/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:30:34,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:30:34,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:30:34,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:30:34,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:30:34,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:30:34,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:30:34,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:30:34,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:30:34,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:30:34,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:30:34,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:30:34,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:30:34,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:30:34,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:30:34,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:30:34,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:30:34,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:30:34,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:30:34,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:30:34,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:30:34,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:30:34,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:30:34,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:30:34,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 12:30:34,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:30:34,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:30:34,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:30:34,347 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 12:30:34,371 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:30:34,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:30:34,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:30:34,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:30:34,373 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:30:34,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:30:34,373 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:30:34,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:30:34,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:30:34,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:30:34,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:30:34,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:30:34,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:30:34,376 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:30:34,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:30:34,376 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:30:34,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:30:34,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:30:34,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:30:34,377 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:30:34,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:30:34,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:30:34,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:30:34,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:30:34,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:30:34,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:30:34,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:34,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:30:34,379 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:30:34,379 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 12:30:34,655 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:30:34,669 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:30:34,674 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:30:34,675 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:30:34,675 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:30:34,676 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 12:30:34,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367126db1/a99969c23cd04b2e8713d7022b2f76b3/FLAG0573e512b [2020-07-20 12:30:35,337 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:30:35,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 12:30:35,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367126db1/a99969c23cd04b2e8713d7022b2f76b3/FLAG0573e512b [2020-07-20 12:30:35,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367126db1/a99969c23cd04b2e8713d7022b2f76b3 [2020-07-20 12:30:35,561 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:30:35,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:30:35,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:30:35,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:30:35,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:30:35,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:30:35" (1/1) ... [2020-07-20 12:30:35,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8eaf58e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:35, skipping insertion in model container [2020-07-20 12:30:35,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:30:35" (1/1) ... [2020-07-20 12:30:35,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:30:35,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:30:36,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:30:36,711 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:30:37,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:30:37,146 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:30:37,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:37 WrapperNode [2020-07-20 12:30:37,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:30:37,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:30:37,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:30:37,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:30:37,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:37" (1/1) ... [2020-07-20 12:30:37,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:37" (1/1) ... [2020-07-20 12:30:37,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:37" (1/1) ... [2020-07-20 12:30:37,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:37" (1/1) ... [2020-07-20 12:30:37,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:37" (1/1) ... [2020-07-20 12:30:37,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:37" (1/1) ... [2020-07-20 12:30:37,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:37" (1/1) ... [2020-07-20 12:30:37,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:30:37,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:30:37,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:30:37,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:30:37,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:37" (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 12:30:37,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:30:37,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:30:37,400 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:30:37,400 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:30:37,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:30:37,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 12:30:37,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 12:30:37,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 12:30:37,401 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 12:30:37,401 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:30:37,401 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:30:37,402 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 12:30:37,402 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 12:30:37,402 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 12:30:37,402 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 12:30:37,402 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 12:30:37,403 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 12:30:37,403 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 12:30:37,403 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 12:30:37,403 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:30:37,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:30:37,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:30:39,746 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:30:39,746 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 12:30:39,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:30:39 BoogieIcfgContainer [2020-07-20 12:30:39,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:30:39,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:30:39,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:30:39,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:30:39,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:30:35" (1/3) ... [2020-07-20 12:30:39,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5382516d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:30:39, skipping insertion in model container [2020-07-20 12:30:39,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:30:37" (2/3) ... [2020-07-20 12:30:39,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5382516d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:30:39, skipping insertion in model container [2020-07-20 12:30:39,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:30:39" (3/3) ... [2020-07-20 12:30:39,763 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 12:30:39,773 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:30:39,785 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:30:39,799 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:30:39,827 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:30:39,827 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:30:39,827 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:30:39,827 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:30:39,828 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:30:39,828 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:30:39,828 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:30:39,828 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:30:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-07-20 12:30:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-20 12:30:39,889 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:39,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:39,891 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:39,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:39,897 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-07-20 12:30:39,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:39,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931617533] [2020-07-20 12:30:39,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:40,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 2039 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:30:40,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:40,730 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 12:30:40,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:40,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931617533] [2020-07-20 12:30:40,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:40,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:30:40,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392429199] [2020-07-20 12:30:40,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:30:40,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:40,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:30:40,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:40,750 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 3 states. [2020-07-20 12:30:41,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:41,017 INFO L93 Difference]: Finished difference Result 1140 states and 1981 transitions. [2020-07-20 12:30:41,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:30:41,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-20 12:30:41,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:41,049 INFO L225 Difference]: With dead ends: 1140 [2020-07-20 12:30:41,049 INFO L226 Difference]: Without dead ends: 973 [2020-07-20 12:30:41,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 12:30:41,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2020-07-20 12:30:41,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 971. [2020-07-20 12:30:41,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 971 states. [2020-07-20 12:30:41,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1536 transitions. [2020-07-20 12:30:41,185 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1536 transitions. Word has length 318 [2020-07-20 12:30:41,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:41,186 INFO L479 AbstractCegarLoop]: Abstraction has 971 states and 1536 transitions. [2020-07-20 12:30:41,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:30:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1536 transitions. [2020-07-20 12:30:41,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-20 12:30:41,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:41,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:41,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:41,409 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:41,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:41,410 INFO L82 PathProgramCache]: Analyzing trace with hash -566193409, now seen corresponding path program 1 times [2020-07-20 12:30:41,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:41,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408429472] [2020-07-20 12:30:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:41,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 2040 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:30:41,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:41,927 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 12:30:41,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:41,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408429472] [2020-07-20 12:30:41,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:41,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:30:41,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84572808] [2020-07-20 12:30:41,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:30:41,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:41,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:30:41,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:41,932 INFO L87 Difference]: Start difference. First operand 971 states and 1536 transitions. Second operand 3 states. [2020-07-20 12:30:42,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:42,126 INFO L93 Difference]: Finished difference Result 1980 states and 3152 transitions. [2020-07-20 12:30:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:30:42,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-20 12:30:42,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:42,137 INFO L225 Difference]: With dead ends: 1980 [2020-07-20 12:30:42,137 INFO L226 Difference]: Without dead ends: 1621 [2020-07-20 12:30:42,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 12:30:42,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2020-07-20 12:30:42,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1615. [2020-07-20 12:30:42,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1615 states. [2020-07-20 12:30:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2552 transitions. [2020-07-20 12:30:42,250 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2552 transitions. Word has length 318 [2020-07-20 12:30:42,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:42,251 INFO L479 AbstractCegarLoop]: Abstraction has 1615 states and 2552 transitions. [2020-07-20 12:30:42,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:30:42,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2552 transitions. [2020-07-20 12:30:42,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-20 12:30:42,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:42,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:42,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:42,481 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:42,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1708782165, now seen corresponding path program 1 times [2020-07-20 12:30:42,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:42,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49213839] [2020-07-20 12:30:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 2040 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:30:42,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:43,007 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 12:30:43,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:43,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49213839] [2020-07-20 12:30:43,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:43,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:30:43,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124814937] [2020-07-20 12:30:43,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:30:43,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:43,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:30:43,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:43,011 INFO L87 Difference]: Start difference. First operand 1615 states and 2552 transitions. Second operand 3 states. [2020-07-20 12:30:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:43,235 INFO L93 Difference]: Finished difference Result 3566 states and 5678 transitions. [2020-07-20 12:30:43,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:30:43,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-20 12:30:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:43,255 INFO L225 Difference]: With dead ends: 3566 [2020-07-20 12:30:43,255 INFO L226 Difference]: Without dead ends: 2865 [2020-07-20 12:30:43,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 12:30:43,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2020-07-20 12:30:43,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2861. [2020-07-20 12:30:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2861 states. [2020-07-20 12:30:43,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 4513 transitions. [2020-07-20 12:30:43,389 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 4513 transitions. Word has length 318 [2020-07-20 12:30:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:43,390 INFO L479 AbstractCegarLoop]: Abstraction has 2861 states and 4513 transitions. [2020-07-20 12:30:43,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:30:43,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 4513 transitions. [2020-07-20 12:30:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-20 12:30:43,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:43,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:43,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:43,612 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:43,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:43,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times [2020-07-20 12:30:43,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:43,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327588820] [2020-07-20 12:30:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:43,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 2041 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:30:43,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:44,098 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 12:30:44,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:44,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327588820] [2020-07-20 12:30:44,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:44,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:30:44,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041105260] [2020-07-20 12:30:44,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:30:44,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:44,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:30:44,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:44,101 INFO L87 Difference]: Start difference. First operand 2861 states and 4513 transitions. Second operand 3 states. [2020-07-20 12:30:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:44,401 INFO L93 Difference]: Finished difference Result 6627 states and 10550 transitions. [2020-07-20 12:30:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:30:44,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-20 12:30:44,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:44,428 INFO L225 Difference]: With dead ends: 6627 [2020-07-20 12:30:44,429 INFO L226 Difference]: Without dead ends: 5351 [2020-07-20 12:30:44,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 12:30:44,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2020-07-20 12:30:44,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 5345. [2020-07-20 12:30:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5345 states. [2020-07-20 12:30:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5345 states to 5345 states and 8418 transitions. [2020-07-20 12:30:44,653 INFO L78 Accepts]: Start accepts. Automaton has 5345 states and 8418 transitions. Word has length 318 [2020-07-20 12:30:44,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:44,654 INFO L479 AbstractCegarLoop]: Abstraction has 5345 states and 8418 transitions. [2020-07-20 12:30:44,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:30:44,655 INFO L276 IsEmpty]: Start isEmpty. Operand 5345 states and 8418 transitions. [2020-07-20 12:30:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-20 12:30:44,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:44,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:44,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:44,885 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:44,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:44,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times [2020-07-20 12:30:44,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:44,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299591384] [2020-07-20 12:30:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:45,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 2042 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:30:45,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:45,386 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 12:30:45,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:45,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299591384] [2020-07-20 12:30:45,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:45,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:30:45,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105500602] [2020-07-20 12:30:45,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:30:45,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:45,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:30:45,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:45,393 INFO L87 Difference]: Start difference. First operand 5345 states and 8418 transitions. Second operand 3 states. [2020-07-20 12:30:45,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:45,810 INFO L93 Difference]: Finished difference Result 12705 states and 20210 transitions. [2020-07-20 12:30:45,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:30:45,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-20 12:30:45,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:45,859 INFO L225 Difference]: With dead ends: 12705 [2020-07-20 12:30:45,859 INFO L226 Difference]: Without dead ends: 10260 [2020-07-20 12:30:45,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 12:30:45,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10260 states. [2020-07-20 12:30:46,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10260 to 10250. [2020-07-20 12:30:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10250 states. [2020-07-20 12:30:46,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10250 states to 10250 states and 16118 transitions. [2020-07-20 12:30:46,339 INFO L78 Accepts]: Start accepts. Automaton has 10250 states and 16118 transitions. Word has length 318 [2020-07-20 12:30:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:46,347 INFO L479 AbstractCegarLoop]: Abstraction has 10250 states and 16118 transitions. [2020-07-20 12:30:46,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:30:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 10250 states and 16118 transitions. [2020-07-20 12:30:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-20 12:30:46,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:46,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:46,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:46,580 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:46,580 INFO L82 PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times [2020-07-20 12:30:46,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:46,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178042594] [2020-07-20 12:30:46,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:46,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 2043 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:30:46,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:47,059 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 12:30:47,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:47,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178042594] [2020-07-20 12:30:47,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:47,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:30:47,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594576904] [2020-07-20 12:30:47,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:30:47,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:47,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:30:47,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:30:47,063 INFO L87 Difference]: Start difference. First operand 10250 states and 16118 transitions. Second operand 4 states. [2020-07-20 12:30:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:47,812 INFO L93 Difference]: Finished difference Result 30322 states and 47641 transitions. [2020-07-20 12:30:47,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:30:47,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-20 12:30:47,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:47,872 INFO L225 Difference]: With dead ends: 30322 [2020-07-20 12:30:47,872 INFO L226 Difference]: Without dead ends: 20085 [2020-07-20 12:30:47,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:30:47,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20085 states. [2020-07-20 12:30:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20085 to 20083. [2020-07-20 12:30:48,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20083 states. [2020-07-20 12:30:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20083 states to 20083 states and 31402 transitions. [2020-07-20 12:30:49,445 INFO L78 Accepts]: Start accepts. Automaton has 20083 states and 31402 transitions. Word has length 318 [2020-07-20 12:30:49,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:49,445 INFO L479 AbstractCegarLoop]: Abstraction has 20083 states and 31402 transitions. [2020-07-20 12:30:49,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:30:49,446 INFO L276 IsEmpty]: Start isEmpty. Operand 20083 states and 31402 transitions. [2020-07-20 12:30:49,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-20 12:30:49,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:49,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:49,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:49,687 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:49,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:49,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1929233080, now seen corresponding path program 1 times [2020-07-20 12:30:49,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:49,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009329598] [2020-07-20 12:30:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:50,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 2046 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:30:50,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:50,164 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 12:30:50,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:50,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009329598] [2020-07-20 12:30:50,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:50,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:30:50,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755637739] [2020-07-20 12:30:50,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:30:50,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:50,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:30:50,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:50,167 INFO L87 Difference]: Start difference. First operand 20083 states and 31402 transitions. Second operand 3 states. [2020-07-20 12:30:51,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:51,164 INFO L93 Difference]: Finished difference Result 59285 states and 92581 transitions. [2020-07-20 12:30:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:30:51,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 320 [2020-07-20 12:30:51,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:51,255 INFO L225 Difference]: With dead ends: 59285 [2020-07-20 12:30:51,256 INFO L226 Difference]: Without dead ends: 39342 [2020-07-20 12:30:51,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39342 states. [2020-07-20 12:30:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39342 to 39340. [2020-07-20 12:30:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39340 states. [2020-07-20 12:30:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39340 states to 39340 states and 61150 transitions. [2020-07-20 12:30:52,549 INFO L78 Accepts]: Start accepts. Automaton has 39340 states and 61150 transitions. Word has length 320 [2020-07-20 12:30:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:52,550 INFO L479 AbstractCegarLoop]: Abstraction has 39340 states and 61150 transitions. [2020-07-20 12:30:52,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:30:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 39340 states and 61150 transitions. [2020-07-20 12:30:52,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-20 12:30:52,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:52,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:52,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:52,813 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:52,814 INFO L82 PathProgramCache]: Analyzing trace with hash -752458947, now seen corresponding path program 1 times [2020-07-20 12:30:52,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:52,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616291651] [2020-07-20 12:30:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:53,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 2048 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:30:53,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:53,176 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 12:30:53,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:53,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616291651] [2020-07-20 12:30:53,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:53,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:30:53,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094043927] [2020-07-20 12:30:53,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:30:53,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:53,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:30:53,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:53,179 INFO L87 Difference]: Start difference. First operand 39340 states and 61150 transitions. Second operand 3 states. [2020-07-20 12:30:55,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:55,683 INFO L93 Difference]: Finished difference Result 117861 states and 183174 transitions. [2020-07-20 12:30:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:30:55,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 320 [2020-07-20 12:30:55,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:55,810 INFO L225 Difference]: With dead ends: 117861 [2020-07-20 12:30:55,810 INFO L226 Difference]: Without dead ends: 78548 [2020-07-20 12:30:55,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78548 states. [2020-07-20 12:30:57,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78548 to 39351. [2020-07-20 12:30:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39351 states. [2020-07-20 12:30:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39351 states to 39351 states and 61165 transitions. [2020-07-20 12:30:57,295 INFO L78 Accepts]: Start accepts. Automaton has 39351 states and 61165 transitions. Word has length 320 [2020-07-20 12:30:57,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:57,295 INFO L479 AbstractCegarLoop]: Abstraction has 39351 states and 61165 transitions. [2020-07-20 12:30:57,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:30:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand 39351 states and 61165 transitions. [2020-07-20 12:30:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-07-20 12:30:57,329 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:57,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:30:57,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:57,531 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:57,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:57,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1043368483, now seen corresponding path program 1 times [2020-07-20 12:30:57,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:57,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153866380] [2020-07-20 12:30:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:57,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:30:57,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:57,906 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 12:30:57,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:57,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153866380] [2020-07-20 12:30:57,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:57,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:30:57,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286536174] [2020-07-20 12:30:57,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:30:57,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:57,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:30:57,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:30:57,909 INFO L87 Difference]: Start difference. First operand 39351 states and 61165 transitions. Second operand 3 states. [2020-07-20 12:30:59,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:59,426 INFO L93 Difference]: Finished difference Result 117958 states and 183341 transitions. [2020-07-20 12:31:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:31:00,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 321 [2020-07-20 12:31:00,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:31:00,730 INFO L225 Difference]: With dead ends: 117958 [2020-07-20 12:31:00,730 INFO L226 Difference]: Without dead ends: 78657 [2020-07-20 12:31:00,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:31:00,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78657 states. [2020-07-20 12:31:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78657 to 39367. [2020-07-20 12:31:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39367 states. [2020-07-20 12:31:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39367 states to 39367 states and 61184 transitions. [2020-07-20 12:31:01,969 INFO L78 Accepts]: Start accepts. Automaton has 39367 states and 61184 transitions. Word has length 321 [2020-07-20 12:31:01,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:31:01,969 INFO L479 AbstractCegarLoop]: Abstraction has 39367 states and 61184 transitions. [2020-07-20 12:31:01,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:31:01,969 INFO L276 IsEmpty]: Start isEmpty. Operand 39367 states and 61184 transitions. [2020-07-20 12:31:01,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-20 12:31:01,987 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:31:01,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:31:02,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:02,188 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:31:02,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:31:02,189 INFO L82 PathProgramCache]: Analyzing trace with hash 131987891, now seen corresponding path program 1 times [2020-07-20 12:31:02,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:31:02,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008243010] [2020-07-20 12:31:02,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:31:02,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:31:02,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:31:02,763 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 12:31:02,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:31:02,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008243010] [2020-07-20 12:31:02,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:31:02,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:31:02,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145837399] [2020-07-20 12:31:02,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:31:02,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:31:02,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:31:02,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:31:02,765 INFO L87 Difference]: Start difference. First operand 39367 states and 61184 transitions. Second operand 3 states. [2020-07-20 12:31:04,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:31:04,513 INFO L93 Difference]: Finished difference Result 111877 states and 173639 transitions. [2020-07-20 12:31:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:31:04,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 322 [2020-07-20 12:31:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:31:04,592 INFO L225 Difference]: With dead ends: 111877 [2020-07-20 12:31:04,593 INFO L226 Difference]: Without dead ends: 72707 [2020-07-20 12:31:04,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 320 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 12:31:04,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72707 states. [2020-07-20 12:31:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72707 to 72705. [2020-07-20 12:31:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72705 states. [2020-07-20 12:31:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72705 states to 72705 states and 112234 transitions. [2020-07-20 12:31:08,218 INFO L78 Accepts]: Start accepts. Automaton has 72705 states and 112234 transitions. Word has length 322 [2020-07-20 12:31:08,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:31:08,218 INFO L479 AbstractCegarLoop]: Abstraction has 72705 states and 112234 transitions. [2020-07-20 12:31:08,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:31:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 72705 states and 112234 transitions. [2020-07-20 12:31:08,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-20 12:31:08,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:31:08,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:31:08,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:08,475 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:31:08,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:31:08,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1165677968, now seen corresponding path program 1 times [2020-07-20 12:31:08,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:31:08,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23794439] [2020-07-20 12:31:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:31:08,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 2050 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:31:08,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:31:08,875 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 12:31:08,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:31:08,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23794439] [2020-07-20 12:31:08,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:31:08,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:31:08,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004908526] [2020-07-20 12:31:08,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:31:08,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:31:08,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:31:08,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:31:08,881 INFO L87 Difference]: Start difference. First operand 72705 states and 112234 transitions. Second operand 4 states. [2020-07-20 12:31:12,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:31:12,514 INFO L93 Difference]: Finished difference Result 212637 states and 328014 transitions. [2020-07-20 12:31:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:31:12,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-07-20 12:31:12,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:31:12,654 INFO L225 Difference]: With dead ends: 212637 [2020-07-20 12:31:12,654 INFO L226 Difference]: Without dead ends: 140438 [2020-07-20 12:31:12,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:31:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140438 states. [2020-07-20 12:31:17,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140438 to 72954. [2020-07-20 12:31:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72954 states. [2020-07-20 12:31:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72954 states to 72954 states and 112653 transitions. [2020-07-20 12:31:17,579 INFO L78 Accepts]: Start accepts. Automaton has 72954 states and 112653 transitions. Word has length 322 [2020-07-20 12:31:17,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:31:17,579 INFO L479 AbstractCegarLoop]: Abstraction has 72954 states and 112653 transitions. [2020-07-20 12:31:17,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:31:17,579 INFO L276 IsEmpty]: Start isEmpty. Operand 72954 states and 112653 transitions. [2020-07-20 12:31:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 12:31:17,616 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:31:17,616 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 12:31:17,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:17,817 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:31:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:31:17,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1127817642, now seen corresponding path program 1 times [2020-07-20 12:31:17,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:31:17,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110908099] [2020-07-20 12:31:17,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:31:18,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 2065 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:31:18,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:31:18,639 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 12:31:18,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:31:18,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110908099] [2020-07-20 12:31:18,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:31:18,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:31:18,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991438831] [2020-07-20 12:31:18,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:31:18,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:31:18,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:31:18,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:31:18,643 INFO L87 Difference]: Start difference. First operand 72954 states and 112653 transitions. Second operand 8 states. [2020-07-20 12:31:31,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:31:31,176 INFO L93 Difference]: Finished difference Result 273514 states and 429137 transitions. [2020-07-20 12:31:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:31:31,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 324 [2020-07-20 12:31:31,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:31:31,413 INFO L225 Difference]: With dead ends: 273514 [2020-07-20 12:31:31,413 INFO L226 Difference]: Without dead ends: 202499 [2020-07-20 12:31:31,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 12:31:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202499 states. [2020-07-20 12:31:36,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202499 to 115822. [2020-07-20 12:31:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115822 states. [2020-07-20 12:31:37,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115822 states to 115822 states and 177989 transitions. [2020-07-20 12:31:37,079 INFO L78 Accepts]: Start accepts. Automaton has 115822 states and 177989 transitions. Word has length 324 [2020-07-20 12:31:37,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:31:37,080 INFO L479 AbstractCegarLoop]: Abstraction has 115822 states and 177989 transitions. [2020-07-20 12:31:37,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:31:37,080 INFO L276 IsEmpty]: Start isEmpty. Operand 115822 states and 177989 transitions. [2020-07-20 12:31:37,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 12:31:37,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:31:37,121 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 12:31:37,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:37,323 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:31:37,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:31:37,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1367810770, now seen corresponding path program 1 times [2020-07-20 12:31:37,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:31:37,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894694797] [2020-07-20 12:31:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:31:37,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 2058 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:31:37,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:31:37,715 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 12:31:37,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:31:37,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894694797] [2020-07-20 12:31:37,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:31:37,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:31:37,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183169664] [2020-07-20 12:31:37,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:31:37,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:31:37,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:31:37,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:31:37,718 INFO L87 Difference]: Start difference. First operand 115822 states and 177989 transitions. Second operand 3 states. [2020-07-20 12:31:47,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:31:47,813 INFO L93 Difference]: Finished difference Result 282743 states and 435793 transitions. [2020-07-20 12:31:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:31:47,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-20 12:31:47,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:31:47,995 INFO L225 Difference]: With dead ends: 282743 [2020-07-20 12:31:47,995 INFO L226 Difference]: Without dead ends: 168580 [2020-07-20 12:31:48,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:31:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168580 states. [2020-07-20 12:31:54,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168580 to 147138. [2020-07-20 12:31:54,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147138 states. [2020-07-20 12:31:55,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147138 states to 147138 states and 227553 transitions. [2020-07-20 12:31:55,060 INFO L78 Accepts]: Start accepts. Automaton has 147138 states and 227553 transitions. Word has length 324 [2020-07-20 12:31:55,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:31:55,061 INFO L479 AbstractCegarLoop]: Abstraction has 147138 states and 227553 transitions. [2020-07-20 12:31:55,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:31:55,061 INFO L276 IsEmpty]: Start isEmpty. Operand 147138 states and 227553 transitions. [2020-07-20 12:31:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 12:31:55,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:31:55,105 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 12:31:55,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:55,306 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:31:55,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:31:55,307 INFO L82 PathProgramCache]: Analyzing trace with hash 480416705, now seen corresponding path program 1 times [2020-07-20 12:31:55,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:31:55,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475178124] [2020-07-20 12:31:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:31:55,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 2055 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:31:55,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:31:55,678 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 12:31:55,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:31:55,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475178124] [2020-07-20 12:31:55,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:31:55,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:31:55,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593661615] [2020-07-20 12:31:55,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:31:55,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:31:55,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:31:55,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:31:55,680 INFO L87 Difference]: Start difference. First operand 147138 states and 227553 transitions. Second operand 3 states. [2020-07-20 12:32:12,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:12,202 INFO L93 Difference]: Finished difference Result 439902 states and 680010 transitions. [2020-07-20 12:32:12,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:12,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-20 12:32:12,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:12,534 INFO L225 Difference]: With dead ends: 439902 [2020-07-20 12:32:12,534 INFO L226 Difference]: Without dead ends: 293527 [2020-07-20 12:32:12,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:12,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293527 states. [2020-07-20 12:32:24,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293527 to 147242. [2020-07-20 12:32:24,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147242 states. [2020-07-20 12:32:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147242 states to 147242 states and 227689 transitions. [2020-07-20 12:32:25,153 INFO L78 Accepts]: Start accepts. Automaton has 147242 states and 227689 transitions. Word has length 324 [2020-07-20 12:32:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:25,153 INFO L479 AbstractCegarLoop]: Abstraction has 147242 states and 227689 transitions. [2020-07-20 12:32:25,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 147242 states and 227689 transitions. [2020-07-20 12:32:25,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-07-20 12:32:25,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:25,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:25,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:25,401 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:25,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:25,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1136142015, now seen corresponding path program 1 times [2020-07-20 12:32:25,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:25,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655169943] [2020-07-20 12:32:25,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:25,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 2056 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:32:25,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:25,769 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 12:32:25,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:25,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655169943] [2020-07-20 12:32:25,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:25,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:25,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867147715] [2020-07-20 12:32:25,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:25,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:25,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:25,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:25,771 INFO L87 Difference]: Start difference. First operand 147242 states and 227689 transitions. Second operand 3 states. [2020-07-20 12:32:40,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:40,368 INFO L93 Difference]: Finished difference Result 440035 states and 680175 transitions. [2020-07-20 12:32:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:40,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 325 [2020-07-20 12:32:40,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:40,723 INFO L225 Difference]: With dead ends: 440035 [2020-07-20 12:32:40,723 INFO L226 Difference]: Without dead ends: 293647 [2020-07-20 12:32:40,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:41,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293647 states. [2020-07-20 12:32:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293647 to 147384. [2020-07-20 12:32:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147384 states. [2020-07-20 12:32:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147384 states to 147384 states and 227860 transitions. [2020-07-20 12:32:55,401 INFO L78 Accepts]: Start accepts. Automaton has 147384 states and 227860 transitions. Word has length 325 [2020-07-20 12:32:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:55,401 INFO L479 AbstractCegarLoop]: Abstraction has 147384 states and 227860 transitions. [2020-07-20 12:32:55,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:55,401 INFO L276 IsEmpty]: Start isEmpty. Operand 147384 states and 227860 transitions. [2020-07-20 12:32:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 12:32:55,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:55,446 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 12:32:55,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:55,647 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:55,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:55,648 INFO L82 PathProgramCache]: Analyzing trace with hash -624663126, now seen corresponding path program 1 times [2020-07-20 12:32:55,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:55,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397211581] [2020-07-20 12:32:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:55,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 2064 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:32:55,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:56,442 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 12:32:56,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:56,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397211581] [2020-07-20 12:32:56,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:56,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:32:56,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144154071] [2020-07-20 12:32:56,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:32:56,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:56,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:32:56,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:32:56,444 INFO L87 Difference]: Start difference. First operand 147384 states and 227860 transitions. Second operand 8 states. [2020-07-20 12:33:26,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:33:26,381 INFO L93 Difference]: Finished difference Result 495924 states and 772646 transitions. [2020-07-20 12:33:26,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:33:26,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 326 [2020-07-20 12:33:26,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:33:26,976 INFO L225 Difference]: With dead ends: 495924 [2020-07-20 12:33:26,976 INFO L226 Difference]: Without dead ends: 431518 [2020-07-20 12:33:27,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 12:33:27,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431518 states. [2020-07-20 12:33:44,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431518 to 228578. [2020-07-20 12:33:44,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228578 states. [2020-07-20 12:33:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228578 states to 228578 states and 353154 transitions. [2020-07-20 12:33:50,944 INFO L78 Accepts]: Start accepts. Automaton has 228578 states and 353154 transitions. Word has length 326 [2020-07-20 12:33:50,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:33:50,945 INFO L479 AbstractCegarLoop]: Abstraction has 228578 states and 353154 transitions. [2020-07-20 12:33:50,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:33:50,945 INFO L276 IsEmpty]: Start isEmpty. Operand 228578 states and 353154 transitions. [2020-07-20 12:33:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 12:33:50,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:33:50,999 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 12:33:51,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:51,200 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:33:51,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:33:51,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1110795874, now seen corresponding path program 1 times [2020-07-20 12:33:51,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:33:51,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366282217] [2020-07-20 12:33:51,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:33:51,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:33:51,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:33:51,586 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 12:33:51,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:33:51,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366282217] [2020-07-20 12:33:51,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:33:51,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:33:51,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367617319] [2020-07-20 12:33:51,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:33:51,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:33:51,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:33:51,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:33:51,588 INFO L87 Difference]: Start difference. First operand 228578 states and 353154 transitions. Second operand 3 states. [2020-07-20 12:34:12,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:34:12,871 INFO L93 Difference]: Finished difference Result 562171 states and 870818 transitions. [2020-07-20 12:34:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:34:12,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 12:34:12,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:34:13,290 INFO L225 Difference]: With dead ends: 562171 [2020-07-20 12:34:13,290 INFO L226 Difference]: Without dead ends: 335646 [2020-07-20 12:34:13,436 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 12:34:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335646 states. [2020-07-20 12:34:39,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335646 to 299996. [2020-07-20 12:34:39,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299996 states. [2020-07-20 12:34:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299996 states to 299996 states and 462140 transitions. [2020-07-20 12:34:40,257 INFO L78 Accepts]: Start accepts. Automaton has 299996 states and 462140 transitions. Word has length 326 [2020-07-20 12:34:40,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:34:40,258 INFO L479 AbstractCegarLoop]: Abstraction has 299996 states and 462140 transitions. [2020-07-20 12:34:40,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:34:40,258 INFO L276 IsEmpty]: Start isEmpty. Operand 299996 states and 462140 transitions. [2020-07-20 12:34:40,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 12:34:40,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:34:40,316 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 12:34:40,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:34:40,518 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:34:40,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:34:40,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2129040620, now seen corresponding path program 1 times [2020-07-20 12:34:40,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:34:40,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199126178] [2020-07-20 12:34:40,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:34:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:34:40,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:34:40,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:34:40,933 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 12:34:40,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:34:40,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199126178] [2020-07-20 12:34:40,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:34:40,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:34:40,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750851340] [2020-07-20 12:34:40,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:34:40,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:34:40,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:34:40,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:34:40,941 INFO L87 Difference]: Start difference. First operand 299996 states and 462140 transitions. Second operand 4 states. [2020-07-20 12:35:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:35:27,166 INFO L93 Difference]: Finished difference Result 890167 states and 1370612 transitions. [2020-07-20 12:35:27,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:35:27,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-20 12:35:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:35:27,964 INFO L225 Difference]: With dead ends: 890167 [2020-07-20 12:35:27,964 INFO L226 Difference]: Without dead ends: 590506 [2020-07-20 12:35:28,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:35:28,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590506 states. [2020-07-20 12:36:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590506 to 590504. [2020-07-20 12:36:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590504 states. [2020-07-20 12:36:23,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590504 states to 590504 states and 905150 transitions. [2020-07-20 12:36:23,369 INFO L78 Accepts]: Start accepts. Automaton has 590504 states and 905150 transitions. Word has length 326 [2020-07-20 12:36:23,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:23,369 INFO L479 AbstractCegarLoop]: Abstraction has 590504 states and 905150 transitions. [2020-07-20 12:36:23,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:36:23,370 INFO L276 IsEmpty]: Start isEmpty. Operand 590504 states and 905150 transitions. [2020-07-20 12:36:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 12:36:23,493 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:23,493 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 12:36:23,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:23,694 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:23,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1579408490, now seen corresponding path program 1 times [2020-07-20 12:36:23,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:23,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937029654] [2020-07-20 12:36:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:25,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:36:25,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:25,222 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 12:36:25,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:25,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937029654] [2020-07-20 12:36:25,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:25,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:36:25,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127778071] [2020-07-20 12:36:25,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:36:25,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:25,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:36:25,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:25,224 INFO L87 Difference]: Start difference. First operand 590504 states and 905150 transitions. Second operand 3 states. [2020-07-20 12:38:04,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:38:04,636 INFO L93 Difference]: Finished difference Result 1745700 states and 2672398 transitions. [2020-07-20 12:38:04,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:38:04,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 12:38:04,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:38:06,462 INFO L225 Difference]: With dead ends: 1745700 [2020-07-20 12:38:06,462 INFO L226 Difference]: Without dead ends: 1155745 [2020-07-20 12:38:06,935 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 12:38:07,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155745 states. [2020-07-20 12:40:10,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155745 to 1155743. [2020-07-20 12:40:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1155743 states.