]: Start difference. First operand 9153 states and 14380 transitions. Second operand 9 states. [2020-07-21 14:46:37,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:37,650 INFO L93 Difference]: Finished difference Result 59261 states and 94198 transitions. [2020-07-21 14:46:37,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 14:46:37,651 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 326 [2020-07-21 14:46:37,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:37,755 INFO L225 Difference]: With dead ends: 59261 [2020-07-21 14:46:37,755 INFO L226 Difference]: Without dead ends: 56103 [2020-07-21 14:46:37,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 14:46:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56103 states. [2020-07-21 14:46:39,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56103 to 22313. [2020-07-21 14:46:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22313 states. [2020-07-21 14:46:39,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22313 states to 22313 states and 35400 transitions. [2020-07-21 14:46:39,577 INFO L78 Accepts]: Start accepts. Automaton has 22313 states and 35400 transitions. Word has length 326 [2020-07-21 14:46:39,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:39,577 INFO L479 AbstractCegarLoop]: Abstraction has 22313 states and 35400 transitions. [2020-07-21 14:46:39,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 14:46:39,577 INFO L276 IsEmpty]: Start isEmpty. Operand 22313 states and 35400 transitions. [2020-07-21 14:46:39,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 14:46:39,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:39,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:39,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:39,809 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:39,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash 855876891, now seen corresponding path program 1 times [2020-07-21 14:46:39,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:39,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849233023] [2020-07-21 14:46:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:40,109 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:40,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:40,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:40,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:40,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:40,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849233023] [2020-07-21 14:46:40,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:40,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:40,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518545880] [2020-07-21 14:46:40,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:40,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:40,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:40,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:40,196 INFO L87 Difference]: Start difference. First operand 22313 states and 35400 transitions. Second operand 3 states. [2020-07-21 14:46:42,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:42,059 INFO L93 Difference]: Finished difference Result 54030 states and 86334 transitions. [2020-07-21 14:46:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:42,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 14:46:42,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:42,110 INFO L225 Difference]: With dead ends: 54030 [2020-07-21 14:46:42,110 INFO L226 Difference]: Without dead ends: 32547 [2020-07-21 14:46:42,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32547 states. [2020-07-21 14:46:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32547 to 29949. [2020-07-21 14:46:44,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29949 states. [2020-07-21 14:46:44,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29949 states to 29949 states and 47882 transitions. [2020-07-21 14:46:44,740 INFO L78 Accepts]: Start accepts. Automaton has 29949 states and 47882 transitions. Word has length 326 [2020-07-21 14:46:44,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:44,741 INFO L479 AbstractCegarLoop]: Abstraction has 29949 states and 47882 transitions. [2020-07-21 14:46:44,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:44,741 INFO L276 IsEmpty]: Start isEmpty. Operand 29949 states and 47882 transitions. [2020-07-21 14:46:44,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 14:46:44,759 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:44,759 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:44,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:44,970 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:44,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:44,971 INFO L82 PathProgramCache]: Analyzing trace with hash 361031685, now seen corresponding path program 1 times [2020-07-21 14:46:44,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:44,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706807322] [2020-07-21 14:46:44,972 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:45,258 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:45,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:45,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:46:45,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:45,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:45,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706807322] [2020-07-21 14:46:45,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:45,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:45,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572728153] [2020-07-21 14:46:45,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:45,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:45,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:45,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:45,361 INFO L87 Difference]: Start difference. First operand 29949 states and 47882 transitions. Second operand 4 states. [2020-07-21 14:46:48,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:48,418 INFO L93 Difference]: Finished difference Result 88882 states and 142091 transitions. [2020-07-21 14:46:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:46:48,419 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-21 14:46:48,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:48,530 INFO L225 Difference]: With dead ends: 88882 [2020-07-21 14:46:48,530 INFO L226 Difference]: Without dead ends: 59121 [2020-07-21 14:46:48,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:46:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59121 states. [2020-07-21 14:46:53,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59121 to 59119. [2020-07-21 14:46:53,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59119 states. [2020-07-21 14:46:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59119 states to 59119 states and 94186 transitions. [2020-07-21 14:46:53,366 INFO L78 Accepts]: Start accepts. Automaton has 59119 states and 94186 transitions. Word has length 326 [2020-07-21 14:46:53,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:53,366 INFO L479 AbstractCegarLoop]: Abstraction has 59119 states and 94186 transitions. [2020-07-21 14:46:53,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:53,366 INFO L276 IsEmpty]: Start isEmpty. Operand 59119 states and 94186 transitions. [2020-07-21 14:46:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 14:46:53,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:53,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:53,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:53,597 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:53,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1476341930, now seen corresponding path program 1 times [2020-07-21 14:46:53,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:53,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289748777] [2020-07-21 14:46:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:53,893 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:53,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:53,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:46:53,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:54,028 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 14:46:54,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:54,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289748777] [2020-07-21 14:46:54,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:54,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:54,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081117643] [2020-07-21 14:46:54,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:54,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:54,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:54,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:54,031 INFO L87 Difference]: Start difference. First operand 59119 states and 94186 transitions. Second operand 4 states. [2020-07-21 14:47:00,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:00,607 INFO L93 Difference]: Finished difference Result 172855 states and 275057 transitions. [2020-07-21 14:47:00,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:47:00,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-07-21 14:47:00,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:00,773 INFO L225 Difference]: With dead ends: 172855 [2020-07-21 14:47:00,774 INFO L226 Difference]: Without dead ends: 113939 [2020-07-21 14:47:00,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:47:00,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113939 states. [2020-07-21 14:47:09,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113939 to 113937. [2020-07-21 14:47:09,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113937 states. [2020-07-21 14:47:09,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113937 states to 113937 states and 180203 transitions. [2020-07-21 14:47:09,256 INFO L78 Accepts]: Start accepts. Automaton has 113937 states and 180203 transitions. Word has length 327 [2020-07-21 14:47:09,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:09,257 INFO L479 AbstractCegarLoop]: Abstraction has 113937 states and 180203 transitions. [2020-07-21 14:47:09,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:47:09,257 INFO L276 IsEmpty]: Start isEmpty. Operand 113937 states and 180203 transitions. [2020-07-21 14:47:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 14:47:09,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:09,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:09,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:09,490 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:09,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:09,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1709311236, now seen corresponding path program 1 times [2020-07-21 14:47:09,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:09,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684116647] [2020-07-21 14:47:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:09,779 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:09,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:09,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:47:09,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:09,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:09,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684116647] [2020-07-21 14:47:09,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:09,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:47:09,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132194923] [2020-07-21 14:47:09,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:47:09,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:09,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:47:09,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:47:09,861 INFO L87 Difference]: Start difference. First operand 113937 states and 180203 transitions. Second operand 4 states. [2020-07-21 14:47:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:23,699 INFO L93 Difference]: Finished difference Result 334578 states and 529176 transitions. [2020-07-21 14:47:23,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:47:23,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-21 14:47:23,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:24,042 INFO L225 Difference]: With dead ends: 334578 [2020-07-21 14:47:24,043 INFO L226 Difference]: Without dead ends: 221739 [2020-07-21 14:47:24,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:47:24,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221739 states. [2020-07-21 14:47:35,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221739 to 114951. [2020-07-21 14:47:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114951 states. [2020-07-21 14:47:35,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114951 states to 114951 states and 181869 transitions. [2020-07-21 14:47:35,892 INFO L78 Accepts]: Start accepts. Automaton has 114951 states and 181869 transitions. Word has length 328 [2020-07-21 14:47:35,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:35,892 INFO L479 AbstractCegarLoop]: Abstraction has 114951 states and 181869 transitions. [2020-07-21 14:47:35,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:47:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 114951 states and 181869 transitions. [2020-07-21 14:47:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 14:47:35,934 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:35,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:36,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:36,148 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:36,149 INFO L82 PathProgramCache]: Analyzing trace with hash -149090069, now seen corresponding path program 1 times [2020-07-21 14:47:36,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:36,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833993415] [2020-07-21 14:47:36,150 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:36,449 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:36,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:36,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:47:36,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:36,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:36,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833993415] [2020-07-21 14:47:36,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:36,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:47:36,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177090389] [2020-07-21 14:47:36,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:47:36,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:36,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:47:36,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:47:36,539 INFO L87 Difference]: Start difference. First operand 114951 states and 181869 transitions. Second operand 4 states. [2020-07-21 14:47:50,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:50,451 INFO L93 Difference]: Finished difference Result 336488 states and 532322 transitions. [2020-07-21 14:47:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:47:50,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 14:47:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:50,769 INFO L225 Difference]: With dead ends: 336488 [2020-07-21 14:47:50,770 INFO L226 Difference]: Without dead ends: 223477 [2020-07-21 14:47:50,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:47:51,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223477 states. [2020-07-21 14:48:02,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223477 to 116711. [2020-07-21 14:48:02,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116711 states. [2020-07-21 14:48:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116711 states to 116711 states and 184751 transitions. [2020-07-21 14:48:02,440 INFO L78 Accepts]: Start accepts. Automaton has 116711 states and 184751 transitions. Word has length 330 [2020-07-21 14:48:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:02,440 INFO L479 AbstractCegarLoop]: Abstraction has 116711 states and 184751 transitions. [2020-07-21 14:48:02,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:48:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 116711 states and 184751 transitions. [2020-07-21 14:48:02,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 14:48:02,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:02,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:02,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:02,674 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:02,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:02,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1780156129, now seen corresponding path program 1 times [2020-07-21 14:48:02,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:02,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929667437] [2020-07-21 14:48:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:02,980 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:02,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:02,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:48:02,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:03,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:03,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929667437] [2020-07-21 14:48:03,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:03,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:48:03,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199345450] [2020-07-21 14:48:03,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:48:03,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:03,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:48:03,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:03,052 INFO L87 Difference]: Start difference. First operand 116711 states and 184751 transitions. Second operand 3 states. [2020-07-21 14:48:21,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:21,014 INFO L93 Difference]: Finished difference Result 342655 states and 541794 transitions. [2020-07-21 14:48:21,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:48:21,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 14:48:21,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:21,567 INFO L225 Difference]: With dead ends: 342655 [2020-07-21 14:48:21,567 INFO L226 Difference]: Without dead ends: 229720 [2020-07-21 14:48:21,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:21,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229720 states. [2020-07-21 14:48:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229720 to 117073. [2020-07-21 14:48:30,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117073 states. [2020-07-21 14:48:30,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117073 states to 117073 states and 185193 transitions. [2020-07-21 14:48:30,911 INFO L78 Accepts]: Start accepts. Automaton has 117073 states and 185193 transitions. Word has length 332 [2020-07-21 14:48:30,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:30,911 INFO L479 AbstractCegarLoop]: Abstraction has 117073 states and 185193 transitions. [2020-07-21 14:48:30,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:48:30,911 INFO L276 IsEmpty]: Start isEmpty. Operand 117073 states and 185193 transitions. [2020-07-21 14:48:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 14:48:30,945 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:30,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:31,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:31,159 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:31,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:31,160 INFO L82 PathProgramCache]: Analyzing trace with hash -967512547, now seen corresponding path program 1 times [2020-07-21 14:48:31,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:31,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577020032] [2020-07-21 14:48:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:31,459 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:31,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:31,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:48:31,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:31,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:31,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577020032] [2020-07-21 14:48:31,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:31,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:48:31,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054797124] [2020-07-21 14:48:31,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:48:31,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:31,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:48:31,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:48:31,574 INFO L87 Difference]: Start difference. First operand 117073 states and 185193 transitions. Second operand 4 states. [2020-07-21 14:48:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:49,951 INFO L93 Difference]: Finished difference Result 336723 states and 532550 transitions. [2020-07-21 14:48:49,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:48:49,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 14:48:49,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:50,272 INFO L225 Difference]: With dead ends: 336723 [2020-07-21 14:48:50,272 INFO L226 Difference]: Without dead ends: 223472 [2020-07-21 14:48:50,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:48:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223472 states. [2020-07-21 14:49:00,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223472 to 118872. [2020-07-21 14:49:00,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118872 states. [2020-07-21 14:49:00,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118872 states to 118872 states and 188191 transitions. [2020-07-21 14:49:00,759 INFO L78 Accepts]: Start accepts. Automaton has 118872 states and 188191 transitions. Word has length 334 [2020-07-21 14:49:00,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:49:00,759 INFO L479 AbstractCegarLoop]: Abstraction has 118872 states and 188191 transitions. [2020-07-21 14:49:00,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:49:00,759 INFO L276 IsEmpty]: Start isEmpty. Operand 118872 states and 188191 transitions. [2020-07-21 14:49:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 14:49:00,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:49:00,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:49:00,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:00,996 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:49:00,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:49:00,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1966909775, now seen corresponding path program 1 times [2020-07-21 14:49:00,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:49:00,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507006997] [2020-07-21 14:49:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:01,424 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:49:01,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:49:01,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:49:01,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:49:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:49:01,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:49:01,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507006997] [2020-07-21 14:49:01,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:49:01,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:49:01,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990091707] [2020-07-21 14:49:01,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:49:01,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:49:01,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:49:01,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:01,570 INFO L87 Difference]: Start difference. First operand 118872 states and 188191 transitions. Second operand 3 states. [2020-07-21 14:49:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:49:18,585 INFO L93 Difference]: Finished difference Result 276906 states and 443793 transitions. [2020-07-21 14:49:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:49:18,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 14:49:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:49:18,966 INFO L225 Difference]: With dead ends: 276906 [2020-07-21 14:49:18,966 INFO L226 Difference]: Without dead ends: 197493 [2020-07-21 14:49:19,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:19,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197493 states. [2020-07-21 14:49:39,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197493 to 197491. [2020-07-21 14:49:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197491 states. [2020-07-21 14:49:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197491 states to 197491 states and 313473 transitions. [2020-07-21 14:49:39,691 INFO L78 Accepts]: Start accepts. Automaton has 197491 states and 313473 transitions. Word has length 334 [2020-07-21 14:49:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:49:39,691 INFO L479 AbstractCegarLoop]: Abstraction has 197491 states and 313473 transitions. [2020-07-21 14:49:39,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:49:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand 197491 states and 313473 transitions. [2020-07-21 14:49:39,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 14:49:39,735 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:49:39,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:49:39,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:39,936 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:49:39,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:49:39,937 INFO L82 PathProgramCache]: Analyzing trace with hash 822079952, now seen corresponding path program 1 times [2020-07-21 14:49:39,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:49:39,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703416179] [2020-07-21 14:49:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:40,359 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:49:40,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:49:40,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 2076 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:49:40,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:49:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:49:40,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:49:40,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703416179] [2020-07-21 14:49:40,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:49:40,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:49:40,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69566193] [2020-07-21 14:49:40,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:49:40,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:49:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:49:40,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:40,471 INFO L87 Difference]: Start difference. First operand 197491 states and 313473 transitions. Second operand 3 states. [2020-07-21 14:50:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:50:16,987 INFO L93 Difference]: Finished difference Result 542303 states and 865349 transitions. [2020-07-21 14:50:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:50:16,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 14:50:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:50:17,644 INFO L225 Difference]: With dead ends: 542303 [2020-07-21 14:50:17,644 INFO L226 Difference]: Without dead ends: 382071 [2020-07-21 14:50:17,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:50:18,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382071 states. [2020-07-21 14:50:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382071 to 381284. [2020-07-21 14:50:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381284 states. [2020-07-21 14:50:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381284 states to 381284 states and 605396 transitions. [2020-07-21 14:50:57,723 INFO L78 Accepts]: Start accepts. Automaton has 381284 states and 605396 transitions. Word has length 334 [2020-07-21 14:50:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:50:57,723 INFO L479 AbstractCegarLoop]: Abstraction has 381284 states and 605396 transitions. [2020-07-21 14:50:57,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:50:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand 381284 states and 605396 transitions. [2020-07-21 14:50:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 14:50:57,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:50:57,800 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] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (20)] Forcibly destroying the process [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (20)] Rare case: The thread was killed right after we checked if it was killed and before we wanted to kill it manually [2020-07-21 14:50:58,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:50:58,451 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:50:58,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:50:58,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1197911770, now seen corresponding path program 1 times [2020-07-21 14:50:58,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:50:58,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207532362] [2020-07-21 14:50:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:50:58,863 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:50:58,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:50:58,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 2076 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:50:58,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:50:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:50:58,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:50:58,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207532362] [2020-07-21 14:50:58,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:50:58,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:50:58,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023282699] [2020-07-21 14:50:58,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:50:58,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:50:58,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:50:58,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:50:58,950 INFO L87 Difference]: Start difference. First operand 381284 states and 605396 transitions. Second operand 3 states. [2020-07-21 14:52:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:52:14,176 INFO L93 Difference]: Finished difference Result 1061516 states and 1693726 transitions. [2020-07-21 14:52:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:52:14,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 14:52:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:52:15,460 INFO L225 Difference]: With dead ends: 1061516 [2020-07-21 14:52:15,460 INFO L226 Difference]: Without dead ends: 742783 [2020-07-21 14:52:15,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:52:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742783 states. [2020-07-21 14:53:40,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742783 to 742269. [2020-07-21 14:53:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742269 states. [2020-07-21 14:53:42,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742269 states to 742269 states and 1178619 transitions. [2020-07-21 14:53:42,514 INFO L78 Accepts]: Start accepts. Automaton has 742269 states and 1178619 transitions. Word has length 334 [2020-07-21 14:53:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:53:42,515 INFO L479 AbstractCegarLoop]: Abstraction has 742269 states and 1178619 transitions. [2020-07-21 14:53:42,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:53:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 742269 states and 1178619 transitions. [2020-07-21 14:53:42,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 14:53:42,667 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:53:42,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:53:42,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:53:42,868 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:53:42,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:53:42,869 INFO L82 PathProgramCache]: Analyzing trace with hash -408751932, now seen corresponding path program 1 times [2020-07-21 14:53:42,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:53:42,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505001715] [2020-07-21 14:53:42,870 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:53:43,289 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:53:43,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:53:43,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:53:43,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:53:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:53:43,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:53:43,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505001715] [2020-07-21 14:53:43,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:53:43,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:53:43,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326225759] [2020-07-21 14:53:43,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:53:43,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:53:43,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:53:43,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:53:43,395 INFO L87 Difference]: Start difference. First operand 742269 states and 1178619 transitions. Second operand 3 states. [2020-07-21 14:56:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:56:17,599 INFO L93 Difference]: Finished difference Result 2091969 states and 3338213 transitions. [2020-07-21 14:56:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:56:17,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 14:56:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:56:20,450 INFO L225 Difference]: With dead ends: 2091969 [2020-07-21 14:56:20,451 INFO L226 Difference]: Without dead ends: 1470473 [2020-07-21 14:56:21,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:56:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470473 states.