/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.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 15:08:18,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 15:08:18,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 15:08:18,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 15:08:18,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 15:08:18,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 15:08:18,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 15:08:18,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 15:08:18,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 15:08:18,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 15:08:18,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 15:08:18,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 15:08:18,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 15:08:18,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 15:08:18,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 15:08:18,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 15:08:18,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 15:08:18,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 15:08:18,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 15:08:18,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 15:08:18,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 15:08:18,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 15:08:18,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 15:08:18,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 15:08:18,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 15:08:18,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 15:08:18,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 15:08:18,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 15:08:18,238 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 15:08:18,253 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 15:08:18,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 15:08:18,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 15:08:18,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 15:08:18,255 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 15:08:18,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 15:08:18,255 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 15:08:18,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 15:08:18,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 15:08:18,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 15:08:18,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 15:08:18,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 15:08:18,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 15:08:18,257 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 15:08:18,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 15:08:18,257 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 15:08:18,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 15:08:18,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 15:08:18,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 15:08:18,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 15:08:18,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 15:08:18,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:08:18,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 15:08:18,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 15:08:18,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 15:08:18,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 15:08:18,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:18,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 15:08:18,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 15:08:18,260 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 15:08:18,547 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 15:08:18,564 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 15:08:18,569 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 15:08:18,570 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 15:08:18,571 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 15:08:18,571 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 15:08:18,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53dc604e6/adb5d217d4e64cd3a4db893fbfacf98d/FLAGb06ca009d [2020-07-20 15:08:19,242 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 15:08:19,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 15:08:19,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53dc604e6/adb5d217d4e64cd3a4db893fbfacf98d/FLAGb06ca009d [2020-07-20 15:08:19,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53dc604e6/adb5d217d4e64cd3a4db893fbfacf98d [2020-07-20 15:08:19,467 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 15:08:19,470 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 15:08:19,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 15:08:19,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 15:08:19,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 15:08:19,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:08:19" (1/1) ... [2020-07-20 15:08:19,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@170325f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:08:19, skipping insertion in model container [2020-07-20 15:08:19,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:08:19" (1/1) ... [2020-07-20 15:08:19,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 15:08:19,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 15:08:20,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:08:20,623 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 15:08:21,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:08:21,518 INFO L208 MainTranslator]: Completed translation [2020-07-20 15:08:21,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:08:21 WrapperNode [2020-07-20 15:08:21,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 15:08:21,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 15:08:21,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 15:08:21,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 15:08:21,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:08:21" (1/1) ... [2020-07-20 15:08:21,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:08:21" (1/1) ... [2020-07-20 15:08:21,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:08:21" (1/1) ... [2020-07-20 15:08:21,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:08:21" (1/1) ... [2020-07-20 15:08:21,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:08:21" (1/1) ... [2020-07-20 15:08:21,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:08:21" (1/1) ... [2020-07-20 15:08:21,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:08:21" (1/1) ... [2020-07-20 15:08:21,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 15:08:21,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 15:08:21,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 15:08:21,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 15:08:21,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:08:21" (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 15:08:21,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 15:08:21,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 15:08:21,797 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 15:08:21,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 15:08:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 15:08:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 15:08:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 15:08:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 15:08:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 15:08:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 15:08:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 15:08:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 15:08:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 15:08:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 15:08:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 15:08:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 15:08:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 15:08:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 15:08:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 15:08:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 15:08:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 15:08:24,142 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 15:08:24,142 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 15:08:24,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:08:24 BoogieIcfgContainer [2020-07-20 15:08:24,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 15:08:24,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 15:08:24,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 15:08:24,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 15:08:24,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:08:19" (1/3) ... [2020-07-20 15:08:24,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce6e179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:08:24, skipping insertion in model container [2020-07-20 15:08:24,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:08:21" (2/3) ... [2020-07-20 15:08:24,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce6e179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:08:24, skipping insertion in model container [2020-07-20 15:08:24,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:08:24" (3/3) ... [2020-07-20 15:08:24,162 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 15:08:24,175 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 15:08:24,190 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 15:08:24,204 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 15:08:24,249 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 15:08:24,250 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 15:08:24,250 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 15:08:24,250 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 15:08:24,250 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 15:08:24,250 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 15:08:24,250 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 15:08:24,251 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 15:08:24,291 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-20 15:08:24,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 15:08:24,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:24,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:24,338 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:24,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:24,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-20 15:08:24,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:24,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808087101] [2020-07-20 15:08:24,355 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 15:08:24,866 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:08:24,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:24,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 15:08:24,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:25,286 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 15:08:25,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:25,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808087101] [2020-07-20 15:08:25,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:25,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:08:25,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348512991] [2020-07-20 15:08:25,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:08:25,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:25,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:08:25,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:08:25,314 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-20 15:08:25,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:25,598 INFO L93 Difference]: Finished difference Result 2303 states and 4091 transitions. [2020-07-20 15:08:25,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:08:25,600 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-20 15:08:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:25,629 INFO L225 Difference]: With dead ends: 2303 [2020-07-20 15:08:25,629 INFO L226 Difference]: Without dead ends: 1535 [2020-07-20 15:08:25,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:08:25,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2020-07-20 15:08:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1533. [2020-07-20 15:08:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1533 states. [2020-07-20 15:08:25,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2382 transitions. [2020-07-20 15:08:25,769 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2382 transitions. Word has length 324 [2020-07-20 15:08:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:25,770 INFO L479 AbstractCegarLoop]: Abstraction has 1533 states and 2382 transitions. [2020-07-20 15:08:25,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:08:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2382 transitions. [2020-07-20 15:08:25,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 15:08:25,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:25,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:25,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:25,992 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:25,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:25,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1205549206, now seen corresponding path program 1 times [2020-07-20 15:08:25,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:25,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798298470] [2020-07-20 15:08:25,993 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 15:08:26,358 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:08:26,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:26,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:08:26,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:26,536 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 15:08:26,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:26,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798298470] [2020-07-20 15:08:26,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:26,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:08:26,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657174370] [2020-07-20 15:08:26,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:08:26,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:26,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:08:26,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:26,542 INFO L87 Difference]: Start difference. First operand 1533 states and 2382 transitions. Second operand 3 states. [2020-07-20 15:08:26,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:26,733 INFO L93 Difference]: Finished difference Result 4357 states and 6726 transitions. [2020-07-20 15:08:26,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:08:26,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 15:08:26,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:26,751 INFO L225 Difference]: With dead ends: 4357 [2020-07-20 15:08:26,752 INFO L226 Difference]: Without dead ends: 2965 [2020-07-20 15:08:26,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:26,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2020-07-20 15:08:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2963. [2020-07-20 15:08:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2963 states. [2020-07-20 15:08:26,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4570 transitions. [2020-07-20 15:08:26,921 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4570 transitions. Word has length 326 [2020-07-20 15:08:26,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:26,925 INFO L479 AbstractCegarLoop]: Abstraction has 2963 states and 4570 transitions. [2020-07-20 15:08:26,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:08:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4570 transitions. [2020-07-20 15:08:26,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 15:08:26,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:26,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:27,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:27,154 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:27,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:27,156 INFO L82 PathProgramCache]: Analyzing trace with hash 531559899, now seen corresponding path program 1 times [2020-07-20 15:08:27,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:27,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425633854] [2020-07-20 15:08:27,157 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 15:08:27,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:08:27,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:27,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:08:27,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:27,527 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 15:08:27,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:27,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425633854] [2020-07-20 15:08:27,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:27,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:08:27,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292584210] [2020-07-20 15:08:27,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:08:27,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:27,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:08:27,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:27,531 INFO L87 Difference]: Start difference. First operand 2963 states and 4570 transitions. Second operand 3 states. [2020-07-20 15:08:27,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:27,717 INFO L93 Difference]: Finished difference Result 8529 states and 13066 transitions. [2020-07-20 15:08:27,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:08:27,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 15:08:27,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:27,747 INFO L225 Difference]: With dead ends: 8529 [2020-07-20 15:08:27,747 INFO L226 Difference]: Without dead ends: 5745 [2020-07-20 15:08:27,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2020-07-20 15:08:27,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 2986. [2020-07-20 15:08:27,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2986 states. [2020-07-20 15:08:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 4602 transitions. [2020-07-20 15:08:27,908 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 4602 transitions. Word has length 326 [2020-07-20 15:08:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:27,908 INFO L479 AbstractCegarLoop]: Abstraction has 2986 states and 4602 transitions. [2020-07-20 15:08:27,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:08:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 4602 transitions. [2020-07-20 15:08:27,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 15:08:27,918 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:27,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:28,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:28,134 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:28,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:28,135 INFO L82 PathProgramCache]: Analyzing trace with hash 978171801, now seen corresponding path program 1 times [2020-07-20 15:08:28,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:28,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005432519] [2020-07-20 15:08:28,137 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 15:08:28,409 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:08:28,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:28,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:08:28,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:28,562 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 15:08:28,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:28,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005432519] [2020-07-20 15:08:28,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:28,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:08:28,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146228433] [2020-07-20 15:08:28,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:08:28,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:28,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:08:28,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:28,565 INFO L87 Difference]: Start difference. First operand 2986 states and 4602 transitions. Second operand 3 states. [2020-07-20 15:08:28,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:28,783 INFO L93 Difference]: Finished difference Result 8555 states and 13100 transitions. [2020-07-20 15:08:28,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:08:28,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-20 15:08:28,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:28,814 INFO L225 Difference]: With dead ends: 8555 [2020-07-20 15:08:28,814 INFO L226 Difference]: Without dead ends: 5777 [2020-07-20 15:08:28,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:28,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5777 states. [2020-07-20 15:08:28,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5777 to 3009. [2020-07-20 15:08:28,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3009 states. [2020-07-20 15:08:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 4634 transitions. [2020-07-20 15:08:28,991 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 4634 transitions. Word has length 327 [2020-07-20 15:08:28,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:28,992 INFO L479 AbstractCegarLoop]: Abstraction has 3009 states and 4634 transitions. [2020-07-20 15:08:28,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:08:28,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 4634 transitions. [2020-07-20 15:08:29,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 15:08:29,002 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:29,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:29,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:29,217 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:29,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:29,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1854224337, now seen corresponding path program 1 times [2020-07-20 15:08:29,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:29,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557116249] [2020-07-20 15:08:29,219 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 15:08:29,538 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:08:29,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:29,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:08:29,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:29,657 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 15:08:29,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:29,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557116249] [2020-07-20 15:08:29,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:29,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:08:29,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677122241] [2020-07-20 15:08:29,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:08:29,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:29,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:08:29,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:29,661 INFO L87 Difference]: Start difference. First operand 3009 states and 4634 transitions. Second operand 3 states. [2020-07-20 15:08:29,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:29,912 INFO L93 Difference]: Finished difference Result 8588 states and 13157 transitions. [2020-07-20 15:08:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:08:29,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 15:08:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:29,942 INFO L225 Difference]: With dead ends: 8588 [2020-07-20 15:08:29,944 INFO L226 Difference]: Without dead ends: 5854 [2020-07-20 15:08:29,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:29,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5854 states. [2020-07-20 15:08:30,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5854 to 5852. [2020-07-20 15:08:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5852 states. [2020-07-20 15:08:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5852 states to 5852 states and 8949 transitions. [2020-07-20 15:08:30,323 INFO L78 Accepts]: Start accepts. Automaton has 5852 states and 8949 transitions. Word has length 328 [2020-07-20 15:08:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:30,324 INFO L479 AbstractCegarLoop]: Abstraction has 5852 states and 8949 transitions. [2020-07-20 15:08:30,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:08:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5852 states and 8949 transitions. [2020-07-20 15:08:30,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 15:08:30,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:30,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:30,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:30,555 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:30,555 INFO L82 PathProgramCache]: Analyzing trace with hash 718367342, now seen corresponding path program 1 times [2020-07-20 15:08:30,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:30,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360960217] [2020-07-20 15:08:30,557 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 15:08:30,803 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:08:30,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:30,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:08:30,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:30,910 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 15:08:30,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:30,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360960217] [2020-07-20 15:08:30,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:30,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:08:30,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672097064] [2020-07-20 15:08:30,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:08:30,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:30,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:08:30,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:08:30,914 INFO L87 Difference]: Start difference. First operand 5852 states and 8949 transitions. Second operand 4 states. [2020-07-20 15:08:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:31,331 INFO L93 Difference]: Finished difference Result 15496 states and 23409 transitions. [2020-07-20 15:08:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:08:31,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-20 15:08:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:31,381 INFO L225 Difference]: With dead ends: 15496 [2020-07-20 15:08:31,382 INFO L226 Difference]: Without dead ends: 10558 [2020-07-20 15:08:31,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:08:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10558 states. [2020-07-20 15:08:31,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10558 to 6264. [2020-07-20 15:08:31,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6264 states. [2020-07-20 15:08:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6264 states to 6264 states and 9663 transitions. [2020-07-20 15:08:31,711 INFO L78 Accepts]: Start accepts. Automaton has 6264 states and 9663 transitions. Word has length 328 [2020-07-20 15:08:31,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:31,711 INFO L479 AbstractCegarLoop]: Abstraction has 6264 states and 9663 transitions. [2020-07-20 15:08:31,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:08:31,712 INFO L276 IsEmpty]: Start isEmpty. Operand 6264 states and 9663 transitions. [2020-07-20 15:08:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 15:08:31,732 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:31,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:31,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:31,946 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:31,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:31,946 INFO L82 PathProgramCache]: Analyzing trace with hash 49676490, now seen corresponding path program 1 times [2020-07-20 15:08:31,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:31,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525959135] [2020-07-20 15:08:31,947 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 15:08:32,210 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:08:32,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:32,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:08:32,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:32,304 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 15:08:32,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:32,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525959135] [2020-07-20 15:08:32,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:32,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:08:32,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127083340] [2020-07-20 15:08:32,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:08:32,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:32,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:08:32,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:32,307 INFO L87 Difference]: Start difference. First operand 6264 states and 9663 transitions. Second operand 3 states. [2020-07-20 15:08:32,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:32,721 INFO L93 Difference]: Finished difference Result 12028 states and 18569 transitions. [2020-07-20 15:08:32,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:08:32,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 15:08:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:32,741 INFO L225 Difference]: With dead ends: 12028 [2020-07-20 15:08:32,742 INFO L226 Difference]: Without dead ends: 8114 [2020-07-20 15:08:32,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:32,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8114 states. [2020-07-20 15:08:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8114 to 7248. [2020-07-20 15:08:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7248 states. [2020-07-20 15:08:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7248 states to 7248 states and 11271 transitions. [2020-07-20 15:08:33,046 INFO L78 Accepts]: Start accepts. Automaton has 7248 states and 11271 transitions. Word has length 330 [2020-07-20 15:08:33,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:33,046 INFO L479 AbstractCegarLoop]: Abstraction has 7248 states and 11271 transitions. [2020-07-20 15:08:33,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:08:33,046 INFO L276 IsEmpty]: Start isEmpty. Operand 7248 states and 11271 transitions. [2020-07-20 15:08:33,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 15:08:33,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:33,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:33,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:33,276 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:33,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:33,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1317355585, now seen corresponding path program 1 times [2020-07-20 15:08:33,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:33,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362492371] [2020-07-20 15:08:33,279 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 15:08:33,516 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:08:33,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:33,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:08:33,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:33,661 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 15:08:33,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:33,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362492371] [2020-07-20 15:08:33,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:33,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:08:33,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806588735] [2020-07-20 15:08:33,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:08:33,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:33,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:08:33,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:33,664 INFO L87 Difference]: Start difference. First operand 7248 states and 11271 transitions. Second operand 3 states. [2020-07-20 15:08:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:34,043 INFO L93 Difference]: Finished difference Result 19104 states and 29176 transitions. [2020-07-20 15:08:34,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:08:34,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 15:08:34,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:34,081 INFO L225 Difference]: With dead ends: 19104 [2020-07-20 15:08:34,081 INFO L226 Difference]: Without dead ends: 13172 [2020-07-20 15:08:34,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13172 states. [2020-07-20 15:08:34,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13172 to 7350. [2020-07-20 15:08:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7350 states. [2020-07-20 15:08:34,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7350 states to 7350 states and 11406 transitions. [2020-07-20 15:08:34,442 INFO L78 Accepts]: Start accepts. Automaton has 7350 states and 11406 transitions. Word has length 330 [2020-07-20 15:08:34,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:34,442 INFO L479 AbstractCegarLoop]: Abstraction has 7350 states and 11406 transitions. [2020-07-20 15:08:34,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:08:34,442 INFO L276 IsEmpty]: Start isEmpty. Operand 7350 states and 11406 transitions. [2020-07-20 15:08:34,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 15:08:34,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:34,460 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 15:08:34,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:34,675 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:34,675 INFO L82 PathProgramCache]: Analyzing trace with hash 370496760, now seen corresponding path program 1 times [2020-07-20 15:08:34,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:34,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605536202] [2020-07-20 15:08:34,676 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 15:08:34,921 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:08:34,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:34,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:08:34,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:35,115 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 15:08:35,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:35,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605536202] [2020-07-20 15:08:35,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:35,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:08:35,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495528348] [2020-07-20 15:08:35,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:08:35,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:35,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:08:35,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:08:35,118 INFO L87 Difference]: Start difference. First operand 7350 states and 11406 transitions. Second operand 4 states. [2020-07-20 15:08:35,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:35,509 INFO L93 Difference]: Finished difference Result 15512 states and 24046 transitions. [2020-07-20 15:08:35,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:08:35,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-07-20 15:08:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:35,532 INFO L225 Difference]: With dead ends: 15512 [2020-07-20 15:08:35,532 INFO L226 Difference]: Without dead ends: 8217 [2020-07-20 15:08:35,548 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 15:08:35,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8217 states. [2020-07-20 15:08:35,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8217 to 7368. [2020-07-20 15:08:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7368 states. [2020-07-20 15:08:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7368 states to 7368 states and 11429 transitions. [2020-07-20 15:08:35,926 INFO L78 Accepts]: Start accepts. Automaton has 7368 states and 11429 transitions. Word has length 331 [2020-07-20 15:08:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:35,927 INFO L479 AbstractCegarLoop]: Abstraction has 7368 states and 11429 transitions. [2020-07-20 15:08:35,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:08:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 7368 states and 11429 transitions. [2020-07-20 15:08:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 15:08:35,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:35,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:36,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:36,158 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:36,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:36,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1007891796, now seen corresponding path program 1 times [2020-07-20 15:08:36,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:36,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216948874] [2020-07-20 15:08:36,159 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 15:08:36,454 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:08:36,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:36,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:08:36,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:36,533 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 15:08:36,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:36,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216948874] [2020-07-20 15:08:36,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:36,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:08:36,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688576359] [2020-07-20 15:08:36,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:08:36,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:36,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:08:36,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:36,535 INFO L87 Difference]: Start difference. First operand 7368 states and 11429 transitions. Second operand 3 states. [2020-07-20 15:08:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:36,870 INFO L93 Difference]: Finished difference Result 21678 states and 33562 transitions. [2020-07-20 15:08:36,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:08:36,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-20 15:08:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:36,907 INFO L225 Difference]: With dead ends: 21678 [2020-07-20 15:08:36,907 INFO L226 Difference]: Without dead ends: 14529 [2020-07-20 15:08:36,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 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 15:08:36,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14529 states. [2020-07-20 15:08:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14529 to 7394. [2020-07-20 15:08:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7394 states. [2020-07-20 15:08:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 11461 transitions. [2020-07-20 15:08:37,489 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 11461 transitions. Word has length 333 [2020-07-20 15:08:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:37,490 INFO L479 AbstractCegarLoop]: Abstraction has 7394 states and 11461 transitions. [2020-07-20 15:08:37,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:08:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 11461 transitions. [2020-07-20 15:08:37,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 15:08:37,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:37,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:37,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:37,715 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:37,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:37,715 INFO L82 PathProgramCache]: Analyzing trace with hash -339070524, now seen corresponding path program 1 times [2020-07-20 15:08:37,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:37,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448969339] [2020-07-20 15:08:37,716 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 15:08:37,932 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:08:37,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:37,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:08:37,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:38,154 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 15:08:38,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:38,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448969339] [2020-07-20 15:08:38,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:38,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 15:08:38,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108903278] [2020-07-20 15:08:38,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 15:08:38,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:38,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 15:08:38,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 15:08:38,158 INFO L87 Difference]: Start difference. First operand 7394 states and 11461 transitions. Second operand 9 states. [2020-07-20 15:08:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:45,117 INFO L93 Difference]: Finished difference Result 52772 states and 83330 transitions. [2020-07-20 15:08:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 15:08:45,118 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 334 [2020-07-20 15:08:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:45,201 INFO L225 Difference]: With dead ends: 52772 [2020-07-20 15:08:45,201 INFO L226 Difference]: Without dead ends: 51024 [2020-07-20 15:08:45,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 15:08:45,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51024 states. [2020-07-20 15:08:47,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51024 to 18778. [2020-07-20 15:08:47,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18778 states. [2020-07-20 15:08:47,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18778 states to 18778 states and 29413 transitions. [2020-07-20 15:08:47,332 INFO L78 Accepts]: Start accepts. Automaton has 18778 states and 29413 transitions. Word has length 334 [2020-07-20 15:08:47,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:47,332 INFO L479 AbstractCegarLoop]: Abstraction has 18778 states and 29413 transitions. [2020-07-20 15:08:47,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 15:08:47,332 INFO L276 IsEmpty]: Start isEmpty. Operand 18778 states and 29413 transitions. [2020-07-20 15:08:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 15:08:47,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:47,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:47,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:47,564 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:47,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:47,565 INFO L82 PathProgramCache]: Analyzing trace with hash 2078306859, now seen corresponding path program 1 times [2020-07-20 15:08:47,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:47,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721713110] [2020-07-20 15:08:47,566 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 15:08:47,831 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:08:47,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:47,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:08:47,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:47,894 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 15:08:47,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:47,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721713110] [2020-07-20 15:08:47,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:47,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:08:47,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432042044] [2020-07-20 15:08:47,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:08:47,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:47,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:08:47,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:47,896 INFO L87 Difference]: Start difference. First operand 18778 states and 29413 transitions. Second operand 3 states. [2020-07-20 15:08:49,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:49,140 INFO L93 Difference]: Finished difference Result 44316 states and 69747 transitions. [2020-07-20 15:08:49,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:08:49,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-20 15:08:49,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:49,173 INFO L225 Difference]: With dead ends: 44316 [2020-07-20 15:08:49,174 INFO L226 Difference]: Without dead ends: 27570 [2020-07-20 15:08:49,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:49,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27570 states. [2020-07-20 15:08:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27570 to 23864. [2020-07-20 15:08:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23864 states. [2020-07-20 15:08:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23864 states to 23864 states and 37731 transitions. [2020-07-20 15:08:50,462 INFO L78 Accepts]: Start accepts. Automaton has 23864 states and 37731 transitions. Word has length 334 [2020-07-20 15:08:50,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:50,462 INFO L479 AbstractCegarLoop]: Abstraction has 23864 states and 37731 transitions. [2020-07-20 15:08:50,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:08:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 23864 states and 37731 transitions. [2020-07-20 15:08:50,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 15:08:50,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:50,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:50,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:50,697 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:50,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:50,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2069376045, now seen corresponding path program 1 times [2020-07-20 15:08:50,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:50,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132357590] [2020-07-20 15:08:50,699 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 15:08:50,929 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:08:50,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:50,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:08:50,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:50,992 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 15:08:50,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:50,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132357590] [2020-07-20 15:08:50,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:50,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:08:50,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491681412] [2020-07-20 15:08:50,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:08:50,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:50,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:08:50,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:08:50,995 INFO L87 Difference]: Start difference. First operand 23864 states and 37731 transitions. Second operand 4 states. [2020-07-20 15:08:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:52,919 INFO L93 Difference]: Finished difference Result 67948 states and 107251 transitions. [2020-07-20 15:08:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:08:52,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-20 15:08:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:52,976 INFO L225 Difference]: With dead ends: 67948 [2020-07-20 15:08:52,976 INFO L226 Difference]: Without dead ends: 44873 [2020-07-20 15:08:53,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:08:53,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44873 states. [2020-07-20 15:08:55,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44873 to 24285. [2020-07-20 15:08:55,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24285 states. [2020-07-20 15:08:55,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24285 states to 24285 states and 38424 transitions. [2020-07-20 15:08:55,207 INFO L78 Accepts]: Start accepts. Automaton has 24285 states and 38424 transitions. Word has length 334 [2020-07-20 15:08:55,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:55,208 INFO L479 AbstractCegarLoop]: Abstraction has 24285 states and 38424 transitions. [2020-07-20 15:08:55,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:08:55,208 INFO L276 IsEmpty]: Start isEmpty. Operand 24285 states and 38424 transitions. [2020-07-20 15:08:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 15:08:55,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:55,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:55,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:55,422 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:55,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:55,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1807304492, now seen corresponding path program 1 times [2020-07-20 15:08:55,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:55,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834418713] [2020-07-20 15:08:55,424 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 15:08:55,692 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:08:55,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:55,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:08:55,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:08:55,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:55,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834418713] [2020-07-20 15:08:55,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:55,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:08:55,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234618395] [2020-07-20 15:08:55,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:08:55,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:55,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:08:55,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:55,783 INFO L87 Difference]: Start difference. First operand 24285 states and 38424 transitions. Second operand 3 states. [2020-07-20 15:08:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:57,803 INFO L93 Difference]: Finished difference Result 61473 states and 98054 transitions. [2020-07-20 15:08:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:08:57,804 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-20 15:08:57,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:58,046 INFO L225 Difference]: With dead ends: 61473 [2020-07-20 15:08:58,046 INFO L226 Difference]: Without dead ends: 39789 [2020-07-20 15:08:58,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:08:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39789 states. [2020-07-20 15:09:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39789 to 34931. [2020-07-20 15:09:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34931 states. [2020-07-20 15:09:00,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34931 states to 34931 states and 55694 transitions. [2020-07-20 15:09:00,918 INFO L78 Accepts]: Start accepts. Automaton has 34931 states and 55694 transitions. Word has length 334 [2020-07-20 15:09:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:09:00,918 INFO L479 AbstractCegarLoop]: Abstraction has 34931 states and 55694 transitions. [2020-07-20 15:09:00,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:09:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 34931 states and 55694 transitions. [2020-07-20 15:09:00,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 15:09:00,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:09:00,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:09:01,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:09:01,136 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:09:01,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:09:01,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1489159867, now seen corresponding path program 1 times [2020-07-20 15:09:01,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:09:01,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937794359] [2020-07-20 15:09:01,138 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 15:09:01,405 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:09:01,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:09:01,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:09:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:09:01,474 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 15:09:01,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:09:01,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937794359] [2020-07-20 15:09:01,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:09:01,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:09:01,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882045214] [2020-07-20 15:09:01,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:09:01,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:09:01,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:09:01,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:09:01,476 INFO L87 Difference]: Start difference. First operand 34931 states and 55694 transitions. Second operand 3 states. [2020-07-20 15:09:04,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:09:04,743 INFO L93 Difference]: Finished difference Result 104234 states and 166139 transitions. [2020-07-20 15:09:04,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:09:04,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-20 15:09:04,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:09:04,821 INFO L225 Difference]: With dead ends: 104234 [2020-07-20 15:09:04,821 INFO L226 Difference]: Without dead ends: 69407 [2020-07-20 15:09:04,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:09:04,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69407 states. [2020-07-20 15:09:06,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69407 to 34962. [2020-07-20 15:09:06,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34962 states. [2020-07-20 15:09:07,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34962 states to 34962 states and 55732 transitions. [2020-07-20 15:09:07,037 INFO L78 Accepts]: Start accepts. Automaton has 34962 states and 55732 transitions. Word has length 336 [2020-07-20 15:09:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:09:07,037 INFO L479 AbstractCegarLoop]: Abstraction has 34962 states and 55732 transitions. [2020-07-20 15:09:07,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:09:07,038 INFO L276 IsEmpty]: Start isEmpty. Operand 34962 states and 55732 transitions. [2020-07-20 15:09:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 15:09:07,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:09:07,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:09:07,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:09:07,250 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:09:07,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:09:07,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1777609729, now seen corresponding path program 1 times [2020-07-20 15:09:07,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:09:07,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772747549] [2020-07-20 15:09:07,252 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 15:09:07,518 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:09:07,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:09:07,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:09:07,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:09:07,633 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 15:09:07,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:09:07,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772747549] [2020-07-20 15:09:07,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:09:07,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:09:07,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626779220] [2020-07-20 15:09:07,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:09:07,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:09:07,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:09:07,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:09:07,636 INFO L87 Difference]: Start difference. First operand 34962 states and 55732 transitions. Second operand 4 states. [2020-07-20 15:09:12,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:09:12,601 INFO L93 Difference]: Finished difference Result 103338 states and 164763 transitions. [2020-07-20 15:09:12,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:09:12,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-20 15:09:12,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:09:12,684 INFO L225 Difference]: With dead ends: 103338 [2020-07-20 15:09:12,685 INFO L226 Difference]: Without dead ends: 68397 [2020-07-20 15:09:12,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:09:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68397 states. [2020-07-20 15:09:16,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68397 to 68382. [2020-07-20 15:09:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68382 states. [2020-07-20 15:09:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68382 states to 68382 states and 108551 transitions. [2020-07-20 15:09:16,599 INFO L78 Accepts]: Start accepts. Automaton has 68382 states and 108551 transitions. Word has length 337 [2020-07-20 15:09:16,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:09:16,599 INFO L479 AbstractCegarLoop]: Abstraction has 68382 states and 108551 transitions. [2020-07-20 15:09:16,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:09:16,599 INFO L276 IsEmpty]: Start isEmpty. Operand 68382 states and 108551 transitions. [2020-07-20 15:09:16,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 15:09:16,623 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:09:16,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:09:16,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:09:16,837 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:09:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:09:16,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1523639380, now seen corresponding path program 1 times [2020-07-20 15:09:16,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:09:16,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815033567] [2020-07-20 15:09:16,839 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 15:09:17,098 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:09:17,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:09:17,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:09:17,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:09:17,485 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 15:09:17,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:09:17,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815033567] [2020-07-20 15:09:17,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:09:17,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:09:17,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998830828] [2020-07-20 15:09:17,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:09:17,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:09:17,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:09:17,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:09:17,494 INFO L87 Difference]: Start difference. First operand 68382 states and 108551 transitions. Second operand 3 states. [2020-07-20 15:09:26,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:09:26,072 INFO L93 Difference]: Finished difference Result 201515 states and 319932 transitions. [2020-07-20 15:09:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:09:26,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-20 15:09:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:09:26,282 INFO L225 Difference]: With dead ends: 201515 [2020-07-20 15:09:26,282 INFO L226 Difference]: Without dead ends: 133859 [2020-07-20 15:09:26,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:09:26,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133859 states. [2020-07-20 15:09:37,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133859 to 133857. [2020-07-20 15:09:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133857 states. [2020-07-20 15:09:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133857 states to 133857 states and 211405 transitions. [2020-07-20 15:09:37,264 INFO L78 Accepts]: Start accepts. Automaton has 133857 states and 211405 transitions. Word has length 339 [2020-07-20 15:09:37,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:09:37,264 INFO L479 AbstractCegarLoop]: Abstraction has 133857 states and 211405 transitions. [2020-07-20 15:09:37,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:09:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 133857 states and 211405 transitions. [2020-07-20 15:09:37,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 15:09:37,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:09:37,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:09:37,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:09:37,511 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:09:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:09:37,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1664696721, now seen corresponding path program 1 times [2020-07-20 15:09:37,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:09:37,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131633758] [2020-07-20 15:09:37,513 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 15:09:37,738 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:09:37,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:09:37,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:09:37,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:09:37,806 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 15:09:37,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:09:37,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131633758] [2020-07-20 15:09:37,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:09:37,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:09:37,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203362434] [2020-07-20 15:09:37,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:09:37,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:09:37,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:09:37,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:09:37,808 INFO L87 Difference]: Start difference. First operand 133857 states and 211405 transitions. Second operand 3 states. [2020-07-20 15:09:55,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:09:55,688 INFO L93 Difference]: Finished difference Result 401357 states and 633888 transitions. [2020-07-20 15:09:55,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:09:55,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-20 15:09:55,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:09:56,103 INFO L225 Difference]: With dead ends: 401357 [2020-07-20 15:09:56,104 INFO L226 Difference]: Without dead ends: 267515 [2020-07-20 15:09:56,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:09:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267515 states. [2020-07-20 15:10:06,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267515 to 133868. [2020-07-20 15:10:06,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133868 states. [2020-07-20 15:10:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133868 states to 133868 states and 211421 transitions. [2020-07-20 15:10:07,034 INFO L78 Accepts]: Start accepts. Automaton has 133868 states and 211421 transitions. Word has length 339 [2020-07-20 15:10:07,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:10:07,035 INFO L479 AbstractCegarLoop]: Abstraction has 133868 states and 211421 transitions. [2020-07-20 15:10:07,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:10:07,035 INFO L276 IsEmpty]: Start isEmpty. Operand 133868 states and 211421 transitions. [2020-07-20 15:10:07,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 15:10:07,071 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:10:07,071 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 15:10:07,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:10:07,272 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:10:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:10:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1154827915, now seen corresponding path program 1 times [2020-07-20 15:10:07,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:10:07,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847742848] [2020-07-20 15:10:07,274 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 15:10:07,544 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:10:07,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:10:07,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:10:07,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:10:07,620 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 15:10:07,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:10:07,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847742848] [2020-07-20 15:10:07,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:10:07,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:10:07,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710226114] [2020-07-20 15:10:07,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:10:07,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:10:07,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:10:07,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:10:07,622 INFO L87 Difference]: Start difference. First operand 133868 states and 211421 transitions. Second operand 3 states. [2020-07-20 15:10:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:10:26,984 INFO L93 Difference]: Finished difference Result 401171 states and 633555 transitions. [2020-07-20 15:10:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:10:26,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2020-07-20 15:10:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:10:27,338 INFO L225 Difference]: With dead ends: 401171 [2020-07-20 15:10:27,338 INFO L226 Difference]: Without dead ends: 267349 [2020-07-20 15:10:27,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:10:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267349 states. [2020-07-20 15:10:42,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267349 to 133878. [2020-07-20 15:10:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133878 states. [2020-07-20 15:10:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133878 states to 133878 states and 211434 transitions. [2020-07-20 15:10:42,753 INFO L78 Accepts]: Start accepts. Automaton has 133878 states and 211434 transitions. Word has length 340 [2020-07-20 15:10:42,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:10:42,753 INFO L479 AbstractCegarLoop]: Abstraction has 133878 states and 211434 transitions. [2020-07-20 15:10:42,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:10:42,753 INFO L276 IsEmpty]: Start isEmpty. Operand 133878 states and 211434 transitions. [2020-07-20 15:10:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 15:10:42,789 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:10:42,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:10:42,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:10:42,990 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:10:42,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:10:42,991 INFO L82 PathProgramCache]: Analyzing trace with hash 724848185, now seen corresponding path program 1 times [2020-07-20 15:10:42,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:10:42,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451581623] [2020-07-20 15:10:42,992 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 15:10:43,266 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:10:43,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:10:43,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:10:43,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:10:43,380 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 15:10:43,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:10:43,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451581623] [2020-07-20 15:10:43,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:10:43,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:10:43,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629197693] [2020-07-20 15:10:43,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:10:43,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:10:43,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:10:43,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:10:43,382 INFO L87 Difference]: Start difference. First operand 133878 states and 211434 transitions. Second operand 3 states. [2020-07-20 15:11:03,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:11:03,826 INFO L93 Difference]: Finished difference Result 392864 states and 619903 transitions. [2020-07-20 15:11:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:11:03,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-20 15:11:03,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:11:04,195 INFO L225 Difference]: With dead ends: 392864 [2020-07-20 15:11:04,195 INFO L226 Difference]: Without dead ends: 261151 [2020-07-20 15:11:04,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:11:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261151 states. [2020-07-20 15:11:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261151 to 261149. [2020-07-20 15:11:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261149 states. [2020-07-20 15:11:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261149 states to 261149 states and 410180 transitions. [2020-07-20 15:11:28,760 INFO L78 Accepts]: Start accepts. Automaton has 261149 states and 410180 transitions. Word has length 341 [2020-07-20 15:11:28,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:11:28,761 INFO L479 AbstractCegarLoop]: Abstraction has 261149 states and 410180 transitions. [2020-07-20 15:11:28,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:11:28,761 INFO L276 IsEmpty]: Start isEmpty. Operand 261149 states and 410180 transitions. [2020-07-20 15:11:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 15:11:28,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:11:28,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:11:29,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:11:29,033 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:11:29,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:11:29,034 INFO L82 PathProgramCache]: Analyzing trace with hash -679933956, now seen corresponding path program 1 times [2020-07-20 15:11:29,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:11:29,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657862167] [2020-07-20 15:11:29,035 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 15:11:29,262 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:11:29,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:11:29,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:11:29,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:11:29,341 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 15:11:29,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:11:29,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657862167] [2020-07-20 15:11:29,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:11:29,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:11:29,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539798212] [2020-07-20 15:11:29,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:11:29,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:11:29,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:11:29,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:11:29,343 INFO L87 Difference]: Start difference. First operand 261149 states and 410180 transitions. Second operand 4 states. [2020-07-20 15:12:10,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:10,559 INFO L93 Difference]: Finished difference Result 744508 states and 1168062 transitions. [2020-07-20 15:12:10,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:12:10,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 341 [2020-07-20 15:12:10,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:11,331 INFO L225 Difference]: With dead ends: 744508 [2020-07-20 15:12:11,332 INFO L226 Difference]: Without dead ends: 487993 [2020-07-20 15:12:11,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:12:11,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487993 states. [2020-07-20 15:12:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487993 to 263053. [2020-07-20 15:12:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263053 states. [2020-07-20 15:12:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263053 states to 263053 states and 412985 transitions. [2020-07-20 15:12:40,942 INFO L78 Accepts]: Start accepts. Automaton has 263053 states and 412985 transitions. Word has length 341 [2020-07-20 15:12:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:40,942 INFO L479 AbstractCegarLoop]: Abstraction has 263053 states and 412985 transitions. [2020-07-20 15:12:40,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:12:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 263053 states and 412985 transitions. [2020-07-20 15:12:41,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-20 15:12:41,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:41,021 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] [2020-07-20 15:12:41,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:41,222 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:41,222 INFO L82 PathProgramCache]: Analyzing trace with hash -786381170, now seen corresponding path program 1 times [2020-07-20 15:12:41,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:41,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138312093] [2020-07-20 15:12:41,223 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 15:12:41,456 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:12:41,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:41,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:41,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:41,526 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 15:12:41,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:41,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138312093] [2020-07-20 15:12:41,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:41,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:12:41,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590706958] [2020-07-20 15:12:41,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:12:41,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:41,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:12:41,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:41,529 INFO L87 Difference]: Start difference. First operand 263053 states and 412985 transitions. Second operand 3 states. [2020-07-20 15:13:27,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:13:27,506 INFO L93 Difference]: Finished difference Result 776545 states and 1218517 transitions. [2020-07-20 15:13:27,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:13:27,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2020-07-20 15:13:27,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:13:28,368 INFO L225 Difference]: With dead ends: 776545 [2020-07-20 15:13:28,368 INFO L226 Difference]: Without dead ends: 519580 [2020-07-20 15:13:28,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 341 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 15:13:29,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519580 states. [2020-07-20 15:13:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519580 to 264560. [2020-07-20 15:13:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264560 states. [2020-07-20 15:13:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264560 states to 264560 states and 415047 transitions. [2020-07-20 15:13:59,396 INFO L78 Accepts]: Start accepts. Automaton has 264560 states and 415047 transitions. Word has length 343 [2020-07-20 15:13:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:13:59,397 INFO L479 AbstractCegarLoop]: Abstraction has 264560 states and 415047 transitions. [2020-07-20 15:13:59,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:13:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 264560 states and 415047 transitions. [2020-07-20 15:13:59,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-20 15:13:59,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:13:59,477 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] [2020-07-20 15:13:59,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:13:59,685 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:13:59,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:13:59,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1628020957, now seen corresponding path program 1 times [2020-07-20 15:13:59,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:13:59,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982861791] [2020-07-20 15:13:59,687 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 15:13:59,937 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:13:59,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:13:59,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:13:59,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:14:00,025 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 15:14:00,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:14:00,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982861791] [2020-07-20 15:14:00,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:14:00,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:14:00,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898523379] [2020-07-20 15:14:00,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:14:00,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:14:00,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:14:00,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:14:00,028 INFO L87 Difference]: Start difference. First operand 264560 states and 415047 transitions. Second operand 4 states. [2020-07-20 15:14:28,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:14:28,225 INFO L93 Difference]: Finished difference Result 547985 states and 858188 transitions. [2020-07-20 15:14:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:14:28,225 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-20 15:14:28,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:14:28,619 INFO L225 Difference]: With dead ends: 547985 [2020-07-20 15:14:28,619 INFO L226 Difference]: Without dead ends: 272640 [2020-07-20 15:14:28,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 341 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 15:14:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272640 states. [2020-07-20 15:14:57,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272640 to 272638. [2020-07-20 15:14:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272638 states. [2020-07-20 15:14:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272638 states to 272638 states and 425090 transitions. [2020-07-20 15:14:57,927 INFO L78 Accepts]: Start accepts. Automaton has 272638 states and 425090 transitions. Word has length 344 [2020-07-20 15:14:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:14:57,928 INFO L479 AbstractCegarLoop]: Abstraction has 272638 states and 425090 transitions. [2020-07-20 15:14:57,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:14:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 272638 states and 425090 transitions. [2020-07-20 15:14:58,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-20 15:14:58,042 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:14:58,042 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] [2020-07-20 15:14:58,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:14:58,243 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:14:58,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:14:58,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1198170259, now seen corresponding path program 1 times [2020-07-20 15:14:58,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:14:58,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218237166] [2020-07-20 15:14:58,245 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:14:58,491 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:14:58,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:14:58,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:14:58,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:14:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:14:58,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:14:58,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218237166] [2020-07-20 15:14:58,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:14:58,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:14:58,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693095940] [2020-07-20 15:14:58,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:14:58,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:14:58,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:14:58,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:14:58,577 INFO L87 Difference]: Start difference. First operand 272638 states and 425090 transitions. Second operand 4 states. [2020-07-20 15:15:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:15:27,637 INFO L93 Difference]: Finished difference Result 400399 states and 624251 transitions. [2020-07-20 15:15:27,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:15:27,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 345 [2020-07-20 15:15:27,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:15:28,043 INFO L225 Difference]: With dead ends: 400399 [2020-07-20 15:15:28,043 INFO L226 Difference]: Without dead ends: 272801 [2020-07-20 15:15:28,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 342 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 15:15:28,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272801 states. [2020-07-20 15:15:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272801 to 264496. [2020-07-20 15:15:51,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264496 states. [2020-07-20 15:15:51,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264496 states to 264496 states and 412912 transitions. [2020-07-20 15:15:51,836 INFO L78 Accepts]: Start accepts. Automaton has 264496 states and 412912 transitions. Word has length 345 [2020-07-20 15:15:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:15:51,836 INFO L479 AbstractCegarLoop]: Abstraction has 264496 states and 412912 transitions. [2020-07-20 15:15:51,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:15:51,837 INFO L276 IsEmpty]: Start isEmpty. Operand 264496 states and 412912 transitions. [2020-07-20 15:15:51,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-20 15:15:51,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:15:51,913 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] [2020-07-20 15:15:52,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:15:52,114 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:15:52,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:15:52,115 INFO L82 PathProgramCache]: Analyzing trace with hash 97903331, now seen corresponding path program 1 times [2020-07-20 15:15:52,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:15:52,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709530645] [2020-07-20 15:15:52,116 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:15:52,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:15:52,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:15:52,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:15:52,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:15:52,398 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 15:15:52,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:15:52,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709530645] [2020-07-20 15:15:52,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:15:52,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:15:52,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671260480] [2020-07-20 15:15:52,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:15:52,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:15:52,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:15:52,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:15:52,400 INFO L87 Difference]: Start difference. First operand 264496 states and 412912 transitions. Second operand 3 states. [2020-07-20 15:16:42,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:16:42,460 INFO L93 Difference]: Finished difference Result 790432 states and 1234000 transitions. [2020-07-20 15:16:42,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:16:42,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 346 [2020-07-20 15:16:42,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:16:43,285 INFO L225 Difference]: With dead ends: 790432 [2020-07-20 15:16:43,286 INFO L226 Difference]: Without dead ends: 526966 [2020-07-20 15:16:43,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 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 15:16:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526966 states. [2020-07-20 15:17:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526966 to 264966. [2020-07-20 15:17:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264966 states. [2020-07-20 15:17:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264966 states to 264966 states and 413511 transitions. [2020-07-20 15:17:16,033 INFO L78 Accepts]: Start accepts. Automaton has 264966 states and 413511 transitions. Word has length 346 [2020-07-20 15:17:16,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:17:16,033 INFO L479 AbstractCegarLoop]: Abstraction has 264966 states and 413511 transitions. [2020-07-20 15:17:16,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:17:16,033 INFO L276 IsEmpty]: Start isEmpty. Operand 264966 states and 413511 transitions. [2020-07-20 15:17:16,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-07-20 15:17:16,108 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:17:16,108 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] [2020-07-20 15:17:16,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:17:16,309 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:17:16,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:17:16,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1887434983, now seen corresponding path program 1 times [2020-07-20 15:17:16,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:17:16,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244166407] [2020-07-20 15:17:16,311 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:17:16,537 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:17:16,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:17:16,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:17:16,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:17:16,705 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 15:17:16,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:17:16,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244166407] [2020-07-20 15:17:16,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:17:16,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 15:17:16,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742286710] [2020-07-20 15:17:16,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 15:17:16,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:17:16,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 15:17:16,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 15:17:16,708 INFO L87 Difference]: Start difference. First operand 264966 states and 413511 transitions. Second operand 9 states. [2020-07-20 15:20:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:20:15,229 INFO L93 Difference]: Finished difference Result 1674422 states and 2618482 transitions. [2020-07-20 15:20:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 15:20:15,230 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 347 [2020-07-20 15:20:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:20:18,012 INFO L225 Difference]: With dead ends: 1674422 [2020-07-20 15:20:18,012 INFO L226 Difference]: Without dead ends: 1567380 [2020-07-20 15:20:18,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=1054, Unknown=0, NotChecked=0, Total=1406