/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 15:12:22,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 15:12:22,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 15:12:22,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 15:12:22,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 15:12:22,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 15:12:22,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 15:12:22,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 15:12:22,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 15:12:22,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 15:12:22,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 15:12:22,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 15:12:22,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 15:12:22,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 15:12:22,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 15:12:22,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 15:12:22,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 15:12:22,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 15:12:22,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 15:12:22,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 15:12:22,802 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 15:12:22,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 15:12:22,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 15:12:22,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 15:12:22,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 15:12:22,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 15:12:22,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 15:12:22,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 15:12:22,825 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 [2020-07-20 15:12:22,839 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 15:12:22,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 15:12:22,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 15:12:22,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 15:12:22,841 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 15:12:22,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 15:12:22,841 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 15:12:22,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 15:12:22,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 15:12:22,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 15:12:22,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 15:12:22,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 15:12:22,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 15:12:22,842 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 15:12:22,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 15:12:22,843 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 15:12:22,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 15:12:22,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 15:12:22,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 15:12:22,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 15:12:22,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 15:12:22,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:12:22,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 15:12:22,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 15:12:22,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 15:12:22,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 15:12:22,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:22,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 15:12:22,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 15:12:22,845 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 -> 4 [2020-07-20 15:12:23,131 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 15:12:23,144 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 15:12:23,147 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 15:12:23,149 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 15:12:23,149 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 15:12:23,150 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-20 15:12:23,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7c9e922c/e793cada9aae4c079f73501a327f8528/FLAG62764d7f0 [2020-07-20 15:12:23,995 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 15:12:23,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-20 15:12:24,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7c9e922c/e793cada9aae4c079f73501a327f8528/FLAG62764d7f0 [2020-07-20 15:12:24,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7c9e922c/e793cada9aae4c079f73501a327f8528 [2020-07-20 15:12:24,083 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 15:12:24,085 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 15:12:24,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 15:12:24,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 15:12:24,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 15:12:24,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:12:24" (1/1) ... [2020-07-20 15:12:24,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@abf79bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:12:24, skipping insertion in model container [2020-07-20 15:12:24,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:12:24" (1/1) ... [2020-07-20 15:12:24,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 15:12:24,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 15:12:26,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:12:26,902 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 15:12:28,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:12:28,720 INFO L208 MainTranslator]: Completed translation [2020-07-20 15:12:28,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:12:28 WrapperNode [2020-07-20 15:12:28,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 15:12:28,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 15:12:28,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 15:12:28,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 15:12:28,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:12:28" (1/1) ... [2020-07-20 15:12:28,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:12:28" (1/1) ... [2020-07-20 15:12:28,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:12:28" (1/1) ... [2020-07-20 15:12:28,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:12:28" (1/1) ... [2020-07-20 15:12:28,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:12:28" (1/1) ... [2020-07-20 15:12:29,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:12:28" (1/1) ... [2020-07-20 15:12:29,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:12:28" (1/1) ... [2020-07-20 15:12:29,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 15:12:29,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 15:12:29,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 15:12:29,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 15:12:29,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:12:28" (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 [2020-07-20 15:12:29,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 15:12:29,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 15:12:29,249 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 15:12:29,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 15:12:29,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 15:12:29,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 15:12:29,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 15:12:29,251 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 15:12:29,252 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 15:12:29,252 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 15:12:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 15:12:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 15:12:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 15:12:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 15:12:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 15:12:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 15:12:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 15:12:29,256 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 15:12:29,256 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 15:12:29,257 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 15:12:29,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 15:12:29,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 15:12:36,198 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 15:12:36,198 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 15:12:36,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:12:36 BoogieIcfgContainer [2020-07-20 15:12:36,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 15:12:36,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 15:12:36,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 15:12:36,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 15:12:36,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:12:24" (1/3) ... [2020-07-20 15:12:36,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243d633c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:12:36, skipping insertion in model container [2020-07-20 15:12:36,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:12:28" (2/3) ... [2020-07-20 15:12:36,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243d633c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:12:36, skipping insertion in model container [2020-07-20 15:12:36,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:12:36" (3/3) ... [2020-07-20 15:12:36,228 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-20 15:12:36,238 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 15:12:36,251 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 15:12:36,266 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 15:12:36,307 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 15:12:36,307 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 15:12:36,307 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 15:12:36,308 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 15:12:36,308 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 15:12:36,308 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 15:12:36,308 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 15:12:36,308 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 15:12:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states. [2020-07-20 15:12:36,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-20 15:12:36,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:36,426 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] [2020-07-20 15:12:36,426 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:36,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1936618047, now seen corresponding path program 1 times [2020-07-20 15:12:36,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:36,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893537305] [2020-07-20 15:12:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:37,109 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:12:37,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:37,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 15:12:37,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:37,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:37,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893537305] [2020-07-20 15:12:37,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:37,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:12:37,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841287210] [2020-07-20 15:12:37,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:12:37,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:37,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:12:37,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:12:37,308 INFO L87 Difference]: Start difference. First operand 2515 states. Second operand 4 states. [2020-07-20 15:12:37,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:37,641 INFO L93 Difference]: Finished difference Result 4047 states and 7028 transitions. [2020-07-20 15:12:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:12:37,643 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-07-20 15:12:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:37,683 INFO L225 Difference]: With dead ends: 4047 [2020-07-20 15:12:37,684 INFO L226 Difference]: Without dead ends: 2511 [2020-07-20 15:12:37,700 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 [2020-07-20 15:12:37,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-20 15:12:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-20 15:12:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-20 15:12:37,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4372 transitions. [2020-07-20 15:12:37,893 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4372 transitions. Word has length 322 [2020-07-20 15:12:37,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:37,894 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4372 transitions. [2020-07-20 15:12:37,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:12:37,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4372 transitions. [2020-07-20 15:12:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 15:12:37,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:37,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:38,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:38,120 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:38,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:38,121 INFO L82 PathProgramCache]: Analyzing trace with hash 237230463, now seen corresponding path program 1 times [2020-07-20 15:12:38,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:38,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345941540] [2020-07-20 15:12:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:38,708 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:12:38,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:38,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1675 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 15:12:38,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:38,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:38,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345941540] [2020-07-20 15:12:38,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:38,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:12:38,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189753647] [2020-07-20 15:12:38,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:12:38,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:38,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:12:38,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:12:38,831 INFO L87 Difference]: Start difference. First operand 2511 states and 4372 transitions. Second operand 4 states. [2020-07-20 15:12:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:38,932 INFO L93 Difference]: Finished difference Result 3386 states and 5863 transitions. [2020-07-20 15:12:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:12:38,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-07-20 15:12:38,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:38,947 INFO L225 Difference]: With dead ends: 3386 [2020-07-20 15:12:38,948 INFO L226 Difference]: Without dead ends: 2511 [2020-07-20 15:12:38,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:12:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-20 15:12:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-20 15:12:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-20 15:12:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4362 transitions. [2020-07-20 15:12:39,039 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4362 transitions. Word has length 331 [2020-07-20 15:12:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:39,045 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4362 transitions. [2020-07-20 15:12:39,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:12:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4362 transitions. [2020-07-20 15:12:39,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 15:12:39,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:39,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:39,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:39,274 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:39,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1472996600, now seen corresponding path program 1 times [2020-07-20 15:12:39,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:39,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988120590] [2020-07-20 15:12:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:39,750 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:12:39,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:39,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1681 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 15:12:39,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:39,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:39,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988120590] [2020-07-20 15:12:39,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:39,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:12:39,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379445601] [2020-07-20 15:12:39,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:12:39,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:39,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:12:39,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:12:39,919 INFO L87 Difference]: Start difference. First operand 2511 states and 4362 transitions. Second operand 4 states. [2020-07-20 15:12:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:40,017 INFO L93 Difference]: Finished difference Result 2952 states and 5111 transitions. [2020-07-20 15:12:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:12:40,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-20 15:12:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:40,033 INFO L225 Difference]: With dead ends: 2952 [2020-07-20 15:12:40,033 INFO L226 Difference]: Without dead ends: 2511 [2020-07-20 15:12:40,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:12:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-20 15:12:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-20 15:12:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-20 15:12:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4352 transitions. [2020-07-20 15:12:40,104 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4352 transitions. Word has length 340 [2020-07-20 15:12:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:40,104 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4352 transitions. [2020-07-20 15:12:40,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:12:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4352 transitions. [2020-07-20 15:12:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-07-20 15:12:40,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:40,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:40,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:40,331 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:40,332 INFO L82 PathProgramCache]: Analyzing trace with hash 908469997, now seen corresponding path program 1 times [2020-07-20 15:12:40,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:40,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605154805] [2020-07-20 15:12:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:40,767 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:12:40,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 15:12:40,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:40,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:40,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605154805] [2020-07-20 15:12:40,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:40,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:12:40,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329389563] [2020-07-20 15:12:40,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:12:40,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:40,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:12:40,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:12:40,861 INFO L87 Difference]: Start difference. First operand 2511 states and 4352 transitions. Second operand 4 states. [2020-07-20 15:12:40,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:40,961 INFO L93 Difference]: Finished difference Result 3820 states and 6565 transitions. [2020-07-20 15:12:40,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:12:40,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 349 [2020-07-20 15:12:40,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:40,975 INFO L225 Difference]: With dead ends: 3820 [2020-07-20 15:12:40,975 INFO L226 Difference]: Without dead ends: 2511 [2020-07-20 15:12:40,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:12:40,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-20 15:12:41,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-20 15:12:41,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-20 15:12:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4342 transitions. [2020-07-20 15:12:41,096 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4342 transitions. Word has length 349 [2020-07-20 15:12:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:41,097 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4342 transitions. [2020-07-20 15:12:41,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:12:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4342 transitions. [2020-07-20 15:12:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-07-20 15:12:41,108 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:41,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:41,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:41,322 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:41,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:41,323 INFO L82 PathProgramCache]: Analyzing trace with hash 802636136, now seen corresponding path program 1 times [2020-07-20 15:12:41,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:41,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670654562] [2020-07-20 15:12:41,325 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:41,808 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:12:41,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:41,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1508 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 15:12:41,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:41,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:41,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670654562] [2020-07-20 15:12:41,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:41,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:12:41,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055836821] [2020-07-20 15:12:41,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:12:41,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:41,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:12:41,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:12:41,905 INFO L87 Difference]: Start difference. First operand 2511 states and 4342 transitions. Second operand 4 states. [2020-07-20 15:12:41,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:41,987 INFO L93 Difference]: Finished difference Result 3169 states and 5452 transitions. [2020-07-20 15:12:41,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:12:41,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 358 [2020-07-20 15:12:41,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:42,000 INFO L225 Difference]: With dead ends: 3169 [2020-07-20 15:12:42,000 INFO L226 Difference]: Without dead ends: 2511 [2020-07-20 15:12:42,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:12:42,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-20 15:12:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-20 15:12:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-20 15:12:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4332 transitions. [2020-07-20 15:12:42,067 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4332 transitions. Word has length 358 [2020-07-20 15:12:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:42,068 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4332 transitions. [2020-07-20 15:12:42,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:12:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4332 transitions. [2020-07-20 15:12:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-07-20 15:12:42,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:42,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:42,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:42,290 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:42,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:42,290 INFO L82 PathProgramCache]: Analyzing trace with hash -634938202, now seen corresponding path program 1 times [2020-07-20 15:12:42,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:42,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581814691] [2020-07-20 15:12:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:42,767 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:12:42,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:42,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 15:12:42,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:42,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:42,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581814691] [2020-07-20 15:12:42,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:42,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:12:42,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056927548] [2020-07-20 15:12:42,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:12:42,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:42,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:12:42,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:12:42,971 INFO L87 Difference]: Start difference. First operand 2511 states and 4332 transitions. Second operand 4 states. [2020-07-20 15:12:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:43,053 INFO L93 Difference]: Finished difference Result 3603 states and 6164 transitions. [2020-07-20 15:12:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:12:43,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 367 [2020-07-20 15:12:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:43,066 INFO L225 Difference]: With dead ends: 3603 [2020-07-20 15:12:43,067 INFO L226 Difference]: Without dead ends: 2511 [2020-07-20 15:12:43,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:12:43,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-20 15:12:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-20 15:12:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-20 15:12:43,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4322 transitions. [2020-07-20 15:12:43,127 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4322 transitions. Word has length 367 [2020-07-20 15:12:43,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:43,128 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4322 transitions. [2020-07-20 15:12:43,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:12:43,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4322 transitions. [2020-07-20 15:12:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-07-20 15:12:43,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:43,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:43,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:43,350 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:43,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:43,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1247670332, now seen corresponding path program 1 times [2020-07-20 15:12:43,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:43,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091129996] [2020-07-20 15:12:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:43,838 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:12:43,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:43,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 15:12:43,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:43,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:43,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091129996] [2020-07-20 15:12:43,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:43,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:12:43,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847185517] [2020-07-20 15:12:43,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:12:43,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:43,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:12:43,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:12:43,933 INFO L87 Difference]: Start difference. First operand 2511 states and 4322 transitions. Second operand 4 states. [2020-07-20 15:12:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:44,020 INFO L93 Difference]: Finished difference Result 4254 states and 7237 transitions. [2020-07-20 15:12:44,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:12:44,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 376 [2020-07-20 15:12:44,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:44,035 INFO L225 Difference]: With dead ends: 4254 [2020-07-20 15:12:44,035 INFO L226 Difference]: Without dead ends: 2511 [2020-07-20 15:12:44,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:12:44,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-20 15:12:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-20 15:12:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-20 15:12:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4312 transitions. [2020-07-20 15:12:44,091 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4312 transitions. Word has length 376 [2020-07-20 15:12:44,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:44,092 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4312 transitions. [2020-07-20 15:12:44,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:12:44,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4312 transitions. [2020-07-20 15:12:44,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-07-20 15:12:44,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:44,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:44,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:44,315 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:44,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:44,315 INFO L82 PathProgramCache]: Analyzing trace with hash 303208653, now seen corresponding path program 1 times [2020-07-20 15:12:44,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:44,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672011858] [2020-07-20 15:12:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:44,834 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:12:44,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:44,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:44,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:45,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:45,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672011858] [2020-07-20 15:12:45,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:45,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:12:45,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462970323] [2020-07-20 15:12:45,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:12:45,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:45,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:12:45,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:45,111 INFO L87 Difference]: Start difference. First operand 2511 states and 4312 transitions. Second operand 3 states. [2020-07-20 15:12:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:45,465 INFO L93 Difference]: Finished difference Result 4087 states and 6968 transitions. [2020-07-20 15:12:45,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:12:45,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 385 [2020-07-20 15:12:45,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:45,485 INFO L225 Difference]: With dead ends: 4087 [2020-07-20 15:12:45,485 INFO L226 Difference]: Without dead ends: 3863 [2020-07-20 15:12:45,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:45,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3863 states. [2020-07-20 15:12:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3863 to 2881. [2020-07-20 15:12:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2881 states. [2020-07-20 15:12:45,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 4936 transitions. [2020-07-20 15:12:45,568 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 4936 transitions. Word has length 385 [2020-07-20 15:12:45,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:45,569 INFO L479 AbstractCegarLoop]: Abstraction has 2881 states and 4936 transitions. [2020-07-20 15:12:45,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:12:45,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 4936 transitions. [2020-07-20 15:12:45,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-07-20 15:12:45,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:45,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:45,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:45,791 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:45,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:45,791 INFO L82 PathProgramCache]: Analyzing trace with hash -98615583, now seen corresponding path program 1 times [2020-07-20 15:12:45,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:45,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747338334] [2020-07-20 15:12:45,792 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:46,303 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:12:46,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:46,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:46,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:46,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:46,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747338334] [2020-07-20 15:12:46,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:46,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:12:46,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604720373] [2020-07-20 15:12:46,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:12:46,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:46,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:12:46,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:46,508 INFO L87 Difference]: Start difference. First operand 2881 states and 4936 transitions. Second operand 3 states. [2020-07-20 15:12:46,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:46,774 INFO L93 Difference]: Finished difference Result 5000 states and 8504 transitions. [2020-07-20 15:12:46,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:12:46,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 386 [2020-07-20 15:12:46,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:46,817 INFO L225 Difference]: With dead ends: 5000 [2020-07-20 15:12:46,817 INFO L226 Difference]: Without dead ends: 4571 [2020-07-20 15:12:46,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2020-07-20 15:12:46,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 3581. [2020-07-20 15:12:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3581 states. [2020-07-20 15:12:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 6116 transitions. [2020-07-20 15:12:46,923 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 6116 transitions. Word has length 386 [2020-07-20 15:12:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:46,924 INFO L479 AbstractCegarLoop]: Abstraction has 3581 states and 6116 transitions. [2020-07-20 15:12:46,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:12:46,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 6116 transitions. [2020-07-20 15:12:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2020-07-20 15:12:46,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:46,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:47,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:47,147 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:47,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:47,147 INFO L82 PathProgramCache]: Analyzing trace with hash 334293012, now seen corresponding path program 1 times [2020-07-20 15:12:47,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:47,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18066536] [2020-07-20 15:12:47,148 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:47,655 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:12:47,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:47,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:47,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:47,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:47,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18066536] [2020-07-20 15:12:47,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:47,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:12:47,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839245963] [2020-07-20 15:12:47,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:12:47,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:47,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:12:47,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:47,844 INFO L87 Difference]: Start difference. First operand 3581 states and 6116 transitions. Second operand 3 states. [2020-07-20 15:12:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:48,116 INFO L93 Difference]: Finished difference Result 6457 states and 10952 transitions. [2020-07-20 15:12:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:12:48,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 387 [2020-07-20 15:12:48,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:48,130 INFO L225 Difference]: With dead ends: 6457 [2020-07-20 15:12:48,130 INFO L226 Difference]: Without dead ends: 5619 [2020-07-20 15:12:48,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:48,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2020-07-20 15:12:48,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 4861. [2020-07-20 15:12:48,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4861 states. [2020-07-20 15:12:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4861 states to 4861 states and 8272 transitions. [2020-07-20 15:12:48,262 INFO L78 Accepts]: Start accepts. Automaton has 4861 states and 8272 transitions. Word has length 387 [2020-07-20 15:12:48,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:48,263 INFO L479 AbstractCegarLoop]: Abstraction has 4861 states and 8272 transitions. [2020-07-20 15:12:48,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:12:48,264 INFO L276 IsEmpty]: Start isEmpty. Operand 4861 states and 8272 transitions. [2020-07-20 15:12:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2020-07-20 15:12:48,273 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:48,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:48,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:48,489 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:48,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:48,490 INFO L82 PathProgramCache]: Analyzing trace with hash 874115592, now seen corresponding path program 1 times [2020-07-20 15:12:48,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:48,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10831119] [2020-07-20 15:12:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:49,034 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:12:49,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:49,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:49,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:49,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:49,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10831119] [2020-07-20 15:12:49,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:49,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:12:49,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311467997] [2020-07-20 15:12:49,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:12:49,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:49,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:12:49,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:49,229 INFO L87 Difference]: Start difference. First operand 4861 states and 8272 transitions. Second operand 3 states. [2020-07-20 15:12:49,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:49,665 INFO L93 Difference]: Finished difference Result 9322 states and 15768 transitions. [2020-07-20 15:12:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:12:49,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 388 [2020-07-20 15:12:49,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:49,690 INFO L225 Difference]: With dead ends: 9322 [2020-07-20 15:12:49,690 INFO L226 Difference]: Without dead ends: 7667 [2020-07-20 15:12:49,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7667 states. [2020-07-20 15:12:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7667 to 7139. [2020-07-20 15:12:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7139 states. [2020-07-20 15:12:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7139 states to 7139 states and 12104 transitions. [2020-07-20 15:12:49,972 INFO L78 Accepts]: Start accepts. Automaton has 7139 states and 12104 transitions. Word has length 388 [2020-07-20 15:12:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:49,973 INFO L479 AbstractCegarLoop]: Abstraction has 7139 states and 12104 transitions. [2020-07-20 15:12:49,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:12:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 7139 states and 12104 transitions. [2020-07-20 15:12:49,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-07-20 15:12:49,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:49,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:50,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:50,201 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:50,201 INFO L82 PathProgramCache]: Analyzing trace with hash 433304411, now seen corresponding path program 1 times [2020-07-20 15:12:50,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:50,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443749232] [2020-07-20 15:12:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:50,690 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:12:50,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:50,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 1714 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:50,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:50,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:50,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443749232] [2020-07-20 15:12:50,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:50,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:12:50,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176350249] [2020-07-20 15:12:50,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:12:50,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:50,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:12:50,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:50,924 INFO L87 Difference]: Start difference. First operand 7139 states and 12104 transitions. Second operand 3 states. [2020-07-20 15:12:51,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:51,309 INFO L93 Difference]: Finished difference Result 14677 states and 24764 transitions. [2020-07-20 15:12:51,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:12:51,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 389 [2020-07-20 15:12:51,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:51,336 INFO L225 Difference]: With dead ends: 14677 [2020-07-20 15:12:51,337 INFO L226 Difference]: Without dead ends: 11391 [2020-07-20 15:12:51,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11391 states. [2020-07-20 15:12:51,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11391 to 11089. [2020-07-20 15:12:51,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11089 states. [2020-07-20 15:12:51,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11089 states to 11089 states and 18736 transitions. [2020-07-20 15:12:51,635 INFO L78 Accepts]: Start accepts. Automaton has 11089 states and 18736 transitions. Word has length 389 [2020-07-20 15:12:51,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:51,636 INFO L479 AbstractCegarLoop]: Abstraction has 11089 states and 18736 transitions. [2020-07-20 15:12:51,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:12:51,636 INFO L276 IsEmpty]: Start isEmpty. Operand 11089 states and 18736 transitions. [2020-07-20 15:12:51,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-07-20 15:12:51,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:51,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:51,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:51,858 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:51,859 INFO L82 PathProgramCache]: Analyzing trace with hash -342382289, now seen corresponding path program 1 times [2020-07-20 15:12:51,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:51,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117906636] [2020-07-20 15:12:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:52,387 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:12:52,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:52,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1714 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:52,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:52,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:52,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117906636] [2020-07-20 15:12:52,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:52,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:12:52,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317234355] [2020-07-20 15:12:52,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:12:52,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:52,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:12:52,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:52,629 INFO L87 Difference]: Start difference. First operand 11089 states and 18736 transitions. Second operand 3 states. [2020-07-20 15:12:53,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:53,202 INFO L93 Difference]: Finished difference Result 24194 states and 40730 transitions. [2020-07-20 15:12:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:12:53,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 390 [2020-07-20 15:12:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:53,254 INFO L225 Difference]: With dead ends: 24194 [2020-07-20 15:12:53,254 INFO L226 Difference]: Without dead ends: 17653 [2020-07-20 15:12:53,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:53,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17653 states. [2020-07-20 15:12:53,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17653 to 17570. [2020-07-20 15:12:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17570 states. [2020-07-20 15:12:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17570 states to 17570 states and 29588 transitions. [2020-07-20 15:12:53,812 INFO L78 Accepts]: Start accepts. Automaton has 17570 states and 29588 transitions. Word has length 390 [2020-07-20 15:12:53,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:53,815 INFO L479 AbstractCegarLoop]: Abstraction has 17570 states and 29588 transitions. [2020-07-20 15:12:53,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:12:53,815 INFO L276 IsEmpty]: Start isEmpty. Operand 17570 states and 29588 transitions. [2020-07-20 15:12:53,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-07-20 15:12:53,823 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:53,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:54,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:54,037 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:54,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:54,037 INFO L82 PathProgramCache]: Analyzing trace with hash 83965051, now seen corresponding path program 1 times [2020-07-20 15:12:54,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:54,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107372577] [2020-07-20 15:12:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:54,557 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:12:54,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:54,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 1719 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 15:12:54,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:54,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:54,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107372577] [2020-07-20 15:12:54,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:54,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:12:54,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584959439] [2020-07-20 15:12:54,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:12:54,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:54,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:12:54,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:12:54,669 INFO L87 Difference]: Start difference. First operand 17570 states and 29588 transitions. Second operand 4 states. [2020-07-20 15:12:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:55,812 INFO L93 Difference]: Finished difference Result 34589 states and 58140 transitions. [2020-07-20 15:12:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:12:55,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-07-20 15:12:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:55,850 INFO L225 Difference]: With dead ends: 34589 [2020-07-20 15:12:55,850 INFO L226 Difference]: Without dead ends: 17570 [2020-07-20 15:12:55,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:12:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17570 states. [2020-07-20 15:12:56,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17570 to 17570. [2020-07-20 15:12:56,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17570 states. [2020-07-20 15:12:56,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17570 states to 17570 states and 29523 transitions. [2020-07-20 15:12:56,351 INFO L78 Accepts]: Start accepts. Automaton has 17570 states and 29523 transitions. Word has length 391 [2020-07-20 15:12:56,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:56,352 INFO L479 AbstractCegarLoop]: Abstraction has 17570 states and 29523 transitions. [2020-07-20 15:12:56,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:12:56,352 INFO L276 IsEmpty]: Start isEmpty. Operand 17570 states and 29523 transitions. [2020-07-20 15:12:56,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2020-07-20 15:12:56,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:56,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:56,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:56,578 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:56,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:56,579 INFO L82 PathProgramCache]: Analyzing trace with hash 197088704, now seen corresponding path program 1 times [2020-07-20 15:12:56,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:56,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376232801] [2020-07-20 15:12:56,580 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:57,268 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:12:57,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:57,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:57,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:57,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:57,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376232801] [2020-07-20 15:12:57,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:57,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:12:57,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118962701] [2020-07-20 15:12:57,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:12:57,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:57,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:12:57,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:57,551 INFO L87 Difference]: Start difference. First operand 17570 states and 29523 transitions. Second operand 3 states. [2020-07-20 15:12:58,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:58,388 INFO L93 Difference]: Finished difference Result 43194 states and 72420 transitions. [2020-07-20 15:12:58,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:12:58,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 455 [2020-07-20 15:12:58,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:58,432 INFO L225 Difference]: With dead ends: 43194 [2020-07-20 15:12:58,432 INFO L226 Difference]: Without dead ends: 26216 [2020-07-20 15:12:58,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:58,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26216 states. [2020-07-20 15:12:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26216 to 26212. [2020-07-20 15:12:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26212 states. [2020-07-20 15:12:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26212 states to 26212 states and 43860 transitions. [2020-07-20 15:12:59,122 INFO L78 Accepts]: Start accepts. Automaton has 26212 states and 43860 transitions. Word has length 455 [2020-07-20 15:12:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:59,122 INFO L479 AbstractCegarLoop]: Abstraction has 26212 states and 43860 transitions. [2020-07-20 15:12:59,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:12:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 26212 states and 43860 transitions. [2020-07-20 15:12:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-07-20 15:12:59,132 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:59,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:59,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:59,347 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:59,348 INFO L82 PathProgramCache]: Analyzing trace with hash 993047596, now seen corresponding path program 1 times [2020-07-20 15:12:59,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:59,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505208584] [2020-07-20 15:12:59,349 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:59,905 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:12:59,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:59,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1760 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:59,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:13:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:13:00,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:13:00,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505208584] [2020-07-20 15:13:00,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:13:00,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:13:00,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615059689] [2020-07-20 15:13:00,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:13:00,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:13:00,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:13:00,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:13:00,207 INFO L87 Difference]: Start difference. First operand 26212 states and 43860 transitions. Second operand 3 states. [2020-07-20 15:13:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:13:00,863 INFO L93 Difference]: Finished difference Result 55598 states and 93125 transitions. [2020-07-20 15:13:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:13:00,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 460 [2020-07-20 15:13:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:13:00,929 INFO L225 Difference]: With dead ends: 55598 [2020-07-20 15:13:00,929 INFO L226 Difference]: Without dead ends: 38609 [2020-07-20 15:13:00,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:13:00,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38609 states. [2020-07-20 15:13:02,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38609 to 38605. [2020-07-20 15:13:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38605 states. [2020-07-20 15:13:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38605 states to 38605 states and 64549 transitions. [2020-07-20 15:13:02,789 INFO L78 Accepts]: Start accepts. Automaton has 38605 states and 64549 transitions. Word has length 460 [2020-07-20 15:13:02,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:13:02,789 INFO L479 AbstractCegarLoop]: Abstraction has 38605 states and 64549 transitions. [2020-07-20 15:13:02,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:13:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 38605 states and 64549 transitions. [2020-07-20 15:13:02,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-07-20 15:13:02,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:13:02,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:13:03,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:13:03,006 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:13:03,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:13:03,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1478281099, now seen corresponding path program 1 times [2020-07-20 15:13:03,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:13:03,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361034994] [2020-07-20 15:13:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:13:03,520 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:13:03,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:13:03,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 1768 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:13:03,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:13:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:13:03,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:13:03,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361034994] [2020-07-20 15:13:03,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:13:03,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:13:03,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608495183] [2020-07-20 15:13:03,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:13:03,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:13:03,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:13:03,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:13:03,730 INFO L87 Difference]: Start difference. First operand 38605 states and 64549 transitions. Second operand 4 states. [2020-07-20 15:13:05,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:13:05,559 INFO L93 Difference]: Finished difference Result 115062 states and 192370 transitions. [2020-07-20 15:13:05,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:13:05,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 466 [2020-07-20 15:13:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:13:05,655 INFO L225 Difference]: With dead ends: 115062 [2020-07-20 15:13:05,655 INFO L226 Difference]: Without dead ends: 76474 [2020-07-20 15:13:05,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:13:05,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76474 states. [2020-07-20 15:13:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76474 to 76470. [2020-07-20 15:13:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76470 states. [2020-07-20 15:13:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76470 states to 76470 states and 127546 transitions. [2020-07-20 15:13:07,609 INFO L78 Accepts]: Start accepts. Automaton has 76470 states and 127546 transitions. Word has length 466 [2020-07-20 15:13:07,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:13:07,609 INFO L479 AbstractCegarLoop]: Abstraction has 76470 states and 127546 transitions. [2020-07-20 15:13:07,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:13:07,610 INFO L276 IsEmpty]: Start isEmpty. Operand 76470 states and 127546 transitions. [2020-07-20 15:13:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-20 15:13:07,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:13:07,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:13:07,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:13:07,827 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:13:07,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:13:07,828 INFO L82 PathProgramCache]: Analyzing trace with hash 2039729531, now seen corresponding path program 1 times [2020-07-20 15:13:07,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:13:07,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303596670] [2020-07-20 15:13:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:13:09,978 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:13:09,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:13:09,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1768 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:13:09,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:13:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:13:10,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:13:10,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303596670] [2020-07-20 15:13:10,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:13:10,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:13:10,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908442313] [2020-07-20 15:13:10,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:13:10,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:13:10,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:13:10,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:13:10,116 INFO L87 Difference]: Start difference. First operand 76470 states and 127546 transitions. Second operand 3 states. [2020-07-20 15:13:12,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:13:12,384 INFO L93 Difference]: Finished difference Result 179514 states and 299906 transitions. [2020-07-20 15:13:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:13:12,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2020-07-20 15:13:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:13:12,541 INFO L225 Difference]: With dead ends: 179514 [2020-07-20 15:13:12,541 INFO L226 Difference]: Without dead ends: 104153 [2020-07-20 15:13:12,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:13:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104153 states. [2020-07-20 15:13:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104153 to 102925. [2020-07-20 15:13:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102925 states. [2020-07-20 15:13:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102925 states to 102925 states and 171227 transitions. [2020-07-20 15:13:15,167 INFO L78 Accepts]: Start accepts. Automaton has 102925 states and 171227 transitions. Word has length 467 [2020-07-20 15:13:15,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:13:15,168 INFO L479 AbstractCegarLoop]: Abstraction has 102925 states and 171227 transitions. [2020-07-20 15:13:15,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:13:15,168 INFO L276 IsEmpty]: Start isEmpty. Operand 102925 states and 171227 transitions. [2020-07-20 15:13:15,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-20 15:13:15,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:13:15,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:13:15,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:13:15,384 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:13:15,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:13:15,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1901437192, now seen corresponding path program 1 times [2020-07-20 15:13:15,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:13:15,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197345992] [2020-07-20 15:13:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:13:15,901 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:13:15,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:13:15,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 1768 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:13:15,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:13:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:13:17,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:13:17,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197345992] [2020-07-20 15:13:17,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:13:17,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:13:17,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124677617] [2020-07-20 15:13:17,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:13:17,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:13:17,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:13:17,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:13:17,985 INFO L87 Difference]: Start difference. First operand 102925 states and 171227 transitions. Second operand 4 states. [2020-07-20 15:13:22,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:13:22,970 INFO L93 Difference]: Finished difference Result 306994 states and 510784 transitions. [2020-07-20 15:13:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:13:22,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2020-07-20 15:13:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:13:23,242 INFO L225 Difference]: With dead ends: 306994 [2020-07-20 15:13:23,243 INFO L226 Difference]: Without dead ends: 204087 [2020-07-20 15:13:23,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:13:23,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204087 states. [2020-07-20 15:13:31,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204087 to 204083. [2020-07-20 15:13:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204083 states. [2020-07-20 15:13:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204083 states to 204083 states and 338688 transitions. [2020-07-20 15:13:31,605 INFO L78 Accepts]: Start accepts. Automaton has 204083 states and 338688 transitions. Word has length 468 [2020-07-20 15:13:31,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:13:31,606 INFO L479 AbstractCegarLoop]: Abstraction has 204083 states and 338688 transitions. [2020-07-20 15:13:31,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:13:31,606 INFO L276 IsEmpty]: Start isEmpty. Operand 204083 states and 338688 transitions. [2020-07-20 15:13:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-20 15:13:31,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:13:31,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:13:31,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:13:31,848 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:13:31,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:13:31,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1589754939, now seen corresponding path program 1 times [2020-07-20 15:13:31,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:13:31,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925984017] [2020-07-20 15:13:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:13:32,335 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:13:32,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:13:32,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:13:32,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:13:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:13:32,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:13:32,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925984017] [2020-07-20 15:13:32,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:13:32,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:13:32,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64199043] [2020-07-20 15:13:32,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:13:32,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:13:32,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:13:32,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:13:32,440 INFO L87 Difference]: Start difference. First operand 204083 states and 338688 transitions. Second operand 3 states. [2020-07-20 15:13:45,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:13:45,841 INFO L93 Difference]: Finished difference Result 612159 states and 1015914 transitions. [2020-07-20 15:13:45,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:13:45,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 472 [2020-07-20 15:13:45,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:13:46,438 INFO L225 Difference]: With dead ends: 612159 [2020-07-20 15:13:46,439 INFO L226 Difference]: Without dead ends: 408117 [2020-07-20 15:13:46,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:13:46,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408117 states. [2020-07-20 15:13:59,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408117 to 204124. [2020-07-20 15:13:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204124 states. [2020-07-20 15:13:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204124 states to 204124 states and 338747 transitions. [2020-07-20 15:13:59,507 INFO L78 Accepts]: Start accepts. Automaton has 204124 states and 338747 transitions. Word has length 472 [2020-07-20 15:13:59,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:13:59,507 INFO L479 AbstractCegarLoop]: Abstraction has 204124 states and 338747 transitions. [2020-07-20 15:13:59,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:13:59,507 INFO L276 IsEmpty]: Start isEmpty. Operand 204124 states and 338747 transitions. [2020-07-20 15:14:00,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-20 15:14:00,108 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:14:00,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:14:00,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:14:00,320 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:14:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:14:00,321 INFO L82 PathProgramCache]: Analyzing trace with hash 968286262, now seen corresponding path program 1 times [2020-07-20 15:14:00,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:14:00,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115117733] [2020-07-20 15:14:00,322 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:14:00,876 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:14:00,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:14:00,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1771 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:14:00,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:14:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:14:01,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:14:01,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115117733] [2020-07-20 15:14:01,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:14:01,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:14:01,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370096319] [2020-07-20 15:14:01,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:14:01,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:14:01,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:14:01,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:14:01,083 INFO L87 Difference]: Start difference. First operand 204124 states and 338747 transitions. Second operand 4 states. [2020-07-20 15:14:19,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:14:19,263 INFO L93 Difference]: Finished difference Result 606750 states and 1007105 transitions. [2020-07-20 15:14:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:14:19,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 472 [2020-07-20 15:14:19,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:14:19,849 INFO L225 Difference]: With dead ends: 606750 [2020-07-20 15:14:19,849 INFO L226 Difference]: Without dead ends: 402805 [2020-07-20 15:14:20,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:14:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402805 states. [2020-07-20 15:14:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402805 to 402801. [2020-07-20 15:14:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402801 states. [2020-07-20 15:14:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402801 states to 402801 states and 667330 transitions. [2020-07-20 15:14:41,974 INFO L78 Accepts]: Start accepts. Automaton has 402801 states and 667330 transitions. Word has length 472 [2020-07-20 15:14:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:14:41,975 INFO L479 AbstractCegarLoop]: Abstraction has 402801 states and 667330 transitions. [2020-07-20 15:14:41,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:14:41,975 INFO L276 IsEmpty]: Start isEmpty. Operand 402801 states and 667330 transitions. [2020-07-20 15:14:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 15:14:42,045 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:14:42,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:14:42,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:14:42,261 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:14:42,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:14:42,262 INFO L82 PathProgramCache]: Analyzing trace with hash -104696538, now seen corresponding path program 1 times [2020-07-20 15:14:42,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:14:42,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463219112] [2020-07-20 15:14:42,263 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:14:42,803 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:14:42,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:14:42,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:14:42,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:14:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:14:43,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:14:43,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463219112] [2020-07-20 15:14:43,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:14:43,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:14:43,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977104877] [2020-07-20 15:14:43,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:14:43,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:14:43,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:14:43,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:14:43,742 INFO L87 Difference]: Start difference. First operand 402801 states and 667330 transitions. Second operand 4 states. [2020-07-20 15:15:26,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:15:26,095 INFO L93 Difference]: Finished difference Result 1196869 states and 1983236 transitions. [2020-07-20 15:15:26,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:15:26,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-20 15:15:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:15:27,711 INFO L225 Difference]: With dead ends: 1196869 [2020-07-20 15:15:27,711 INFO L226 Difference]: Without dead ends: 794419 [2020-07-20 15:15:28,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:15:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794419 states. [2020-07-20 15:16:19,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794419 to 794415. [2020-07-20 15:16:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794415 states. [2020-07-20 15:16:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794415 states to 794415 states and 1313778 transitions. [2020-07-20 15:16:21,245 INFO L78 Accepts]: Start accepts. Automaton has 794415 states and 1313778 transitions. Word has length 473 [2020-07-20 15:16:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:16:21,246 INFO L479 AbstractCegarLoop]: Abstraction has 794415 states and 1313778 transitions. [2020-07-20 15:16:21,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:16:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 794415 states and 1313778 transitions. [2020-07-20 15:16:21,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-20 15:16:21,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:16:21,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:16:21,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:16:21,550 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:16:21,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:16:21,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1719576552, now seen corresponding path program 1 times [2020-07-20 15:16:21,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:16:21,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658924956] [2020-07-20 15:16:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:16:22,093 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:16:22,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:16:22,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:16:22,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:16:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:16:22,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:16:22,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658924956] [2020-07-20 15:16:22,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:16:22,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:16:22,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178858563] [2020-07-20 15:16:22,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:16:22,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:16:22,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:16:22,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:16:22,286 INFO L87 Difference]: Start difference. First operand 794415 states and 1313778 transitions. Second operand 4 states. [2020-07-20 15:18:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:18:01,895 INFO L93 Difference]: Finished difference Result 2368859 states and 3917786 transitions. [2020-07-20 15:18:01,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:18:01,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 474 [2020-07-20 15:18:01,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:18:05,425 INFO L225 Difference]: With dead ends: 2368859 [2020-07-20 15:18:05,425 INFO L226 Difference]: Without dead ends: 1574491 [2020-07-20 15:18:06,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:18:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574491 states.