/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 DAGSIZE --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 [2020-07-20 23:04:47,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 23:04:47,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 23:04:47,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 23:04:47,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 23:04:47,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 23:04:47,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 23:04:47,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 23:04:47,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 23:04:47,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 23:04:47,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 23:04:47,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 23:04:47,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 23:04:47,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 23:04:47,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 23:04:47,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 23:04:47,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 23:04:47,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 23:04:47,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 23:04:47,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 23:04:47,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 23:04:47,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 23:04:47,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 23:04:47,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 23:04:47,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 23:04:47,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 23:04:47,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 23:04:47,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 23:04:47,155 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 23:04:47,169 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 23:04:47,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 23:04:47,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 23:04:47,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 23:04:47,171 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 23:04:47,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 23:04:47,171 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 23:04:47,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 23:04:47,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 23:04:47,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 23:04:47,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 23:04:47,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 23:04:47,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 23:04:47,172 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 23:04:47,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 23:04:47,173 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 23:04:47,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 23:04:47,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 23:04:47,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 23:04:47,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 23:04:47,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 23:04:47,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 23:04:47,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 23:04:47,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 23:04:47,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 23:04:47,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 23:04:47,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:47,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 23:04:47,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 23:04:47,175 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 -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 23:04:47,464 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 23:04:47,484 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 23:04:47,487 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 23:04:47,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 23:04:47,491 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 23:04:47,493 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 23:04:47,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b11c056c/ea5698610d854e448b2156cb9453a9ab/FLAG5cb8cab30 [2020-07-20 23:04:48,267 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 23:04:48,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 23:04:48,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b11c056c/ea5698610d854e448b2156cb9453a9ab/FLAG5cb8cab30 [2020-07-20 23:04:48,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b11c056c/ea5698610d854e448b2156cb9453a9ab [2020-07-20 23:04:48,440 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 23:04:48,444 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 23:04:48,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 23:04:48,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 23:04:48,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 23:04:48,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:04:48" (1/1) ... [2020-07-20 23:04:48,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d780c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:48, skipping insertion in model container [2020-07-20 23:04:48,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:04:48" (1/1) ... [2020-07-20 23:04:48,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 23:04:48,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 23:04:49,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:04:49,520 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 23:04:50,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:04:50,220 INFO L208 MainTranslator]: Completed translation [2020-07-20 23:04:50,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:50 WrapperNode [2020-07-20 23:04:50,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 23:04:50,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 23:04:50,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 23:04:50,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 23:04:50,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:50" (1/1) ... [2020-07-20 23:04:50,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:50" (1/1) ... [2020-07-20 23:04:50,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:50" (1/1) ... [2020-07-20 23:04:50,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:50" (1/1) ... [2020-07-20 23:04:50,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:50" (1/1) ... [2020-07-20 23:04:50,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:50" (1/1) ... [2020-07-20 23:04:50,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:50" (1/1) ... [2020-07-20 23:04:50,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 23:04:50,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 23:04:50,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 23:04:50,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 23:04:50,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 23:04:50,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 23:04:50,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 23:04:50,510 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 23:04:50,510 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 23:04:50,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 23:04:50,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 23:04:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 23:04:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 23:04:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 23:04:50,513 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 23:04:50,513 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 23:04:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 23:04:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 23:04:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 23:04:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 23:04:50,515 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 23:04:50,516 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 23:04:50,516 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 23:04:50,516 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 23:04:50,516 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 23:04:50,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 23:04:50,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 23:04:53,330 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 23:04:53,331 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 23:04:53,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:04:53 BoogieIcfgContainer [2020-07-20 23:04:53,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 23:04:53,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 23:04:53,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 23:04:53,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 23:04:53,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:04:48" (1/3) ... [2020-07-20 23:04:53,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87ce93c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:04:53, skipping insertion in model container [2020-07-20 23:04:53,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:50" (2/3) ... [2020-07-20 23:04:53,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87ce93c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:04:53, skipping insertion in model container [2020-07-20 23:04:53,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:04:53" (3/3) ... [2020-07-20 23:04:53,356 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 23:04:53,366 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 23:04:53,379 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 23:04:53,393 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 23:04:53,423 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 23:04:53,423 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 23:04:53,423 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 23:04:53,424 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 23:04:53,424 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 23:04:53,424 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 23:04:53,424 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 23:04:53,425 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 23:04:53,467 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-07-20 23:04:53,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 23:04:53,509 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:53,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:53,511 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:53,517 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-07-20 23:04:53,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:53,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828557284] [2020-07-20 23:04:53,527 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:54,064 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:04:54,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:54,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 1244 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:04:54,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:54,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:54,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828557284] [2020-07-20 23:04:54,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:54,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:54,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120837052] [2020-07-20 23:04:54,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:54,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:54,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:54,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:54,401 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-07-20 23:04:54,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:54,745 INFO L93 Difference]: Finished difference Result 2315 states and 4118 transitions. [2020-07-20 23:04:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 23:04:54,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-20 23:04:54,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:54,793 INFO L225 Difference]: With dead ends: 2315 [2020-07-20 23:04:54,794 INFO L226 Difference]: Without dead ends: 1535 [2020-07-20 23:04:54,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:04:54,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2020-07-20 23:04:54,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1533. [2020-07-20 23:04:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1533 states. [2020-07-20 23:04:54,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2376 transitions. [2020-07-20 23:04:54,985 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2376 transitions. Word has length 326 [2020-07-20 23:04:54,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:54,988 INFO L479 AbstractCegarLoop]: Abstraction has 1533 states and 2376 transitions. [2020-07-20 23:04:54,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:04:54,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2376 transitions. [2020-07-20 23:04:55,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 23:04:55,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:55,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:55,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:55,216 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:55,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1296459700, now seen corresponding path program 1 times [2020-07-20 23:04:55,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:55,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128632697] [2020-07-20 23:04:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:55,598 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:04:55,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:55,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:55,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:55,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:55,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128632697] [2020-07-20 23:04:55,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:55,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:55,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921881803] [2020-07-20 23:04:55,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:55,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:55,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:55,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:55,866 INFO L87 Difference]: Start difference. First operand 1533 states and 2376 transitions. Second operand 3 states. [2020-07-20 23:04:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:56,066 INFO L93 Difference]: Finished difference Result 4401 states and 6790 transitions. [2020-07-20 23:04:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:56,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 23:04:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:56,083 INFO L225 Difference]: With dead ends: 4401 [2020-07-20 23:04:56,083 INFO L226 Difference]: Without dead ends: 2970 [2020-07-20 23:04:56,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:56,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2020-07-20 23:04:56,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 2968. [2020-07-20 23:04:56,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2968 states. [2020-07-20 23:04:56,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2968 states to 2968 states and 4569 transitions. [2020-07-20 23:04:56,205 INFO L78 Accepts]: Start accepts. Automaton has 2968 states and 4569 transitions. Word has length 328 [2020-07-20 23:04:56,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:56,207 INFO L479 AbstractCegarLoop]: Abstraction has 2968 states and 4569 transitions. [2020-07-20 23:04:56,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:56,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2968 states and 4569 transitions. [2020-07-20 23:04:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 23:04:56,218 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:56,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:56,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:56,433 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:56,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:56,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1249443567, now seen corresponding path program 1 times [2020-07-20 23:04:56,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:56,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358155689] [2020-07-20 23:04:56,435 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:56,713 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:04:56,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:56,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:56,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:56,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:56,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358155689] [2020-07-20 23:04:56,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:56,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:56,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306235499] [2020-07-20 23:04:56,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:56,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:56,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:56,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:56,858 INFO L87 Difference]: Start difference. First operand 2968 states and 4569 transitions. Second operand 3 states. [2020-07-20 23:04:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:57,047 INFO L93 Difference]: Finished difference Result 8872 states and 13658 transitions. [2020-07-20 23:04:57,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:57,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 23:04:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:57,078 INFO L225 Difference]: With dead ends: 8872 [2020-07-20 23:04:57,079 INFO L226 Difference]: Without dead ends: 5919 [2020-07-20 23:04:57,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5919 states. [2020-07-20 23:04:57,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5919 to 2979. [2020-07-20 23:04:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2979 states. [2020-07-20 23:04:57,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 4585 transitions. [2020-07-20 23:04:57,247 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 4585 transitions. Word has length 328 [2020-07-20 23:04:57,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:57,247 INFO L479 AbstractCegarLoop]: Abstraction has 2979 states and 4585 transitions. [2020-07-20 23:04:57,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 4585 transitions. [2020-07-20 23:04:57,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-20 23:04:57,259 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:57,259 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] [2020-07-20 23:04:57,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:57,473 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:57,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:57,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2111573239, now seen corresponding path program 1 times [2020-07-20 23:04:57,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:57,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469391482] [2020-07-20 23:04:57,475 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:57,878 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:57,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:57,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:57,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:57,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:57,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469391482] [2020-07-20 23:04:57,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:57,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:57,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212830323] [2020-07-20 23:04:57,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:57,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:57,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:57,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:57,971 INFO L87 Difference]: Start difference. First operand 2979 states and 4585 transitions. Second operand 3 states. [2020-07-20 23:04:58,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:58,165 INFO L93 Difference]: Finished difference Result 8829 states and 13576 transitions. [2020-07-20 23:04:58,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:58,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-07-20 23:04:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:58,194 INFO L225 Difference]: With dead ends: 8829 [2020-07-20 23:04:58,195 INFO L226 Difference]: Without dead ends: 5880 [2020-07-20 23:04:58,202 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 [2020-07-20 23:04:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2020-07-20 23:04:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 2989. [2020-07-20 23:04:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2989 states. [2020-07-20 23:04:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2989 states to 2989 states and 4599 transitions. [2020-07-20 23:04:58,388 INFO L78 Accepts]: Start accepts. Automaton has 2989 states and 4599 transitions. Word has length 329 [2020-07-20 23:04:58,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:58,389 INFO L479 AbstractCegarLoop]: Abstraction has 2989 states and 4599 transitions. [2020-07-20 23:04:58,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2989 states and 4599 transitions. [2020-07-20 23:04:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 23:04:58,402 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:58,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:58,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:58,617 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash -234794745, now seen corresponding path program 1 times [2020-07-20 23:04:58,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:58,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803145822] [2020-07-20 23:04:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:58,972 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:58,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:58,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:04:58,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:59,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:59,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803145822] [2020-07-20 23:04:59,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:59,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:59,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539422522] [2020-07-20 23:04:59,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:59,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:59,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:59,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:59,074 INFO L87 Difference]: Start difference. First operand 2989 states and 4599 transitions. Second operand 4 states. [2020-07-20 23:04:59,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:59,316 INFO L93 Difference]: Finished difference Result 6671 states and 10271 transitions. [2020-07-20 23:04:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:04:59,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-20 23:04:59,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:59,333 INFO L225 Difference]: With dead ends: 6671 [2020-07-20 23:04:59,333 INFO L226 Difference]: Without dead ends: 3370 [2020-07-20 23:04:59,340 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 [2020-07-20 23:04:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3370 states. [2020-07-20 23:04:59,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 3368. [2020-07-20 23:04:59,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3368 states. [2020-07-20 23:04:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 5162 transitions. [2020-07-20 23:04:59,473 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 5162 transitions. Word has length 330 [2020-07-20 23:04:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:59,474 INFO L479 AbstractCegarLoop]: Abstraction has 3368 states and 5162 transitions. [2020-07-20 23:04:59,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:04:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 5162 transitions. [2020-07-20 23:04:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 23:04:59,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:59,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:59,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:59,736 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:59,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:59,737 INFO L82 PathProgramCache]: Analyzing trace with hash -954031384, now seen corresponding path program 1 times [2020-07-20 23:04:59,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:59,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149155005] [2020-07-20 23:04:59,739 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:00,109 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:05:00,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:00,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:05:00,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:00,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:00,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149155005] [2020-07-20 23:05:00,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:00,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:05:00,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225305142] [2020-07-20 23:05:00,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:05:00,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:00,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:05:00,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:00,238 INFO L87 Difference]: Start difference. First operand 3368 states and 5162 transitions. Second operand 3 states. [2020-07-20 23:05:00,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:00,545 INFO L93 Difference]: Finished difference Result 9679 states and 14768 transitions. [2020-07-20 23:05:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:05:00,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-20 23:05:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:00,579 INFO L225 Difference]: With dead ends: 9679 [2020-07-20 23:05:00,579 INFO L226 Difference]: Without dead ends: 6596 [2020-07-20 23:05:00,588 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 [2020-07-20 23:05:00,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6596 states. [2020-07-20 23:05:00,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6596 to 6594. [2020-07-20 23:05:00,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6594 states. [2020-07-20 23:05:00,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6594 states to 6594 states and 10045 transitions. [2020-07-20 23:05:00,975 INFO L78 Accepts]: Start accepts. Automaton has 6594 states and 10045 transitions. Word has length 331 [2020-07-20 23:05:00,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:00,976 INFO L479 AbstractCegarLoop]: Abstraction has 6594 states and 10045 transitions. [2020-07-20 23:05:00,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:05:00,976 INFO L276 IsEmpty]: Start isEmpty. Operand 6594 states and 10045 transitions. [2020-07-20 23:05:00,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 23:05:00,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:00,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:05:01,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:01,208 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:01,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:01,209 INFO L82 PathProgramCache]: Analyzing trace with hash -566771069, now seen corresponding path program 1 times [2020-07-20 23:05:01,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:01,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870113391] [2020-07-20 23:05:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:01,501 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:05:01,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:01,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:05:01,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:01,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:01,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870113391] [2020-07-20 23:05:01,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:01,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:05:01,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853461874] [2020-07-20 23:05:01,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:05:01,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:01,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:05:01,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:05:01,591 INFO L87 Difference]: Start difference. First operand 6594 states and 10045 transitions. Second operand 4 states. [2020-07-20 23:05:02,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:02,187 INFO L93 Difference]: Finished difference Result 18612 states and 28143 transitions. [2020-07-20 23:05:02,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:05:02,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-07-20 23:05:02,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:02,228 INFO L225 Difference]: With dead ends: 18612 [2020-07-20 23:05:02,228 INFO L226 Difference]: Without dead ends: 12688 [2020-07-20 23:05:02,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:05:02,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12688 states. [2020-07-20 23:05:02,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12688 to 7019. [2020-07-20 23:05:02,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7019 states. [2020-07-20 23:05:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7019 states to 7019 states and 10753 transitions. [2020-07-20 23:05:02,558 INFO L78 Accepts]: Start accepts. Automaton has 7019 states and 10753 transitions. Word has length 331 [2020-07-20 23:05:02,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:02,558 INFO L479 AbstractCegarLoop]: Abstraction has 7019 states and 10753 transitions. [2020-07-20 23:05:02,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:05:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand 7019 states and 10753 transitions. [2020-07-20 23:05:02,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 23:05:02,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:02,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:05:02,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:02,788 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:02,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2130987534, now seen corresponding path program 1 times [2020-07-20 23:05:02,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:02,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413782562] [2020-07-20 23:05:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:03,113 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:05:03,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:03,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:05:03,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:03,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:03,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413782562] [2020-07-20 23:05:03,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:03,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 23:05:03,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102064475] [2020-07-20 23:05:03,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 23:05:03,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:03,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 23:05:03,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 23:05:03,248 INFO L87 Difference]: Start difference. First operand 7019 states and 10753 transitions. Second operand 9 states. [2020-07-20 23:05:09,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:09,613 INFO L93 Difference]: Finished difference Result 32546 states and 50203 transitions. [2020-07-20 23:05:09,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 23:05:09,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 331 [2020-07-20 23:05:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:09,695 INFO L225 Difference]: With dead ends: 32546 [2020-07-20 23:05:09,695 INFO L226 Difference]: Without dead ends: 31362 [2020-07-20 23:05:09,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 23:05:09,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31362 states. [2020-07-20 23:05:10,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31362 to 15097. [2020-07-20 23:05:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15097 states. [2020-07-20 23:05:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15097 states to 15097 states and 23247 transitions. [2020-07-20 23:05:10,650 INFO L78 Accepts]: Start accepts. Automaton has 15097 states and 23247 transitions. Word has length 331 [2020-07-20 23:05:10,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:10,651 INFO L479 AbstractCegarLoop]: Abstraction has 15097 states and 23247 transitions. [2020-07-20 23:05:10,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 23:05:10,651 INFO L276 IsEmpty]: Start isEmpty. Operand 15097 states and 23247 transitions. [2020-07-20 23:05:10,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 23:05:10,678 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:10,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:05:10,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:10,892 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:10,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:10,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1690397441, now seen corresponding path program 1 times [2020-07-20 23:05:10,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:10,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360821155] [2020-07-20 23:05:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:11,221 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:05:11,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:11,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:05:11,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:11,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:11,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360821155] [2020-07-20 23:05:11,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:11,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:05:11,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491669355] [2020-07-20 23:05:11,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:05:11,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:11,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:05:11,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:11,324 INFO L87 Difference]: Start difference. First operand 15097 states and 23247 transitions. Second operand 3 states. [2020-07-20 23:05:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:12,409 INFO L93 Difference]: Finished difference Result 31913 states and 49451 transitions. [2020-07-20 23:05:12,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:05:12,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-20 23:05:12,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:12,457 INFO L225 Difference]: With dead ends: 31913 [2020-07-20 23:05:12,457 INFO L226 Difference]: Without dead ends: 19375 [2020-07-20 23:05:12,495 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 [2020-07-20 23:05:12,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19375 states. [2020-07-20 23:05:13,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19375 to 18053. [2020-07-20 23:05:13,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18053 states. [2020-07-20 23:05:13,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18053 states to 18053 states and 28093 transitions. [2020-07-20 23:05:13,356 INFO L78 Accepts]: Start accepts. Automaton has 18053 states and 28093 transitions. Word has length 331 [2020-07-20 23:05:13,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:13,356 INFO L479 AbstractCegarLoop]: Abstraction has 18053 states and 28093 transitions. [2020-07-20 23:05:13,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:05:13,356 INFO L276 IsEmpty]: Start isEmpty. Operand 18053 states and 28093 transitions. [2020-07-20 23:05:13,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 23:05:13,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:13,380 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] [2020-07-20 23:05:13,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:13,593 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:13,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:13,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1801153172, now seen corresponding path program 1 times [2020-07-20 23:05:13,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:13,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954140812] [2020-07-20 23:05:13,595 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:13,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:05:13,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:13,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:05:13,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:13,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:13,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954140812] [2020-07-20 23:05:13,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:13,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:05:13,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316129554] [2020-07-20 23:05:13,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:05:13,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:13,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:05:13,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:13,971 INFO L87 Difference]: Start difference. First operand 18053 states and 28093 transitions. Second operand 3 states. [2020-07-20 23:05:15,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:15,080 INFO L93 Difference]: Finished difference Result 53800 states and 83690 transitions. [2020-07-20 23:05:15,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:05:15,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-20 23:05:15,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:15,159 INFO L225 Difference]: With dead ends: 53800 [2020-07-20 23:05:15,159 INFO L226 Difference]: Without dead ends: 35922 [2020-07-20 23:05:15,201 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 [2020-07-20 23:05:15,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35922 states. [2020-07-20 23:05:16,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35922 to 18137. [2020-07-20 23:05:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18137 states. [2020-07-20 23:05:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18137 states to 18137 states and 28204 transitions. [2020-07-20 23:05:16,898 INFO L78 Accepts]: Start accepts. Automaton has 18137 states and 28204 transitions. Word has length 332 [2020-07-20 23:05:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:16,898 INFO L479 AbstractCegarLoop]: Abstraction has 18137 states and 28204 transitions. [2020-07-20 23:05:16,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:05:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 18137 states and 28204 transitions. [2020-07-20 23:05:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 23:05:16,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:16,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:05:17,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:17,123 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:17,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:17,124 INFO L82 PathProgramCache]: Analyzing trace with hash 977556307, now seen corresponding path program 1 times [2020-07-20 23:05:17,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:17,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047808930] [2020-07-20 23:05:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:17,421 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:05:17,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:17,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:05:17,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:17,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:17,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047808930] [2020-07-20 23:05:17,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:17,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:05:17,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663576504] [2020-07-20 23:05:17,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:05:17,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:17,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:05:17,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:17,509 INFO L87 Difference]: Start difference. First operand 18137 states and 28204 transitions. Second operand 3 states. [2020-07-20 23:05:18,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:18,821 INFO L93 Difference]: Finished difference Result 52041 states and 80585 transitions. [2020-07-20 23:05:18,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:05:18,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-20 23:05:18,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:18,886 INFO L225 Difference]: With dead ends: 52041 [2020-07-20 23:05:18,886 INFO L226 Difference]: Without dead ends: 35100 [2020-07-20 23:05:18,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:18,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35100 states. [2020-07-20 23:05:20,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35100 to 18286. [2020-07-20 23:05:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18286 states. [2020-07-20 23:05:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18286 states to 18286 states and 28398 transitions. [2020-07-20 23:05:20,044 INFO L78 Accepts]: Start accepts. Automaton has 18286 states and 28398 transitions. Word has length 333 [2020-07-20 23:05:20,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:20,045 INFO L479 AbstractCegarLoop]: Abstraction has 18286 states and 28398 transitions. [2020-07-20 23:05:20,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:05:20,045 INFO L276 IsEmpty]: Start isEmpty. Operand 18286 states and 28398 transitions. [2020-07-20 23:05:20,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 23:05:20,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:20,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:05:20,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:20,261 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:20,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:20,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1562539146, now seen corresponding path program 1 times [2020-07-20 23:05:20,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:20,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411065417] [2020-07-20 23:05:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:20,589 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:05:20,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:20,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:05:20,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:20,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:20,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411065417] [2020-07-20 23:05:20,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:20,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:05:20,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995802606] [2020-07-20 23:05:20,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:05:20,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:20,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:05:20,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:20,678 INFO L87 Difference]: Start difference. First operand 18286 states and 28398 transitions. Second operand 3 states. [2020-07-20 23:05:22,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:22,576 INFO L93 Difference]: Finished difference Result 54333 states and 84373 transitions. [2020-07-20 23:05:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:05:22,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-20 23:05:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:22,627 INFO L225 Difference]: With dead ends: 54333 [2020-07-20 23:05:22,627 INFO L226 Difference]: Without dead ends: 36331 [2020-07-20 23:05:22,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:22,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36331 states. [2020-07-20 23:05:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36331 to 18376. [2020-07-20 23:05:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18376 states. [2020-07-20 23:05:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18376 states to 18376 states and 28516 transitions. [2020-07-20 23:05:23,610 INFO L78 Accepts]: Start accepts. Automaton has 18376 states and 28516 transitions. Word has length 333 [2020-07-20 23:05:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:23,610 INFO L479 AbstractCegarLoop]: Abstraction has 18376 states and 28516 transitions. [2020-07-20 23:05:23,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:05:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 18376 states and 28516 transitions. [2020-07-20 23:05:23,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 23:05:23,621 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:23,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:05:23,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:23,822 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:23,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:23,823 INFO L82 PathProgramCache]: Analyzing trace with hash -81220575, now seen corresponding path program 1 times [2020-07-20 23:05:23,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:23,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461021690] [2020-07-20 23:05:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:24,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:05:24,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:24,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:05:24,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:24,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:24,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461021690] [2020-07-20 23:05:24,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:24,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:05:24,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044921355] [2020-07-20 23:05:24,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:05:24,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:24,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:05:24,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:24,242 INFO L87 Difference]: Start difference. First operand 18376 states and 28516 transitions. Second operand 3 states. [2020-07-20 23:05:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:25,738 INFO L93 Difference]: Finished difference Result 54222 states and 84063 transitions. [2020-07-20 23:05:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:05:25,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-20 23:05:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:25,782 INFO L225 Difference]: With dead ends: 54222 [2020-07-20 23:05:25,782 INFO L226 Difference]: Without dead ends: 36349 [2020-07-20 23:05:25,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36349 states. [2020-07-20 23:05:27,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36349 to 18376. [2020-07-20 23:05:27,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18376 states. [2020-07-20 23:05:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18376 states to 18376 states and 28510 transitions. [2020-07-20 23:05:27,501 INFO L78 Accepts]: Start accepts. Automaton has 18376 states and 28510 transitions. Word has length 334 [2020-07-20 23:05:27,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:27,501 INFO L479 AbstractCegarLoop]: Abstraction has 18376 states and 28510 transitions. [2020-07-20 23:05:27,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:05:27,501 INFO L276 IsEmpty]: Start isEmpty. Operand 18376 states and 28510 transitions. [2020-07-20 23:05:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 23:05:27,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:27,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:05:27,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:27,713 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:27,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1314530743, now seen corresponding path program 1 times [2020-07-20 23:05:27,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:27,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982037059] [2020-07-20 23:05:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:28,063 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:05:28,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:28,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:05:28,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:28,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:28,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982037059] [2020-07-20 23:05:28,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:28,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:05:28,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012292444] [2020-07-20 23:05:28,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:05:28,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:28,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:05:28,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:05:28,197 INFO L87 Difference]: Start difference. First operand 18376 states and 28510 transitions. Second operand 4 states. [2020-07-20 23:05:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:30,040 INFO L93 Difference]: Finished difference Result 53870 states and 83530 transitions. [2020-07-20 23:05:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:05:30,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-20 23:05:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:30,079 INFO L225 Difference]: With dead ends: 53870 [2020-07-20 23:05:30,079 INFO L226 Difference]: Without dead ends: 35877 [2020-07-20 23:05:30,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:05:30,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35877 states. [2020-07-20 23:05:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35877 to 35875. [2020-07-20 23:05:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35875 states. [2020-07-20 23:05:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35875 states to 35875 states and 55303 transitions. [2020-07-20 23:05:31,954 INFO L78 Accepts]: Start accepts. Automaton has 35875 states and 55303 transitions. Word has length 334 [2020-07-20 23:05:31,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:31,955 INFO L479 AbstractCegarLoop]: Abstraction has 35875 states and 55303 transitions. [2020-07-20 23:05:31,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:05:31,955 INFO L276 IsEmpty]: Start isEmpty. Operand 35875 states and 55303 transitions. [2020-07-20 23:05:31,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 23:05:31,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:31,977 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] [2020-07-20 23:05:32,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:32,191 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:32,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:32,192 INFO L82 PathProgramCache]: Analyzing trace with hash -2048254322, now seen corresponding path program 1 times [2020-07-20 23:05:32,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:32,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670689587] [2020-07-20 23:05:32,193 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:32,493 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:05:32,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:32,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:05:32,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:32,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:32,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670689587] [2020-07-20 23:05:32,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:32,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:05:32,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163342110] [2020-07-20 23:05:32,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:05:32,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:32,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:05:32,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:05:32,576 INFO L87 Difference]: Start difference. First operand 35875 states and 55303 transitions. Second operand 4 states. [2020-07-20 23:05:36,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:36,621 INFO L93 Difference]: Finished difference Result 104609 states and 161055 transitions. [2020-07-20 23:05:36,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:05:36,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-20 23:05:36,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:36,696 INFO L225 Difference]: With dead ends: 104609 [2020-07-20 23:05:36,696 INFO L226 Difference]: Without dead ends: 70725 [2020-07-20 23:05:36,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:05:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70725 states. [2020-07-20 23:05:38,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70725 to 37803. [2020-07-20 23:05:38,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37803 states. [2020-07-20 23:05:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37803 states to 37803 states and 58296 transitions. [2020-07-20 23:05:38,832 INFO L78 Accepts]: Start accepts. Automaton has 37803 states and 58296 transitions. Word has length 335 [2020-07-20 23:05:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:38,832 INFO L479 AbstractCegarLoop]: Abstraction has 37803 states and 58296 transitions. [2020-07-20 23:05:38,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:05:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 37803 states and 58296 transitions. [2020-07-20 23:05:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 23:05:38,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:38,859 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] [2020-07-20 23:05:39,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:39,075 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:39,076 INFO L82 PathProgramCache]: Analyzing trace with hash -499562768, now seen corresponding path program 1 times [2020-07-20 23:05:39,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:39,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949589537] [2020-07-20 23:05:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:39,377 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:05:39,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:39,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:05:39,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:39,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:39,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949589537] [2020-07-20 23:05:39,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:39,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:05:39,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783833344] [2020-07-20 23:05:39,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:05:39,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:39,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:05:39,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:05:39,479 INFO L87 Difference]: Start difference. First operand 37803 states and 58296 transitions. Second operand 4 states. [2020-07-20 23:05:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:43,204 INFO L93 Difference]: Finished difference Result 101329 states and 155712 transitions. [2020-07-20 23:05:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:05:43,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-20 23:05:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:43,271 INFO L225 Difference]: With dead ends: 101329 [2020-07-20 23:05:43,272 INFO L226 Difference]: Without dead ends: 67544 [2020-07-20 23:05:43,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:05:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67544 states. [2020-07-20 23:05:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67544 to 38729. [2020-07-20 23:05:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38729 states. [2020-07-20 23:05:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38729 states to 38729 states and 59801 transitions. [2020-07-20 23:05:47,054 INFO L78 Accepts]: Start accepts. Automaton has 38729 states and 59801 transitions. Word has length 335 [2020-07-20 23:05:47,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:47,054 INFO L479 AbstractCegarLoop]: Abstraction has 38729 states and 59801 transitions. [2020-07-20 23:05:47,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:05:47,054 INFO L276 IsEmpty]: Start isEmpty. Operand 38729 states and 59801 transitions. [2020-07-20 23:05:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 23:05:47,074 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:47,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:05:47,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:47,287 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:47,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:47,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1080870749, now seen corresponding path program 1 times [2020-07-20 23:05:47,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:47,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572747370] [2020-07-20 23:05:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:47,643 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:05:47,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:47,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:05:47,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:47,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:47,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572747370] [2020-07-20 23:05:47,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:47,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:05:47,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347068691] [2020-07-20 23:05:47,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:05:47,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:47,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:05:47,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:47,740 INFO L87 Difference]: Start difference. First operand 38729 states and 59801 transitions. Second operand 3 states. [2020-07-20 23:05:51,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:51,643 INFO L93 Difference]: Finished difference Result 107064 states and 164414 transitions. [2020-07-20 23:05:51,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:05:51,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-20 23:05:51,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:51,733 INFO L225 Difference]: With dead ends: 107064 [2020-07-20 23:05:51,733 INFO L226 Difference]: Without dead ends: 72989 [2020-07-20 23:05:51,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:51,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72989 states. [2020-07-20 23:05:56,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72989 to 72987. [2020-07-20 23:05:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72987 states. [2020-07-20 23:05:56,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72987 states to 72987 states and 111502 transitions. [2020-07-20 23:05:56,180 INFO L78 Accepts]: Start accepts. Automaton has 72987 states and 111502 transitions. Word has length 336 [2020-07-20 23:05:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:56,181 INFO L479 AbstractCegarLoop]: Abstraction has 72987 states and 111502 transitions. [2020-07-20 23:05:56,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:05:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 72987 states and 111502 transitions. [2020-07-20 23:05:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 23:05:56,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:56,218 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] [2020-07-20 23:05:56,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:56,419 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:56,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:56,420 INFO L82 PathProgramCache]: Analyzing trace with hash -2134426083, now seen corresponding path program 1 times [2020-07-20 23:05:56,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:56,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171062284] [2020-07-20 23:05:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:56,751 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:05:56,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:56,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:05:56,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:56,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:56,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171062284] [2020-07-20 23:05:56,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:56,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:05:56,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929797561] [2020-07-20 23:05:56,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:05:56,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:56,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:05:56,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:05:56,819 INFO L87 Difference]: Start difference. First operand 72987 states and 111502 transitions. Second operand 4 states. [2020-07-20 23:06:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:06:02,237 INFO L93 Difference]: Finished difference Result 139234 states and 212360 transitions. [2020-07-20 23:06:02,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:06:02,238 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-20 23:06:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:06:02,339 INFO L225 Difference]: With dead ends: 139234 [2020-07-20 23:06:02,339 INFO L226 Difference]: Without dead ends: 71247 [2020-07-20 23:06:02,405 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 [2020-07-20 23:06:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71247 states. [2020-07-20 23:06:06,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71247 to 71129. [2020-07-20 23:06:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71129 states. [2020-07-20 23:06:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71129 states to 71129 states and 108606 transitions. [2020-07-20 23:06:06,595 INFO L78 Accepts]: Start accepts. Automaton has 71129 states and 108606 transitions. Word has length 338 [2020-07-20 23:06:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:06:06,596 INFO L479 AbstractCegarLoop]: Abstraction has 71129 states and 108606 transitions. [2020-07-20 23:06:06,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:06:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 71129 states and 108606 transitions. [2020-07-20 23:06:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 23:06:06,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:06:06,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:06:06,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:06,827 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:06:06,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:06:06,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1964155106, now seen corresponding path program 1 times [2020-07-20 23:06:06,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:06:06,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554474996] [2020-07-20 23:06:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:07,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:06:07,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:06:07,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:06:07,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:06:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:06:07,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:06:07,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554474996] [2020-07-20 23:06:07,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:06:07,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:06:07,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468027145] [2020-07-20 23:06:07,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:06:07,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:06:07,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:06:07,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:06:07,242 INFO L87 Difference]: Start difference. First operand 71129 states and 108606 transitions. Second operand 4 states. [2020-07-20 23:06:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:06:13,525 INFO L93 Difference]: Finished difference Result 149296 states and 227569 transitions. [2020-07-20 23:06:13,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:06:13,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-20 23:06:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:06:13,602 INFO L225 Difference]: With dead ends: 149296 [2020-07-20 23:06:13,602 INFO L226 Difference]: Without dead ends: 75439 [2020-07-20 23:06:13,641 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 [2020-07-20 23:06:13,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75439 states. [2020-07-20 23:06:17,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75439 to 75433. [2020-07-20 23:06:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75433 states. [2020-07-20 23:06:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75433 states to 75433 states and 114354 transitions. [2020-07-20 23:06:17,873 INFO L78 Accepts]: Start accepts. Automaton has 75433 states and 114354 transitions. Word has length 338 [2020-07-20 23:06:17,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:06:17,873 INFO L479 AbstractCegarLoop]: Abstraction has 75433 states and 114354 transitions. [2020-07-20 23:06:17,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:06:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 75433 states and 114354 transitions. [2020-07-20 23:06:17,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 23:06:17,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:06:17,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:06:18,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:18,111 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:06:18,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:06:18,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1695834328, now seen corresponding path program 1 times [2020-07-20 23:06:18,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:06:18,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707041952] [2020-07-20 23:06:18,113 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:18,464 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:06:18,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:06:18,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:06:18,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:06:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:06:18,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:06:18,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707041952] [2020-07-20 23:06:18,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:06:18,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:06:18,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773493313] [2020-07-20 23:06:18,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:06:18,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:06:18,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:06:18,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:06:18,568 INFO L87 Difference]: Start difference. First operand 75433 states and 114354 transitions. Second operand 3 states. [2020-07-20 23:06:28,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:06:28,619 INFO L93 Difference]: Finished difference Result 211947 states and 320509 transitions. [2020-07-20 23:06:28,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:06:28,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2020-07-20 23:06:28,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:06:28,802 INFO L225 Difference]: With dead ends: 211947 [2020-07-20 23:06:28,803 INFO L226 Difference]: Without dead ends: 143913 [2020-07-20 23:06:28,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:06:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143913 states. [2020-07-20 23:06:40,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143913 to 143115. [2020-07-20 23:06:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143115 states. [2020-07-20 23:06:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143115 states to 143115 states and 215630 transitions. [2020-07-20 23:06:40,331 INFO L78 Accepts]: Start accepts. Automaton has 143115 states and 215630 transitions. Word has length 340 [2020-07-20 23:06:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:06:40,331 INFO L479 AbstractCegarLoop]: Abstraction has 143115 states and 215630 transitions. [2020-07-20 23:06:40,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:06:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 143115 states and 215630 transitions. [2020-07-20 23:06:40,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 23:06:40,407 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:06:40,407 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] [2020-07-20 23:06:40,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:40,608 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:06:40,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:06:40,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1101765556, now seen corresponding path program 1 times [2020-07-20 23:06:40,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:06:40,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026067193] [2020-07-20 23:06:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:40,971 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:06:40,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:06:40,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:06:40,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:06:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:06:41,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:06:41,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026067193] [2020-07-20 23:06:41,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:06:41,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:06:41,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915462207] [2020-07-20 23:06:41,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:06:41,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:06:41,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:06:41,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:06:41,084 INFO L87 Difference]: Start difference. First operand 143115 states and 215630 transitions. Second operand 4 states. [2020-07-20 23:06:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:06:55,099 INFO L93 Difference]: Finished difference Result 360603 states and 541373 transitions. [2020-07-20 23:06:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:06:55,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 342 [2020-07-20 23:06:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:06:55,372 INFO L225 Difference]: With dead ends: 360603 [2020-07-20 23:06:55,372 INFO L226 Difference]: Without dead ends: 220819 [2020-07-20 23:06:55,483 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 [2020-07-20 23:06:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220819 states. [2020-07-20 23:07:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220819 to 220817. [2020-07-20 23:07:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220817 states. [2020-07-20 23:07:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220817 states to 220817 states and 328833 transitions. [2020-07-20 23:07:14,378 INFO L78 Accepts]: Start accepts. Automaton has 220817 states and 328833 transitions. Word has length 342 [2020-07-20 23:07:14,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:07:14,378 INFO L479 AbstractCegarLoop]: Abstraction has 220817 states and 328833 transitions. [2020-07-20 23:07:14,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:07:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 220817 states and 328833 transitions. [2020-07-20 23:07:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-20 23:07:14,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:07:14,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:07:14,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:07:14,691 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:07:14,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:07:14,692 INFO L82 PathProgramCache]: Analyzing trace with hash 355465202, now seen corresponding path program 1 times [2020-07-20 23:07:14,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:07:14,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23338376] [2020-07-20 23:07:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:07:14,993 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:07:14,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:07:14,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:07:15,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:07:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:07:15,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:07:15,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23338376] [2020-07-20 23:07:15,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:07:15,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 23:07:15,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555779612] [2020-07-20 23:07:15,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 23:07:15,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:07:15,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 23:07:15,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 23:07:15,123 INFO L87 Difference]: Start difference. First operand 220817 states and 328833 transitions. Second operand 9 states. [2020-07-20 23:09:09,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:09,807 INFO L93 Difference]: Finished difference Result 1339164 states and 2034077 transitions. [2020-07-20 23:09:09,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 23:09:09,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 345 [2020-07-20 23:09:09,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:11,797 INFO L225 Difference]: With dead ends: 1339164 [2020-07-20 23:09:11,797 INFO L226 Difference]: Without dead ends: 1265030 [2020-07-20 23:09:12,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=873, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 23:09:13,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265030 states. [2020-07-20 23:10:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265030 to 561816. [2020-07-20 23:10:19,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 561816 states. [2020-07-20 23:10:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561816 states to 561816 states and 844681 transitions. [2020-07-20 23:10:21,453 INFO L78 Accepts]: Start accepts. Automaton has 561816 states and 844681 transitions. Word has length 345 [2020-07-20 23:10:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:10:21,454 INFO L479 AbstractCegarLoop]: Abstraction has 561816 states and 844681 transitions. [2020-07-20 23:10:21,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 23:10:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 561816 states and 844681 transitions. [2020-07-20 23:10:21,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-20 23:10:21,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:21,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:10:21,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:21,939 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:21,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:21,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1398854667, now seen corresponding path program 1 times [2020-07-20 23:10:21,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:21,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033508437] [2020-07-20 23:10:21,941 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:22,294 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:10:22,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:22,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:10:22,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:10:22,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:22,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033508437] [2020-07-20 23:10:22,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:22,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:10:22,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99349535] [2020-07-20 23:10:22,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:10:22,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:22,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:10:22,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:10:22,386 INFO L87 Difference]: Start difference. First operand 561816 states and 844681 transitions. Second operand 3 states. [2020-07-20 23:11:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:49,934 INFO L93 Difference]: Finished difference Result 1394236 states and 2111267 transitions. [2020-07-20 23:11:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:49,934 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 345 [2020-07-20 23:11:49,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:51,439 INFO L225 Difference]: With dead ends: 1394236 [2020-07-20 23:11:51,440 INFO L226 Difference]: Without dead ends: 882322 [2020-07-20 23:11:51,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882322 states. [2020-07-20 23:13:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882322 to 767156. [2020-07-20 23:13:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767156 states. [2020-07-20 23:13:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767156 states to 767156 states and 1167845 transitions. [2020-07-20 23:13:26,907 INFO L78 Accepts]: Start accepts. Automaton has 767156 states and 1167845 transitions. Word has length 345 [2020-07-20 23:13:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:13:26,908 INFO L479 AbstractCegarLoop]: Abstraction has 767156 states and 1167845 transitions. [2020-07-20 23:13:26,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:13:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 767156 states and 1167845 transitions. [2020-07-20 23:13:27,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-20 23:13:27,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:13:27,214 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] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (24)] Forcibly destroying the process [2020-07-20 23:13:28,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:13:28,368 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:13:28,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:13:28,369 INFO L82 PathProgramCache]: Analyzing trace with hash -653971524, now seen corresponding path program 1 times [2020-07-20 23:13:28,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:13:28,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630035743] [2020-07-20 23:13:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:13:28,725 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:13:28,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:13:28,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:13:28,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:13:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:13:28,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:13:28,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630035743] [2020-07-20 23:13:28,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:13:28,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:13:28,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256308763] [2020-07-20 23:13:28,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:13:28,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:13:28,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:13:28,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:13:28,866 INFO L87 Difference]: Start difference. First operand 767156 states and 1167845 transitions. Second operand 3 states. [2020-07-20 23:15:43,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:15:43,530 INFO L93 Difference]: Finished difference Result 1948908 states and 2988159 transitions. [2020-07-20 23:15:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:15:43,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 346 [2020-07-20 23:15:43,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:15:45,824 INFO L225 Difference]: With dead ends: 1948908 [2020-07-20 23:15:45,824 INFO L226 Difference]: Without dead ends: 1236702 [2020-07-20 23:15:46,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:15:47,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236702 states.