/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:51:21,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:51:21,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:51:21,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:51:21,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:51:21,103 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:51:21,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:51:21,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:51:21,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:51:21,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:51:21,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:51:21,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:51:21,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:51:21,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:51:21,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:51:21,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:51:21,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:51:21,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:51:21,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:51:21,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:51:21,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:51:21,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:51:21,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:51:21,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:51:21,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:51:21,130 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 23:51:21,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 23:51:21,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 23:51:21,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 23:51:21,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 23:51:21,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 23:51:21,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 23:51:21,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 23:51:21,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:51:21,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:51:21,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:51:21,137 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 23:51:21,155 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:51:21,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:51:21,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:51:21,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:51:21,160 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:51:21,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:51:21,160 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:51:21,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:51:21,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:51:21,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:51:21,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:51:21,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:51:21,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:51:21,163 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:51:21,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:51:21,163 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:51:21,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:51:21,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:51:21,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:51:21,164 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:51:21,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:51:21,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:51:21,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:51:21,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:51:21,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:51:21,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:51:21,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:21,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:51:21,166 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:51:21,166 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:51:21,444 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:51:21,457 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:51:21,461 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:51:21,463 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:51:21,463 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:51:21,464 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 23:51:21,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baf1d34ca/a51886ac4db140518369d45da7bc70b8/FLAG103194b27 [2020-07-21 23:51:22,288 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:51:22,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 23:51:22,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baf1d34ca/a51886ac4db140518369d45da7bc70b8/FLAG103194b27 [2020-07-21 23:51:22,422 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baf1d34ca/a51886ac4db140518369d45da7bc70b8 [2020-07-21 23:51:22,434 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:51:22,437 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:51:22,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:51:22,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:51:22,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:51:22,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:51:22" (1/1) ... [2020-07-21 23:51:22,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653358de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:22, skipping insertion in model container [2020-07-21 23:51:22,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:51:22" (1/1) ... [2020-07-21 23:51:22,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:51:22,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:51:23,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:51:23,607 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:51:24,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:51:24,244 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:51:24,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:24 WrapperNode [2020-07-21 23:51:24,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:51:24,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:51:24,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:51:24,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:51:24,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:24" (1/1) ... [2020-07-21 23:51:24,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:24" (1/1) ... [2020-07-21 23:51:24,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:24" (1/1) ... [2020-07-21 23:51:24,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:24" (1/1) ... [2020-07-21 23:51:24,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:24" (1/1) ... [2020-07-21 23:51:24,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:24" (1/1) ... [2020-07-21 23:51:24,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:24" (1/1) ... [2020-07-21 23:51:24,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:51:24,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:51:24,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:51:24,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:51:24,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:51:24,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:51:24,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:51:24,499 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:51:24,499 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:51:24,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:51:24,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 23:51:24,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 23:51:24,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 23:51:24,500 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 23:51:24,500 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:51:24,500 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:51:24,500 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 23:51:24,501 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 23:51:24,501 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 23:51:24,501 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 23:51:24,501 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 23:51:24,501 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 23:51:24,501 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 23:51:24,502 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 23:51:24,502 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:51:24,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:51:24,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:51:27,147 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:51:27,148 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 23:51:27,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:51:27 BoogieIcfgContainer [2020-07-21 23:51:27,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:51:27,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:51:27,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:51:27,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:51:27,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:51:22" (1/3) ... [2020-07-21 23:51:27,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634f07eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:51:27, skipping insertion in model container [2020-07-21 23:51:27,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:24" (2/3) ... [2020-07-21 23:51:27,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634f07eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:51:27, skipping insertion in model container [2020-07-21 23:51:27,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:51:27" (3/3) ... [2020-07-21 23:51:27,180 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 23:51:27,192 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:51:27,205 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:51:27,218 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:51:27,247 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:51:27,247 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:51:27,247 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:51:27,247 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:51:27,247 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:51:27,248 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:51:27,248 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:51:27,248 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:51:27,283 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-07-21 23:51:27,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 23:51:27,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:27,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:27,316 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:27,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:27,323 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-07-21 23:51:27,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:27,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137928651] [2020-07-21 23:51:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:27,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:27,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:27,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:51:27,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:28,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:28,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137928651] [2020-07-21 23:51:28,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:28,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:51:28,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329011683] [2020-07-21 23:51:28,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:51:28,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:28,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:51:28,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:51:28,170 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-07-21 23:51:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:28,566 INFO L93 Difference]: Finished difference Result 2321 states and 4130 transitions. [2020-07-21 23:51:28,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:51:28,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-21 23:51:28,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:28,597 INFO L225 Difference]: With dead ends: 2321 [2020-07-21 23:51:28,597 INFO L226 Difference]: Without dead ends: 1537 [2020-07-21 23:51:28,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:51:28,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2020-07-21 23:51:28,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1535. [2020-07-21 23:51:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1535 states. [2020-07-21 23:51:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2380 transitions. [2020-07-21 23:51:28,760 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2380 transitions. Word has length 326 [2020-07-21 23:51:28,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:28,763 INFO L479 AbstractCegarLoop]: Abstraction has 1535 states and 2380 transitions. [2020-07-21 23:51:28,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:51:28,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2380 transitions. [2020-07-21 23:51:28,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 23:51:28,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:28,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:28,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:28,997 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:28,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:28,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1580887409, now seen corresponding path program 1 times [2020-07-21 23:51:28,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:28,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068469720] [2020-07-21 23:51:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:29,318 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:29,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:29,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1441 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:29,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:29,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:29,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068469720] [2020-07-21 23:51:29,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:29,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:29,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250352327] [2020-07-21 23:51:29,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:29,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:29,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:29,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:29,515 INFO L87 Difference]: Start difference. First operand 1535 states and 2380 transitions. Second operand 3 states. [2020-07-21 23:51:29,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:29,707 INFO L93 Difference]: Finished difference Result 4391 states and 6771 transitions. [2020-07-21 23:51:29,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:29,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 23:51:29,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:29,724 INFO L225 Difference]: With dead ends: 4391 [2020-07-21 23:51:29,725 INFO L226 Difference]: Without dead ends: 2996 [2020-07-21 23:51:29,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2020-07-21 23:51:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2994. [2020-07-21 23:51:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2994 states. [2020-07-21 23:51:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 4616 transitions. [2020-07-21 23:51:29,861 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 4616 transitions. Word has length 328 [2020-07-21 23:51:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:29,863 INFO L479 AbstractCegarLoop]: Abstraction has 2994 states and 4616 transitions. [2020-07-21 23:51:29,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:29,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 4616 transitions. [2020-07-21 23:51:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 23:51:29,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:29,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:30,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:30,090 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:30,091 INFO L82 PathProgramCache]: Analyzing trace with hash 651943444, now seen corresponding path program 1 times [2020-07-21 23:51:30,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:30,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65757769] [2020-07-21 23:51:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:30,387 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:30,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:30,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:30,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:30,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:30,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65757769] [2020-07-21 23:51:30,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:30,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:30,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097340284] [2020-07-21 23:51:30,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:30,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:30,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:30,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:30,475 INFO L87 Difference]: Start difference. First operand 2994 states and 4616 transitions. Second operand 3 states. [2020-07-21 23:51:30,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:30,736 INFO L93 Difference]: Finished difference Result 8823 states and 13572 transitions. [2020-07-21 23:51:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:30,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 23:51:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:30,768 INFO L225 Difference]: With dead ends: 8823 [2020-07-21 23:51:30,769 INFO L226 Difference]: Without dead ends: 5856 [2020-07-21 23:51:30,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5856 states. [2020-07-21 23:51:31,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5856 to 3005. [2020-07-21 23:51:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3005 states. [2020-07-21 23:51:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 4631 transitions. [2020-07-21 23:51:31,039 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 4631 transitions. Word has length 328 [2020-07-21 23:51:31,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:31,039 INFO L479 AbstractCegarLoop]: Abstraction has 3005 states and 4631 transitions. [2020-07-21 23:51:31,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:31,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 4631 transitions. [2020-07-21 23:51:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-21 23:51:31,056 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:31,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:31,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:31,273 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:31,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:31,275 INFO L82 PathProgramCache]: Analyzing trace with hash 264505056, now seen corresponding path program 1 times [2020-07-21 23:51:31,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:31,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605492421] [2020-07-21 23:51:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:31,560 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:31,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:31,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:31,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:31,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:31,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605492421] [2020-07-21 23:51:31,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:31,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:31,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517018929] [2020-07-21 23:51:31,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:31,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:31,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:31,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:31,662 INFO L87 Difference]: Start difference. First operand 3005 states and 4631 transitions. Second operand 3 states. [2020-07-21 23:51:31,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:31,968 INFO L93 Difference]: Finished difference Result 8920 states and 13739 transitions. [2020-07-21 23:51:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:31,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-07-21 23:51:31,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:32,007 INFO L225 Difference]: With dead ends: 8920 [2020-07-21 23:51:32,008 INFO L226 Difference]: Without dead ends: 5965 [2020-07-21 23:51:32,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:32,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5965 states. [2020-07-21 23:51:32,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5965 to 3021. [2020-07-21 23:51:32,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3021 states. [2020-07-21 23:51:32,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 4650 transitions. [2020-07-21 23:51:32,297 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 4650 transitions. Word has length 329 [2020-07-21 23:51:32,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:32,298 INFO L479 AbstractCegarLoop]: Abstraction has 3021 states and 4650 transitions. [2020-07-21 23:51:32,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:32,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 4650 transitions. [2020-07-21 23:51:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 23:51:32,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:32,316 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, 1, 1, 1, 1] [2020-07-21 23:51:32,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:32,530 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:32,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:32,531 INFO L82 PathProgramCache]: Analyzing trace with hash 983524362, now seen corresponding path program 1 times [2020-07-21 23:51:32,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:32,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983089218] [2020-07-21 23:51:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:32,832 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:32,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:32,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:51:32,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:32,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:32,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983089218] [2020-07-21 23:51:32,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:32,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:51:32,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035465329] [2020-07-21 23:51:32,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:51:32,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:32,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:51:32,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:51:32,949 INFO L87 Difference]: Start difference. First operand 3021 states and 4650 transitions. Second operand 4 states. [2020-07-21 23:51:33,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:33,231 INFO L93 Difference]: Finished difference Result 6728 states and 10371 transitions. [2020-07-21 23:51:33,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:51:33,232 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 23:51:33,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:33,250 INFO L225 Difference]: With dead ends: 6728 [2020-07-21 23:51:33,250 INFO L226 Difference]: Without dead ends: 3409 [2020-07-21 23:51:33,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:51:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2020-07-21 23:51:33,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 3407. [2020-07-21 23:51:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3407 states. [2020-07-21 23:51:33,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 5223 transitions. [2020-07-21 23:51:33,415 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 5223 transitions. Word has length 330 [2020-07-21 23:51:33,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:33,416 INFO L479 AbstractCegarLoop]: Abstraction has 3407 states and 5223 transitions. [2020-07-21 23:51:33,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:51:33,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 5223 transitions. [2020-07-21 23:51:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 23:51:33,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:33,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:33,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:33,641 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:33,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:33,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1581771825, now seen corresponding path program 1 times [2020-07-21 23:51:33,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:33,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755622161] [2020-07-21 23:51:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:33,937 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:33,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:33,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1451 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:51:33,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:34,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:34,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755622161] [2020-07-21 23:51:34,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:34,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 23:51:34,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472069076] [2020-07-21 23:51:34,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:51:34,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:34,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:51:34,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:51:34,288 INFO L87 Difference]: Start difference. First operand 3407 states and 5223 transitions. Second operand 8 states. [2020-07-21 23:51:36,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:36,027 INFO L93 Difference]: Finished difference Result 7505 states and 11555 transitions. [2020-07-21 23:51:36,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 23:51:36,028 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 331 [2020-07-21 23:51:36,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:36,079 INFO L225 Difference]: With dead ends: 7505 [2020-07-21 23:51:36,079 INFO L226 Difference]: Without dead ends: 5417 [2020-07-21 23:51:36,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 23:51:36,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5417 states. [2020-07-21 23:51:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5417 to 4313. [2020-07-21 23:51:36,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4313 states. [2020-07-21 23:51:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4313 states to 4313 states and 6574 transitions. [2020-07-21 23:51:36,420 INFO L78 Accepts]: Start accepts. Automaton has 4313 states and 6574 transitions. Word has length 331 [2020-07-21 23:51:36,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:36,420 INFO L479 AbstractCegarLoop]: Abstraction has 4313 states and 6574 transitions. [2020-07-21 23:51:36,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:51:36,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4313 states and 6574 transitions. [2020-07-21 23:51:36,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 23:51:36,433 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:36,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:36,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:36,647 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:36,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:36,647 INFO L82 PathProgramCache]: Analyzing trace with hash -930859704, now seen corresponding path program 1 times [2020-07-21 23:51:36,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:36,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424473815] [2020-07-21 23:51:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:36,933 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:36,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:36,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:36,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:37,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:37,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424473815] [2020-07-21 23:51:37,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:37,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:37,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241204853] [2020-07-21 23:51:37,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:37,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:37,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:37,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:37,049 INFO L87 Difference]: Start difference. First operand 4313 states and 6574 transitions. Second operand 3 states. [2020-07-21 23:51:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:37,310 INFO L93 Difference]: Finished difference Result 8198 states and 12525 transitions. [2020-07-21 23:51:37,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:37,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-21 23:51:37,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:37,325 INFO L225 Difference]: With dead ends: 8198 [2020-07-21 23:51:37,325 INFO L226 Difference]: Without dead ends: 5025 [2020-07-21 23:51:37,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:37,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5025 states. [2020-07-21 23:51:37,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5025 to 4657. [2020-07-21 23:51:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4657 states. [2020-07-21 23:51:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 7148 transitions. [2020-07-21 23:51:37,665 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 7148 transitions. Word has length 331 [2020-07-21 23:51:37,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:37,665 INFO L479 AbstractCegarLoop]: Abstraction has 4657 states and 7148 transitions. [2020-07-21 23:51:37,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 7148 transitions. [2020-07-21 23:51:37,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 23:51:37,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:37,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:37,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:37,896 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:37,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:37,897 INFO L82 PathProgramCache]: Analyzing trace with hash 278446020, now seen corresponding path program 1 times [2020-07-21 23:51:37,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:37,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313986284] [2020-07-21 23:51:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:38,182 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:38,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:38,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:38,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:38,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:38,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313986284] [2020-07-21 23:51:38,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:38,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:38,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423395763] [2020-07-21 23:51:38,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:38,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:38,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:38,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:38,290 INFO L87 Difference]: Start difference. First operand 4657 states and 7148 transitions. Second operand 3 states. [2020-07-21 23:51:38,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:38,710 INFO L93 Difference]: Finished difference Result 13562 states and 20769 transitions. [2020-07-21 23:51:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:38,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 23:51:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:38,732 INFO L225 Difference]: With dead ends: 13562 [2020-07-21 23:51:38,733 INFO L226 Difference]: Without dead ends: 9133 [2020-07-21 23:51:38,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9133 states. [2020-07-21 23:51:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9133 to 9131. [2020-07-21 23:51:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9131 states. [2020-07-21 23:51:39,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 13928 transitions. [2020-07-21 23:51:39,177 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 13928 transitions. Word has length 332 [2020-07-21 23:51:39,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:39,177 INFO L479 AbstractCegarLoop]: Abstraction has 9131 states and 13928 transitions. [2020-07-21 23:51:39,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:39,178 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 13928 transitions. [2020-07-21 23:51:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 23:51:39,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:39,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:39,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:39,409 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:39,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2006002937, now seen corresponding path program 1 times [2020-07-21 23:51:39,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:39,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355729270] [2020-07-21 23:51:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:39,647 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:39,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:39,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:51:39,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:39,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:39,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355729270] [2020-07-21 23:51:39,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:39,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:51:39,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359071169] [2020-07-21 23:51:39,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:51:39,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:39,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:51:39,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:51:39,739 INFO L87 Difference]: Start difference. First operand 9131 states and 13928 transitions. Second operand 4 states. [2020-07-21 23:51:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:40,529 INFO L93 Difference]: Finished difference Result 26149 states and 39691 transitions. [2020-07-21 23:51:40,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:51:40,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 23:51:40,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:40,573 INFO L225 Difference]: With dead ends: 26149 [2020-07-21 23:51:40,573 INFO L226 Difference]: Without dead ends: 17803 [2020-07-21 23:51:40,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:51:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17803 states. [2020-07-21 23:51:41,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17803 to 9706. [2020-07-21 23:51:41,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9706 states. [2020-07-21 23:51:41,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 14897 transitions. [2020-07-21 23:51:41,304 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 14897 transitions. Word has length 332 [2020-07-21 23:51:41,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:41,304 INFO L479 AbstractCegarLoop]: Abstraction has 9706 states and 14897 transitions. [2020-07-21 23:51:41,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:51:41,305 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 14897 transitions. [2020-07-21 23:51:41,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 23:51:41,319 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:41,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:41,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:41,533 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:41,533 INFO L82 PathProgramCache]: Analyzing trace with hash -715872974, now seen corresponding path program 1 times [2020-07-21 23:51:41,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:41,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413729975] [2020-07-21 23:51:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:41,780 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:41,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:41,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:41,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:41,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:41,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413729975] [2020-07-21 23:51:41,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:41,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:41,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929700867] [2020-07-21 23:51:41,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:41,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:41,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:41,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:41,857 INFO L87 Difference]: Start difference. First operand 9706 states and 14897 transitions. Second operand 3 states. [2020-07-21 23:51:42,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:42,538 INFO L93 Difference]: Finished difference Result 28547 states and 43767 transitions. [2020-07-21 23:51:42,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:42,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 23:51:42,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:42,577 INFO L225 Difference]: With dead ends: 28547 [2020-07-21 23:51:42,577 INFO L226 Difference]: Without dead ends: 19157 [2020-07-21 23:51:42,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:42,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19157 states. [2020-07-21 23:51:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19157 to 9803. [2020-07-21 23:51:43,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9803 states. [2020-07-21 23:51:43,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9803 states to 9803 states and 15022 transitions. [2020-07-21 23:51:43,222 INFO L78 Accepts]: Start accepts. Automaton has 9803 states and 15022 transitions. Word has length 332 [2020-07-21 23:51:43,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:43,223 INFO L479 AbstractCegarLoop]: Abstraction has 9803 states and 15022 transitions. [2020-07-21 23:51:43,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 9803 states and 15022 transitions. [2020-07-21 23:51:43,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 23:51:43,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:43,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:43,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:43,449 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:43,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:43,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1929994812, now seen corresponding path program 1 times [2020-07-21 23:51:43,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:43,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991014176] [2020-07-21 23:51:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:43,686 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:43,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:43,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:43,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:43,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:43,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991014176] [2020-07-21 23:51:43,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:43,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:43,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948292267] [2020-07-21 23:51:43,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:43,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:43,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:43,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:43,760 INFO L87 Difference]: Start difference. First operand 9803 states and 15022 transitions. Second operand 3 states. [2020-07-21 23:51:44,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:44,824 INFO L93 Difference]: Finished difference Result 28604 states and 43815 transitions. [2020-07-21 23:51:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:44,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 23:51:44,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:44,863 INFO L225 Difference]: With dead ends: 28604 [2020-07-21 23:51:44,863 INFO L226 Difference]: Without dead ends: 19230 [2020-07-21 23:51:44,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19230 states. [2020-07-21 23:51:45,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19230 to 9904. [2020-07-21 23:51:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9904 states. [2020-07-21 23:51:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9904 states to 9904 states and 15137 transitions. [2020-07-21 23:51:45,439 INFO L78 Accepts]: Start accepts. Automaton has 9904 states and 15137 transitions. Word has length 333 [2020-07-21 23:51:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:45,439 INFO L479 AbstractCegarLoop]: Abstraction has 9904 states and 15137 transitions. [2020-07-21 23:51:45,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 9904 states and 15137 transitions. [2020-07-21 23:51:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 23:51:45,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:45,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:45,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:45,665 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:45,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:45,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1529189778, now seen corresponding path program 1 times [2020-07-21 23:51:45,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:45,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329935972] [2020-07-21 23:51:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:46,046 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:46,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:46,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:51:46,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:46,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:46,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329935972] [2020-07-21 23:51:46,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:46,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:51:46,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110483440] [2020-07-21 23:51:46,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:51:46,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:46,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:51:46,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:51:46,119 INFO L87 Difference]: Start difference. First operand 9904 states and 15137 transitions. Second operand 4 states. [2020-07-21 23:51:46,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:46,649 INFO L93 Difference]: Finished difference Result 21613 states and 32893 transitions. [2020-07-21 23:51:46,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:51:46,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 23:51:46,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:46,672 INFO L225 Difference]: With dead ends: 21613 [2020-07-21 23:51:46,673 INFO L226 Difference]: Without dead ends: 11415 [2020-07-21 23:51:46,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:51:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11415 states. [2020-07-21 23:51:47,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11415 to 11413. [2020-07-21 23:51:47,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11413 states. [2020-07-21 23:51:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11413 states to 11413 states and 17274 transitions. [2020-07-21 23:51:47,360 INFO L78 Accepts]: Start accepts. Automaton has 11413 states and 17274 transitions. Word has length 334 [2020-07-21 23:51:47,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:47,361 INFO L479 AbstractCegarLoop]: Abstraction has 11413 states and 17274 transitions. [2020-07-21 23:51:47,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:51:47,361 INFO L276 IsEmpty]: Start isEmpty. Operand 11413 states and 17274 transitions. [2020-07-21 23:51:47,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 23:51:47,372 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:47,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:47,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:47,574 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:47,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:47,574 INFO L82 PathProgramCache]: Analyzing trace with hash -90548612, now seen corresponding path program 1 times [2020-07-21 23:51:47,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:47,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312356267] [2020-07-21 23:51:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:47,824 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:47,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:47,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:47,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:47,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:47,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312356267] [2020-07-21 23:51:47,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:47,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:47,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214629471] [2020-07-21 23:51:47,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:47,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:47,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:47,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:47,913 INFO L87 Difference]: Start difference. First operand 11413 states and 17274 transitions. Second operand 3 states. [2020-07-21 23:51:49,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:49,186 INFO L93 Difference]: Finished difference Result 31171 states and 47000 transitions. [2020-07-21 23:51:49,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:49,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 23:51:49,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:49,214 INFO L225 Difference]: With dead ends: 31171 [2020-07-21 23:51:49,214 INFO L226 Difference]: Without dead ends: 20158 [2020-07-21 23:51:49,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:49,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20158 states. [2020-07-21 23:51:49,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20158 to 10983. [2020-07-21 23:51:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10983 states. [2020-07-21 23:51:49,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10983 states to 10983 states and 16596 transitions. [2020-07-21 23:51:49,955 INFO L78 Accepts]: Start accepts. Automaton has 10983 states and 16596 transitions. Word has length 334 [2020-07-21 23:51:49,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:49,956 INFO L479 AbstractCegarLoop]: Abstraction has 10983 states and 16596 transitions. [2020-07-21 23:51:49,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 10983 states and 16596 transitions. [2020-07-21 23:51:49,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 23:51:49,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:49,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:50,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:50,175 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:50,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:50,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2142282241, now seen corresponding path program 1 times [2020-07-21 23:51:50,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:50,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769292997] [2020-07-21 23:51:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:50,417 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:50,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:50,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:51:50,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:50,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:50,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769292997] [2020-07-21 23:51:50,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:50,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:51:50,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846687531] [2020-07-21 23:51:50,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:51:50,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:50,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:51:50,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:51:50,500 INFO L87 Difference]: Start difference. First operand 10983 states and 16596 transitions. Second operand 4 states. [2020-07-21 23:51:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:51,397 INFO L93 Difference]: Finished difference Result 30595 states and 46001 transitions. [2020-07-21 23:51:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:51:51,398 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 23:51:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:51,418 INFO L225 Difference]: With dead ends: 30595 [2020-07-21 23:51:51,418 INFO L226 Difference]: Without dead ends: 21100 [2020-07-21 23:51:51,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:51:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21100 states. [2020-07-21 23:51:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21100 to 12090. [2020-07-21 23:51:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12090 states. [2020-07-21 23:51:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12090 states to 12090 states and 18305 transitions. [2020-07-21 23:51:51,992 INFO L78 Accepts]: Start accepts. Automaton has 12090 states and 18305 transitions. Word has length 334 [2020-07-21 23:51:51,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:51,992 INFO L479 AbstractCegarLoop]: Abstraction has 12090 states and 18305 transitions. [2020-07-21 23:51:51,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:51:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand 12090 states and 18305 transitions. [2020-07-21 23:51:52,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 23:51:52,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:52,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:52,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:52,205 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:52,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:52,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1787324884, now seen corresponding path program 1 times [2020-07-21 23:51:52,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:52,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398780919] [2020-07-21 23:51:52,207 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:52,488 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:52,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:52,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:51:52,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:52,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:52,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398780919] [2020-07-21 23:51:52,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:52,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:51:52,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000821150] [2020-07-21 23:51:52,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:51:52,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:52,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:51:52,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:51:52,631 INFO L87 Difference]: Start difference. First operand 12090 states and 18305 transitions. Second operand 5 states. [2020-07-21 23:51:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:53,790 INFO L93 Difference]: Finished difference Result 19283 states and 29144 transitions. [2020-07-21 23:51:53,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:51:53,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-07-21 23:51:53,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:53,802 INFO L225 Difference]: With dead ends: 19283 [2020-07-21 23:51:53,802 INFO L226 Difference]: Without dead ends: 12090 [2020-07-21 23:51:53,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:51:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12090 states. [2020-07-21 23:51:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12090 to 12090. [2020-07-21 23:51:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12090 states. [2020-07-21 23:51:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12090 states to 12090 states and 18200 transitions. [2020-07-21 23:51:54,316 INFO L78 Accepts]: Start accepts. Automaton has 12090 states and 18200 transitions. Word has length 334 [2020-07-21 23:51:54,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:54,316 INFO L479 AbstractCegarLoop]: Abstraction has 12090 states and 18200 transitions. [2020-07-21 23:51:54,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:51:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 12090 states and 18200 transitions. [2020-07-21 23:51:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 23:51:54,325 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:54,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:54,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:54,526 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:54,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:54,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1307257849, now seen corresponding path program 1 times [2020-07-21 23:51:54,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:54,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203050242] [2020-07-21 23:51:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:54,818 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:54,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:54,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 1455 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:51:54,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:54,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:54,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203050242] [2020-07-21 23:51:54,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:54,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:51:54,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851047712] [2020-07-21 23:51:54,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:51:54,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:54,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:51:54,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:51:54,929 INFO L87 Difference]: Start difference. First operand 12090 states and 18200 transitions. Second operand 4 states. [2020-07-21 23:51:56,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:56,070 INFO L93 Difference]: Finished difference Result 34090 states and 51229 transitions. [2020-07-21 23:51:56,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:51:56,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 23:51:56,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:56,092 INFO L225 Difference]: With dead ends: 34090 [2020-07-21 23:51:56,092 INFO L226 Difference]: Without dead ends: 22443 [2020-07-21 23:51:56,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:51:56,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22443 states. [2020-07-21 23:51:57,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22443 to 22441. [2020-07-21 23:51:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22441 states. [2020-07-21 23:51:57,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22441 states to 22441 states and 33521 transitions. [2020-07-21 23:51:57,121 INFO L78 Accepts]: Start accepts. Automaton has 22441 states and 33521 transitions. Word has length 334 [2020-07-21 23:51:57,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:57,122 INFO L479 AbstractCegarLoop]: Abstraction has 22441 states and 33521 transitions. [2020-07-21 23:51:57,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:51:57,122 INFO L276 IsEmpty]: Start isEmpty. Operand 22441 states and 33521 transitions. [2020-07-21 23:51:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 23:51:57,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:57,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:57,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:57,354 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:57,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:57,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1890464301, now seen corresponding path program 1 times [2020-07-21 23:51:57,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:57,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593182243] [2020-07-21 23:51:57,356 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:57,641 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:51:57,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:57,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1179 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:57,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:51:58,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:58,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593182243] [2020-07-21 23:51:58,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:58,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:58,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310448623] [2020-07-21 23:51:58,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:58,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:58,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:58,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:58,301 INFO L87 Difference]: Start difference. First operand 22441 states and 33521 transitions. Second operand 3 states. [2020-07-21 23:52:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:00,150 INFO L93 Difference]: Finished difference Result 59208 states and 87741 transitions. [2020-07-21 23:52:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:00,150 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 23:52:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:00,188 INFO L225 Difference]: With dead ends: 59208 [2020-07-21 23:52:00,188 INFO L226 Difference]: Without dead ends: 40713 [2020-07-21 23:52:00,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40713 states. [2020-07-21 23:52:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40713 to 22972. [2020-07-21 23:52:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22972 states. [2020-07-21 23:52:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22972 states to 22972 states and 34114 transitions. [2020-07-21 23:52:01,363 INFO L78 Accepts]: Start accepts. Automaton has 22972 states and 34114 transitions. Word has length 336 [2020-07-21 23:52:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:01,363 INFO L479 AbstractCegarLoop]: Abstraction has 22972 states and 34114 transitions. [2020-07-21 23:52:01,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 22972 states and 34114 transitions. [2020-07-21 23:52:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 23:52:01,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:01,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:52:01,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:01,597 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:01,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:01,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1758017442, now seen corresponding path program 1 times [2020-07-21 23:52:01,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:01,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803851420] [2020-07-21 23:52:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:01,881 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:52:01,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:01,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:01,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:52:01,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:01,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803851420] [2020-07-21 23:52:01,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:01,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:01,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571520737] [2020-07-21 23:52:01,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:01,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:01,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:01,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:01,985 INFO L87 Difference]: Start difference. First operand 22972 states and 34114 transitions. Second operand 3 states. [2020-07-21 23:52:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:04,210 INFO L93 Difference]: Finished difference Result 62963 states and 93049 transitions. [2020-07-21 23:52:04,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:04,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 23:52:04,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:04,256 INFO L225 Difference]: With dead ends: 62963 [2020-07-21 23:52:04,257 INFO L226 Difference]: Without dead ends: 43825 [2020-07-21 23:52:04,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43825 states. [2020-07-21 23:52:06,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43825 to 43810. [2020-07-21 23:52:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43810 states. [2020-07-21 23:52:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43810 states to 43810 states and 64471 transitions. [2020-07-21 23:52:06,593 INFO L78 Accepts]: Start accepts. Automaton has 43810 states and 64471 transitions. Word has length 336 [2020-07-21 23:52:06,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:06,594 INFO L479 AbstractCegarLoop]: Abstraction has 43810 states and 64471 transitions. [2020-07-21 23:52:06,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 43810 states and 64471 transitions. [2020-07-21 23:52:06,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 23:52:06,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:06,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:52:06,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:06,850 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:06,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:06,851 INFO L82 PathProgramCache]: Analyzing trace with hash -761734797, now seen corresponding path program 1 times [2020-07-21 23:52:06,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:06,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897916203] [2020-07-21 23:52:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:07,102 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:07,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:07,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:52:07,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:52:07,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:07,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897916203] [2020-07-21 23:52:07,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:07,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:52:07,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956715070] [2020-07-21 23:52:07,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:52:07,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:07,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:52:07,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:52:07,166 INFO L87 Difference]: Start difference. First operand 43810 states and 64471 transitions. Second operand 4 states. [2020-07-21 23:52:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:11,933 INFO L93 Difference]: Finished difference Result 116136 states and 170412 transitions. [2020-07-21 23:52:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:52:11,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-21 23:52:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:12,013 INFO L225 Difference]: With dead ends: 116136 [2020-07-21 23:52:12,014 INFO L226 Difference]: Without dead ends: 79606 [2020-07-21 23:52:12,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:52:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79606 states. [2020-07-21 23:52:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79606 to 46674. [2020-07-21 23:52:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46674 states. [2020-07-21 23:52:14,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46674 states to 46674 states and 68934 transitions. [2020-07-21 23:52:14,881 INFO L78 Accepts]: Start accepts. Automaton has 46674 states and 68934 transitions. Word has length 337 [2020-07-21 23:52:14,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:14,882 INFO L479 AbstractCegarLoop]: Abstraction has 46674 states and 68934 transitions. [2020-07-21 23:52:14,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:52:14,882 INFO L276 IsEmpty]: Start isEmpty. Operand 46674 states and 68934 transitions. [2020-07-21 23:52:14,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 23:52:14,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:14,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:52:15,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:15,113 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:15,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:15,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2134426083, now seen corresponding path program 1 times [2020-07-21 23:52:15,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:15,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230326018] [2020-07-21 23:52:15,114 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:15,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:15,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:15,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:52:15,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:52:15,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:15,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230326018] [2020-07-21 23:52:15,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:15,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:52:15,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806980511] [2020-07-21 23:52:15,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:52:15,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:15,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:52:15,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:52:15,423 INFO L87 Difference]: Start difference. First operand 46674 states and 68934 transitions. Second operand 4 states. [2020-07-21 23:52:18,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:18,862 INFO L93 Difference]: Finished difference Result 82333 states and 121001 transitions. [2020-07-21 23:52:18,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:52:18,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 23:52:18,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:18,930 INFO L225 Difference]: With dead ends: 82333 [2020-07-21 23:52:18,931 INFO L226 Difference]: Without dead ends: 43098 [2020-07-21 23:52:18,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:52:19,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43098 states. [2020-07-21 23:52:21,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43098 to 42823. [2020-07-21 23:52:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42823 states. [2020-07-21 23:52:22,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42823 states to 42823 states and 63161 transitions. [2020-07-21 23:52:22,001 INFO L78 Accepts]: Start accepts. Automaton has 42823 states and 63161 transitions. Word has length 338 [2020-07-21 23:52:22,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:22,002 INFO L479 AbstractCegarLoop]: Abstraction has 42823 states and 63161 transitions. [2020-07-21 23:52:22,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:52:22,002 INFO L276 IsEmpty]: Start isEmpty. Operand 42823 states and 63161 transitions. [2020-07-21 23:52:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 23:52:22,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:22,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:52:22,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:22,228 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:22,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:22,229 INFO L82 PathProgramCache]: Analyzing trace with hash -287963811, now seen corresponding path program 1 times [2020-07-21 23:52:22,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:22,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629625075] [2020-07-21 23:52:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:22,477 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:22,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:22,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:52:22,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:52:22,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:22,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629625075] [2020-07-21 23:52:22,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:22,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:52:22,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506728658] [2020-07-21 23:52:22,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:52:22,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:22,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:52:22,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:52:22,536 INFO L87 Difference]: Start difference. First operand 42823 states and 63161 transitions. Second operand 4 states. [2020-07-21 23:52:25,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:25,437 INFO L93 Difference]: Finished difference Result 92655 states and 136230 transitions. [2020-07-21 23:52:25,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:52:25,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 23:52:25,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:25,489 INFO L225 Difference]: With dead ends: 92655 [2020-07-21 23:52:25,489 INFO L226 Difference]: Without dead ends: 47784 [2020-07-21 23:52:25,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:52:25,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47784 states. [2020-07-21 23:52:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47784 to 47732. [2020-07-21 23:52:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47732 states. [2020-07-21 23:52:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47732 states to 47732 states and 69922 transitions. [2020-07-21 23:52:29,489 INFO L78 Accepts]: Start accepts. Automaton has 47732 states and 69922 transitions. Word has length 338 [2020-07-21 23:52:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:29,490 INFO L479 AbstractCegarLoop]: Abstraction has 47732 states and 69922 transitions. [2020-07-21 23:52:29,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:52:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 47732 states and 69922 transitions. [2020-07-21 23:52:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 23:52:29,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:29,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:52:29,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:29,725 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:29,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:29,726 INFO L82 PathProgramCache]: Analyzing trace with hash 171697726, now seen corresponding path program 1 times [2020-07-21 23:52:29,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:29,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427297760] [2020-07-21 23:52:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:30,011 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:52:30,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:30,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1457 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:30,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:52:30,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:30,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427297760] [2020-07-21 23:52:30,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:30,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:30,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672696761] [2020-07-21 23:52:30,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:30,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:30,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:30,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:30,101 INFO L87 Difference]: Start difference. First operand 47732 states and 69922 transitions. Second operand 3 states. [2020-07-21 23:52:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:34,880 INFO L93 Difference]: Finished difference Result 121373 states and 176022 transitions. [2020-07-21 23:52:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:34,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-21 23:52:34,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:34,972 INFO L225 Difference]: With dead ends: 121373 [2020-07-21 23:52:34,973 INFO L226 Difference]: Without dead ends: 85911 [2020-07-21 23:52:35,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:35,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85911 states. [2020-07-21 23:52:41,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85911 to 85573. [2020-07-21 23:52:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85573 states. [2020-07-21 23:52:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85573 states to 85573 states and 124370 transitions. [2020-07-21 23:52:41,967 INFO L78 Accepts]: Start accepts. Automaton has 85573 states and 124370 transitions. Word has length 339 [2020-07-21 23:52:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:41,967 INFO L479 AbstractCegarLoop]: Abstraction has 85573 states and 124370 transitions. [2020-07-21 23:52:41,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 85573 states and 124370 transitions. [2020-07-21 23:52:42,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 23:52:42,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:42,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:52:42,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:42,223 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:42,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:42,224 INFO L82 PathProgramCache]: Analyzing trace with hash -674892714, now seen corresponding path program 1 times [2020-07-21 23:52:42,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:42,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002295560] [2020-07-21 23:52:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:42,474 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:42,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:42,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:42,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:52:42,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:42,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002295560] [2020-07-21 23:52:42,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:42,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:42,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237414570] [2020-07-21 23:52:42,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:42,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:42,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:42,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:42,538 INFO L87 Difference]: Start difference. First operand 85573 states and 124370 transitions. Second operand 3 states. [2020-07-21 23:52:48,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:52:48,739 INFO L93 Difference]: Finished difference Result 139259 states and 201978 transitions. [2020-07-21 23:52:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:52:48,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-21 23:52:48,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:52:48,861 INFO L225 Difference]: With dead ends: 139259 [2020-07-21 23:52:48,861 INFO L226 Difference]: Without dead ends: 110879 [2020-07-21 23:52:48,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:48,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110879 states. [2020-07-21 23:52:56,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110879 to 85573. [2020-07-21 23:52:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85573 states. [2020-07-21 23:52:56,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85573 states to 85573 states and 124329 transitions. [2020-07-21 23:52:56,431 INFO L78 Accepts]: Start accepts. Automaton has 85573 states and 124329 transitions. Word has length 341 [2020-07-21 23:52:56,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:56,431 INFO L479 AbstractCegarLoop]: Abstraction has 85573 states and 124329 transitions. [2020-07-21 23:52:56,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:56,432 INFO L276 IsEmpty]: Start isEmpty. Operand 85573 states and 124329 transitions. [2020-07-21 23:52:56,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 23:52:56,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:56,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:52:56,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:56,692 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:56,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:56,693 INFO L82 PathProgramCache]: Analyzing trace with hash -969394092, now seen corresponding path program 1 times [2020-07-21 23:52:56,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:56,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985798559] [2020-07-21 23:52:56,694 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:56,985 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:52:56,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:56,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 1464 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:52:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:52:57,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:57,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985798559] [2020-07-21 23:52:57,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:57,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:52:57,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376228684] [2020-07-21 23:52:57,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:52:57,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:57,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:52:57,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:52:57,091 INFO L87 Difference]: Start difference. First operand 85573 states and 124329 transitions. Second operand 4 states. [2020-07-21 23:53:07,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:07,161 INFO L93 Difference]: Finished difference Result 250079 states and 362469 transitions. [2020-07-21 23:53:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:53:07,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 342 [2020-07-21 23:53:07,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:07,351 INFO L225 Difference]: With dead ends: 250079 [2020-07-21 23:53:07,351 INFO L226 Difference]: Without dead ends: 165878 [2020-07-21 23:53:07,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:53:07,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165878 states. [2020-07-21 23:53:20,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165878 to 165876. [2020-07-21 23:53:20,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165876 states. [2020-07-21 23:53:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165876 states to 165876 states and 238646 transitions. [2020-07-21 23:53:20,948 INFO L78 Accepts]: Start accepts. Automaton has 165876 states and 238646 transitions. Word has length 342 [2020-07-21 23:53:20,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:20,948 INFO L479 AbstractCegarLoop]: Abstraction has 165876 states and 238646 transitions. [2020-07-21 23:53:20,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:53:20,948 INFO L276 IsEmpty]: Start isEmpty. Operand 165876 states and 238646 transitions. [2020-07-21 23:53:21,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 23:53:21,063 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:21,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:21,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:21,265 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:21,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:21,265 INFO L82 PathProgramCache]: Analyzing trace with hash -927427213, now seen corresponding path program 1 times [2020-07-21 23:53:21,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:21,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439364878] [2020-07-21 23:53:21,266 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:21,513 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:53:21,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:21,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:53:21,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:53:21,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:21,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439364878] [2020-07-21 23:53:21,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:21,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:53:21,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283241030] [2020-07-21 23:53:21,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:53:21,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:21,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:53:21,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:21,572 INFO L87 Difference]: Start difference. First operand 165876 states and 238646 transitions. Second operand 3 states. [2020-07-21 23:53:41,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:41,183 INFO L93 Difference]: Finished difference Result 408369 states and 585500 transitions. [2020-07-21 23:53:41,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:53:41,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 23:53:41,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:41,514 INFO L225 Difference]: With dead ends: 408369 [2020-07-21 23:53:41,515 INFO L226 Difference]: Without dead ends: 264298 [2020-07-21 23:53:41,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:41,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264298 states. [2020-07-21 23:53:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264298 to 167358. [2020-07-21 23:53:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167358 states. [2020-07-21 23:53:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167358 states to 167358 states and 240090 transitions. [2020-07-21 23:53:58,369 INFO L78 Accepts]: Start accepts. Automaton has 167358 states and 240090 transitions. Word has length 342 [2020-07-21 23:53:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:58,369 INFO L479 AbstractCegarLoop]: Abstraction has 167358 states and 240090 transitions. [2020-07-21 23:53:58,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:53:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 167358 states and 240090 transitions. [2020-07-21 23:53:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 23:53:58,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:58,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:58,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:58,693 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:58,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:58,694 INFO L82 PathProgramCache]: Analyzing trace with hash 875447590, now seen corresponding path program 1 times [2020-07-21 23:53:58,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:58,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024158824] [2020-07-21 23:53:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:58,980 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:53:58,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:58,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 1459 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:53:58,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:53:59,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:59,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024158824] [2020-07-21 23:53:59,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:59,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:53:59,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311810003] [2020-07-21 23:53:59,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:53:59,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:59,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:53:59,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:59,116 INFO L87 Difference]: Start difference. First operand 167358 states and 240090 transitions. Second operand 3 states. [2020-07-21 23:54:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:54:22,632 INFO L93 Difference]: Finished difference Result 473507 states and 677067 transitions. [2020-07-21 23:54:22,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:54:22,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2020-07-21 23:54:22,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:54:23,097 INFO L225 Difference]: With dead ends: 473507 [2020-07-21 23:54:23,097 INFO L226 Difference]: Without dead ends: 324321 [2020-07-21 23:54:23,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:54:23,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324321 states. [2020-07-21 23:54:51,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324321 to 324319. [2020-07-21 23:54:51,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324319 states. [2020-07-21 23:54:52,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324319 states to 324319 states and 462090 transitions. [2020-07-21 23:54:52,390 INFO L78 Accepts]: Start accepts. Automaton has 324319 states and 462090 transitions. Word has length 343 [2020-07-21 23:54:52,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:54:52,391 INFO L479 AbstractCegarLoop]: Abstraction has 324319 states and 462090 transitions. [2020-07-21 23:54:52,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:54:52,391 INFO L276 IsEmpty]: Start isEmpty. Operand 324319 states and 462090 transitions. [2020-07-21 23:54:52,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-21 23:54:52,639 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:54:52,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:54:52,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:52,840 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:54:52,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:54:52,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1428825589, now seen corresponding path program 1 times [2020-07-21 23:54:52,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:54:52,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990215357] [2020-07-21 23:54:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:54:53,097 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:54:53,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:54:53,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:54:53,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:54:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:54:53,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:54:53,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990215357] [2020-07-21 23:54:53,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:54:53,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:54:53,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287613623] [2020-07-21 23:54:53,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:54:53,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:54:53,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:54:53,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:54:53,659 INFO L87 Difference]: Start difference. First operand 324319 states and 462090 transitions. Second operand 4 states. [2020-07-21 23:55:45,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:55:45,456 INFO L93 Difference]: Finished difference Result 899889 states and 1278148 transitions. [2020-07-21 23:55:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:55:45,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-21 23:55:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:55:46,354 INFO L225 Difference]: With dead ends: 899889 [2020-07-21 23:55:46,354 INFO L226 Difference]: Without dead ends: 624816 [2020-07-21 23:55:46,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:55:47,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624816 states. [2020-07-21 23:56:22,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624816 to 366420. [2020-07-21 23:56:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366420 states. [2020-07-21 23:56:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366420 states to 366420 states and 524188 transitions. [2020-07-21 23:56:22,739 INFO L78 Accepts]: Start accepts. Automaton has 366420 states and 524188 transitions. Word has length 344 [2020-07-21 23:56:22,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:56:22,739 INFO L479 AbstractCegarLoop]: Abstraction has 366420 states and 524188 transitions. [2020-07-21 23:56:22,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:56:22,739 INFO L276 IsEmpty]: Start isEmpty. Operand 366420 states and 524188 transitions. [2020-07-21 23:56:23,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-21 23:56:23,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:56:23,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:56:23,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:23,269 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:56:23,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:56:23,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2132878298, now seen corresponding path program 1 times [2020-07-21 23:56:23,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:56:23,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261226148] [2020-07-21 23:56:23,271 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:56:23,561 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:56:23,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:56:23,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1453 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:56:23,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:56:23,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:56:23,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:56:23,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261226148] [2020-07-21 23:56:23,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:56:23,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:56:23,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794238975] [2020-07-21 23:56:23,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:56:23,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:56:23,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:56:23,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:56:23,702 INFO L87 Difference]: Start difference. First operand 366420 states and 524188 transitions. Second operand 3 states. [2020-07-21 23:57:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:57:18,782 INFO L93 Difference]: Finished difference Result 1013874 states and 1443541 transitions. [2020-07-21 23:57:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:57:18,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 344 [2020-07-21 23:57:18,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:57:20,259 INFO L225 Difference]: With dead ends: 1013874 [2020-07-21 23:57:20,259 INFO L226 Difference]: Without dead ends: 703471 [2020-07-21 23:57:20,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:57:21,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703471 states. [2020-07-21 23:58:32,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703471 to 703469. [2020-07-21 23:58:32,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703469 states. [2020-07-21 23:58:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703469 states to 703469 states and 997354 transitions. [2020-07-21 23:58:33,338 INFO L78 Accepts]: Start accepts. Automaton has 703469 states and 997354 transitions. Word has length 344 [2020-07-21 23:58:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:58:33,338 INFO L479 AbstractCegarLoop]: Abstraction has 703469 states and 997354 transitions. [2020-07-21 23:58:33,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:58:33,339 INFO L276 IsEmpty]: Start isEmpty. Operand 703469 states and 997354 transitions. [2020-07-21 23:58:43,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-21 23:58:43,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:58:43,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:58:43,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:58:43,665 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:58:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:58:43,666 INFO L82 PathProgramCache]: Analyzing trace with hash -605983812, now seen corresponding path program 1 times [2020-07-21 23:58:43,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:58:43,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306751424] [2020-07-21 23:58:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:58:43,913 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:58:43,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:58:43,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:58:43,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:58:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:58:43,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:58:44,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306751424] [2020-07-21 23:58:44,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:58:44,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:58:44,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710661852] [2020-07-21 23:58:44,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:58:44,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:58:44,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:58:44,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:58:44,002 INFO L87 Difference]: Start difference. First operand 703469 states and 997354 transitions. Second operand 3 states. [2020-07-22 00:00:30,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-22 00:00:30,642 INFO L93 Difference]: Finished difference Result 1781405 states and 2503505 transitions. [2020-07-22 00:00:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-22 00:00:30,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 346 [2020-07-22 00:00:30,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-22 00:00:32,484 INFO L225 Difference]: With dead ends: 1781405 [2020-07-22 00:00:32,485 INFO L226 Difference]: Without dead ends: 1245521 [2020-07-22 00:00:33,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:00:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245521 states. [2020-07-22 00:02:02,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245521 to 719386. [2020-07-22 00:02:02,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 719386 states. [2020-07-22 00:02:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719386 states to 719386 states and 1018961 transitions. [2020-07-22 00:02:04,130 INFO L78 Accepts]: Start accepts. Automaton has 719386 states and 1018961 transitions. Word has length 346 [2020-07-22 00:02:04,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-22 00:02:04,130 INFO L479 AbstractCegarLoop]: Abstraction has 719386 states and 1018961 transitions. [2020-07-22 00:02:04,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-22 00:02:04,130 INFO L276 IsEmpty]: Start isEmpty. Operand 719386 states and 1018961 transitions. [2020-07-22 00:02:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-07-22 00:02:04,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-22 00:02:04,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-22 00:02:05,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:02:05,027 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-22 00:02:05,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-22 00:02:05,028 INFO L82 PathProgramCache]: Analyzing trace with hash 799216968, now seen corresponding path program 1 times [2020-07-22 00:02:05,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-22 00:02:05,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787655376] [2020-07-22 00:02:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-22 00:02:05,268 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-22 00:02:05,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-22 00:02:05,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-22 00:02:05,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-22 00:02:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-22 00:02:05,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-22 00:02:05,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787655376] [2020-07-22 00:02:05,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-22 00:02:05,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-22 00:02:05,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382676176] [2020-07-22 00:02:05,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-22 00:02:05,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-22 00:02:05,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-22 00:02:05,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-22 00:02:05,333 INFO L87 Difference]: Start difference. First operand 719386 states and 1018961 transitions. Second operand 3 states.