/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:20:17,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:20:17,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:20:17,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:20:17,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:20:17,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:20:17,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:20:17,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:20:17,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:20:17,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:20:17,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:20:17,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:20:17,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:20:17,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:20:17,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:20:17,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:20:17,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:20:17,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:20:17,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:20:17,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:20:17,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:20:17,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:20:17,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:20:17,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:20:17,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 13:20:17,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:20:17,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:20:17,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:20:17,426 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 13:20:17,443 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:20:17,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:20:17,445 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:20:17,445 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:20:17,445 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:20:17,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:20:17,445 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:20:17,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:20:17,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:20:17,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:20:17,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:20:17,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:20:17,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:20:17,447 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:20:17,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:20:17,447 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:20:17,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:20:17,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:20:17,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:20:17,448 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:20:17,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:20:17,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:20:17,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:20:17,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:20:17,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:20:17,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:20:17,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:17,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:20:17,450 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:20:17,450 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 13:20:17,752 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:20:17,767 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:20:17,771 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:20:17,773 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:20:17,773 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:20:17,774 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-21 13:20:17,858 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ff51e470/f3f8bfd880e24c5e8f8b826ef31e5d67/FLAGd42c14fff [2020-07-21 13:20:18,432 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:20:18,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-21 13:20:18,440 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ff51e470/f3f8bfd880e24c5e8f8b826ef31e5d67/FLAGd42c14fff [2020-07-21 13:20:18,764 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ff51e470/f3f8bfd880e24c5e8f8b826ef31e5d67 [2020-07-21 13:20:18,774 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:20:18,777 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:20:18,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:20:18,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:20:18,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:20:18,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:20:18" (1/1) ... [2020-07-21 13:20:18,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@509fad81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:20:18, skipping insertion in model container [2020-07-21 13:20:18,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:20:18" (1/1) ... [2020-07-21 13:20:18,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:20:18,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:20:18,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:20:19,005 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:20:19,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:20:19,040 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:20:19,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:20:19 WrapperNode [2020-07-21 13:20:19,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:20:19,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:20:19,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:20:19,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:20:19,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:20:19" (1/1) ... [2020-07-21 13:20:19,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:20:19" (1/1) ... [2020-07-21 13:20:19,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:20:19" (1/1) ... [2020-07-21 13:20:19,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:20:19" (1/1) ... [2020-07-21 13:20:19,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:20:19" (1/1) ... [2020-07-21 13:20:19,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:20:19" (1/1) ... [2020-07-21 13:20:19,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:20:19" (1/1) ... [2020-07-21 13:20:19,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:20:19,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:20:19,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:20:19,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:20:19,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:20:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:20:19,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:20:19,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:20:19,251 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 13:20:19,251 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 13:20:19,251 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:20:19,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:20:19,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:20:19,252 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 13:20:19,252 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 13:20:19,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:20:19,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:20:19,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:20:19,470 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:20:19,470 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 13:20:19,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:20:19 BoogieIcfgContainer [2020-07-21 13:20:19,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:20:19,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:20:19,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:20:19,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:20:19,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:20:18" (1/3) ... [2020-07-21 13:20:19,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31bfd13d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:20:19, skipping insertion in model container [2020-07-21 13:20:19,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:20:19" (2/3) ... [2020-07-21 13:20:19,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31bfd13d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:20:19, skipping insertion in model container [2020-07-21 13:20:19,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:20:19" (3/3) ... [2020-07-21 13:20:19,487 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2020-07-21 13:20:19,500 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:20:19,509 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:20:19,538 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:20:19,617 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:20:19,618 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:20:19,618 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:20:19,618 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:20:19,620 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:20:19,621 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:20:19,621 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:20:19,621 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:20:19,652 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 13:20:19,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 13:20:19,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:19,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:19,662 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:19,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 13:20:19,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:19,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632447679] [2020-07-21 13:20:19,684 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:19,752 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:19,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:19,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:20:19,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:20:19,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:20:19,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632447679] [2020-07-21 13:20:19,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:20:19,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:20:19,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322946289] [2020-07-21 13:20:19,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:20:19,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:19,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:20:19,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:20:19,886 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 13:20:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:20,016 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 13:20:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:20:20,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 13:20:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:20,033 INFO L225 Difference]: With dead ends: 44 [2020-07-21 13:20:20,033 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 13:20:20,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:20:20,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 13:20:20,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 13:20:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 13:20:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 13:20:20,085 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 13:20:20,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:20,086 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 13:20:20,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:20:20,086 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 13:20:20,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 13:20:20,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:20,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:20,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:20,295 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:20,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:20,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 13:20:20,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:20,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628448890] [2020-07-21 13:20:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:20,325 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:20,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:20,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:20:20,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:20:20,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:20:20,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628448890] [2020-07-21 13:20:20,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:20:20,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:20:20,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471864045] [2020-07-21 13:20:20,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:20:20,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:20,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:20:20,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:20:20,384 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 13:20:20,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:20,466 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 13:20:20,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:20:20,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 13:20:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:20,469 INFO L225 Difference]: With dead ends: 36 [2020-07-21 13:20:20,469 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 13:20:20,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:20:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 13:20:20,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 13:20:20,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 13:20:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 13:20:20,483 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 13:20:20,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:20,483 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 13:20:20,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:20:20,484 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 13:20:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 13:20:20,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:20,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:20,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:20,701 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:20,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:20,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 13:20:20,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:20,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592196223] [2020-07-21 13:20:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:20,739 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:20,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:20,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:20:20,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:20:20,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:21,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:21,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:20:21,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592196223] [2020-07-21 13:20:21,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:21,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 13:20:21,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678800494] [2020-07-21 13:20:21,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 13:20:21,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:21,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 13:20:21,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 13:20:21,084 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 13:20:21,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:21,230 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 13:20:21,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:20:21,231 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 13:20:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:21,233 INFO L225 Difference]: With dead ends: 41 [2020-07-21 13:20:21,233 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 13:20:21,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:20:21,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 13:20:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 13:20:21,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 13:20:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 13:20:21,245 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 13:20:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:21,246 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 13:20:21,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 13:20:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 13:20:21,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 13:20:21,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:21,249 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:21,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:21,464 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:21,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:21,465 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 13:20:21,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:21,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331754920] [2020-07-21 13:20:21,466 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:21,514 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:21,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:21,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:20:21,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:20:21,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:21,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:21,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:20:21,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331754920] [2020-07-21 13:20:21,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:21,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 13:20:21,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012745554] [2020-07-21 13:20:21,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 13:20:21,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:21,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 13:20:21,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 13:20:21,755 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 13:20:21,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:21,883 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 13:20:21,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:20:21,884 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 13:20:21,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:21,886 INFO L225 Difference]: With dead ends: 46 [2020-07-21 13:20:21,886 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 13:20:21,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:20:21,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 13:20:21,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 13:20:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 13:20:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 13:20:21,900 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 13:20:21,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:21,900 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 13:20:21,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 13:20:21,900 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 13:20:21,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 13:20:21,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:21,903 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:22,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:22,119 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:22,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:22,120 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 13:20:22,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:22,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759208374] [2020-07-21 13:20:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:22,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:22,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:22,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:20:22,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 13:20:22,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:22,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:22,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:22,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 13:20:22,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759208374] [2020-07-21 13:20:22,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:22,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 13:20:22,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42043950] [2020-07-21 13:20:22,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 13:20:22,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:22,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 13:20:22,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:20:22,638 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 13:20:22,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:22,813 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 13:20:22,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:20:22,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 13:20:22,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:22,817 INFO L225 Difference]: With dead ends: 51 [2020-07-21 13:20:22,818 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 13:20:22,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:20:22,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 13:20:22,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 13:20:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 13:20:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 13:20:22,830 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 13:20:22,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:22,830 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 13:20:22,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 13:20:22,831 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 13:20:22,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 13:20:22,833 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:22,833 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:23,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:23,048 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:23,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:23,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 13:20:23,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:23,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647672064] [2020-07-21 13:20:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:23,098 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:23,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:23,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:20:23,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 13:20:23,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:23,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:23,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:23,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 13:20:23,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647672064] [2020-07-21 13:20:23,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:23,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 13:20:23,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563681188] [2020-07-21 13:20:23,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 13:20:23,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:23,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 13:20:23,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:20:23,461 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 13:20:23,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:23,634 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 13:20:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:20:23,641 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 13:20:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:23,643 INFO L225 Difference]: With dead ends: 56 [2020-07-21 13:20:23,647 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 13:20:23,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:20:23,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 13:20:23,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 13:20:23,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 13:20:23,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 13:20:23,670 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 13:20:23,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:23,675 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 13:20:23,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 13:20:23,675 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 13:20:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 13:20:23,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:23,682 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:23,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:23,897 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:23,897 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 13:20:23,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:23,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481829055] [2020-07-21 13:20:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:23,941 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:23,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:23,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:20:23,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 13:20:24,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:24,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:24,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:24,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:24,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 13:20:24,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481829055] [2020-07-21 13:20:24,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:24,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 13:20:24,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716941203] [2020-07-21 13:20:24,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 13:20:24,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:24,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 13:20:24,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 13:20:24,619 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 13:20:24,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:24,831 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 13:20:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:20:24,831 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 13:20:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:24,833 INFO L225 Difference]: With dead ends: 61 [2020-07-21 13:20:24,834 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 13:20:24,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 13:20:24,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 13:20:24,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 13:20:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 13:20:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 13:20:24,846 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 13:20:24,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:24,846 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 13:20:24,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 13:20:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 13:20:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 13:20:24,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:24,849 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:25,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:25,054 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:25,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:25,055 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 13:20:25,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:25,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302438438] [2020-07-21 13:20:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:25,100 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:25,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:25,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:20:25,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 13:20:25,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:25,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:25,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:25,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:25,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:25,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 13:20:25,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302438438] [2020-07-21 13:20:25,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:25,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 13:20:25,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707150247] [2020-07-21 13:20:25,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 13:20:25,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:25,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 13:20:25,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 13:20:25,753 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 13:20:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:25,967 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 13:20:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:20:25,968 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 13:20:25,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:25,971 INFO L225 Difference]: With dead ends: 66 [2020-07-21 13:20:25,971 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 13:20:25,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 13:20:25,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 13:20:25,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 13:20:25,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 13:20:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 13:20:25,983 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 13:20:25,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:25,984 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 13:20:25,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 13:20:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 13:20:25,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 13:20:25,987 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:25,987 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:26,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:26,203 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:26,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:26,203 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 13:20:26,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:26,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519439759] [2020-07-21 13:20:26,205 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:26,260 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:26,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:26,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:20:26,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 13:20:26,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:26,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:26,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:27,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:27,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:27,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:27,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:27,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 13:20:27,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519439759] [2020-07-21 13:20:27,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:27,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 13:20:27,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695089604] [2020-07-21 13:20:27,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 13:20:27,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:27,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 13:20:27,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 13:20:27,336 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 13:20:27,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:27,583 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 13:20:27,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:20:27,584 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 13:20:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:27,586 INFO L225 Difference]: With dead ends: 71 [2020-07-21 13:20:27,587 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 13:20:27,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:20:27,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 13:20:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 13:20:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 13:20:27,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 13:20:27,600 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 13:20:27,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:27,601 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 13:20:27,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 13:20:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 13:20:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 13:20:27,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:27,604 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:27,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:27,818 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:27,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:27,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 13:20:27,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:27,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799305204] [2020-07-21 13:20:27,820 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:27,896 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:27,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:27,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:20:27,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 13:20:27,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:28,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:28,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:28,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:28,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 13:20:28,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799305204] [2020-07-21 13:20:28,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:28,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 13:20:28,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024449216] [2020-07-21 13:20:28,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 13:20:28,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:28,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 13:20:28,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 13:20:28,945 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 13:20:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:29,175 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 13:20:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:20:29,176 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 13:20:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:29,178 INFO L225 Difference]: With dead ends: 76 [2020-07-21 13:20:29,178 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 13:20:29,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:20:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 13:20:29,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 13:20:29,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 13:20:29,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 13:20:29,209 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 13:20:29,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:29,210 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 13:20:29,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 13:20:29,210 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 13:20:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 13:20:29,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:29,215 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:29,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:29,430 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:29,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:29,431 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 13:20:29,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:29,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227931986] [2020-07-21 13:20:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:29,538 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:29,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:29,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:20:29,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 13:20:29,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:30,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:30,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:30,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:31,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:31,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:31,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:31,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:31,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 13:20:31,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227931986] [2020-07-21 13:20:31,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:31,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 13:20:31,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125106128] [2020-07-21 13:20:31,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 13:20:31,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:31,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 13:20:31,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 13:20:31,333 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 13:20:31,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:31,608 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 13:20:31,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:20:31,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 13:20:31,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:31,618 INFO L225 Difference]: With dead ends: 81 [2020-07-21 13:20:31,618 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 13:20:31,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 13:20:31,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 13:20:31,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 13:20:31,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 13:20:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 13:20:31,645 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 13:20:31,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:31,651 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 13:20:31,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 13:20:31,651 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 13:20:31,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 13:20:31,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:31,654 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:31,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:31,856 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:31,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:31,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 13:20:31,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:31,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928405952] [2020-07-21 13:20:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:31,945 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:31,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:31,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:20:31,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 13:20:32,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:32,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:33,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:33,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:33,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:33,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:33,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:33,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 13:20:33,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928405952] [2020-07-21 13:20:33,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:33,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 13:20:33,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054632114] [2020-07-21 13:20:33,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 13:20:33,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:33,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 13:20:33,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 13:20:33,467 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 13:20:33,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:33,756 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 13:20:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:20:33,757 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 13:20:33,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:33,760 INFO L225 Difference]: With dead ends: 86 [2020-07-21 13:20:33,760 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 13:20:33,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 13:20:33,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 13:20:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 13:20:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 13:20:33,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 13:20:33,773 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 13:20:33,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:33,773 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 13:20:33,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 13:20:33,773 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 13:20:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 13:20:33,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:33,776 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:33,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:33,991 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:33,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:33,992 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 13:20:33,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:33,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17740583] [2020-07-21 13:20:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:34,127 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:34,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:34,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:20:34,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 13:20:34,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:35,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:35,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:36,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:36,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:36,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:36,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:36,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:36,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:36,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:36,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:36,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 13:20:36,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17740583] [2020-07-21 13:20:36,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:36,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 13:20:36,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978340816] [2020-07-21 13:20:36,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 13:20:36,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:36,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 13:20:36,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:20:36,580 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 13:20:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:36,993 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 13:20:36,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:20:36,994 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 13:20:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:36,997 INFO L225 Difference]: With dead ends: 91 [2020-07-21 13:20:36,998 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 13:20:36,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 13:20:36,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 13:20:37,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 13:20:37,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 13:20:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 13:20:37,011 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 13:20:37,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:37,012 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 13:20:37,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 13:20:37,012 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 13:20:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 13:20:37,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:37,016 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:37,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:37,230 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:37,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:37,231 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 13:20:37,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:37,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801541091] [2020-07-21 13:20:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:37,395 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:37,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:37,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:20:37,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 13:20:37,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:38,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:39,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:39,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:39,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:39,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:39,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:39,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:39,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 13:20:39,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801541091] [2020-07-21 13:20:39,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:39,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:20:39,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930815178] [2020-07-21 13:20:39,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:20:39,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:39,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:20:39,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:20:39,921 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 19 states. [2020-07-21 13:20:40,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:40,278 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 13:20:40,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:20:40,279 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 201 [2020-07-21 13:20:40,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:40,282 INFO L225 Difference]: With dead ends: 96 [2020-07-21 13:20:40,282 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 13:20:40,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:20:40,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 13:20:40,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 13:20:40,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 13:20:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 13:20:40,294 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 13:20:40,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:40,295 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 13:20:40,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:20:40,295 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 13:20:40,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 13:20:40,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:40,301 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:40,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:40,516 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:40,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:40,517 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 13:20:40,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:40,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994144218] [2020-07-21 13:20:40,518 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:40,740 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:40,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:40,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:20:40,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 13:20:40,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:42,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:42,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:43,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:43,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:44,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:44,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:44,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:44,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:44,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:44,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:44,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 13:20:44,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994144218] [2020-07-21 13:20:44,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:44,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 13:20:44,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837753360] [2020-07-21 13:20:44,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:20:44,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:44,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:20:44,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:20:44,712 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 21 states. [2020-07-21 13:20:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:45,179 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 13:20:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:20:45,180 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 351 [2020-07-21 13:20:45,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:45,183 INFO L225 Difference]: With dead ends: 101 [2020-07-21 13:20:45,184 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 13:20:45,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:20:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 13:20:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 13:20:45,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 13:20:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 13:20:45,198 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 13:20:45,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:45,199 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 13:20:45,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:20:45,199 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 13:20:45,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-07-21 13:20:45,201 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:45,202 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 19, 17, 17, 13, 13, 13, 13, 13, 13, 13, 13, 11, 8, 8, 8, 8, 8, 8, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:45,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:45,417 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:45,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:45,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1494010988, now seen corresponding path program 3 times [2020-07-21 13:20:45,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:45,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744565585] [2020-07-21 13:20:45,419 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:45,636 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:45,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:45,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:20:45,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 533 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-21 13:20:45,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:47,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:47,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:47,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:47,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:48,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:48,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:48,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:48,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:48,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:48,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 554 refuted. 0 times theorem prover too weak. 1839 trivial. 0 not checked. [2020-07-21 13:20:48,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744565585] [2020-07-21 13:20:48,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:48,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:20:48,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728707346] [2020-07-21 13:20:48,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:20:48,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:48,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:20:48,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:20:48,692 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 19 states. [2020-07-21 13:20:49,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:49,115 INFO L93 Difference]: Finished difference Result 129 states and 362 transitions. [2020-07-21 13:20:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:20:49,116 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 297 [2020-07-21 13:20:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:49,120 INFO L225 Difference]: With dead ends: 129 [2020-07-21 13:20:49,120 INFO L226 Difference]: Without dead ends: 125 [2020-07-21 13:20:49,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:20:49,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-21 13:20:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 67. [2020-07-21 13:20:49,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 13:20:49,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 120 transitions. [2020-07-21 13:20:49,157 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 120 transitions. Word has length 297 [2020-07-21 13:20:49,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:49,160 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 120 transitions. [2020-07-21 13:20:49,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:20:49,160 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 120 transitions. [2020-07-21 13:20:49,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-21 13:20:49,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:49,164 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 25, 25, 25, 23, 17, 17, 17, 17, 17, 17, 17, 12, 12, 12, 12, 12, 12, 12, 11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:49,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:49,377 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:49,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:49,378 INFO L82 PathProgramCache]: Analyzing trace with hash -948476032, now seen corresponding path program 1 times [2020-07-21 13:20:49,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:49,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987394248] [2020-07-21 13:20:49,379 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:49,638 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:49,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:49,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:20:49,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 707 refuted. 0 times theorem prover too weak. 3930 trivial. 0 not checked. [2020-07-21 13:20:49,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:51,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:51,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:51,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:51,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:51,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:52,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 723 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2020-07-21 13:20:52,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987394248] [2020-07-21 13:20:52,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:52,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:20:52,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133663239] [2020-07-21 13:20:52,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:20:52,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:52,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:20:52,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:20:52,137 INFO L87 Difference]: Start difference. First operand 67 states and 120 transitions. Second operand 17 states. [2020-07-21 13:20:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:52,463 INFO L93 Difference]: Finished difference Result 139 states and 413 transitions. [2020-07-21 13:20:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:20:52,464 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 409 [2020-07-21 13:20:52,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:52,468 INFO L225 Difference]: With dead ends: 139 [2020-07-21 13:20:52,468 INFO L226 Difference]: Without dead ends: 135 [2020-07-21 13:20:52,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 790 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:20:52,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-21 13:20:52,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 69. [2020-07-21 13:20:52,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 13:20:52,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 127 transitions. [2020-07-21 13:20:52,486 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 127 transitions. Word has length 409 [2020-07-21 13:20:52,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:52,486 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 127 transitions. [2020-07-21 13:20:52,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:20:52,487 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 127 transitions. [2020-07-21 13:20:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-07-21 13:20:52,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:52,492 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 33, 33, 32, 30, 22, 22, 22, 22, 22, 22, 22, 16, 16, 16, 16, 16, 16, 16, 14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:52,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:52,705 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:52,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1385064961, now seen corresponding path program 1 times [2020-07-21 13:20:52,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:52,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293533353] [2020-07-21 13:20:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:53,004 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:53,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:53,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:20:53,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 323 proven. 1216 refuted. 0 times theorem prover too weak. 6692 trivial. 0 not checked. [2020-07-21 13:20:53,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:20:55,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:56,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:56,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:57,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:57,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:57,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:57,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:57,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:57,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 327 proven. 1245 refuted. 0 times theorem prover too weak. 6659 trivial. 0 not checked. [2020-07-21 13:20:57,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293533353] [2020-07-21 13:20:57,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:57,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 13:20:57,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952860913] [2020-07-21 13:20:57,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:20:57,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:57,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:20:57,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:20:57,701 INFO L87 Difference]: Start difference. First operand 69 states and 127 transitions. Second operand 21 states. [2020-07-21 13:20:58,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:58,238 INFO L93 Difference]: Finished difference Result 166 states and 566 transitions. [2020-07-21 13:20:58,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:20:58,238 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 531 [2020-07-21 13:20:58,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:58,241 INFO L225 Difference]: With dead ends: 166 [2020-07-21 13:20:58,241 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 13:20:58,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 1025 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:20:58,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 13:20:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-07-21 13:20:58,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-21 13:20:58,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 146 transitions. [2020-07-21 13:20:58,256 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 146 transitions. Word has length 531 [2020-07-21 13:20:58,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:58,257 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 146 transitions. [2020-07-21 13:20:58,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:20:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 146 transitions. [2020-07-21 13:20:58,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-07-21 13:20:58,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:58,261 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 25, 24, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:58,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:58,476 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:58,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1214630406, now seen corresponding path program 2 times [2020-07-21 13:20:58,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:58,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426141317] [2020-07-21 13:20:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:58,822 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:58,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:58,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:20:58,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:20:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 884 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2020-07-21 13:20:59,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:21:00,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:00,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:01,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:01,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:01,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:01,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:01,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:02,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:02,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 905 refuted. 0 times theorem prover too weak. 4819 trivial. 0 not checked. [2020-07-21 13:21:02,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426141317] [2020-07-21 13:21:02,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:21:02,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:21:02,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457071418] [2020-07-21 13:21:02,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:21:02,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:21:02,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:21:02,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:21:02,271 INFO L87 Difference]: Start difference. First operand 88 states and 146 transitions. Second operand 19 states. [2020-07-21 13:21:02,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:21:02,658 INFO L93 Difference]: Finished difference Result 167 states and 414 transitions. [2020-07-21 13:21:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:21:02,659 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 458 [2020-07-21 13:21:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:21:02,664 INFO L225 Difference]: With dead ends: 167 [2020-07-21 13:21:02,664 INFO L226 Difference]: Without dead ends: 153 [2020-07-21 13:21:02,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 883 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:21:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-21 13:21:02,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 94. [2020-07-21 13:21:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 13:21:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 160 transitions. [2020-07-21 13:21:02,684 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 160 transitions. Word has length 458 [2020-07-21 13:21:02,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:21:02,684 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 160 transitions. [2020-07-21 13:21:02,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:21:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 160 transitions. [2020-07-21 13:21:02,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-07-21 13:21:02,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:21:02,689 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 25, 23, 19, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:21:02,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:02,902 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:21:02,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:21:02,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1610364731, now seen corresponding path program 3 times [2020-07-21 13:21:02,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:21:02,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437088926] [2020-07-21 13:21:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:03,209 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:21:03,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:21:03,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:21:03,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:21:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 283 proven. 712 refuted. 0 times theorem prover too weak. 2769 trivial. 0 not checked. [2020-07-21 13:21:03,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:21:05,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:05,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:06,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:06,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:06,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:06,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:06,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:06,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:07,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:07,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:07,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:07,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:07,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:07,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:07,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 285 proven. 743 refuted. 0 times theorem prover too weak. 2736 trivial. 0 not checked. [2020-07-21 13:21:07,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437088926] [2020-07-21 13:21:07,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:21:07,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 13:21:07,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575115082] [2020-07-21 13:21:07,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:21:07,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:21:07,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:21:07,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:21:07,435 INFO L87 Difference]: Start difference. First operand 94 states and 160 transitions. Second operand 21 states. [2020-07-21 13:21:08,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:21:08,006 INFO L93 Difference]: Finished difference Result 191 states and 508 transitions. [2020-07-21 13:21:08,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:21:08,006 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 367 [2020-07-21 13:21:08,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:21:08,010 INFO L225 Difference]: With dead ends: 191 [2020-07-21 13:21:08,010 INFO L226 Difference]: Without dead ends: 105 [2020-07-21 13:21:08,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 697 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:21:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-21 13:21:08,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-07-21 13:21:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-21 13:21:08,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 171 transitions. [2020-07-21 13:21:08,026 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 171 transitions. Word has length 367 [2020-07-21 13:21:08,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:21:08,027 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 171 transitions. [2020-07-21 13:21:08,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:21:08,027 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 171 transitions. [2020-07-21 13:21:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2020-07-21 13:21:08,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:21:08,031 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 25, 25, 21, 21, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:21:08,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:08,246 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:21:08,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:21:08,247 INFO L82 PathProgramCache]: Analyzing trace with hash -390845590, now seen corresponding path program 4 times [2020-07-21 13:21:08,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:21:08,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117901664] [2020-07-21 13:21:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:08,561 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:21:08,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:21:08,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:21:08,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:21:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4044 backedges. 186 proven. 611 refuted. 0 times theorem prover too weak. 3247 trivial. 0 not checked. [2020-07-21 13:21:08,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:21:10,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:10,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:10,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:10,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:10,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:10,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:10,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:10,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:11,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4044 backedges. 186 proven. 627 refuted. 0 times theorem prover too weak. 3231 trivial. 0 not checked. [2020-07-21 13:21:11,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117901664] [2020-07-21 13:21:11,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:21:11,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:21:11,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600518529] [2020-07-21 13:21:11,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:21:11,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:21:11,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:21:11,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:21:11,152 INFO L87 Difference]: Start difference. First operand 99 states and 171 transitions. Second operand 17 states. [2020-07-21 13:21:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:21:11,445 INFO L93 Difference]: Finished difference Result 178 states and 428 transitions. [2020-07-21 13:21:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:21:11,446 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 379 [2020-07-21 13:21:11,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:21:11,450 INFO L225 Difference]: With dead ends: 178 [2020-07-21 13:21:11,450 INFO L226 Difference]: Without dead ends: 163 [2020-07-21 13:21:11,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 729 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:21:11,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-21 13:21:11,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 106. [2020-07-21 13:21:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-21 13:21:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 192 transitions. [2020-07-21 13:21:11,468 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 192 transitions. Word has length 379 [2020-07-21 13:21:11,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:21:11,469 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 192 transitions. [2020-07-21 13:21:11,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:21:11,469 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 192 transitions. [2020-07-21 13:21:11,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-07-21 13:21:11,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:21:11,474 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 21, 20, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:21:11,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:11,689 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:21:11,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:21:11,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1482231414, now seen corresponding path program 5 times [2020-07-21 13:21:11,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:21:11,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909414481] [2020-07-21 13:21:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:12,039 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:21:12,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:21:12,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:21:12,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:21:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 237 proven. 729 refuted. 0 times theorem prover too weak. 3590 trivial. 0 not checked. [2020-07-21 13:21:12,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:21:13,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:13,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:14,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:14,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:14,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:14,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:15,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:15,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:15,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:15,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 239 proven. 748 refuted. 0 times theorem prover too weak. 3569 trivial. 0 not checked. [2020-07-21 13:21:15,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909414481] [2020-07-21 13:21:15,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:21:15,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:21:15,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969364498] [2020-07-21 13:21:15,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:21:15,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:21:15,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:21:15,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:21:15,525 INFO L87 Difference]: Start difference. First operand 106 states and 192 transitions. Second operand 19 states. [2020-07-21 13:21:15,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:21:15,902 INFO L93 Difference]: Finished difference Result 172 states and 408 transitions. [2020-07-21 13:21:15,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:21:15,913 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 402 [2020-07-21 13:21:15,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:21:15,916 INFO L225 Difference]: With dead ends: 172 [2020-07-21 13:21:15,916 INFO L226 Difference]: Without dead ends: 157 [2020-07-21 13:21:15,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 771 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:21:15,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-21 13:21:15,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 109. [2020-07-21 13:21:15,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 13:21:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-21 13:21:15,941 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 402 [2020-07-21 13:21:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:21:15,942 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-21 13:21:15,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:21:15,942 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-21 13:21:15,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-07-21 13:21:15,947 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:21:15,948 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 27, 23, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:21:16,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:16,162 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:21:16,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:21:16,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1545328541, now seen corresponding path program 6 times [2020-07-21 13:21:16,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:21:16,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125666081] [2020-07-21 13:21:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:16,593 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:21:16,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:21:16,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:21:16,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:21:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5660 backedges. 244 proven. 693 refuted. 0 times theorem prover too weak. 4723 trivial. 0 not checked. [2020-07-21 13:21:16,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:21:18,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:18,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:18,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:19,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:19,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:19,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:19,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:19,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5660 backedges. 244 proven. 707 refuted. 0 times theorem prover too weak. 4709 trivial. 0 not checked. [2020-07-21 13:21:19,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125666081] [2020-07-21 13:21:19,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:21:19,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:21:19,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685199506] [2020-07-21 13:21:19,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:21:19,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:21:19,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:21:19,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:21:19,614 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-21 13:21:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:21:19,953 INFO L93 Difference]: Finished difference Result 190 states and 442 transitions. [2020-07-21 13:21:19,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:21:19,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 447 [2020-07-21 13:21:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:21:19,960 INFO L225 Difference]: With dead ends: 190 [2020-07-21 13:21:19,960 INFO L226 Difference]: Without dead ends: 178 [2020-07-21 13:21:19,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 865 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:21:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-21 13:21:19,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 109. [2020-07-21 13:21:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 13:21:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-21 13:21:19,984 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 447 [2020-07-21 13:21:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:21:19,985 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-21 13:21:19,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:21:19,985 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-21 13:21:19,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 13:21:19,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:21:19,989 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 22, 22, 20, 18, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 9, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:21:20,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:20,203 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:21:20,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:21:20,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1086306760, now seen corresponding path program 7 times [2020-07-21 13:21:20,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:21:20,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051945388] [2020-07-21 13:21:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:20,565 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:21:20,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:21:20,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:21:20,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:21:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2951 backedges. 241 proven. 424 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-21 13:21:20,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:21:22,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:22,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:22,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:22,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:22,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:22,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:22,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:23,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2951 backedges. 243 proven. 438 refuted. 0 times theorem prover too weak. 2270 trivial. 0 not checked. [2020-07-21 13:21:23,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051945388] [2020-07-21 13:21:23,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:21:23,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:21:23,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143901135] [2020-07-21 13:21:23,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:21:23,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:21:23,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:21:23,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:21:23,024 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-21 13:21:23,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:21:23,290 INFO L93 Difference]: Finished difference Result 156 states and 320 transitions. [2020-07-21 13:21:23,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:21:23,291 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 327 [2020-07-21 13:21:23,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:21:23,294 INFO L225 Difference]: With dead ends: 156 [2020-07-21 13:21:23,295 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 13:21:23,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 625 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:21:23,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 13:21:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2020-07-21 13:21:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 13:21:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 230 transitions. [2020-07-21 13:21:23,312 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 230 transitions. Word has length 327 [2020-07-21 13:21:23,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:21:23,312 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 230 transitions. [2020-07-21 13:21:23,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:21:23,312 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 230 transitions. [2020-07-21 13:21:23,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2020-07-21 13:21:23,319 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:21:23,319 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 38, 38, 35, 32, 24, 24, 24, 24, 24, 24, 24, 19, 19, 19, 19, 19, 19, 19, 16, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:21:23,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:23,533 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:21:23,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:21:23,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1906084546, now seen corresponding path program 8 times [2020-07-21 13:21:23,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:21:23,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216557067] [2020-07-21 13:21:23,535 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:23,968 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:21:23,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:21:23,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1325 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:21:23,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:21:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10395 backedges. 354 proven. 1164 refuted. 0 times theorem prover too weak. 8877 trivial. 0 not checked. [2020-07-21 13:21:24,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:21:26,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:27,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:27,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:27,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:27,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:27,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:27,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:27,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:27,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:27,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:28,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10395 backedges. 356 proven. 1183 refuted. 0 times theorem prover too weak. 8856 trivial. 0 not checked. [2020-07-21 13:21:28,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216557067] [2020-07-21 13:21:28,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:21:28,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:21:28,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569329531] [2020-07-21 13:21:28,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:21:28,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:21:28,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:21:28,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:21:28,412 INFO L87 Difference]: Start difference. First operand 121 states and 230 transitions. Second operand 19 states. [2020-07-21 13:21:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:21:28,829 INFO L93 Difference]: Finished difference Result 159 states and 322 transitions. [2020-07-21 13:21:28,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:21:28,830 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 596 [2020-07-21 13:21:28,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:21:28,837 INFO L225 Difference]: With dead ends: 159 [2020-07-21 13:21:28,837 INFO L226 Difference]: Without dead ends: 150 [2020-07-21 13:21:28,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1198 GetRequests, 1159 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:21:28,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-21 13:21:28,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 120. [2020-07-21 13:21:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-21 13:21:28,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 218 transitions. [2020-07-21 13:21:28,857 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 218 transitions. Word has length 596 [2020-07-21 13:21:28,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:21:28,858 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 218 transitions. [2020-07-21 13:21:28,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:21:28,858 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 218 transitions. [2020-07-21 13:21:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-07-21 13:21:28,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:21:28,863 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 25, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:21:29,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:29,078 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:21:29,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:21:29,079 INFO L82 PathProgramCache]: Analyzing trace with hash -2126389129, now seen corresponding path program 9 times [2020-07-21 13:21:29,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:21:29,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131926738] [2020-07-21 13:21:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:29,492 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:21:29,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:21:29,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:21:29,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:21:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5656 backedges. 294 proven. 639 refuted. 0 times theorem prover too weak. 4723 trivial. 0 not checked. [2020-07-21 13:21:29,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:21:31,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:31,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:31,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:31,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:31,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:32,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:32,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:32,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:32,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:32,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:32,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:32,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5656 backedges. 294 proven. 655 refuted. 0 times theorem prover too weak. 4707 trivial. 0 not checked. [2020-07-21 13:21:32,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131926738] [2020-07-21 13:21:32,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:21:32,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:21:32,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53121273] [2020-07-21 13:21:32,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:21:32,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:21:32,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:21:32,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:21:32,504 INFO L87 Difference]: Start difference. First operand 120 states and 218 transitions. Second operand 17 states. [2020-07-21 13:21:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:21:32,839 INFO L93 Difference]: Finished difference Result 171 states and 354 transitions. [2020-07-21 13:21:32,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:21:32,840 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 447 [2020-07-21 13:21:32,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:21:32,843 INFO L225 Difference]: With dead ends: 171 [2020-07-21 13:21:32,843 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 13:21:32,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 865 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:21:32,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 13:21:32,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2020-07-21 13:21:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-21 13:21:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 206 transitions. [2020-07-21 13:21:32,859 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 206 transitions. Word has length 447 [2020-07-21 13:21:32,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:21:32,860 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 206 transitions. [2020-07-21 13:21:32,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:21:32,860 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 206 transitions. [2020-07-21 13:21:32,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-21 13:21:32,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:21:32,865 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 26, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:21:33,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:33,081 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:21:33,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:21:33,082 INFO L82 PathProgramCache]: Analyzing trace with hash 280776720, now seen corresponding path program 10 times [2020-07-21 13:21:33,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:21:33,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071776095] [2020-07-21 13:21:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:33,515 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:21:33,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:21:33,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:21:33,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:21:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 266 proven. 517 refuted. 0 times theorem prover too weak. 4594 trivial. 0 not checked. [2020-07-21 13:21:33,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:21:34,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:35,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:35,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:35,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:35,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:35,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:35,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:35,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 266 proven. 527 refuted. 0 times theorem prover too weak. 4584 trivial. 0 not checked. [2020-07-21 13:21:35,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071776095] [2020-07-21 13:21:35,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:21:35,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:21:35,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898433307] [2020-07-21 13:21:35,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:21:35,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:21:35,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:21:35,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:21:35,999 INFO L87 Difference]: Start difference. First operand 114 states and 206 transitions. Second operand 15 states. [2020-07-21 13:21:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:21:36,258 INFO L93 Difference]: Finished difference Result 196 states and 493 transitions. [2020-07-21 13:21:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:21:36,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 436 [2020-07-21 13:21:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:21:36,264 INFO L225 Difference]: With dead ends: 196 [2020-07-21 13:21:36,265 INFO L226 Difference]: Without dead ends: 187 [2020-07-21 13:21:36,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 847 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:21:36,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-21 13:21:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 116. [2020-07-21 13:21:36,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-21 13:21:36,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 214 transitions. [2020-07-21 13:21:36,285 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 214 transitions. Word has length 436 [2020-07-21 13:21:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:21:36,285 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 214 transitions. [2020-07-21 13:21:36,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:21:36,286 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 214 transitions. [2020-07-21 13:21:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-07-21 13:21:36,290 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:21:36,290 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 29, 24, 23, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 10, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:21:36,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:36,504 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:21:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:21:36,505 INFO L82 PathProgramCache]: Analyzing trace with hash -399844557, now seen corresponding path program 11 times [2020-07-21 13:21:36,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:21:36,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697067207] [2020-07-21 13:21:36,506 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:36,926 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:21:36,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:21:36,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:21:36,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:21:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4981 backedges. 401 proven. 493 refuted. 0 times theorem prover too weak. 4087 trivial. 0 not checked. [2020-07-21 13:21:37,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:21:38,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:39,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:39,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:39,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:39,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:39,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:39,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:39,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4981 backedges. 403 proven. 507 refuted. 0 times theorem prover too weak. 4071 trivial. 0 not checked. [2020-07-21 13:21:39,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697067207] [2020-07-21 13:21:39,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:21:39,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:21:39,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162674765] [2020-07-21 13:21:39,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:21:39,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:21:39,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:21:39,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:21:39,957 INFO L87 Difference]: Start difference. First operand 116 states and 214 transitions. Second operand 17 states. [2020-07-21 13:21:40,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:21:40,250 INFO L93 Difference]: Finished difference Result 168 states and 369 transitions. [2020-07-21 13:21:40,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:21:40,251 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 420 [2020-07-21 13:21:40,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:21:40,255 INFO L225 Difference]: With dead ends: 168 [2020-07-21 13:21:40,255 INFO L226 Difference]: Without dead ends: 159 [2020-07-21 13:21:40,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 811 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:21:40,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-21 13:21:40,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 136. [2020-07-21 13:21:40,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-21 13:21:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 278 transitions. [2020-07-21 13:21:40,277 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 278 transitions. Word has length 420 [2020-07-21 13:21:40,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:21:40,277 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 278 transitions. [2020-07-21 13:21:40,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:21:40,278 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 278 transitions. [2020-07-21 13:21:40,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2020-07-21 13:21:40,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:21:40,284 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 34, 28, 27, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 14, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:21:40,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:40,499 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:21:40,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:21:40,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1318222248, now seen corresponding path program 12 times [2020-07-21 13:21:40,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:21:40,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665625241] [2020-07-21 13:21:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:40,940 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:21:40,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:21:40,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:21:40,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:21:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7557 backedges. 676 proven. 779 refuted. 0 times theorem prover too weak. 6102 trivial. 0 not checked. [2020-07-21 13:21:41,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:21:43,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:43,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:44,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:44,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:44,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:45,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:45,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:45,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:45,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:45,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:45,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7557 backedges. 676 proven. 812 refuted. 0 times theorem prover too weak. 6069 trivial. 0 not checked. [2020-07-21 13:21:46,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665625241] [2020-07-21 13:21:46,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:21:46,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 13:21:46,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121886759] [2020-07-21 13:21:46,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:21:46,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:21:46,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:21:46,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:21:46,217 INFO L87 Difference]: Start difference. First operand 136 states and 278 transitions. Second operand 21 states. [2020-07-21 13:21:46,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:21:46,803 INFO L93 Difference]: Finished difference Result 186 states and 402 transitions. [2020-07-21 13:21:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:21:46,805 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 512 [2020-07-21 13:21:46,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:21:46,808 INFO L225 Difference]: With dead ends: 186 [2020-07-21 13:21:46,808 INFO L226 Difference]: Without dead ends: 168 [2020-07-21 13:21:46,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1031 GetRequests, 987 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:21:46,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-21 13:21:46,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2020-07-21 13:21:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-21 13:21:46,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 337 transitions. [2020-07-21 13:21:46,831 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 337 transitions. Word has length 512 [2020-07-21 13:21:46,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:21:46,832 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 337 transitions. [2020-07-21 13:21:46,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:21:46,832 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 337 transitions. [2020-07-21 13:21:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-21 13:21:46,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:21:46,839 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 28, 28, 26, 24, 17, 17, 17, 17, 17, 17, 17, 14, 14, 14, 14, 14, 14, 14, 12, 9, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:21:47,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:47,056 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:21:47,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:21:47,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1579734348, now seen corresponding path program 13 times [2020-07-21 13:21:47,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:21:47,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668368944] [2020-07-21 13:21:47,057 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:47,647 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:21:47,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:21:47,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:21:47,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:21:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5401 backedges. 442 proven. 765 refuted. 0 times theorem prover too weak. 4194 trivial. 0 not checked. [2020-07-21 13:21:47,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:21:50,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:51,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:51,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:51,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:52,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:52,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:52,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:52,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5401 backedges. 444 proven. 796 refuted. 0 times theorem prover too weak. 4161 trivial. 0 not checked. [2020-07-21 13:21:52,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668368944] [2020-07-21 13:21:52,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:21:52,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 13:21:52,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207774973] [2020-07-21 13:21:52,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:21:52,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:21:52,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:21:52,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:21:52,529 INFO L87 Difference]: Start difference. First operand 162 states and 337 transitions. Second operand 21 states. [2020-07-21 13:21:53,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:21:53,172 INFO L93 Difference]: Finished difference Result 187 states and 381 transitions. [2020-07-21 13:21:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:21:53,174 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 435 [2020-07-21 13:21:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:21:53,177 INFO L225 Difference]: With dead ends: 187 [2020-07-21 13:21:53,177 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 13:21:53,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 833 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:21:53,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 13:21:53,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 152. [2020-07-21 13:21:53,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-21 13:21:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 300 transitions. [2020-07-21 13:21:53,202 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 300 transitions. Word has length 435 [2020-07-21 13:21:53,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:21:53,202 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 300 transitions. [2020-07-21 13:21:53,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:21:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 300 transitions. [2020-07-21 13:21:53,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 13:21:53,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:21:53,212 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 32, 32, 25, 24, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 15, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:21:53,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:53,426 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:21:53,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:21:53,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1340678970, now seen corresponding path program 14 times [2020-07-21 13:21:53,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:21:53,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277412284] [2020-07-21 13:21:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:53,984 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:21:53,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:21:53,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:21:53,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:21:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6688 backedges. 520 proven. 674 refuted. 0 times theorem prover too weak. 5494 trivial. 0 not checked. [2020-07-21 13:21:54,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:21:56,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:56,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:56,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:57,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:57,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:57,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:57,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:57,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:57,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6688 backedges. 524 proven. 691 refuted. 0 times theorem prover too weak. 5473 trivial. 0 not checked. [2020-07-21 13:21:58,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277412284] [2020-07-21 13:21:58,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:21:58,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:21:58,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584928352] [2020-07-21 13:21:58,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:21:58,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:21:58,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:21:58,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:21:58,052 INFO L87 Difference]: Start difference. First operand 152 states and 300 transitions. Second operand 19 states. [2020-07-21 13:21:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:21:58,423 INFO L93 Difference]: Finished difference Result 205 states and 442 transitions. [2020-07-21 13:21:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:21:58,425 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 482 [2020-07-21 13:21:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:21:58,429 INFO L225 Difference]: With dead ends: 205 [2020-07-21 13:21:58,429 INFO L226 Difference]: Without dead ends: 196 [2020-07-21 13:21:58,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 931 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:21:58,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-07-21 13:21:58,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 148. [2020-07-21 13:21:58,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-21 13:21:58,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 283 transitions. [2020-07-21 13:21:58,452 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 283 transitions. Word has length 482 [2020-07-21 13:21:58,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:21:58,453 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 283 transitions. [2020-07-21 13:21:58,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:21:58,453 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 283 transitions. [2020-07-21 13:21:58,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-07-21 13:21:58,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:21:58,459 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 26, 26, 22, 21, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 9, 7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:21:58,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:58,675 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:21:58,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:21:58,675 INFO L82 PathProgramCache]: Analyzing trace with hash 717584092, now seen corresponding path program 15 times [2020-07-21 13:21:58,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:21:58,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647918560] [2020-07-21 13:21:58,676 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:59,159 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:21:59,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:21:59,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:21:59,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:21:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4041 backedges. 396 proven. 380 refuted. 0 times theorem prover too weak. 3265 trivial. 0 not checked. [2020-07-21 13:21:59,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:22:00,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:01,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:01,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:01,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:01,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:01,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:01,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:01,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:01,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:01,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:01,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4041 backedges. 398 proven. 392 refuted. 0 times theorem prover too weak. 3251 trivial. 0 not checked. [2020-07-21 13:22:02,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647918560] [2020-07-21 13:22:02,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:22:02,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:22:02,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972714028] [2020-07-21 13:22:02,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:22:02,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:22:02,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:22:02,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:22:02,026 INFO L87 Difference]: Start difference. First operand 148 states and 283 transitions. Second operand 17 states. [2020-07-21 13:22:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:22:02,358 INFO L93 Difference]: Finished difference Result 231 states and 517 transitions. [2020-07-21 13:22:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:22:02,359 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 380 [2020-07-21 13:22:02,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:22:02,364 INFO L225 Difference]: With dead ends: 231 [2020-07-21 13:22:02,365 INFO L226 Difference]: Without dead ends: 222 [2020-07-21 13:22:02,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 731 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:22:02,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-21 13:22:02,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 143. [2020-07-21 13:22:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-07-21 13:22:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 264 transitions. [2020-07-21 13:22:02,388 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 264 transitions. Word has length 380 [2020-07-21 13:22:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:22:02,389 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 264 transitions. [2020-07-21 13:22:02,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:22:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 264 transitions. [2020-07-21 13:22:02,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-07-21 13:22:02,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:22:02,395 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 26, 26, 24, 22, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 13, 11, 7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:22:02,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:02,614 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:22:02,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:22:02,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1282091601, now seen corresponding path program 16 times [2020-07-21 13:22:02,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:22:02,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168359273] [2020-07-21 13:22:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:03,116 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:22:03,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:22:03,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:22:03,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:22:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 391 proven. 577 refuted. 0 times theorem prover too weak. 3431 trivial. 0 not checked. [2020-07-21 13:22:03,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:22:05,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:05,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:06,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:06,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:06,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:06,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:06,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:06,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:06,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 395 proven. 597 refuted. 0 times theorem prover too weak. 3407 trivial. 0 not checked. [2020-07-21 13:22:06,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168359273] [2020-07-21 13:22:06,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:22:06,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:22:06,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645423391] [2020-07-21 13:22:06,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:22:06,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:22:06,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:22:06,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:22:06,886 INFO L87 Difference]: Start difference. First operand 143 states and 264 transitions. Second operand 19 states. [2020-07-21 13:22:07,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:22:07,382 INFO L93 Difference]: Finished difference Result 203 states and 406 transitions. [2020-07-21 13:22:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:22:07,383 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 395 [2020-07-21 13:22:07,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:22:07,387 INFO L225 Difference]: With dead ends: 203 [2020-07-21 13:22:07,387 INFO L226 Difference]: Without dead ends: 169 [2020-07-21 13:22:07,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 757 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:22:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-21 13:22:07,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 163. [2020-07-21 13:22:07,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 13:22:07,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 311 transitions. [2020-07-21 13:22:07,406 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 311 transitions. Word has length 395 [2020-07-21 13:22:07,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:22:07,407 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 311 transitions. [2020-07-21 13:22:07,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:22:07,407 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 311 transitions. [2020-07-21 13:22:07,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-07-21 13:22:07,412 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:22:07,413 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 24, 24, 22, 21, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 10, 7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:22:07,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:07,626 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:22:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:22:07,627 INFO L82 PathProgramCache]: Analyzing trace with hash 463740321, now seen corresponding path program 17 times [2020-07-21 13:22:07,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:22:07,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606741766] [2020-07-21 13:22:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:08,146 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:22:08,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:22:08,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:22:08,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:22:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 349 proven. 300 refuted. 0 times theorem prover too weak. 3148 trivial. 0 not checked. [2020-07-21 13:22:08,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:22:09,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:09,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:09,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:09,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:09,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:09,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:10,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 349 proven. 312 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2020-07-21 13:22:10,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606741766] [2020-07-21 13:22:10,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:22:10,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:22:10,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028423219] [2020-07-21 13:22:10,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:22:10,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:22:10,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:22:10,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:22:10,484 INFO L87 Difference]: Start difference. First operand 163 states and 311 transitions. Second operand 15 states. [2020-07-21 13:22:10,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:22:10,766 INFO L93 Difference]: Finished difference Result 289 states and 700 transitions. [2020-07-21 13:22:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:22:10,767 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 368 [2020-07-21 13:22:10,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:22:10,773 INFO L225 Difference]: With dead ends: 289 [2020-07-21 13:22:10,773 INFO L226 Difference]: Without dead ends: 280 [2020-07-21 13:22:10,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 711 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:22:10,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-07-21 13:22:10,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 160. [2020-07-21 13:22:10,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-21 13:22:10,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 302 transitions. [2020-07-21 13:22:10,802 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 302 transitions. Word has length 368 [2020-07-21 13:22:10,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:22:10,802 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 302 transitions. [2020-07-21 13:22:10,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:22:10,803 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 302 transitions. [2020-07-21 13:22:10,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-07-21 13:22:10,808 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:22:10,808 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 25, 23, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:22:11,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:11,022 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:22:11,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:22:11,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1920591461, now seen corresponding path program 18 times [2020-07-21 13:22:11,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:22:11,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763101578] [2020-07-21 13:22:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:11,565 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:22:11,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:22:11,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:22:11,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:22:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5609 backedges. 312 proven. 619 refuted. 0 times theorem prover too weak. 4678 trivial. 0 not checked. [2020-07-21 13:22:11,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:22:13,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:13,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:14,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:14,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:14,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:14,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:14,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:14,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:14,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:14,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:14,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:14,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5609 backedges. 314 proven. 631 refuted. 0 times theorem prover too weak. 4664 trivial. 0 not checked. [2020-07-21 13:22:14,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763101578] [2020-07-21 13:22:14,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:22:14,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:22:14,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866171958] [2020-07-21 13:22:14,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:22:14,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:22:14,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:22:14,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:22:14,800 INFO L87 Difference]: Start difference. First operand 160 states and 302 transitions. Second operand 17 states. [2020-07-21 13:22:15,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:22:15,098 INFO L93 Difference]: Finished difference Result 212 states and 424 transitions. [2020-07-21 13:22:15,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:22:15,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 445 [2020-07-21 13:22:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:22:15,103 INFO L225 Difference]: With dead ends: 212 [2020-07-21 13:22:15,103 INFO L226 Difference]: Without dead ends: 203 [2020-07-21 13:22:15,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 861 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:22:15,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-07-21 13:22:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 163. [2020-07-21 13:22:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 13:22:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 311 transitions. [2020-07-21 13:22:15,122 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 311 transitions. Word has length 445 [2020-07-21 13:22:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:22:15,122 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 311 transitions. [2020-07-21 13:22:15,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:22:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 311 transitions. [2020-07-21 13:22:15,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-07-21 13:22:15,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:22:15,126 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 24, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:22:15,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:15,327 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:22:15,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:22:15,328 INFO L82 PathProgramCache]: Analyzing trace with hash -2086091792, now seen corresponding path program 19 times [2020-07-21 13:22:15,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:22:15,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275705668] [2020-07-21 13:22:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:15,864 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:22:15,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:22:15,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:22:15,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:22:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4685 backedges. 570 proven. 425 refuted. 0 times theorem prover too weak. 3690 trivial. 0 not checked. [2020-07-21 13:22:16,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:22:18,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:18,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:18,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:18,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:19,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:19,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:19,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:19,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:19,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:19,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:19,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:19,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:19,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4685 backedges. 570 proven. 455 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2020-07-21 13:22:19,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275705668] [2020-07-21 13:22:19,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:22:19,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 13:22:19,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190597908] [2020-07-21 13:22:19,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 13:22:19,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:22:19,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 13:22:19,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:22:19,828 INFO L87 Difference]: Start difference. First operand 163 states and 311 transitions. Second operand 20 states. [2020-07-21 13:22:20,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:22:20,328 INFO L93 Difference]: Finished difference Result 290 states and 704 transitions. [2020-07-21 13:22:20,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:22:20,329 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 408 [2020-07-21 13:22:20,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:22:20,334 INFO L225 Difference]: With dead ends: 290 [2020-07-21 13:22:20,334 INFO L226 Difference]: Without dead ends: 272 [2020-07-21 13:22:20,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 783 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 13:22:20,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-07-21 13:22:20,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 177. [2020-07-21 13:22:20,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-21 13:22:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 368 transitions. [2020-07-21 13:22:20,360 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 368 transitions. Word has length 408 [2020-07-21 13:22:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:22:20,360 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 368 transitions. [2020-07-21 13:22:20,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 13:22:20,361 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 368 transitions. [2020-07-21 13:22:20,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-21 13:22:20,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:22:20,366 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 25, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:22:20,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:20,580 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:22:20,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:22:20,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2026057859, now seen corresponding path program 20 times [2020-07-21 13:22:20,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:22:20,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104555201] [2020-07-21 13:22:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:21,131 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:22:21,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:22:21,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:22:21,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:22:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 276 proven. 760 refuted. 0 times theorem prover too weak. 3980 trivial. 0 not checked. [2020-07-21 13:22:21,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:22:23,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:23,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:24,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:24,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:24,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:24,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:24,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:24,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:24,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:24,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:24,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:24,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:25,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 280 proven. 782 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2020-07-21 13:22:25,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104555201] [2020-07-21 13:22:25,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:22:25,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:22:25,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836816468] [2020-07-21 13:22:25,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:22:25,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:22:25,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:22:25,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:22:25,169 INFO L87 Difference]: Start difference. First operand 177 states and 368 transitions. Second operand 19 states. [2020-07-21 13:22:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:22:25,639 INFO L93 Difference]: Finished difference Result 284 states and 657 transitions. [2020-07-21 13:22:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:22:25,640 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 422 [2020-07-21 13:22:25,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:22:25,645 INFO L225 Difference]: With dead ends: 284 [2020-07-21 13:22:25,645 INFO L226 Difference]: Without dead ends: 210 [2020-07-21 13:22:25,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 811 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:22:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-21 13:22:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 177. [2020-07-21 13:22:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-21 13:22:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 348 transitions. [2020-07-21 13:22:25,670 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 348 transitions. Word has length 422 [2020-07-21 13:22:25,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:22:25,670 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 348 transitions. [2020-07-21 13:22:25,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:22:25,670 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 348 transitions. [2020-07-21 13:22:25,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-07-21 13:22:25,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:22:25,676 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 26, 26, 25, 21, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 12, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:22:25,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:25,891 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:22:25,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:22:25,892 INFO L82 PathProgramCache]: Analyzing trace with hash -551529366, now seen corresponding path program 21 times [2020-07-21 13:22:25,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:22:25,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292678928] [2020-07-21 13:22:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:26,456 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:22:26,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:22:26,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:22:26,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:22:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4110 backedges. 227 proven. 706 refuted. 0 times theorem prover too weak. 3177 trivial. 0 not checked. [2020-07-21 13:22:26,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:22:28,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:28,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:29,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:29,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:29,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:29,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:30,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:30,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:30,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:30,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:30,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:30,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4110 backedges. 235 proven. 722 refuted. 0 times theorem prover too weak. 3153 trivial. 0 not checked. [2020-07-21 13:22:30,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292678928] [2020-07-21 13:22:30,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:22:30,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:22:30,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413621717] [2020-07-21 13:22:30,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:22:30,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:22:30,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:22:30,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:22:30,451 INFO L87 Difference]: Start difference. First operand 177 states and 348 transitions. Second operand 19 states. [2020-07-21 13:22:30,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:22:30,965 INFO L93 Difference]: Finished difference Result 353 states and 876 transitions. [2020-07-21 13:22:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:22:30,967 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 383 [2020-07-21 13:22:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:22:30,971 INFO L225 Difference]: With dead ends: 353 [2020-07-21 13:22:30,972 INFO L226 Difference]: Without dead ends: 217 [2020-07-21 13:22:30,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 733 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:22:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-07-21 13:22:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 174. [2020-07-21 13:22:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-07-21 13:22:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 335 transitions. [2020-07-21 13:22:31,002 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 335 transitions. Word has length 383 [2020-07-21 13:22:31,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:22:31,003 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 335 transitions. [2020-07-21 13:22:31,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:22:31,003 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 335 transitions. [2020-07-21 13:22:31,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2020-07-21 13:22:31,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:22:31,010 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 38, 38, 32, 31, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 12, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:22:31,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:31,225 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:22:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:22:31,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1270821826, now seen corresponding path program 22 times [2020-07-21 13:22:31,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:22:31,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664735150] [2020-07-21 13:22:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:31,850 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:22:31,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:22:31,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:22:31,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:22:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8497 backedges. 413 proven. 583 refuted. 0 times theorem prover too weak. 7501 trivial. 0 not checked. [2020-07-21 13:22:32,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:22:34,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:34,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:34,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:34,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:34,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:34,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:34,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:34,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:34,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8497 backedges. 415 proven. 591 refuted. 0 times theorem prover too weak. 7491 trivial. 0 not checked. [2020-07-21 13:22:35,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664735150] [2020-07-21 13:22:35,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:22:35,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:22:35,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23934962] [2020-07-21 13:22:35,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:22:35,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:22:35,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:22:35,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:22:35,147 INFO L87 Difference]: Start difference. First operand 174 states and 335 transitions. Second operand 15 states. [2020-07-21 13:22:35,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:22:35,448 INFO L93 Difference]: Finished difference Result 285 states and 661 transitions. [2020-07-21 13:22:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:22:35,449 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 544 [2020-07-21 13:22:35,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:22:35,454 INFO L225 Difference]: With dead ends: 285 [2020-07-21 13:22:35,454 INFO L226 Difference]: Without dead ends: 276 [2020-07-21 13:22:35,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 1063 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:22:35,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-07-21 13:22:35,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 185. [2020-07-21 13:22:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-07-21 13:22:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 379 transitions. [2020-07-21 13:22:35,477 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 379 transitions. Word has length 544 [2020-07-21 13:22:35,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:22:35,478 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 379 transitions. [2020-07-21 13:22:35,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:22:35,478 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 379 transitions. [2020-07-21 13:22:35,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-07-21 13:22:35,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:22:35,485 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 24, 24, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:22:35,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:35,698 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:22:35,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:22:35,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1578041339, now seen corresponding path program 23 times [2020-07-21 13:22:35,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:22:35,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374945568] [2020-07-21 13:22:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:36,304 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:22:36,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:22:36,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:22:36,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:22:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5620 backedges. 438 proven. 494 refuted. 0 times theorem prover too weak. 4688 trivial. 0 not checked. [2020-07-21 13:22:36,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:22:38,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:38,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:38,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:38,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:38,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:39,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:39,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:39,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:39,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:39,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:39,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5620 backedges. 438 proven. 510 refuted. 0 times theorem prover too weak. 4672 trivial. 0 not checked. [2020-07-21 13:22:39,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374945568] [2020-07-21 13:22:39,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:22:39,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:22:39,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046811191] [2020-07-21 13:22:39,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:22:39,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:22:39,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:22:39,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:22:39,756 INFO L87 Difference]: Start difference. First operand 185 states and 379 transitions. Second operand 17 states. [2020-07-21 13:22:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:22:40,123 INFO L93 Difference]: Finished difference Result 251 states and 557 transitions. [2020-07-21 13:22:40,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:22:40,124 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 445 [2020-07-21 13:22:40,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:22:40,128 INFO L225 Difference]: With dead ends: 251 [2020-07-21 13:22:40,128 INFO L226 Difference]: Without dead ends: 242 [2020-07-21 13:22:40,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 861 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:22:40,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-21 13:22:40,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 182. [2020-07-21 13:22:40,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-07-21 13:22:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 369 transitions. [2020-07-21 13:22:40,152 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 369 transitions. Word has length 445 [2020-07-21 13:22:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:22:40,153 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 369 transitions. [2020-07-21 13:22:40,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:22:40,153 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 369 transitions. [2020-07-21 13:22:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-07-21 13:22:40,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:22:40,159 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 25, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:22:40,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:40,374 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:22:40,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:22:40,375 INFO L82 PathProgramCache]: Analyzing trace with hash 453533303, now seen corresponding path program 24 times [2020-07-21 13:22:40,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:22:40,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613994709] [2020-07-21 13:22:40,376 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:41,003 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:22:41,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:22:41,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:22:41,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:22:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5656 backedges. 573 proven. 532 refuted. 0 times theorem prover too weak. 4551 trivial. 0 not checked. [2020-07-21 13:22:41,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:22:43,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:43,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:44,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:44,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:44,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:44,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:44,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:44,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:44,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:44,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5656 backedges. 573 proven. 558 refuted. 0 times theorem prover too weak. 4525 trivial. 0 not checked. [2020-07-21 13:22:45,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613994709] [2020-07-21 13:22:45,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:22:45,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:22:45,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187270810] [2020-07-21 13:22:45,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:22:45,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:22:45,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:22:45,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:22:45,314 INFO L87 Difference]: Start difference. First operand 182 states and 369 transitions. Second operand 19 states. [2020-07-21 13:22:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:22:45,790 INFO L93 Difference]: Finished difference Result 246 states and 548 transitions. [2020-07-21 13:22:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:22:45,792 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 447 [2020-07-21 13:22:45,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:22:45,796 INFO L225 Difference]: With dead ends: 246 [2020-07-21 13:22:45,796 INFO L226 Difference]: Without dead ends: 228 [2020-07-21 13:22:45,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 861 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:22:45,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-21 13:22:45,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 173. [2020-07-21 13:22:45,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-21 13:22:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 360 transitions. [2020-07-21 13:22:45,818 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 360 transitions. Word has length 447 [2020-07-21 13:22:45,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:22:45,818 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 360 transitions. [2020-07-21 13:22:45,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:22:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 360 transitions. [2020-07-21 13:22:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-07-21 13:22:45,825 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:22:45,825 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 29, 25, 23, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 11, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:22:46,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:46,040 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:22:46,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:22:46,041 INFO L82 PathProgramCache]: Analyzing trace with hash -653963705, now seen corresponding path program 25 times [2020-07-21 13:22:46,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:22:46,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731570176] [2020-07-21 13:22:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:46,680 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:22:46,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:22:46,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:22:46,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:22:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5005 backedges. 472 proven. 405 refuted. 0 times theorem prover too weak. 4128 trivial. 0 not checked. [2020-07-21 13:22:46,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:22:48,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:48,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:48,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:48,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:49,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:49,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:49,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:49,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:49,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:49,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:49,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5005 backedges. 476 proven. 415 refuted. 0 times theorem prover too weak. 4114 trivial. 0 not checked. [2020-07-21 13:22:50,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731570176] [2020-07-21 13:22:50,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:22:50,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:22:50,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74778240] [2020-07-21 13:22:50,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:22:50,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:22:50,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:22:50,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:22:50,063 INFO L87 Difference]: Start difference. First operand 173 states and 360 transitions. Second operand 17 states. [2020-07-21 13:22:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:22:50,399 INFO L93 Difference]: Finished difference Result 212 states and 447 transitions. [2020-07-21 13:22:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:22:50,401 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 421 [2020-07-21 13:22:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:22:50,405 INFO L225 Difference]: With dead ends: 212 [2020-07-21 13:22:50,405 INFO L226 Difference]: Without dead ends: 203 [2020-07-21 13:22:50,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 813 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:22:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-07-21 13:22:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 160. [2020-07-21 13:22:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-21 13:22:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 311 transitions. [2020-07-21 13:22:50,426 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 311 transitions. Word has length 421 [2020-07-21 13:22:50,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:22:50,427 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 311 transitions. [2020-07-21 13:22:50,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:22:50,427 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 311 transitions. [2020-07-21 13:22:50,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-21 13:22:50,433 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:22:50,433 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 26, 25, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 11, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:22:50,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:50,649 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:22:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:22:50,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1492157095, now seen corresponding path program 26 times [2020-07-21 13:22:50,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:22:50,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938954009] [2020-07-21 13:22:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:51,292 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:22:51,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:22:51,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:22:51,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:22:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5693 backedges. 392 proven. 382 refuted. 0 times theorem prover too weak. 4919 trivial. 0 not checked. [2020-07-21 13:22:51,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:22:53,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:53,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:53,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:53,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:53,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:53,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:53,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:53,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:53,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:53,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5693 backedges. 392 proven. 392 refuted. 0 times theorem prover too weak. 4909 trivial. 0 not checked. [2020-07-21 13:22:54,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938954009] [2020-07-21 13:22:54,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:22:54,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:22:54,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276638857] [2020-07-21 13:22:54,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:22:54,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:22:54,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:22:54,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:22:54,189 INFO L87 Difference]: Start difference. First operand 160 states and 311 transitions. Second operand 15 states. [2020-07-21 13:22:54,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:22:54,469 INFO L93 Difference]: Finished difference Result 199 states and 394 transitions. [2020-07-21 13:22:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:22:54,471 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 448 [2020-07-21 13:22:54,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:22:54,474 INFO L225 Difference]: With dead ends: 199 [2020-07-21 13:22:54,475 INFO L226 Difference]: Without dead ends: 190 [2020-07-21 13:22:54,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 871 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:22:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-21 13:22:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 157. [2020-07-21 13:22:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-21 13:22:54,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 301 transitions. [2020-07-21 13:22:54,493 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 301 transitions. Word has length 448 [2020-07-21 13:22:54,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:22:54,493 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 301 transitions. [2020-07-21 13:22:54,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:22:54,494 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 301 transitions. [2020-07-21 13:22:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-07-21 13:22:54,499 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:22:54,500 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 26, 24, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 11, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:22:54,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:54,710 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:22:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:22:54,711 INFO L82 PathProgramCache]: Analyzing trace with hash 604432549, now seen corresponding path program 27 times [2020-07-21 13:22:54,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:22:54,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129346134] [2020-07-21 13:22:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:55,368 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:22:55,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:22:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:22:55,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:22:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5669 backedges. 676 proven. 283 refuted. 0 times theorem prover too weak. 4710 trivial. 0 not checked. [2020-07-21 13:22:55,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:22:56,468 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 13:22:57,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:57,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:57,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:57,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:57,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:57,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:58,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:22:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5669 backedges. 680 proven. 295 refuted. 0 times theorem prover too weak. 4694 trivial. 0 not checked. [2020-07-21 13:22:58,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129346134] [2020-07-21 13:22:58,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:22:58,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:22:58,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261500663] [2020-07-21 13:22:58,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:22:58,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:22:58,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:22:58,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:22:58,996 INFO L87 Difference]: Start difference. First operand 157 states and 301 transitions. Second operand 17 states. [2020-07-21 13:22:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:22:59,355 INFO L93 Difference]: Finished difference Result 236 states and 540 transitions. [2020-07-21 13:22:59,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:22:59,356 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 447 [2020-07-21 13:22:59,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:22:59,361 INFO L225 Difference]: With dead ends: 236 [2020-07-21 13:22:59,361 INFO L226 Difference]: Without dead ends: 221 [2020-07-21 13:22:59,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 865 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:22:59,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-21 13:22:59,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 190. [2020-07-21 13:22:59,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-21 13:22:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 406 transitions. [2020-07-21 13:22:59,382 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 406 transitions. Word has length 447 [2020-07-21 13:22:59,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:22:59,383 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 406 transitions. [2020-07-21 13:22:59,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:22:59,383 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 406 transitions. [2020-07-21 13:22:59,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2020-07-21 13:22:59,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:22:59,389 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 42, 42, 34, 33, 26, 26, 26, 26, 26, 26, 26, 21, 21, 21, 21, 21, 21, 21, 20, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:22:59,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:22:59,590 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:22:59,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:22:59,591 INFO L82 PathProgramCache]: Analyzing trace with hash -384093826, now seen corresponding path program 28 times [2020-07-21 13:22:59,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:22:59,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251215822] [2020-07-21 13:22:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:00,311 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:00,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:00,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1433 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:23:00,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12185 backedges. 1161 proven. 718 refuted. 0 times theorem prover too weak. 10306 trivial. 0 not checked. [2020-07-21 13:23:00,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:03,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:03,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:04,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:04,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:04,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:04,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:05,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:05,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:05,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:05,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:05,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:05,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12185 backedges. 1161 proven. 751 refuted. 0 times theorem prover too weak. 10273 trivial. 0 not checked. [2020-07-21 13:23:06,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251215822] [2020-07-21 13:23:06,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:06,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 13:23:06,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139529769] [2020-07-21 13:23:06,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:23:06,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:06,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:23:06,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:23:06,922 INFO L87 Difference]: Start difference. First operand 190 states and 406 transitions. Second operand 21 states. [2020-07-21 13:23:07,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:07,512 INFO L93 Difference]: Finished difference Result 237 states and 503 transitions. [2020-07-21 13:23:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:23:07,512 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 644 [2020-07-21 13:23:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:07,516 INFO L225 Difference]: With dead ends: 237 [2020-07-21 13:23:07,516 INFO L226 Difference]: Without dead ends: 222 [2020-07-21 13:23:07,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1295 GetRequests, 1251 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:23:07,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-21 13:23:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 190. [2020-07-21 13:23:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-21 13:23:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 394 transitions. [2020-07-21 13:23:07,533 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 394 transitions. Word has length 644 [2020-07-21 13:23:07,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:07,533 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 394 transitions. [2020-07-21 13:23:07,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:23:07,533 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 394 transitions. [2020-07-21 13:23:07,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-07-21 13:23:07,537 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:07,538 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 28, 28, 23, 23, 17, 17, 17, 17, 17, 17, 17, 14, 14, 14, 14, 14, 14, 14, 12, 9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:07,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:07,739 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:07,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1801031900, now seen corresponding path program 29 times [2020-07-21 13:23:07,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:07,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857232710] [2020-07-21 13:23:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:08,401 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:08,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:23:08,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5306 backedges. 829 proven. 224 refuted. 0 times theorem prover too weak. 4253 trivial. 0 not checked. [2020-07-21 13:23:08,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:10,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:10,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:11,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:11,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:11,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:11,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:11,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5306 backedges. 833 proven. 241 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2020-07-21 13:23:12,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857232710] [2020-07-21 13:23:12,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:12,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:23:12,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587164354] [2020-07-21 13:23:12,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:23:12,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:12,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:23:12,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:23:12,574 INFO L87 Difference]: Start difference. First operand 190 states and 394 transitions. Second operand 19 states. [2020-07-21 13:23:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:13,004 INFO L93 Difference]: Finished difference Result 267 states and 589 transitions. [2020-07-21 13:23:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:23:13,005 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 431 [2020-07-21 13:23:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:13,010 INFO L225 Difference]: With dead ends: 267 [2020-07-21 13:23:13,010 INFO L226 Difference]: Without dead ends: 252 [2020-07-21 13:23:13,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 829 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:23:13,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-21 13:23:13,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 186. [2020-07-21 13:23:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-07-21 13:23:13,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 364 transitions. [2020-07-21 13:23:13,029 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 364 transitions. Word has length 431 [2020-07-21 13:23:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:13,029 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 364 transitions. [2020-07-21 13:23:13,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:23:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 364 transitions. [2020-07-21 13:23:13,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-21 13:23:13,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:13,033 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 28, 28, 27, 23, 17, 17, 17, 17, 17, 17, 17, 14, 14, 14, 14, 14, 14, 14, 13, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:13,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:13,234 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:13,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1115780654, now seen corresponding path program 30 times [2020-07-21 13:23:13,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:13,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678288928] [2020-07-21 13:23:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:13,992 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:13,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:13,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:23:13,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5404 backedges. 622 proven. 463 refuted. 0 times theorem prover too weak. 4319 trivial. 0 not checked. [2020-07-21 13:23:14,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:16,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:16,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:16,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:17,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:17,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:17,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:17,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:17,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:17,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:17,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:17,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5404 backedges. 624 proven. 485 refuted. 0 times theorem prover too weak. 4295 trivial. 0 not checked. [2020-07-21 13:23:18,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678288928] [2020-07-21 13:23:18,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:18,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:23:18,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910201662] [2020-07-21 13:23:18,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:23:18,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:18,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:23:18,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:23:18,326 INFO L87 Difference]: Start difference. First operand 186 states and 364 transitions. Second operand 19 states. [2020-07-21 13:23:18,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:18,835 INFO L93 Difference]: Finished difference Result 223 states and 439 transitions. [2020-07-21 13:23:18,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:23:18,837 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 435 [2020-07-21 13:23:18,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:18,840 INFO L225 Difference]: With dead ends: 223 [2020-07-21 13:23:18,840 INFO L226 Difference]: Without dead ends: 205 [2020-07-21 13:23:18,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 837 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:23:18,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-21 13:23:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 196. [2020-07-21 13:23:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-07-21 13:23:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 388 transitions. [2020-07-21 13:23:18,864 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 388 transitions. Word has length 435 [2020-07-21 13:23:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:18,865 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 388 transitions. [2020-07-21 13:23:18,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:23:18,865 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 388 transitions. [2020-07-21 13:23:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-21 13:23:18,872 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:18,873 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 26, 24, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:19,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:19,086 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:19,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:19,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1631227718, now seen corresponding path program 31 times [2020-07-21 13:23:19,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:19,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838436380] [2020-07-21 13:23:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:19,883 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:19,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:19,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:23:19,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5353 backedges. 669 proven. 235 refuted. 0 times theorem prover too weak. 4449 trivial. 0 not checked. [2020-07-21 13:23:20,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:21,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:21,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:21,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:21,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:22,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:22,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:22,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:22,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:22,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:22,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:22,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5353 backedges. 671 proven. 249 refuted. 0 times theorem prover too weak. 4433 trivial. 0 not checked. [2020-07-21 13:23:23,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838436380] [2020-07-21 13:23:23,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:23,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:23:23,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897689104] [2020-07-21 13:23:23,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:23:23,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:23,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:23:23,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:23:23,459 INFO L87 Difference]: Start difference. First operand 196 states and 388 transitions. Second operand 17 states. [2020-07-21 13:23:23,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:23,850 INFO L93 Difference]: Finished difference Result 305 states and 684 transitions. [2020-07-21 13:23:23,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:23:23,852 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 435 [2020-07-21 13:23:23,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:23,858 INFO L225 Difference]: With dead ends: 305 [2020-07-21 13:23:23,858 INFO L226 Difference]: Without dead ends: 290 [2020-07-21 13:23:23,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 841 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:23:23,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-07-21 13:23:23,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 188. [2020-07-21 13:23:23,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-21 13:23:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 362 transitions. [2020-07-21 13:23:23,888 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 362 transitions. Word has length 435 [2020-07-21 13:23:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:23,888 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 362 transitions. [2020-07-21 13:23:23,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:23:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 362 transitions. [2020-07-21 13:23:23,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-21 13:23:23,894 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:23,895 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 24, 24, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 9, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:24,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:24,102 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:24,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:24,103 INFO L82 PathProgramCache]: Analyzing trace with hash -443177628, now seen corresponding path program 32 times [2020-07-21 13:23:24,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:24,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288257129] [2020-07-21 13:23:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:24,809 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:24,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:24,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:23:24,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4708 backedges. 568 proven. 161 refuted. 0 times theorem prover too weak. 3979 trivial. 0 not checked. [2020-07-21 13:23:25,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:26,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:26,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:26,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:26,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:26,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:26,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4708 backedges. 570 proven. 169 refuted. 0 times theorem prover too weak. 3969 trivial. 0 not checked. [2020-07-21 13:23:27,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288257129] [2020-07-21 13:23:27,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:27,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:23:27,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593791972] [2020-07-21 13:23:27,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:23:27,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:27,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:23:27,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:23:27,645 INFO L87 Difference]: Start difference. First operand 188 states and 362 transitions. Second operand 15 states. [2020-07-21 13:23:27,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:27,941 INFO L93 Difference]: Finished difference Result 319 states and 769 transitions. [2020-07-21 13:23:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:23:27,942 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 409 [2020-07-21 13:23:27,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:27,948 INFO L225 Difference]: With dead ends: 319 [2020-07-21 13:23:27,948 INFO L226 Difference]: Without dead ends: 304 [2020-07-21 13:23:27,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 793 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:23:27,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-07-21 13:23:27,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 190. [2020-07-21 13:23:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-21 13:23:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 374 transitions. [2020-07-21 13:23:27,972 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 374 transitions. Word has length 409 [2020-07-21 13:23:27,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:27,972 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 374 transitions. [2020-07-21 13:23:27,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:23:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 374 transitions. [2020-07-21 13:23:27,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 13:23:27,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:27,980 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 29, 28, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 11, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:28,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:28,194 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:28,195 INFO L82 PathProgramCache]: Analyzing trace with hash -161749561, now seen corresponding path program 33 times [2020-07-21 13:23:28,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:28,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385339738] [2020-07-21 13:23:28,196 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:28,934 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:28,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:28,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:23:28,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7192 backedges. 726 proven. 338 refuted. 0 times theorem prover too weak. 6128 trivial. 0 not checked. [2020-07-21 13:23:29,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:30,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:30,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:31,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:31,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:31,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:31,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:31,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:31,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:31,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:31,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7192 backedges. 730 proven. 348 refuted. 0 times theorem prover too weak. 6114 trivial. 0 not checked. [2020-07-21 13:23:32,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385339738] [2020-07-21 13:23:32,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:32,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:23:32,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513025206] [2020-07-21 13:23:32,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:23:32,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:32,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:23:32,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:23:32,690 INFO L87 Difference]: Start difference. First operand 190 states and 374 transitions. Second operand 17 states. [2020-07-21 13:23:33,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:33,036 INFO L93 Difference]: Finished difference Result 266 states and 549 transitions. [2020-07-21 13:23:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:23:33,037 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 502 [2020-07-21 13:23:33,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:33,042 INFO L225 Difference]: With dead ends: 266 [2020-07-21 13:23:33,042 INFO L226 Difference]: Without dead ends: 251 [2020-07-21 13:23:33,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 975 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:23:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-07-21 13:23:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 183. [2020-07-21 13:23:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-21 13:23:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 343 transitions. [2020-07-21 13:23:33,057 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 343 transitions. Word has length 502 [2020-07-21 13:23:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:33,057 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 343 transitions. [2020-07-21 13:23:33,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:23:33,057 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 343 transitions. [2020-07-21 13:23:33,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-21 13:23:33,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:33,061 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 26, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 10, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:33,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:33,262 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:33,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:33,264 INFO L82 PathProgramCache]: Analyzing trace with hash -969075608, now seen corresponding path program 34 times [2020-07-21 13:23:33,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:33,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455715721] [2020-07-21 13:23:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:33,976 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:33,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:33,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:23:33,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 869 proven. 211 refuted. 0 times theorem prover too weak. 4297 trivial. 0 not checked. [2020-07-21 13:23:34,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:35,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:35,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:36,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:36,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:37,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:37,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:37,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:37,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:37,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 871 proven. 233 refuted. 0 times theorem prover too weak. 4273 trivial. 0 not checked. [2020-07-21 13:23:38,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455715721] [2020-07-21 13:23:38,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:38,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:23:38,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598231269] [2020-07-21 13:23:38,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:23:38,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:38,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:23:38,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:23:38,620 INFO L87 Difference]: Start difference. First operand 183 states and 343 transitions. Second operand 19 states. [2020-07-21 13:23:39,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:39,087 INFO L93 Difference]: Finished difference Result 232 states and 434 transitions. [2020-07-21 13:23:39,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:23:39,089 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 436 [2020-07-21 13:23:39,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:39,094 INFO L225 Difference]: With dead ends: 232 [2020-07-21 13:23:39,094 INFO L226 Difference]: Without dead ends: 217 [2020-07-21 13:23:39,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 839 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:23:39,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-07-21 13:23:39,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 175. [2020-07-21 13:23:39,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-07-21 13:23:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 326 transitions. [2020-07-21 13:23:39,115 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 326 transitions. Word has length 436 [2020-07-21 13:23:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:39,116 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 326 transitions. [2020-07-21 13:23:39,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:23:39,116 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 326 transitions. [2020-07-21 13:23:39,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-21 13:23:39,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:39,123 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 24, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 12, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:39,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:39,337 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:39,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:39,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1395765131, now seen corresponding path program 35 times [2020-07-21 13:23:39,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:39,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031456752] [2020-07-21 13:23:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:40,103 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:40,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:40,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:23:40,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5695 backedges. 735 proven. 203 refuted. 0 times theorem prover too weak. 4757 trivial. 0 not checked. [2020-07-21 13:23:40,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:41,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:42,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:42,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:42,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:42,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:42,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:42,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:42,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:43,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5695 backedges. 739 proven. 215 refuted. 0 times theorem prover too weak. 4741 trivial. 0 not checked. [2020-07-21 13:23:44,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031456752] [2020-07-21 13:23:44,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:44,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:23:44,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216913361] [2020-07-21 13:23:44,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:23:44,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:44,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:23:44,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:23:44,021 INFO L87 Difference]: Start difference. First operand 175 states and 326 transitions. Second operand 17 states. [2020-07-21 13:23:44,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:44,417 INFO L93 Difference]: Finished difference Result 209 states and 390 transitions. [2020-07-21 13:23:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:23:44,419 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 448 [2020-07-21 13:23:44,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:44,422 INFO L225 Difference]: With dead ends: 209 [2020-07-21 13:23:44,422 INFO L226 Difference]: Without dead ends: 194 [2020-07-21 13:23:44,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 867 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:23:44,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-07-21 13:23:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 173. [2020-07-21 13:23:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-21 13:23:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 313 transitions. [2020-07-21 13:23:44,440 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 313 transitions. Word has length 448 [2020-07-21 13:23:44,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:44,441 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 313 transitions. [2020-07-21 13:23:44,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:23:44,441 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 313 transitions. [2020-07-21 13:23:44,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 13:23:44,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:44,447 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:44,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:44,659 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:44,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:44,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2071402723, now seen corresponding path program 36 times [2020-07-21 13:23:44,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:44,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490990210] [2020-07-21 13:23:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:45,539 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:45,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:45,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:23:45,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 825 proven. 182 refuted. 0 times theorem prover too weak. 5446 trivial. 0 not checked. [2020-07-21 13:23:45,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:47,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:47,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:47,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:47,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:48,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:48,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:48,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:48,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:48,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 831 proven. 190 refuted. 0 times theorem prover too weak. 5432 trivial. 0 not checked. [2020-07-21 13:23:49,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490990210] [2020-07-21 13:23:49,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:49,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:23:49,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036443550] [2020-07-21 13:23:49,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:23:49,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:49,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:23:49,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:23:49,681 INFO L87 Difference]: Start difference. First operand 173 states and 313 transitions. Second operand 17 states. [2020-07-21 13:23:50,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:50,075 INFO L93 Difference]: Finished difference Result 201 states and 360 transitions. [2020-07-21 13:23:50,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:23:50,077 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 476 [2020-07-21 13:23:50,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:50,080 INFO L225 Difference]: With dead ends: 201 [2020-07-21 13:23:50,081 INFO L226 Difference]: Without dead ends: 188 [2020-07-21 13:23:50,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 923 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:23:50,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-21 13:23:50,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 167. [2020-07-21 13:23:50,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-07-21 13:23:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 290 transitions. [2020-07-21 13:23:50,099 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 290 transitions. Word has length 476 [2020-07-21 13:23:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:50,100 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 290 transitions. [2020-07-21 13:23:50,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:23:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 290 transitions. [2020-07-21 13:23:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-21 13:23:50,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:50,105 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 24, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 12, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:50,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:50,320 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:50,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:50,321 INFO L82 PathProgramCache]: Analyzing trace with hash -162910953, now seen corresponding path program 37 times [2020-07-21 13:23:50,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:50,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525044705] [2020-07-21 13:23:50,322 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:51,113 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:51,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:51,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:23:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5695 backedges. 599 proven. 175 refuted. 0 times theorem prover too weak. 4921 trivial. 0 not checked. [2020-07-21 13:23:51,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:52,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:52,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:52,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:52,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:53,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:53,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:53,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:53,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:53,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:53,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:53,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5695 backedges. 599 proven. 185 refuted. 0 times theorem prover too weak. 4911 trivial. 0 not checked. [2020-07-21 13:23:54,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525044705] [2020-07-21 13:23:54,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:54,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:23:54,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142899907] [2020-07-21 13:23:54,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:23:54,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:54,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:23:54,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:23:54,606 INFO L87 Difference]: Start difference. First operand 167 states and 290 transitions. Second operand 15 states. [2020-07-21 13:23:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:54,910 INFO L93 Difference]: Finished difference Result 193 states and 327 transitions. [2020-07-21 13:23:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:23:54,912 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 448 [2020-07-21 13:23:54,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:54,915 INFO L225 Difference]: With dead ends: 193 [2020-07-21 13:23:54,915 INFO L226 Difference]: Without dead ends: 178 [2020-07-21 13:23:54,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 871 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:23:54,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-21 13:23:54,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2020-07-21 13:23:54,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-07-21 13:23:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 285 transitions. [2020-07-21 13:23:54,929 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 285 transitions. Word has length 448 [2020-07-21 13:23:54,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:54,929 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 285 transitions. [2020-07-21 13:23:54,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:23:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 285 transitions. [2020-07-21 13:23:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 13:23:54,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:54,934 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 29, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 13, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:55,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:55,135 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:55,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:55,136 INFO L82 PathProgramCache]: Analyzing trace with hash -2127489911, now seen corresponding path program 38 times [2020-07-21 13:23:55,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:55,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733775759] [2020-07-21 13:23:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:55,939 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:55,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:55,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:23:55,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6481 backedges. 941 proven. 244 refuted. 0 times theorem prover too weak. 5296 trivial. 0 not checked. [2020-07-21 13:23:56,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:58,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:58,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:59,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:59,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:59,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:59,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:59,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:59,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:59,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:59,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:59,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:00,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6481 backedges. 941 proven. 270 refuted. 0 times theorem prover too weak. 5270 trivial. 0 not checked. [2020-07-21 13:24:01,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733775759] [2020-07-21 13:24:01,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:01,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:24:01,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299341675] [2020-07-21 13:24:01,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:24:01,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:01,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:24:01,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:24:01,279 INFO L87 Difference]: Start difference. First operand 164 states and 285 transitions. Second operand 19 states. [2020-07-21 13:24:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:01,840 INFO L93 Difference]: Finished difference Result 176 states and 300 transitions. [2020-07-21 13:24:01,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:24:01,841 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 477 [2020-07-21 13:24:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:01,844 INFO L225 Difference]: With dead ends: 176 [2020-07-21 13:24:01,844 INFO L226 Difference]: Without dead ends: 161 [2020-07-21 13:24:01,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 921 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:24:01,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-07-21 13:24:01,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2020-07-21 13:24:01,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-21 13:24:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 280 transitions. [2020-07-21 13:24:01,861 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 280 transitions. Word has length 477 [2020-07-21 13:24:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:01,862 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 280 transitions. [2020-07-21 13:24:01,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:24:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 280 transitions. [2020-07-21 13:24:01,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 13:24:01,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:01,866 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 26, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:02,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:02,067 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:02,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:02,068 INFO L82 PathProgramCache]: Analyzing trace with hash 959962007, now seen corresponding path program 39 times [2020-07-21 13:24:02,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:02,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075633364] [2020-07-21 13:24:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:02,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:02,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:02,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:24:02,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6427 backedges. 671 proven. 155 refuted. 0 times theorem prover too weak. 5601 trivial. 0 not checked. [2020-07-21 13:24:03,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:04,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:04,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:04,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:04,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:04,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:04,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:04,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:04,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:05,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:05,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6427 backedges. 673 proven. 163 refuted. 0 times theorem prover too weak. 5591 trivial. 0 not checked. [2020-07-21 13:24:06,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075633364] [2020-07-21 13:24:06,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:06,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:24:06,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322818965] [2020-07-21 13:24:06,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:24:06,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:06,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:24:06,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:24:06,737 INFO L87 Difference]: Start difference. First operand 161 states and 280 transitions. Second operand 15 states. [2020-07-21 13:24:07,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:07,109 INFO L93 Difference]: Finished difference Result 197 states and 343 transitions. [2020-07-21 13:24:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:24:07,111 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 475 [2020-07-21 13:24:07,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:07,115 INFO L225 Difference]: With dead ends: 197 [2020-07-21 13:24:07,115 INFO L226 Difference]: Without dead ends: 184 [2020-07-21 13:24:07,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 925 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:24:07,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-07-21 13:24:07,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 153. [2020-07-21 13:24:07,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-21 13:24:07,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 262 transitions. [2020-07-21 13:24:07,129 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 262 transitions. Word has length 475 [2020-07-21 13:24:07,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:07,129 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 262 transitions. [2020-07-21 13:24:07,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:24:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 262 transitions. [2020-07-21 13:24:07,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 13:24:07,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:07,134 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:07,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:07,345 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:07,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:07,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 40 times [2020-07-21 13:24:07,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:07,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380200564] [2020-07-21 13:24:07,347 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:08,193 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:08,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:08,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 271 conjunts are in the unsatisfiable core [2020-07-21 13:24:08,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2020-07-21 13:24:10,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:18,246 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 13:24:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2020-07-21 13:24:20,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380200564] [2020-07-21 13:24:20,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:20,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 52 [2020-07-21 13:24:20,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591198131] [2020-07-21 13:24:20,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-21 13:24:20,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:20,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-21 13:24:20,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-07-21 13:24:20,296 INFO L87 Difference]: Start difference. First operand 153 states and 262 transitions. Second operand 52 states. [2020-07-21 13:24:22,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:22,851 INFO L93 Difference]: Finished difference Result 404 states and 908 transitions. [2020-07-21 13:24:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-07-21 13:24:22,852 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 463 [2020-07-21 13:24:22,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:22,866 INFO L225 Difference]: With dead ends: 404 [2020-07-21 13:24:22,866 INFO L226 Difference]: Without dead ends: 397 [2020-07-21 13:24:22,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 934 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=161, Invalid=3499, Unknown=0, NotChecked=0, Total=3660 [2020-07-21 13:24:22,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-07-21 13:24:22,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 249. [2020-07-21 13:24:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-07-21 13:24:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 549 transitions. [2020-07-21 13:24:22,929 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 549 transitions. Word has length 463 [2020-07-21 13:24:22,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:22,929 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 549 transitions. [2020-07-21 13:24:22,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-21 13:24:22,929 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 549 transitions. [2020-07-21 13:24:22,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2020-07-21 13:24:22,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:22,938 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 35, 35, 30, 27, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:23,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:23,152 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:23,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:23,153 INFO L82 PathProgramCache]: Analyzing trace with hash -600457098, now seen corresponding path program 41 times [2020-07-21 13:24:23,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:23,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924162583] [2020-07-21 13:24:23,153 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:23,990 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:23,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:23,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:24:24,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7590 backedges. 395 proven. 725 refuted. 0 times theorem prover too weak. 6470 trivial. 0 not checked. [2020-07-21 13:24:24,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:26,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:26,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:27,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:28,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:28,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:28,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:28,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:28,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:28,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:28,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:28,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:28,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7590 backedges. 401 proven. 737 refuted. 0 times theorem prover too weak. 6452 trivial. 0 not checked. [2020-07-21 13:24:28,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924162583] [2020-07-21 13:24:28,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:28,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:24:28,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193665762] [2020-07-21 13:24:28,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:24:28,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:28,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:24:28,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:24:28,889 INFO L87 Difference]: Start difference. First operand 249 states and 549 transitions. Second operand 17 states. [2020-07-21 13:24:29,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:29,337 INFO L93 Difference]: Finished difference Result 315 states and 712 transitions. [2020-07-21 13:24:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:24:29,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 514 [2020-07-21 13:24:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:29,347 INFO L225 Difference]: With dead ends: 315 [2020-07-21 13:24:29,347 INFO L226 Difference]: Without dead ends: 287 [2020-07-21 13:24:29,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 999 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:24:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-07-21 13:24:29,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 255. [2020-07-21 13:24:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-07-21 13:24:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 570 transitions. [2020-07-21 13:24:29,388 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 570 transitions. Word has length 514 [2020-07-21 13:24:29,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:29,389 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 570 transitions. [2020-07-21 13:24:29,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:24:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 570 transitions. [2020-07-21 13:24:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2020-07-21 13:24:29,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:29,397 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 33, 33, 30, 27, 21, 21, 21, 21, 21, 21, 21, 16, 16, 16, 16, 16, 16, 16, 14, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:29,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:29,598 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:29,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1548400438, now seen corresponding path program 42 times [2020-07-21 13:24:29,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:29,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359747665] [2020-07-21 13:24:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:30,440 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:30,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:30,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:24:30,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7662 backedges. 513 proven. 611 refuted. 0 times theorem prover too weak. 6538 trivial. 0 not checked. [2020-07-21 13:24:30,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:33,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:33,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:33,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:33,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:33,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:33,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:33,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:34,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:34,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:34,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:34,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:34,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7662 backedges. 517 proven. 625 refuted. 0 times theorem prover too weak. 6520 trivial. 0 not checked. [2020-07-21 13:24:34,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359747665] [2020-07-21 13:24:34,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:34,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:24:34,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551439874] [2020-07-21 13:24:35,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:24:35,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:35,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:24:35,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:24:35,000 INFO L87 Difference]: Start difference. First operand 255 states and 570 transitions. Second operand 17 states. [2020-07-21 13:24:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:35,415 INFO L93 Difference]: Finished difference Result 320 states and 732 transitions. [2020-07-21 13:24:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:24:35,416 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 514 [2020-07-21 13:24:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:35,422 INFO L225 Difference]: With dead ends: 320 [2020-07-21 13:24:35,422 INFO L226 Difference]: Without dead ends: 302 [2020-07-21 13:24:35,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 999 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:24:35,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-07-21 13:24:35,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 260. [2020-07-21 13:24:35,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-07-21 13:24:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 582 transitions. [2020-07-21 13:24:35,460 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 582 transitions. Word has length 514 [2020-07-21 13:24:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:35,461 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 582 transitions. [2020-07-21 13:24:35,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:24:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 582 transitions. [2020-07-21 13:24:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2020-07-21 13:24:35,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:35,469 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 37, 37, 29, 28, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 11, 11, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:35,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:35,684 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:35,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:35,685 INFO L82 PathProgramCache]: Analyzing trace with hash -92787621, now seen corresponding path program 43 times [2020-07-21 13:24:35,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:35,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846547874] [2020-07-21 13:24:35,686 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:36,551 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:36,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:36,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:24:36,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7940 backedges. 1131 proven. 192 refuted. 0 times theorem prover too weak. 6617 trivial. 0 not checked. [2020-07-21 13:24:36,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:39,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:39,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:39,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:39,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:39,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:40,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:40,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:40,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:40,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:40,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:40,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:41,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7940 backedges. 1131 proven. 216 refuted. 0 times theorem prover too weak. 6593 trivial. 0 not checked. [2020-07-21 13:24:42,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846547874] [2020-07-21 13:24:42,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:42,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:24:42,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944171022] [2020-07-21 13:24:42,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:24:42,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:42,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:24:42,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:24:42,219 INFO L87 Difference]: Start difference. First operand 260 states and 582 transitions. Second operand 19 states. [2020-07-21 13:24:42,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:42,799 INFO L93 Difference]: Finished difference Result 316 states and 685 transitions. [2020-07-21 13:24:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:24:42,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 526 [2020-07-21 13:24:42,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:42,805 INFO L225 Difference]: With dead ends: 316 [2020-07-21 13:24:42,805 INFO L226 Difference]: Without dead ends: 297 [2020-07-21 13:24:42,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 1019 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:24:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-07-21 13:24:42,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 242. [2020-07-21 13:24:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-07-21 13:24:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 521 transitions. [2020-07-21 13:24:42,928 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 521 transitions. Word has length 526 [2020-07-21 13:24:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:42,928 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 521 transitions. [2020-07-21 13:24:42,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:24:42,928 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 521 transitions. [2020-07-21 13:24:42,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2020-07-21 13:24:42,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:42,936 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 35, 35, 29, 28, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 12, 11, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:43,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:43,146 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:43,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:43,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1543481634, now seen corresponding path program 44 times [2020-07-21 13:24:43,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:43,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695029851] [2020-07-21 13:24:43,148 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:44,028 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:44,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:44,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:24:44,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7588 backedges. 432 proven. 855 refuted. 0 times theorem prover too weak. 6301 trivial. 0 not checked. [2020-07-21 13:24:44,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:47,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:48,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:48,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:48,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:48,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:48,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:48,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:49,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:49,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:49,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:49,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7588 backedges. 438 proven. 873 refuted. 0 times theorem prover too weak. 6277 trivial. 0 not checked. [2020-07-21 13:24:49,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695029851] [2020-07-21 13:24:49,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:49,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:24:49,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957802890] [2020-07-21 13:24:49,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:24:49,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:49,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:24:49,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:24:49,637 INFO L87 Difference]: Start difference. First operand 242 states and 521 transitions. Second operand 19 states. [2020-07-21 13:24:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:50,098 INFO L93 Difference]: Finished difference Result 286 states and 601 transitions. [2020-07-21 13:24:50,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:24:50,100 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 514 [2020-07-21 13:24:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:50,104 INFO L225 Difference]: With dead ends: 286 [2020-07-21 13:24:50,104 INFO L226 Difference]: Without dead ends: 269 [2020-07-21 13:24:50,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 995 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:24:50,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-07-21 13:24:50,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 247. [2020-07-21 13:24:50,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-07-21 13:24:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 538 transitions. [2020-07-21 13:24:50,129 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 538 transitions. Word has length 514 [2020-07-21 13:24:50,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:50,129 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 538 transitions. [2020-07-21 13:24:50,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:24:50,129 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 538 transitions. [2020-07-21 13:24:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 13:24:50,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:50,134 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 29, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 12, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:50,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:50,335 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:50,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:50,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1136701849, now seen corresponding path program 45 times [2020-07-21 13:24:50,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:50,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525275406] [2020-07-21 13:24:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:51,302 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:51,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:51,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:24:51,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7177 backedges. 798 proven. 289 refuted. 0 times theorem prover too weak. 6090 trivial. 0 not checked. [2020-07-21 13:24:51,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:53,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:53,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:54,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:54,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:54,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:54,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:54,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:54,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7177 backedges. 802 proven. 303 refuted. 0 times theorem prover too weak. 6072 trivial. 0 not checked. [2020-07-21 13:24:55,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525275406] [2020-07-21 13:24:55,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:55,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:24:55,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15290966] [2020-07-21 13:24:55,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:24:55,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:55,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:24:55,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:24:55,873 INFO L87 Difference]: Start difference. First operand 247 states and 538 transitions. Second operand 17 states. [2020-07-21 13:24:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:56,279 INFO L93 Difference]: Finished difference Result 294 states and 641 transitions. [2020-07-21 13:24:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:24:56,279 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 501 [2020-07-21 13:24:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:56,284 INFO L225 Difference]: With dead ends: 294 [2020-07-21 13:24:56,284 INFO L226 Difference]: Without dead ends: 279 [2020-07-21 13:24:56,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1007 GetRequests, 973 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:24:56,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-07-21 13:24:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 239. [2020-07-21 13:24:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-07-21 13:24:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 523 transitions. [2020-07-21 13:24:56,316 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 523 transitions. Word has length 501 [2020-07-21 13:24:56,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:56,317 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 523 transitions. [2020-07-21 13:24:56,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:24:56,317 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 523 transitions. [2020-07-21 13:24:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 13:24:56,323 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:56,324 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 29, 28, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 11, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:56,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:56,538 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:56,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:56,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1591019991, now seen corresponding path program 46 times [2020-07-21 13:24:56,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:56,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829411573] [2020-07-21 13:24:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:57,438 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:57,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:57,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:24:57,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7192 backedges. 558 proven. 528 refuted. 0 times theorem prover too weak. 6106 trivial. 0 not checked. [2020-07-21 13:24:57,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:00,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:01,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:01,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:01,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:01,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:01,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:01,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7192 backedges. 562 proven. 542 refuted. 0 times theorem prover too weak. 6088 trivial. 0 not checked. [2020-07-21 13:25:02,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829411573] [2020-07-21 13:25:02,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:02,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:25:02,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706214407] [2020-07-21 13:25:02,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:25:02,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:02,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:25:02,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:25:02,172 INFO L87 Difference]: Start difference. First operand 239 states and 523 transitions. Second operand 17 states. [2020-07-21 13:25:02,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:02,660 INFO L93 Difference]: Finished difference Result 288 states and 646 transitions. [2020-07-21 13:25:02,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:25:02,662 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 502 [2020-07-21 13:25:02,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:02,669 INFO L225 Difference]: With dead ends: 288 [2020-07-21 13:25:02,669 INFO L226 Difference]: Without dead ends: 270 [2020-07-21 13:25:02,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 975 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:25:02,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-07-21 13:25:02,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 242. [2020-07-21 13:25:02,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-07-21 13:25:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 514 transitions. [2020-07-21 13:25:02,707 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 514 transitions. Word has length 502 [2020-07-21 13:25:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:02,708 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 514 transitions. [2020-07-21 13:25:02,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:25:02,708 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 514 transitions. [2020-07-21 13:25:02,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 13:25:02,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:02,716 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 31, 31, 27, 26, 20, 20, 20, 20, 20, 20, 20, 15, 15, 15, 15, 15, 15, 15, 13, 12, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:02,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:02,930 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:02,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:02,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1163984274, now seen corresponding path program 47 times [2020-07-21 13:25:02,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:02,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405852368] [2020-07-21 13:25:02,931 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:03,883 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:03,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:03,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:25:03,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6836 backedges. 585 proven. 120 refuted. 0 times theorem prover too weak. 6131 trivial. 0 not checked. [2020-07-21 13:25:04,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:05,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:05,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:05,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:05,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:05,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:05,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:05,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:05,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:06,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6836 backedges. 585 proven. 127 refuted. 0 times theorem prover too weak. 6124 trivial. 0 not checked. [2020-07-21 13:25:07,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405852368] [2020-07-21 13:25:07,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:07,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 13:25:07,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802841508] [2020-07-21 13:25:07,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:25:07,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:07,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:25:07,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:25:07,466 INFO L87 Difference]: Start difference. First operand 242 states and 514 transitions. Second operand 13 states. [2020-07-21 13:25:07,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:07,774 INFO L93 Difference]: Finished difference Result 301 states and 725 transitions. [2020-07-21 13:25:07,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:25:07,775 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 486 [2020-07-21 13:25:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:07,783 INFO L225 Difference]: With dead ends: 301 [2020-07-21 13:25:07,784 INFO L226 Difference]: Without dead ends: 288 [2020-07-21 13:25:07,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 975 GetRequests, 951 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:25:07,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-07-21 13:25:07,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 239. [2020-07-21 13:25:07,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-07-21 13:25:07,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 509 transitions. [2020-07-21 13:25:07,816 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 509 transitions. Word has length 486 [2020-07-21 13:25:07,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:07,816 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 509 transitions. [2020-07-21 13:25:07,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:25:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 509 transitions. [2020-07-21 13:25:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2020-07-21 13:25:07,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:07,824 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 28, 27, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 10, 10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:08,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:08,039 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:08,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1806630072, now seen corresponding path program 48 times [2020-07-21 13:25:08,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:08,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203317227] [2020-07-21 13:25:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:08,998 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:08,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:09,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:25:09,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7501 backedges. 981 proven. 129 refuted. 0 times theorem prover too weak. 6391 trivial. 0 not checked. [2020-07-21 13:25:09,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:10,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:10,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:11,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:11,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:11,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:11,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:11,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:11,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:11,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:12,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:12,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7501 backedges. 981 proven. 147 refuted. 0 times theorem prover too weak. 6373 trivial. 0 not checked. [2020-07-21 13:25:13,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203317227] [2020-07-21 13:25:13,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:13,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:25:13,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929917391] [2020-07-21 13:25:13,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:25:13,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:13,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:25:13,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:25:13,896 INFO L87 Difference]: Start difference. First operand 239 states and 509 transitions. Second operand 17 states. [2020-07-21 13:25:14,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:14,323 INFO L93 Difference]: Finished difference Result 258 states and 531 transitions. [2020-07-21 13:25:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:25:14,324 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 512 [2020-07-21 13:25:14,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:14,328 INFO L225 Difference]: With dead ends: 258 [2020-07-21 13:25:14,328 INFO L226 Difference]: Without dead ends: 239 [2020-07-21 13:25:14,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 995 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:25:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-21 13:25:14,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 233. [2020-07-21 13:25:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-21 13:25:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 496 transitions. [2020-07-21 13:25:14,361 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 496 transitions. Word has length 512 [2020-07-21 13:25:14,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:14,362 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 496 transitions. [2020-07-21 13:25:14,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:25:14,362 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 496 transitions. [2020-07-21 13:25:14,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 13:25:14,369 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:14,369 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 27, 27, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 11, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:14,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:14,584 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:14,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:14,584 INFO L82 PathProgramCache]: Analyzing trace with hash -363496286, now seen corresponding path program 49 times [2020-07-21 13:25:14,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:14,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378541589] [2020-07-21 13:25:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:15,603 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:15,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:15,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 13:25:15,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 336 proven. 1010 refuted. 0 times theorem prover too weak. 6128 trivial. 0 not checked. [2020-07-21 13:25:15,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:19,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:20,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:21,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:21,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:21,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:21,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:21,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:21,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:21,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:22,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 335 proven. 1032 refuted. 0 times theorem prover too weak. 6107 trivial. 0 not checked. [2020-07-21 13:25:22,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378541589] [2020-07-21 13:25:22,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:22,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 13:25:22,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992745754] [2020-07-21 13:25:22,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:25:22,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:22,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:25:22,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:25:22,369 INFO L87 Difference]: Start difference. First operand 233 states and 496 transitions. Second operand 21 states. [2020-07-21 13:25:23,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:23,026 INFO L93 Difference]: Finished difference Result 308 states and 678 transitions. [2020-07-21 13:25:23,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:25:23,028 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 511 [2020-07-21 13:25:23,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:23,033 INFO L225 Difference]: With dead ends: 308 [2020-07-21 13:25:23,033 INFO L226 Difference]: Without dead ends: 242 [2020-07-21 13:25:23,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 987 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 13:25:23,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-21 13:25:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 239. [2020-07-21 13:25:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-07-21 13:25:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 502 transitions. [2020-07-21 13:25:23,067 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 502 transitions. Word has length 511 [2020-07-21 13:25:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:23,067 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 502 transitions. [2020-07-21 13:25:23,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:25:23,068 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 502 transitions. [2020-07-21 13:25:23,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 13:25:23,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:23,075 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 34, 34, 27, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 12, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:23,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:23,289 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:23,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:23,289 INFO L82 PathProgramCache]: Analyzing trace with hash -949503063, now seen corresponding path program 50 times [2020-07-21 13:25:23,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:23,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217955811] [2020-07-21 13:25:23,290 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:24,223 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:24,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:24,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 13:25:24,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7138 backedges. 305 proven. 836 refuted. 0 times theorem prover too weak. 5997 trivial. 0 not checked. [2020-07-21 13:25:24,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:27,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:27,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:28,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:29,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:29,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:29,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:29,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:29,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:29,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:29,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7138 backedges. 309 proven. 846 refuted. 0 times theorem prover too weak. 5983 trivial. 0 not checked. [2020-07-21 13:25:30,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217955811] [2020-07-21 13:25:30,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:30,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 13:25:30,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480553204] [2020-07-21 13:25:30,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:25:30,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:30,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:25:30,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:25:30,121 INFO L87 Difference]: Start difference. First operand 239 states and 502 transitions. Second operand 19 states. [2020-07-21 13:25:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:30,610 INFO L93 Difference]: Finished difference Result 338 states and 718 transitions. [2020-07-21 13:25:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:25:30,613 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 499 [2020-07-21 13:25:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:30,618 INFO L225 Difference]: With dead ends: 338 [2020-07-21 13:25:30,618 INFO L226 Difference]: Without dead ends: 257 [2020-07-21 13:25:30,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1003 GetRequests, 967 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:25:30,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-07-21 13:25:30,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 239. [2020-07-21 13:25:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-07-21 13:25:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 474 transitions. [2020-07-21 13:25:30,641 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 474 transitions. Word has length 499 [2020-07-21 13:25:30,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:30,641 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 474 transitions. [2020-07-21 13:25:30,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:25:30,641 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 474 transitions. [2020-07-21 13:25:30,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2020-07-21 13:25:30,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:30,646 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 35, 35, 29, 27, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 12, 11, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:30,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:30,860 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:30,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:30,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1798232420, now seen corresponding path program 51 times [2020-07-21 13:25:30,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:30,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093164692] [2020-07-21 13:25:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:31,805 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:31,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:31,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:25:31,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7561 backedges. 870 proven. 243 refuted. 0 times theorem prover too weak. 6448 trivial. 0 not checked. [2020-07-21 13:25:32,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:34,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:34,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:34,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:35,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:35,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:35,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:35,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:35,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:35,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:35,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:35,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7561 backedges. 870 proven. 265 refuted. 0 times theorem prover too weak. 6426 trivial. 0 not checked. [2020-07-21 13:25:37,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093164692] [2020-07-21 13:25:37,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:37,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:25:37,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069504572] [2020-07-21 13:25:37,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:25:37,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:37,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:25:37,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:25:37,451 INFO L87 Difference]: Start difference. First operand 239 states and 474 transitions. Second operand 17 states. [2020-07-21 13:25:37,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:37,930 INFO L93 Difference]: Finished difference Result 268 states and 533 transitions. [2020-07-21 13:25:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:25:37,930 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 513 [2020-07-21 13:25:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:37,935 INFO L225 Difference]: With dead ends: 268 [2020-07-21 13:25:37,935 INFO L226 Difference]: Without dead ends: 253 [2020-07-21 13:25:37,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1031 GetRequests, 997 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:25:37,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-07-21 13:25:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 236. [2020-07-21 13:25:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-21 13:25:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 469 transitions. [2020-07-21 13:25:37,958 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 469 transitions. Word has length 513 [2020-07-21 13:25:37,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:37,958 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 469 transitions. [2020-07-21 13:25:37,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:25:37,959 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 469 transitions. [2020-07-21 13:25:37,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 13:25:37,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:37,964 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 28, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:38,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:38,165 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:38,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:38,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1027076142, now seen corresponding path program 52 times [2020-07-21 13:25:38,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:38,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93713658] [2020-07-21 13:25:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:39,112 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:39,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:39,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:25:39,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6793 backedges. 910 proven. 140 refuted. 0 times theorem prover too weak. 5743 trivial. 0 not checked. [2020-07-21 13:25:39,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:41,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:41,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:41,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:41,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:41,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:41,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:42,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:42,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:42,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:42,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6793 backedges. 912 proven. 156 refuted. 0 times theorem prover too weak. 5725 trivial. 0 not checked. [2020-07-21 13:25:44,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93713658] [2020-07-21 13:25:44,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:44,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:25:44,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726554214] [2020-07-21 13:25:44,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:25:44,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:44,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:25:44,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:25:44,079 INFO L87 Difference]: Start difference. First operand 236 states and 469 transitions. Second operand 17 states. [2020-07-21 13:25:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:44,518 INFO L93 Difference]: Finished difference Result 278 states and 542 transitions. [2020-07-21 13:25:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:25:44,518 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 488 [2020-07-21 13:25:44,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:44,523 INFO L225 Difference]: With dead ends: 278 [2020-07-21 13:25:44,523 INFO L226 Difference]: Without dead ends: 265 [2020-07-21 13:25:44,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 947 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:25:44,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-07-21 13:25:44,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 228. [2020-07-21 13:25:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-07-21 13:25:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 452 transitions. [2020-07-21 13:25:44,544 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 452 transitions. Word has length 488 [2020-07-21 13:25:44,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:44,545 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 452 transitions. [2020-07-21 13:25:44,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:25:44,545 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 452 transitions. [2020-07-21 13:25:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 13:25:44,549 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:44,549 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 34, 34, 27, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 12, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:44,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:44,750 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:44,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:44,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1201033787, now seen corresponding path program 53 times [2020-07-21 13:25:44,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:44,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406866949] [2020-07-21 13:25:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:45,807 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:45,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:45,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 13:25:45,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7138 backedges. 556 proven. 583 refuted. 0 times theorem prover too weak. 5999 trivial. 0 not checked. [2020-07-21 13:25:46,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:49,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:49,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:49,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:49,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:50,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:50,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:50,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:50,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:50,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:50,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:50,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7138 backedges. 554 proven. 601 refuted. 0 times theorem prover too weak. 5983 trivial. 0 not checked. [2020-07-21 13:25:51,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406866949] [2020-07-21 13:25:51,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:51,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 13:25:51,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454527174] [2020-07-21 13:25:51,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:25:51,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:51,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:25:51,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:25:51,478 INFO L87 Difference]: Start difference. First operand 228 states and 452 transitions. Second operand 19 states. [2020-07-21 13:25:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:52,013 INFO L93 Difference]: Finished difference Result 300 states and 602 transitions. [2020-07-21 13:25:52,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:25:52,015 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 499 [2020-07-21 13:25:52,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:52,020 INFO L225 Difference]: With dead ends: 300 [2020-07-21 13:25:52,020 INFO L226 Difference]: Without dead ends: 282 [2020-07-21 13:25:52,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1003 GetRequests, 967 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:25:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-07-21 13:25:52,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 242. [2020-07-21 13:25:52,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-07-21 13:25:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 478 transitions. [2020-07-21 13:25:52,044 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 478 transitions. Word has length 499 [2020-07-21 13:25:52,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:52,044 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 478 transitions. [2020-07-21 13:25:52,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:25:52,044 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 478 transitions. [2020-07-21 13:25:52,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 13:25:52,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:52,049 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 33, 33, 28, 27, 20, 20, 20, 20, 20, 20, 20, 16, 16, 16, 16, 16, 16, 16, 13, 11, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:52,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:52,250 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:52,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:52,251 INFO L82 PathProgramCache]: Analyzing trace with hash -118703311, now seen corresponding path program 54 times [2020-07-21 13:25:52,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:52,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540379365] [2020-07-21 13:25:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:53,218 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:53,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:53,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:25:53,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7201 backedges. 561 proven. 682 refuted. 0 times theorem prover too weak. 5958 trivial. 0 not checked. [2020-07-21 13:25:53,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:57,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7201 backedges. 563 proven. 706 refuted. 0 times theorem prover too weak. 5932 trivial. 0 not checked. [2020-07-21 13:25:59,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540379365] [2020-07-21 13:25:59,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:59,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:25:59,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667136385] [2020-07-21 13:25:59,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:25:59,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:59,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:25:59,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:25:59,693 INFO L87 Difference]: Start difference. First operand 242 states and 478 transitions. Second operand 19 states. [2020-07-21 13:26:00,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:00,249 INFO L93 Difference]: Finished difference Result 290 states and 569 transitions. [2020-07-21 13:26:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:26:00,251 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 500 [2020-07-21 13:26:00,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:00,256 INFO L225 Difference]: With dead ends: 290 [2020-07-21 13:26:00,256 INFO L226 Difference]: Without dead ends: 278 [2020-07-21 13:26:00,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1006 GetRequests, 967 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:26:00,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-07-21 13:26:00,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 239. [2020-07-21 13:26:00,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-07-21 13:26:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 475 transitions. [2020-07-21 13:26:00,279 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 475 transitions. Word has length 500 [2020-07-21 13:26:00,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:00,279 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 475 transitions. [2020-07-21 13:26:00,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:26:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 475 transitions. [2020-07-21 13:26:00,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2020-07-21 13:26:00,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:00,284 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 33, 33, 28, 27, 21, 21, 21, 21, 21, 21, 21, 16, 16, 16, 16, 16, 16, 16, 15, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:00,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:00,485 INFO L427 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:00,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:00,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1073450836, now seen corresponding path program 55 times [2020-07-21 13:26:00,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:00,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669403913] [2020-07-21 13:26:00,487 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:01,485 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:01,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:01,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:26:01,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7605 backedges. 779 proven. 130 refuted. 0 times theorem prover too weak. 6696 trivial. 0 not checked. [2020-07-21 13:26:01,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:03,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:03,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:03,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:03,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:03,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:03,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:03,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:03,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:04,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:04,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7605 backedges. 779 proven. 144 refuted. 0 times theorem prover too weak. 6682 trivial. 0 not checked. [2020-07-21 13:26:06,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669403913] [2020-07-21 13:26:06,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:06,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:26:06,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143864636] [2020-07-21 13:26:06,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:26:06,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:06,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:26:06,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:26:06,129 INFO L87 Difference]: Start difference. First operand 239 states and 475 transitions. Second operand 15 states. [2020-07-21 13:26:06,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:06,555 INFO L93 Difference]: Finished difference Result 252 states and 488 transitions. [2020-07-21 13:26:06,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:26:06,555 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 512 [2020-07-21 13:26:06,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:06,558 INFO L225 Difference]: With dead ends: 252 [2020-07-21 13:26:06,558 INFO L226 Difference]: Without dead ends: 239 [2020-07-21 13:26:06,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 999 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:26:06,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-21 13:26:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 233. [2020-07-21 13:26:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-21 13:26:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 464 transitions. [2020-07-21 13:26:06,587 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 464 transitions. Word has length 512 [2020-07-21 13:26:06,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:06,587 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 464 transitions. [2020-07-21 13:26:06,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:26:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 464 transitions. [2020-07-21 13:26:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 13:26:06,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:06,593 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 27, 27, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 11, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:06,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:06,804 INFO L427 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:06,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:06,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1088300076, now seen corresponding path program 56 times [2020-07-21 13:26:06,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:06,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918572722] [2020-07-21 13:26:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:07,792 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:07,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:07,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 13:26:07,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 295 proven. 1051 refuted. 0 times theorem prover too weak. 6128 trivial. 0 not checked. [2020-07-21 13:26:08,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:11,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:12,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:12,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:13,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:13,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:14,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:14,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:14,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:14,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:14,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:14,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 296 proven. 1071 refuted. 0 times theorem prover too weak. 6107 trivial. 0 not checked. [2020-07-21 13:26:14,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918572722] [2020-07-21 13:26:14,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:14,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 13:26:14,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582995289] [2020-07-21 13:26:14,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:26:14,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:14,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:26:14,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:26:14,685 INFO L87 Difference]: Start difference. First operand 233 states and 464 transitions. Second operand 21 states. [2020-07-21 13:26:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:15,497 INFO L93 Difference]: Finished difference Result 351 states and 719 transitions. [2020-07-21 13:26:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:26:15,499 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 511 [2020-07-21 13:26:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:15,504 INFO L225 Difference]: With dead ends: 351 [2020-07-21 13:26:15,504 INFO L226 Difference]: Without dead ends: 236 [2020-07-21 13:26:15,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 987 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 13:26:15,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-21 13:26:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2020-07-21 13:26:15,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-21 13:26:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 453 transitions. [2020-07-21 13:26:15,526 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 453 transitions. Word has length 511 [2020-07-21 13:26:15,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:15,527 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 453 transitions. [2020-07-21 13:26:15,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:26:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 453 transitions. [2020-07-21 13:26:15,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 13:26:15,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:15,531 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 27, 27, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 11, 11, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:15,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:15,733 INFO L427 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:15,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2026950526, now seen corresponding path program 57 times [2020-07-21 13:26:15,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:15,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666693872] [2020-07-21 13:26:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:16,733 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:16,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:16,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 13:26:16,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6790 backedges. 471 proven. 463 refuted. 0 times theorem prover too weak. 5856 trivial. 0 not checked. [2020-07-21 13:26:17,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:19,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:19,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:19,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:20,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:20,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:20,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:20,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:20,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:20,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6790 backedges. 471 proven. 473 refuted. 0 times theorem prover too weak. 5846 trivial. 0 not checked. [2020-07-21 13:26:21,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666693872] [2020-07-21 13:26:21,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:21,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 13:26:21,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942974205] [2020-07-21 13:26:21,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:26:21,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:21,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:26:21,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:26:21,550 INFO L87 Difference]: Start difference. First operand 236 states and 453 transitions. Second operand 17 states. [2020-07-21 13:26:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:21,957 INFO L93 Difference]: Finished difference Result 284 states and 521 transitions. [2020-07-21 13:26:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:26:21,959 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 487 [2020-07-21 13:26:21,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:21,964 INFO L225 Difference]: With dead ends: 284 [2020-07-21 13:26:21,964 INFO L226 Difference]: Without dead ends: 267 [2020-07-21 13:26:21,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 947 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 13:26:21,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-07-21 13:26:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 245. [2020-07-21 13:26:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-07-21 13:26:21,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 468 transitions. [2020-07-21 13:26:21,985 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 468 transitions. Word has length 487 [2020-07-21 13:26:21,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:21,986 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 468 transitions. [2020-07-21 13:26:21,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:26:21,986 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 468 transitions. [2020-07-21 13:26:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 13:26:21,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:21,990 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 27, 27, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:22,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:22,191 INFO L427 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:22,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:22,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2025372537, now seen corresponding path program 58 times [2020-07-21 13:26:22,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:22,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650755610] [2020-07-21 13:26:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:23,201 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:23,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:23,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 13:26:23,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7110 backedges. 833 proven. 129 refuted. 0 times theorem prover too weak. 6148 trivial. 0 not checked. [2020-07-21 13:26:23,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:25,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:25,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:25,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:25,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:25,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:25,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:25,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:25,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:26,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:26,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7110 backedges. 831 proven. 141 refuted. 0 times theorem prover too weak. 6138 trivial. 0 not checked. [2020-07-21 13:26:28,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650755610] [2020-07-21 13:26:28,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:28,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 13:26:28,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204337905] [2020-07-21 13:26:28,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:26:28,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:28,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:26:28,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:26:28,136 INFO L87 Difference]: Start difference. First operand 245 states and 468 transitions. Second operand 17 states. [2020-07-21 13:26:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:28,657 INFO L93 Difference]: Finished difference Result 255 states and 478 transitions. [2020-07-21 13:26:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:26:28,657 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 499 [2020-07-21 13:26:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:28,661 INFO L225 Difference]: With dead ends: 255 [2020-07-21 13:26:28,661 INFO L226 Difference]: Without dead ends: 242 [2020-07-21 13:26:28,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 971 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 13:26:28,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-21 13:26:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-07-21 13:26:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-07-21 13:26:28,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 462 transitions. [2020-07-21 13:26:28,684 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 462 transitions. Word has length 499 [2020-07-21 13:26:28,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:28,684 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 462 transitions. [2020-07-21 13:26:28,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:26:28,684 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 462 transitions. [2020-07-21 13:26:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 13:26:28,689 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:28,689 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 28, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 11, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:28,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:28,891 INFO L427 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:28,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:28,891 INFO L82 PathProgramCache]: Analyzing trace with hash 371343025, now seen corresponding path program 59 times [2020-07-21 13:26:28,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:28,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131067933] [2020-07-21 13:26:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:29,924 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:29,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:29,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:26:29,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7149 backedges. 831 proven. 253 refuted. 0 times theorem prover too weak. 6065 trivial. 0 not checked. [2020-07-21 13:26:30,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:32,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:32,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:32,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:33,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:33,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:33,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:33,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:33,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:33,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:33,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:33,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7149 backedges. 833 proven. 269 refuted. 0 times theorem prover too weak. 6047 trivial. 0 not checked. [2020-07-21 13:26:35,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131067933] [2020-07-21 13:26:35,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:35,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:26:35,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969258956] [2020-07-21 13:26:35,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:26:35,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:35,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:26:35,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:26:35,283 INFO L87 Difference]: Start difference. First operand 242 states and 462 transitions. Second operand 17 states. [2020-07-21 13:26:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:35,725 INFO L93 Difference]: Finished difference Result 274 states and 503 transitions. [2020-07-21 13:26:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:26:35,727 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 500 [2020-07-21 13:26:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:35,731 INFO L225 Difference]: With dead ends: 274 [2020-07-21 13:26:35,731 INFO L226 Difference]: Without dead ends: 251 [2020-07-21 13:26:35,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1005 GetRequests, 971 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:26:35,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-07-21 13:26:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 239. [2020-07-21 13:26:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-07-21 13:26:35,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 453 transitions. [2020-07-21 13:26:35,752 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 453 transitions. Word has length 500 [2020-07-21 13:26:35,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:35,753 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 453 transitions. [2020-07-21 13:26:35,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:26:35,753 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 453 transitions. [2020-07-21 13:26:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 13:26:35,759 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:35,759 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 27, 26, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:35,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:35,974 INFO L427 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:35,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:35,975 INFO L82 PathProgramCache]: Analyzing trace with hash 2091423650, now seen corresponding path program 60 times [2020-07-21 13:26:35,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:35,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660091819] [2020-07-21 13:26:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:37,002 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:37,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:37,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:26:37,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6740 backedges. 726 proven. 130 refuted. 0 times theorem prover too weak. 5884 trivial. 0 not checked. [2020-07-21 13:26:37,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:38,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:38,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:39,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:39,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:39,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:39,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:39,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:39,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:39,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:40,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6740 backedges. 728 proven. 138 refuted. 0 times theorem prover too weak. 5874 trivial. 0 not checked. [2020-07-21 13:26:41,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660091819] [2020-07-21 13:26:41,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:41,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:26:41,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810664150] [2020-07-21 13:26:41,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:26:41,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:41,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:26:41,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:26:41,627 INFO L87 Difference]: Start difference. First operand 239 states and 453 transitions. Second operand 15 states. [2020-07-21 13:26:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:41,991 INFO L93 Difference]: Finished difference Result 271 states and 525 transitions. [2020-07-21 13:26:41,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:26:41,993 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 486 [2020-07-21 13:26:41,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:41,997 INFO L225 Difference]: With dead ends: 271 [2020-07-21 13:26:41,998 INFO L226 Difference]: Without dead ends: 261 [2020-07-21 13:26:41,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 947 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:26:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-07-21 13:26:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 236. [2020-07-21 13:26:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-21 13:26:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 448 transitions. [2020-07-21 13:26:42,026 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 448 transitions. Word has length 486 [2020-07-21 13:26:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:42,027 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 448 transitions. [2020-07-21 13:26:42,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:26:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 448 transitions. [2020-07-21 13:26:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 13:26:42,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:42,033 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 27, 27, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 11, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:42,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:42,234 INFO L427 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:42,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1713432090, now seen corresponding path program 61 times [2020-07-21 13:26:42,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:42,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139147963] [2020-07-21 13:26:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:43,277 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:43,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:43,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 13:26:43,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 765 proven. 221 refuted. 0 times theorem prover too weak. 6488 trivial. 0 not checked. [2020-07-21 13:26:43,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:45,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:45,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:45,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:46,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:46,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:46,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:46,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:46,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:47,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 765 proven. 231 refuted. 0 times theorem prover too weak. 6478 trivial. 0 not checked. [2020-07-21 13:26:48,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139147963] [2020-07-21 13:26:48,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:48,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 13:26:48,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580462936] [2020-07-21 13:26:48,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:26:48,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:48,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:26:48,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:26:48,494 INFO L87 Difference]: Start difference. First operand 236 states and 448 transitions. Second operand 17 states. [2020-07-21 13:26:48,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:48,939 INFO L93 Difference]: Finished difference Result 263 states and 477 transitions. [2020-07-21 13:26:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:26:48,941 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 511 [2020-07-21 13:26:48,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:48,945 INFO L225 Difference]: With dead ends: 263 [2020-07-21 13:26:48,946 INFO L226 Difference]: Without dead ends: 248 [2020-07-21 13:26:48,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1026 GetRequests, 995 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 13:26:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-07-21 13:26:48,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2020-07-21 13:26:48,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-21 13:26:48,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 442 transitions. [2020-07-21 13:26:48,969 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 442 transitions. Word has length 511 [2020-07-21 13:26:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:48,970 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 442 transitions. [2020-07-21 13:26:48,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:26:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 442 transitions. [2020-07-21 13:26:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 13:26:48,974 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:48,974 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 36, 36, 27, 27, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 12, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:49,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:49,175 INFO L427 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:49,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:49,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1756796764, now seen corresponding path program 62 times [2020-07-21 13:26:49,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:49,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381635092] [2020-07-21 13:26:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:50,328 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:50,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:50,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 13:26:50,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 624 proven. 724 refuted. 0 times theorem prover too weak. 6134 trivial. 0 not checked. [2020-07-21 13:26:50,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:54,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:54,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:55,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:56,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:56,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:56,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:56,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:56,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:57,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 621 proven. 748 refuted. 0 times theorem prover too weak. 6113 trivial. 0 not checked. [2020-07-21 13:26:57,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381635092] [2020-07-21 13:26:57,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:57,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 13:26:57,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512089202] [2020-07-21 13:26:57,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:26:57,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:57,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:26:57,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:26:57,919 INFO L87 Difference]: Start difference. First operand 233 states and 442 transitions. Second operand 21 states. [2020-07-21 13:26:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:58,675 INFO L93 Difference]: Finished difference Result 305 states and 576 transitions. [2020-07-21 13:26:58,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:26:58,677 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 511 [2020-07-21 13:26:58,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:58,684 INFO L225 Difference]: With dead ends: 305 [2020-07-21 13:26:58,684 INFO L226 Difference]: Without dead ends: 293 [2020-07-21 13:26:58,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 987 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 13:26:58,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-07-21 13:26:58,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 238. [2020-07-21 13:26:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-21 13:26:58,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 456 transitions. [2020-07-21 13:26:58,706 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 456 transitions. Word has length 511 [2020-07-21 13:26:58,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:58,706 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 456 transitions. [2020-07-21 13:26:58,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:26:58,707 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 456 transitions. [2020-07-21 13:26:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2020-07-21 13:26:58,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:58,711 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 36, 36, 27, 27, 21, 21, 21, 21, 21, 21, 21, 18, 18, 18, 18, 18, 18, 18, 16, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:58,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:58,912 INFO L427 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:58,913 INFO L82 PathProgramCache]: Analyzing trace with hash -110979246, now seen corresponding path program 63 times [2020-07-21 13:26:58,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:58,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83382002] [2020-07-21 13:26:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:59,989 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:59,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:59,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 13:26:59,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8286 backedges. 382 proven. 847 refuted. 0 times theorem prover too weak. 7057 trivial. 0 not checked. [2020-07-21 13:27:00,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:04,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:04,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:05,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:05,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:05,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:05,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:06,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:06,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:06,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:06,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:06,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:06,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8286 backedges. 384 proven. 861 refuted. 0 times theorem prover too weak. 7041 trivial. 0 not checked. [2020-07-21 13:27:06,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83382002] [2020-07-21 13:27:06,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:06,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 13:27:06,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581714705] [2020-07-21 13:27:06,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:27:06,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:06,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:27:06,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:27:06,890 INFO L87 Difference]: Start difference. First operand 238 states and 456 transitions. Second operand 19 states. [2020-07-21 13:27:07,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:07,522 INFO L93 Difference]: Finished difference Result 307 states and 600 transitions. [2020-07-21 13:27:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:27:07,525 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 535 [2020-07-21 13:27:07,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:07,532 INFO L225 Difference]: With dead ends: 307 [2020-07-21 13:27:07,532 INFO L226 Difference]: Without dead ends: 280 [2020-07-21 13:27:07,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1075 GetRequests, 1039 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:27:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-07-21 13:27:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 243. [2020-07-21 13:27:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-07-21 13:27:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 468 transitions. [2020-07-21 13:27:07,555 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 468 transitions. Word has length 535 [2020-07-21 13:27:07,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:07,555 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 468 transitions. [2020-07-21 13:27:07,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:27:07,555 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 468 transitions. [2020-07-21 13:27:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 13:27:07,559 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:07,559 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:07,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:07,760 INFO L427 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:07,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:07,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1688556098, now seen corresponding path program 64 times [2020-07-21 13:27:07,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:07,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559598938] [2020-07-21 13:27:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:08,846 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:08,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:08,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 13:27:08,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 811 proven. 300 refuted. 0 times theorem prover too weak. 5655 trivial. 0 not checked. [2020-07-21 13:27:09,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:11,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:11,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:12,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:12,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:12,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:12,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:12,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:13,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:13,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:13,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 811 proven. 314 refuted. 0 times theorem prover too weak. 5641 trivial. 0 not checked. [2020-07-21 13:27:15,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559598938] [2020-07-21 13:27:15,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:15,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 13:27:15,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737179405] [2020-07-21 13:27:15,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:27:15,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:15,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:27:15,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:27:15,066 INFO L87 Difference]: Start difference. First operand 243 states and 468 transitions. Second operand 19 states. [2020-07-21 13:27:15,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:15,711 INFO L93 Difference]: Finished difference Result 308 states and 582 transitions. [2020-07-21 13:27:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:27:15,714 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-21 13:27:15,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:15,719 INFO L225 Difference]: With dead ends: 308 [2020-07-21 13:27:15,719 INFO L226 Difference]: Without dead ends: 293 [2020-07-21 13:27:15,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:27:15,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-07-21 13:27:15,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 246. [2020-07-21 13:27:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-07-21 13:27:15,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 473 transitions. [2020-07-21 13:27:15,742 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 473 transitions. Word has length 487 [2020-07-21 13:27:15,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:15,742 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 473 transitions. [2020-07-21 13:27:15,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:27:15,742 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 473 transitions. [2020-07-21 13:27:15,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 13:27:15,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:15,747 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:15,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:15,948 INFO L427 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:15,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:15,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1985390764, now seen corresponding path program 65 times [2020-07-21 13:27:15,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:15,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726602817] [2020-07-21 13:27:15,949 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:17,013 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:17,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:17,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 13:27:17,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 380 proven. 731 refuted. 0 times theorem prover too weak. 5655 trivial. 0 not checked. [2020-07-21 13:27:17,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:20,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:21,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:21,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:22,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:22,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:22,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:22,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:22,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:22,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 382 proven. 743 refuted. 0 times theorem prover too weak. 5641 trivial. 0 not checked. [2020-07-21 13:27:23,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726602817] [2020-07-21 13:27:23,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:23,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 13:27:23,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110799501] [2020-07-21 13:27:23,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:27:23,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:23,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:27:23,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:27:23,182 INFO L87 Difference]: Start difference. First operand 246 states and 473 transitions. Second operand 19 states. [2020-07-21 13:27:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:23,772 INFO L93 Difference]: Finished difference Result 272 states and 502 transitions. [2020-07-21 13:27:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:27:23,775 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-21 13:27:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:23,778 INFO L225 Difference]: With dead ends: 272 [2020-07-21 13:27:23,779 INFO L226 Difference]: Without dead ends: 255 [2020-07-21 13:27:23,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:27:23,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-21 13:27:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 243. [2020-07-21 13:27:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-07-21 13:27:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 468 transitions. [2020-07-21 13:27:23,801 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 468 transitions. Word has length 487 [2020-07-21 13:27:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:23,801 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 468 transitions. [2020-07-21 13:27:23,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:27:23,801 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 468 transitions. [2020-07-21 13:27:23,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 13:27:23,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:23,805 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 27, 27, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:24,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:24,006 INFO L427 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:24,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:24,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1915856053, now seen corresponding path program 66 times [2020-07-21 13:27:24,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:24,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542273354] [2020-07-21 13:27:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:25,094 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:25,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:25,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 13:27:25,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7110 backedges. 508 proven. 633 refuted. 0 times theorem prover too weak. 5969 trivial. 0 not checked. [2020-07-21 13:27:25,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:29,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:29,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:29,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:29,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:30,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:30,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:30,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:30,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:30,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7110 backedges. 510 proven. 645 refuted. 0 times theorem prover too weak. 5955 trivial. 0 not checked. [2020-07-21 13:27:31,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542273354] [2020-07-21 13:27:31,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:31,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 13:27:31,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211935991] [2020-07-21 13:27:31,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:27:31,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:31,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:27:31,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:27:31,731 INFO L87 Difference]: Start difference. First operand 243 states and 468 transitions. Second operand 19 states. [2020-07-21 13:27:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:32,336 INFO L93 Difference]: Finished difference Result 304 states and 582 transitions. [2020-07-21 13:27:32,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:27:32,338 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 499 [2020-07-21 13:27:32,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:32,343 INFO L225 Difference]: With dead ends: 304 [2020-07-21 13:27:32,344 INFO L226 Difference]: Without dead ends: 287 [2020-07-21 13:27:32,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1003 GetRequests, 967 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:27:32,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-07-21 13:27:32,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 238. [2020-07-21 13:27:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-21 13:27:32,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 454 transitions. [2020-07-21 13:27:32,369 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 454 transitions. Word has length 499 [2020-07-21 13:27:32,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:32,369 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 454 transitions. [2020-07-21 13:27:32,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:27:32,370 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 454 transitions. [2020-07-21 13:27:32,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 13:27:32,373 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:32,374 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:32,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:32,575 INFO L427 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:32,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:32,575 INFO L82 PathProgramCache]: Analyzing trace with hash -855524837, now seen corresponding path program 67 times [2020-07-21 13:27:32,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:32,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992822263] [2020-07-21 13:27:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:33,667 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:33,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:33,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 13:27:33,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 847 proven. 232 refuted. 0 times theorem prover too weak. 5335 trivial. 0 not checked. [2020-07-21 13:27:33,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:36,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:36,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:37,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:37,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:37,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:37,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:37,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:37,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:38,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:38,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 845 proven. 250 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-21 13:27:39,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992822263] [2020-07-21 13:27:39,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:39,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 13:27:39,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20040061] [2020-07-21 13:27:39,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:27:39,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:39,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:27:39,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:27:39,955 INFO L87 Difference]: Start difference. First operand 238 states and 454 transitions. Second operand 19 states. [2020-07-21 13:27:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:40,480 INFO L93 Difference]: Finished difference Result 262 states and 480 transitions. [2020-07-21 13:27:40,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:27:40,480 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-21 13:27:40,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:40,484 INFO L225 Difference]: With dead ends: 262 [2020-07-21 13:27:40,484 INFO L226 Difference]: Without dead ends: 247 [2020-07-21 13:27:40,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:27:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-07-21 13:27:40,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 238. [2020-07-21 13:27:40,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-21 13:27:40,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 451 transitions. [2020-07-21 13:27:40,506 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 451 transitions. Word has length 475 [2020-07-21 13:27:40,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:40,507 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 451 transitions. [2020-07-21 13:27:40,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:27:40,507 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 451 transitions. [2020-07-21 13:27:40,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 13:27:40,510 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:40,510 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 28, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:40,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:40,711 INFO L427 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:40,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1739714417, now seen corresponding path program 68 times [2020-07-21 13:27:40,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:40,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150691894] [2020-07-21 13:27:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:41,885 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:41,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:41,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:27:41,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 871 proven. 320 refuted. 0 times theorem prover too weak. 5250 trivial. 0 not checked. [2020-07-21 13:27:42,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:44,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:44,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:45,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:47,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 875 proven. 340 refuted. 0 times theorem prover too weak. 5226 trivial. 0 not checked. [2020-07-21 13:27:48,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150691894] [2020-07-21 13:27:48,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:48,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:27:48,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993655693] [2020-07-21 13:27:48,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:27:48,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:48,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:27:48,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:27:48,742 INFO L87 Difference]: Start difference. First operand 238 states and 451 transitions. Second operand 19 states. [2020-07-21 13:27:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:49,381 INFO L93 Difference]: Finished difference Result 302 states and 570 transitions. [2020-07-21 13:27:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:27:49,381 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 476 [2020-07-21 13:27:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:49,389 INFO L225 Difference]: With dead ends: 302 [2020-07-21 13:27:49,389 INFO L226 Difference]: Without dead ends: 287 [2020-07-21 13:27:49,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 919 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:27:49,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-07-21 13:27:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 233. [2020-07-21 13:27:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-21 13:27:49,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 442 transitions. [2020-07-21 13:27:49,413 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 442 transitions. Word has length 476 [2020-07-21 13:27:49,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:49,413 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 442 transitions. [2020-07-21 13:27:49,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:27:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 442 transitions. [2020-07-21 13:27:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 13:27:49,417 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:49,417 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:49,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:49,619 INFO L427 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:49,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:49,620 INFO L82 PathProgramCache]: Analyzing trace with hash -527369408, now seen corresponding path program 69 times [2020-07-21 13:27:49,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:49,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113934984] [2020-07-21 13:27:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:50,738 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:50,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:50,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 13:27:50,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 933 proven. 343 refuted. 0 times theorem prover too weak. 5482 trivial. 0 not checked. [2020-07-21 13:27:51,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:54,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:54,386 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 13:27:55,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:56,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:56,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:56,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:56,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:56,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:56,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:56,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:57,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 930 proven. 367 refuted. 0 times theorem prover too weak. 5461 trivial. 0 not checked. [2020-07-21 13:27:58,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113934984] [2020-07-21 13:27:58,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:58,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 13:27:58,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420822896] [2020-07-21 13:27:58,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:27:58,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:58,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:27:58,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:27:58,923 INFO L87 Difference]: Start difference. First operand 233 states and 442 transitions. Second operand 21 states. [2020-07-21 13:27:59,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:59,737 INFO L93 Difference]: Finished difference Result 323 states and 618 transitions. [2020-07-21 13:27:59,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:27:59,739 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 487 [2020-07-21 13:27:59,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:59,746 INFO L225 Difference]: With dead ends: 323 [2020-07-21 13:27:59,746 INFO L226 Difference]: Without dead ends: 308 [2020-07-21 13:27:59,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 939 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 13:27:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-07-21 13:27:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 233. [2020-07-21 13:27:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-21 13:27:59,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 442 transitions. [2020-07-21 13:27:59,776 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 442 transitions. Word has length 487 [2020-07-21 13:27:59,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:59,777 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 442 transitions. [2020-07-21 13:27:59,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:27:59,777 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 442 transitions. [2020-07-21 13:27:59,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 13:27:59,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:59,782 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 27, 27, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 11, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:59,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:59,984 INFO L427 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:59,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:59,985 INFO L82 PathProgramCache]: Analyzing trace with hash -702045360, now seen corresponding path program 70 times [2020-07-21 13:27:59,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:59,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534336106] [2020-07-21 13:27:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:01,126 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:28:01,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:28:01,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 13:28:01,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:28:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 849 proven. 320 refuted. 0 times theorem prover too weak. 6305 trivial. 0 not checked. [2020-07-21 13:28:01,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:28:03,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:03,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:04,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:05,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:05,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:05,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:06,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:06,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 849 proven. 336 refuted. 0 times theorem prover too weak. 6289 trivial. 0 not checked. [2020-07-21 13:28:08,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534336106] [2020-07-21 13:28:08,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:28:08,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 13:28:08,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177003508] [2020-07-21 13:28:08,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:28:08,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:28:08,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:28:08,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:28:08,416 INFO L87 Difference]: Start difference. First operand 233 states and 442 transitions. Second operand 19 states. [2020-07-21 13:28:09,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:28:09,093 INFO L93 Difference]: Finished difference Result 284 states and 539 transitions. [2020-07-21 13:28:09,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:28:09,094 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 511 [2020-07-21 13:28:09,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:28:09,098 INFO L225 Difference]: With dead ends: 284 [2020-07-21 13:28:09,098 INFO L226 Difference]: Without dead ends: 261 [2020-07-21 13:28:09,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1027 GetRequests, 991 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:28:09,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-07-21 13:28:09,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 205. [2020-07-21 13:28:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-07-21 13:28:09,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 384 transitions. [2020-07-21 13:28:09,118 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 384 transitions. Word has length 511 [2020-07-21 13:28:09,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:28:09,118 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 384 transitions. [2020-07-21 13:28:09,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:28:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 384 transitions. [2020-07-21 13:28:09,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 13:28:09,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:28:09,122 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:28:09,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:09,323 INFO L427 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:28:09,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:28:09,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1832329655, now seen corresponding path program 71 times [2020-07-21 13:28:09,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:28:09,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066979767] [2020-07-21 13:28:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:11,211 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:28:11,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:28:11,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 13:28:11,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:28:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 563 proven. 518 refuted. 0 times theorem prover too weak. 5333 trivial. 0 not checked. [2020-07-21 13:28:11,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:28:14,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:14,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:15,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:15,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:15,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:15,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:16,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:16,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:16,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 563 proven. 532 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-21 13:28:17,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066979767] [2020-07-21 13:28:17,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:28:17,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 13:28:17,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502974314] [2020-07-21 13:28:17,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:28:17,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:28:17,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:28:17,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:28:17,302 INFO L87 Difference]: Start difference. First operand 205 states and 384 transitions. Second operand 19 states. [2020-07-21 13:28:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:28:17,852 INFO L93 Difference]: Finished difference Result 226 states and 406 transitions. [2020-07-21 13:28:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:28:17,854 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-21 13:28:17,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:28:17,857 INFO L225 Difference]: With dead ends: 226 [2020-07-21 13:28:17,857 INFO L226 Difference]: Without dead ends: 211 [2020-07-21 13:28:17,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:28:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-21 13:28:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 199. [2020-07-21 13:28:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-21 13:28:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 376 transitions. [2020-07-21 13:28:17,873 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 376 transitions. Word has length 475 [2020-07-21 13:28:17,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:28:17,873 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 376 transitions. [2020-07-21 13:28:17,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:28:17,873 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 376 transitions. [2020-07-21 13:28:17,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 13:28:17,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:28:17,877 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:28:18,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:18,077 INFO L427 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:28:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:28:18,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1570124953, now seen corresponding path program 72 times [2020-07-21 13:28:18,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:28:18,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39930183] [2020-07-21 13:28:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:19,229 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:28:19,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:28:19,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 13:28:19,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:28:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 772 proven. 138 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2020-07-21 13:28:19,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:28:21,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:21,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:21,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:21,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:21,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:21,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:21,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:22,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:22,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:22,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 770 proven. 150 refuted. 0 times theorem prover too weak. 5506 trivial. 0 not checked. [2020-07-21 13:28:24,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39930183] [2020-07-21 13:28:24,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:28:24,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 13:28:24,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008575109] [2020-07-21 13:28:24,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:28:24,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:28:24,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:28:24,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:28:24,315 INFO L87 Difference]: Start difference. First operand 199 states and 376 transitions. Second operand 17 states. [2020-07-21 13:28:24,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:28:24,780 INFO L93 Difference]: Finished difference Result 255 states and 481 transitions. [2020-07-21 13:28:24,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:28:24,782 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-21 13:28:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:28:24,787 INFO L225 Difference]: With dead ends: 255 [2020-07-21 13:28:24,787 INFO L226 Difference]: Without dead ends: 242 [2020-07-21 13:28:24,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 13:28:24,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-21 13:28:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 196. [2020-07-21 13:28:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-07-21 13:28:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 373 transitions. [2020-07-21 13:28:24,805 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 373 transitions. Word has length 475 [2020-07-21 13:28:24,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:28:24,805 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 373 transitions. [2020-07-21 13:28:24,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:28:24,805 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 373 transitions. [2020-07-21 13:28:24,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 13:28:24,809 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:28:24,809 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:28:25,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:25,023 INFO L427 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:28:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:28:25,024 INFO L82 PathProgramCache]: Analyzing trace with hash -582108663, now seen corresponding path program 73 times [2020-07-21 13:28:25,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:28:25,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798296248] [2020-07-21 13:28:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:26,177 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:28:26,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:28:26,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 13:28:26,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:28:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 930 proven. 151 refuted. 0 times theorem prover too weak. 5333 trivial. 0 not checked. [2020-07-21 13:28:26,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:28:28,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:29,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:29,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:29,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:29,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:29,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:30,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:30,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 928 proven. 167 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-21 13:28:32,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798296248] [2020-07-21 13:28:32,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:28:32,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 13:28:32,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692514825] [2020-07-21 13:28:32,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:28:32,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:28:32,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:28:32,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:28:32,210 INFO L87 Difference]: Start difference. First operand 196 states and 373 transitions. Second operand 19 states. [2020-07-21 13:28:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:28:32,782 INFO L93 Difference]: Finished difference Result 235 states and 427 transitions. [2020-07-21 13:28:32,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:28:32,782 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-21 13:28:32,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:28:32,786 INFO L225 Difference]: With dead ends: 235 [2020-07-21 13:28:32,786 INFO L226 Difference]: Without dead ends: 215 [2020-07-21 13:28:32,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:28:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-21 13:28:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 170. [2020-07-21 13:28:32,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-07-21 13:28:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 319 transitions. [2020-07-21 13:28:32,803 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 319 transitions. Word has length 475 [2020-07-21 13:28:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:28:32,803 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 319 transitions. [2020-07-21 13:28:32,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:28:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 319 transitions. [2020-07-21 13:28:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 13:28:32,807 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:28:32,808 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:28:33,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:33,019 INFO L427 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:28:33,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:28:33,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2032091979, now seen corresponding path program 74 times [2020-07-21 13:28:33,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:28:33,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489852548] [2020-07-21 13:28:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:34,188 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:28:34,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:28:34,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 13:28:34,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:28:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 401 proven. 839 refuted. 0 times theorem prover too weak. 5186 trivial. 0 not checked. [2020-07-21 13:28:34,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:28:38,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:38,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:39,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:39,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:40,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:40,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:40,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:40,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:40,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:41,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:41,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:41,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 400 proven. 861 refuted. 0 times theorem prover too weak. 5165 trivial. 0 not checked. [2020-07-21 13:28:41,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489852548] [2020-07-21 13:28:41,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:28:41,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 13:28:41,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366717149] [2020-07-21 13:28:41,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:28:41,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:28:41,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:28:41,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:28:41,802 INFO L87 Difference]: Start difference. First operand 170 states and 319 transitions. Second operand 21 states. [2020-07-21 13:28:42,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:28:42,436 INFO L93 Difference]: Finished difference Result 206 states and 372 transitions. [2020-07-21 13:28:42,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:28:42,439 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 475 [2020-07-21 13:28:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:28:42,442 INFO L225 Difference]: With dead ends: 206 [2020-07-21 13:28:42,442 INFO L226 Difference]: Without dead ends: 189 [2020-07-21 13:28:42,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 915 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 13:28:42,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-07-21 13:28:42,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 137. [2020-07-21 13:28:42,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-21 13:28:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 240 transitions. [2020-07-21 13:28:42,454 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 240 transitions. Word has length 475 [2020-07-21 13:28:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:28:42,454 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 240 transitions. [2020-07-21 13:28:42,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:28:42,455 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 240 transitions. [2020-07-21 13:28:42,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-21 13:28:42,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:28:42,457 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:28:42,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:42,658 INFO L427 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:28:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:28:42,659 INFO L82 PathProgramCache]: Analyzing trace with hash -477489234, now seen corresponding path program 75 times [2020-07-21 13:28:42,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:28:42,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761195313] [2020-07-21 13:28:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:43,835 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:28:43,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:28:43,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:28:43,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:28:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 228 proven. 1083 refuted. 0 times theorem prover too weak. 4798 trivial. 0 not checked. [2020-07-21 13:28:44,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:28:48,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:48,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:50,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:50,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:50,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:51,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:51,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:51,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:51,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:52,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:52,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:52,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:52,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:52,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 234 proven. 1110 refuted. 0 times theorem prover too weak. 4765 trivial. 0 not checked. [2020-07-21 13:28:52,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761195313] [2020-07-21 13:28:52,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:28:52,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 13:28:52,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363536420] [2020-07-21 13:28:52,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:28:52,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:28:52,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:28:52,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:28:52,361 INFO L87 Difference]: Start difference. First operand 137 states and 240 transitions. Second operand 21 states. [2020-07-21 13:28:53,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:28:53,233 INFO L93 Difference]: Finished difference Result 236 states and 444 transitions. [2020-07-21 13:28:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:28:53,236 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 464 [2020-07-21 13:28:53,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:28:53,239 INFO L225 Difference]: With dead ends: 236 [2020-07-21 13:28:53,239 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 13:28:53,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 891 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:28:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 13:28:53,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-07-21 13:28:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 13:28:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 189 transitions. [2020-07-21 13:28:53,251 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 189 transitions. Word has length 464 [2020-07-21 13:28:53,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:28:53,252 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 189 transitions. [2020-07-21 13:28:53,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:28:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 189 transitions. [2020-07-21 13:28:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 13:28:53,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:28:53,254 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:28:53,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:53,455 INFO L427 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:28:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:28:53,456 INFO L82 PathProgramCache]: Analyzing trace with hash 759223819, now seen corresponding path program 76 times [2020-07-21 13:28:53,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:28:53,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545890732] [2020-07-21 13:28:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:54,652 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:28:54,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:28:54,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 13:28:54,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:28:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 258 proven. 982 refuted. 0 times theorem prover too weak. 5186 trivial. 0 not checked. [2020-07-21 13:28:54,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:28:59,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:59,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:00,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:01,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:01,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:01,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:02,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:02,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:02,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:02,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 259 proven. 1002 refuted. 0 times theorem prover too weak. 5165 trivial. 0 not checked. [2020-07-21 13:29:02,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545890732] [2020-07-21 13:29:02,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:29:02,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 13:29:02,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460692377] [2020-07-21 13:29:02,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:29:02,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:29:02,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:29:02,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:29:02,688 INFO L87 Difference]: Start difference. First operand 134 states and 189 transitions. Second operand 21 states. [2020-07-21 13:29:03,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:29:03,555 INFO L93 Difference]: Finished difference Result 220 states and 301 transitions. [2020-07-21 13:29:03,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:29:03,558 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 475 [2020-07-21 13:29:03,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:29:03,561 INFO L225 Difference]: With dead ends: 220 [2020-07-21 13:29:03,561 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 13:29:03,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 915 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 13:29:03,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 13:29:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2020-07-21 13:29:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 13:29:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2020-07-21 13:29:03,572 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 475 [2020-07-21 13:29:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:29:03,573 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2020-07-21 13:29:03,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:29:03,573 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2020-07-21 13:29:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 13:29:03,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:29:03,575 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:29:03,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:29:03,777 INFO L427 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:29:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:29:03,777 INFO L82 PathProgramCache]: Analyzing trace with hash -247769445, now seen corresponding path program 77 times [2020-07-21 13:29:03,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:29:03,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196262567] [2020-07-21 13:29:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:29:05,072 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:29:05,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:29:05,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 13:29:05,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:29:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 258 proven. 1140 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2020-07-21 13:29:05,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:29:10,364 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 13:29:10,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:12,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:12,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:13,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:14,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:14,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:14,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:14,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:14,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:14,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:15,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:15,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:29:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 255 proven. 1173 refuted. 0 times theorem prover too weak. 4986 trivial. 0 not checked. [2020-07-21 13:29:15,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196262567] [2020-07-21 13:29:15,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:29:15,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 23 [2020-07-21 13:29:15,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197540262] [2020-07-21 13:29:15,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 13:29:15,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:29:15,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 13:29:15,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:29:15,363 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand 23 states. [2020-07-21 13:29:16,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:29:16,271 INFO L93 Difference]: Finished difference Result 203 states and 251 transitions. [2020-07-21 13:29:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 13:29:16,275 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 475 [2020-07-21 13:29:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:29:16,278 INFO L225 Difference]: With dead ends: 203 [2020-07-21 13:29:16,278 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 13:29:16,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 911 SyntacticMatches, 17 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2020-07-21 13:29:16,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 13:29:16,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 13:29:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 13:29:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 13:29:16,286 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 475 [2020-07-21 13:29:16,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:29:16,286 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 13:29:16,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 13:29:16,286 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 13:29:16,286 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 13:29:16,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:29:16,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 13:29:22,217 WARN L193 SmtUtils]: Spent 4.94 s on a formula simplification. DAG size of input: 590 DAG size of output: 238 [2020-07-21 13:29:22,632 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 91 [2020-07-21 13:29:22,972 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 91 [2020-07-21 13:29:27,450 WARN L193 SmtUtils]: Spent 4.48 s on a formula simplification. DAG size of input: 607 DAG size of output: 244 [2020-07-21 13:29:30,025 WARN L193 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 523 DAG size of output: 192 [2020-07-21 13:29:30,508 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 101 [2020-07-21 13:29:30,844 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 90 [2020-07-21 13:29:34,669 WARN L193 SmtUtils]: Spent 3.82 s on a formula simplification. DAG size of input: 590 DAG size of output: 238 [2020-07-21 13:29:36,784 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 487 DAG size of output: 196 [2020-07-21 13:29:37,085 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 87 [2020-07-21 13:29:37,401 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 85 [2020-07-21 13:29:43,955 WARN L193 SmtUtils]: Spent 6.55 s on a formula simplification. DAG size of input: 679 DAG size of output: 265 [2020-07-21 13:29:50,242 WARN L193 SmtUtils]: Spent 6.24 s on a formula simplification. DAG size of input: 671 DAG size of output: 263 [2020-07-21 13:29:52,466 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 500 DAG size of output: 190 [2020-07-21 13:29:58,870 WARN L193 SmtUtils]: Spent 6.40 s on a formula simplification. DAG size of input: 679 DAG size of output: 265 [2020-07-21 13:30:05,455 WARN L193 SmtUtils]: Spent 6.58 s on a formula simplification. DAG size of input: 671 DAG size of output: 263 [2020-07-21 13:30:11,907 WARN L193 SmtUtils]: Spent 6.45 s on a formula simplification. DAG size of input: 661 DAG size of output: 273 [2020-07-21 13:30:12,279 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 91 [2020-07-21 13:30:13,921 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 437 DAG size of output: 178 [2020-07-21 13:30:20,538 WARN L193 SmtUtils]: Spent 6.61 s on a formula simplification. DAG size of input: 671 DAG size of output: 265 [2020-07-21 13:30:26,985 WARN L193 SmtUtils]: Spent 6.40 s on a formula simplification. DAG size of input: 668 DAG size of output: 277 [2020-07-21 13:30:33,302 WARN L193 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 679 DAG size of output: 265 [2020-07-21 13:30:40,154 WARN L193 SmtUtils]: Spent 6.82 s on a formula simplification. DAG size of input: 669 DAG size of output: 265 [2020-07-21 13:30:40,473 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 91 [2020-07-21 13:30:47,087 WARN L193 SmtUtils]: Spent 6.61 s on a formula simplification. DAG size of input: 661 DAG size of output: 263 [2020-07-21 13:30:52,930 WARN L193 SmtUtils]: Spent 5.84 s on a formula simplification. DAG size of input: 663 DAG size of output: 259 [2020-07-21 13:30:55,224 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 500 DAG size of output: 210 [2020-07-21 13:30:58,414 WARN L193 SmtUtils]: Spent 3.19 s on a formula simplification. DAG size of input: 556 DAG size of output: 200 [2020-07-21 13:30:58,701 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 84 [2020-07-21 13:30:59,227 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 107 [2020-07-21 13:31:03,781 WARN L193 SmtUtils]: Spent 4.55 s on a formula simplification. DAG size of input: 612 DAG size of output: 247 [2020-07-21 13:31:04,059 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 89 [2020-07-21 13:31:05,884 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 471 DAG size of output: 189 [2020-07-21 13:31:12,066 WARN L193 SmtUtils]: Spent 6.18 s on a formula simplification. DAG size of input: 671 DAG size of output: 263 [2020-07-21 13:31:18,462 WARN L193 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 679 DAG size of output: 265 [2020-07-21 13:31:21,174 WARN L193 SmtUtils]: Spent 2.71 s on a formula simplification. DAG size of input: 533 DAG size of output: 199 [2020-07-21 13:31:27,619 WARN L193 SmtUtils]: Spent 6.44 s on a formula simplification. DAG size of input: 679 DAG size of output: 265 [2020-07-21 13:31:27,813 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 78 [2020-07-21 13:31:30,721 WARN L193 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 534 DAG size of output: 219 [2020-07-21 13:31:37,222 WARN L193 SmtUtils]: Spent 6.46 s on a formula simplification. DAG size of input: 663 DAG size of output: 263 [2020-07-21 13:31:39,503 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 505 DAG size of output: 200 [2020-07-21 13:31:44,045 WARN L193 SmtUtils]: Spent 4.54 s on a formula simplification. DAG size of input: 612 DAG size of output: 247 [2020-07-21 13:31:46,627 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 525 DAG size of output: 198 [2020-07-21 13:31:53,327 WARN L193 SmtUtils]: Spent 6.70 s on a formula simplification. DAG size of input: 671 DAG size of output: 265 [2020-07-21 13:31:53,691 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 87 [2020-07-21 13:32:00,165 WARN L193 SmtUtils]: Spent 6.47 s on a formula simplification. DAG size of input: 663 DAG size of output: 263 [2020-07-21 13:32:02,740 WARN L193 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 525 DAG size of output: 198 [2020-07-21 13:32:03,065 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 91 [2020-07-21 13:32:03,390 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 91 [2020-07-21 13:32:10,285 WARN L193 SmtUtils]: Spent 6.89 s on a formula simplification. DAG size of input: 669 DAG size of output: 265 [2020-07-21 13:32:16,514 WARN L193 SmtUtils]: Spent 6.23 s on a formula simplification. DAG size of input: 671 DAG size of output: 263 [2020-07-21 13:32:22,981 WARN L193 SmtUtils]: Spent 6.46 s on a formula simplification. DAG size of input: 679 DAG size of output: 265 [2020-07-21 13:32:29,772 WARN L193 SmtUtils]: Spent 6.79 s on a formula simplification. DAG size of input: 661 DAG size of output: 263 [2020-07-21 13:32:29,938 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 74 [2020-07-21 13:32:32,929 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 537 DAG size of output: 209 [2020-07-21 13:32:39,309 WARN L193 SmtUtils]: Spent 6.38 s on a formula simplification. DAG size of input: 661 DAG size of output: 273 [2020-07-21 13:32:41,609 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 505 DAG size of output: 200 [2020-07-21 13:32:43,618 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 480 DAG size of output: 187 [2020-07-21 13:32:45,933 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 505 DAG size of output: 200 [2020-07-21 13:32:48,434 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 503 DAG size of output: 190 [2020-07-21 13:32:48,781 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 98 [2020-07-21 13:32:48,885 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 54 [2020-07-21 13:32:55,381 WARN L193 SmtUtils]: Spent 6.49 s on a formula simplification. DAG size of input: 679 DAG size of output: 265 [2020-07-21 13:32:55,709 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 91 [2020-07-21 13:32:55,879 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 74 [2020-07-21 13:32:56,059 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 76 [2020-07-21 13:33:02,432 WARN L193 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 670 DAG size of output: 267 [2020-07-21 13:33:02,740 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 87 [2020-07-21 13:33:03,232 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 110 [2020-07-21 13:33:09,831 WARN L193 SmtUtils]: Spent 6.60 s on a formula simplification. DAG size of input: 663 DAG size of output: 263 [2020-07-21 13:33:10,251 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 104 [2020-07-21 13:33:16,963 WARN L193 SmtUtils]: Spent 6.71 s on a formula simplification. DAG size of input: 671 DAG size of output: 265 [2020-07-21 13:33:19,960 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 537 DAG size of output: 209 [2020-07-21 13:33:20,331 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 96 [2020-07-21 13:33:27,296 WARN L193 SmtUtils]: Spent 6.96 s on a formula simplification. DAG size of input: 669 DAG size of output: 265 [2020-07-21 13:33:29,924 WARN L193 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 523 DAG size of output: 192 [2020-07-21 13:33:30,611 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 131 [2020-07-21 13:33:30,746 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 59 [2020-07-21 13:33:31,071 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 91 [2020-07-21 13:33:37,301 WARN L193 SmtUtils]: Spent 6.23 s on a formula simplification. DAG size of input: 670 DAG size of output: 267 [2020-07-21 13:33:39,265 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 458 DAG size of output: 183 [2020-07-21 13:33:42,437 WARN L193 SmtUtils]: Spent 3.17 s on a formula simplification. DAG size of input: 540 DAG size of output: 221