/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:30:08,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:30:08,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:30:08,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:30:08,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:30:08,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:30:08,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:30:08,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:30:08,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:30:08,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:30:08,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:30:08,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:30:08,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:30:08,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:30:08,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:30:08,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:30:08,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:30:08,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:30:08,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:30:08,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:30:08,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:30:08,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:30:08,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:30:08,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:30:08,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 19:30:08,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 19:30:08,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 19:30:08,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 19:30:08,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 19:30:08,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 19:30:08,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 19:30:08,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 19:30:08,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 19:30:08,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 19:30:08,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 19:30:08,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 19:30:08,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 19:30:08,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 19:30:08,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:30:08,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:30:08,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:30:08,478 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 19:30:08,502 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:30:08,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:30:08,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:30:08,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:30:08,506 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:30:08,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:30:08,506 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:30:08,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:30:08,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:30:08,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:30:08,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:30:08,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:30:08,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:30:08,508 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:30:08,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:30:08,509 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:30:08,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:30:08,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:30:08,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:30:08,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:30:08,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:30:08,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:30:08,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:30:08,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:30:08,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:30:08,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:30:08,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:08,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:30:08,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:30:08,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 19:30:08,830 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:30:08,845 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:30:08,849 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:30:08,851 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:30:08,851 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:30:08,852 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2020-07-21 19:30:08,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb07fd8e3/316a86b4afa34b068c8d7e43077c8e77/FLAGf231e8e39 [2020-07-21 19:30:09,438 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:30:09,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2020-07-21 19:30:09,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb07fd8e3/316a86b4afa34b068c8d7e43077c8e77/FLAGf231e8e39 [2020-07-21 19:30:09,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb07fd8e3/316a86b4afa34b068c8d7e43077c8e77 [2020-07-21 19:30:09,836 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:30:09,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:30:09,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:30:09,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:30:09,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:30:09,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:30:09" (1/1) ... [2020-07-21 19:30:09,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8fc4775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:09, skipping insertion in model container [2020-07-21 19:30:09,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:30:09" (1/1) ... [2020-07-21 19:30:09,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:30:09,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:30:10,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:30:10,035 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:30:10,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:30:10,067 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:30:10,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:10 WrapperNode [2020-07-21 19:30:10,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:30:10,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:30:10,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:30:10,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:30:10,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:10" (1/1) ... [2020-07-21 19:30:10,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:10" (1/1) ... [2020-07-21 19:30:10,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:10" (1/1) ... [2020-07-21 19:30:10,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:10" (1/1) ... [2020-07-21 19:30:10,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:10" (1/1) ... [2020-07-21 19:30:10,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:10" (1/1) ... [2020-07-21 19:30:10,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:10" (1/1) ... [2020-07-21 19:30:10,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:30:10,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:30:10,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:30:10,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:30:10,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:10" (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 19:30:10,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:30:10,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:30:10,243 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-21 19:30:10,243 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:30:10,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:30:10,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:30:10,244 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-21 19:30:10,244 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:30:10,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:30:10,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:30:10,451 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:30:10,452 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:30:10,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:30:10 BoogieIcfgContainer [2020-07-21 19:30:10,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:30:10,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:30:10,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:30:10,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:30:10,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:30:09" (1/3) ... [2020-07-21 19:30:10,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40e1792b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:30:10, skipping insertion in model container [2020-07-21 19:30:10,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:10" (2/3) ... [2020-07-21 19:30:10,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40e1792b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:30:10, skipping insertion in model container [2020-07-21 19:30:10,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:30:10" (3/3) ... [2020-07-21 19:30:10,490 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_20-2.c [2020-07-21 19:30:10,517 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:30:10,529 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:30:10,545 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:30:10,568 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:30:10,569 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:30:10,569 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:30:10,569 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:30:10,569 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:30:10,569 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:30:10,570 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:30:10,570 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:30:10,589 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 19:30:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 19:30:10,597 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:10,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:10,599 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:10,606 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-21 19:30:10,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:10,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760722147] [2020-07-21 19:30:10,616 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 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 19:30:10,680 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:30:10,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:10,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:30:10,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:10,783 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 19:30:10,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:30:10,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760722147] [2020-07-21 19:30:10,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:30:10,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:30:10,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115822631] [2020-07-21 19:30:10,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:30:10,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:10,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:30:10,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:30:10,805 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 19:30:10,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:10,920 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 19:30:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:30:10,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 19:30:10,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:10,933 INFO L225 Difference]: With dead ends: 35 [2020-07-21 19:30:10,933 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 19:30:10,936 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 19:30:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 19:30:10,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 19:30:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 19:30:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 19:30:10,985 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 19:30:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:10,986 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 19:30:10,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:30:10,986 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 19:30:10,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 19:30:10,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:10,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:11,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:11,206 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:11,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:11,207 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-21 19:30:11,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:11,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071452355] [2020-07-21 19:30:11,208 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 19:30:11,231 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:30:11,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:11,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:30:11,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:30:11,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:30:11,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071452355] [2020-07-21 19:30:11,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:30:11,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:30:11,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387667818] [2020-07-21 19:30:11,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:30:11,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:11,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:30:11,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:30:11,276 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 19:30:11,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:11,344 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 19:30:11,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:30:11,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 19:30:11,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:11,347 INFO L225 Difference]: With dead ends: 27 [2020-07-21 19:30:11,347 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 19:30:11,349 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 19:30:11,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 19:30:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 19:30:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 19:30:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 19:30:11,358 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 19:30:11,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:11,358 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 19:30:11,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:30:11,359 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 19:30:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 19:30:11,360 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:11,360 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:11,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:11,574 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:11,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:11,576 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-21 19:30:11,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:11,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675927021] [2020-07-21 19:30:11,579 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 19:30:11,623 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:11,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:11,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:30:11,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 19:30:11,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:11,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 19:30:11,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675927021] [2020-07-21 19:30:11,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:11,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 19:30:11,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434638193] [2020-07-21 19:30:11,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 19:30:11,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:11,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 19:30:11,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 19:30:11,919 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 19:30:12,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:12,036 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 19:30:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 19:30:12,037 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 19:30:12,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:12,039 INFO L225 Difference]: With dead ends: 32 [2020-07-21 19:30:12,039 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 19:30:12,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:30:12,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 19:30:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 19:30:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 19:30:12,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 19:30:12,050 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 19:30:12,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:12,051 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 19:30:12,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 19:30:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 19:30:12,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 19:30:12,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:12,053 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:12,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:12,255 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:12,256 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-21 19:30:12,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:12,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608998790] [2020-07-21 19:30:12,258 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 19:30:12,300 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:12,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:12,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:30:12,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 19:30:12,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:12,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 19:30:12,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608998790] [2020-07-21 19:30:12,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:12,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 19:30:12,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24499564] [2020-07-21 19:30:12,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 19:30:12,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:12,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 19:30:12,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 19:30:12,534 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 19:30:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:12,612 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 19:30:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 19:30:12,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 19:30:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:12,615 INFO L225 Difference]: With dead ends: 37 [2020-07-21 19:30:12,616 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 19:30:12,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:30:12,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 19:30:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 19:30:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 19:30:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 19:30:12,626 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 19:30:12,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:12,626 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 19:30:12,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 19:30:12,626 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 19:30:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 19:30:12,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:12,628 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:12,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:12,842 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:12,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:12,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-21 19:30:12,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:12,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885573315] [2020-07-21 19:30:12,845 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 19:30:12,883 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:12,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:12,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:30:12,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 19:30:12,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:13,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:13,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:13,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:13,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 19:30:13,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885573315] [2020-07-21 19:30:13,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:13,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 19:30:13,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219875525] [2020-07-21 19:30:13,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 19:30:13,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:13,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 19:30:13,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:30:13,349 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 19:30:13,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:13,517 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 19:30:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:30:13,518 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 19:30:13,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:13,520 INFO L225 Difference]: With dead ends: 42 [2020-07-21 19:30:13,521 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 19:30:13,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:30:13,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 19:30:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 19:30:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 19:30:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 19:30:13,532 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 19:30:13,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:13,533 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 19:30:13,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 19:30:13,533 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 19:30:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 19:30:13,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:13,535 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:13,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:13,745 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:13,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-21 19:30:13,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:13,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541124704] [2020-07-21 19:30:13,747 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 19:30:13,787 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:13,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:13,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:30:13,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 19:30:13,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:14,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:14,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:14,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 19:30:14,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541124704] [2020-07-21 19:30:14,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:14,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 19:30:14,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167031894] [2020-07-21 19:30:14,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 19:30:14,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:14,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 19:30:14,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:30:14,181 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 19:30:14,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:14,329 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 19:30:14,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:30:14,330 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 19:30:14,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:14,332 INFO L225 Difference]: With dead ends: 47 [2020-07-21 19:30:14,332 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 19:30:14,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:30:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 19:30:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 19:30:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 19:30:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 19:30:14,361 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 19:30:14,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:14,362 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 19:30:14,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 19:30:14,362 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 19:30:14,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 19:30:14,372 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:14,372 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:14,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:14,589 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:14,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:14,590 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-21 19:30:14,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:14,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480101140] [2020-07-21 19:30:14,591 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 19:30:14,638 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:14,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:14,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:30:14,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 19:30:14,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:15,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:15,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:15,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:15,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:15,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 19:30:15,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480101140] [2020-07-21 19:30:15,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:15,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 19:30:15,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839382745] [2020-07-21 19:30:15,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:30:15,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:15,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:30:15,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:30:15,348 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 19:30:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:15,534 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 19:30:15,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:30:15,535 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 19:30:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:15,541 INFO L225 Difference]: With dead ends: 52 [2020-07-21 19:30:15,541 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 19:30:15,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:30:15,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 19:30:15,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 19:30:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 19:30:15,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 19:30:15,565 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 19:30:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:15,566 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 19:30:15,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:30:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 19:30:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 19:30:15,573 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:15,574 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:15,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:15,775 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:15,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:15,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-21 19:30:15,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:15,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579502194] [2020-07-21 19:30:15,777 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 19:30:15,858 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:15,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:15,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:30:15,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-21 19:30:15,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:16,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:16,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:16,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:16,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-21 19:30:16,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579502194] [2020-07-21 19:30:16,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:16,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 19:30:16,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099845165] [2020-07-21 19:30:16,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:30:16,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:16,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:30:16,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:30:16,614 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-21 19:30:16,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:16,763 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 19:30:16,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:30:16,765 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-21 19:30:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:16,768 INFO L225 Difference]: With dead ends: 57 [2020-07-21 19:30:16,768 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 19:30:16,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:30:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 19:30:16,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 19:30:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 19:30:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 19:30:16,781 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-21 19:30:16,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:16,782 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 19:30:16,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:30:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 19:30:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 19:30:16,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:16,784 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:16,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:16,988 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:16,989 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-21 19:30:16,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:16,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389833473] [2020-07-21 19:30:16,991 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 19:30:17,068 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:17,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:17,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:30:17,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 19:30:17,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:17,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:17,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:18,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:18,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:18,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 19:30:18,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389833473] [2020-07-21 19:30:18,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:18,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 19:30:18,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495870978] [2020-07-21 19:30:18,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:30:18,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:18,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:30:18,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:30:18,193 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-21 19:30:18,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:18,496 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 19:30:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:30:18,497 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-07-21 19:30:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:18,499 INFO L225 Difference]: With dead ends: 62 [2020-07-21 19:30:18,500 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 19:30:18,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:30:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 19:30:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 19:30:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 19:30:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 19:30:18,514 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-21 19:30:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:18,515 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 19:30:18,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:30:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 19:30:18,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 19:30:18,518 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:18,518 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:18,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:18,732 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:18,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:18,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-21 19:30:18,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:18,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725915588] [2020-07-21 19:30:18,735 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 19:30:18,827 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:18,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:18,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:30:18,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 506 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-07-21 19:30:18,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:19,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:19,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:19,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:19,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:19,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:19,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 532 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2020-07-21 19:30:20,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725915588] [2020-07-21 19:30:20,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:20,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 19:30:20,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412890677] [2020-07-21 19:30:20,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:30:20,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:20,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:30:20,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:30:20,043 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-21 19:30:20,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:20,199 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-21 19:30:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:30:20,200 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-21 19:30:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:20,203 INFO L225 Difference]: With dead ends: 67 [2020-07-21 19:30:20,204 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 19:30:20,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:30:20,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 19:30:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-21 19:30:20,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 19:30:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 19:30:20,218 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 190 [2020-07-21 19:30:20,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:20,219 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 19:30:20,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:30:20,219 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 19:30:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 19:30:20,223 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:20,223 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:20,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:20,436 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:20,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1082984306, now seen corresponding path program 5 times [2020-07-21 19:30:20,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:20,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482838938] [2020-07-21 19:30:20,438 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 19:30:20,568 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:20,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:20,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:30:20,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-21 19:30:20,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:21,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:22,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:22,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:22,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:22,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:22,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-21 19:30:22,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482838938] [2020-07-21 19:30:22,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:22,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 19:30:22,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695981287] [2020-07-21 19:30:22,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:30:22,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:22,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:30:22,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:30:22,708 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-21 19:30:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:22,950 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-21 19:30:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:30:22,950 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-21 19:30:22,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:22,953 INFO L225 Difference]: With dead ends: 72 [2020-07-21 19:30:22,954 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 19:30:22,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:30:22,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 19:30:22,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-21 19:30:22,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 19:30:22,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 19:30:22,985 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-21 19:30:22,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:22,986 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 19:30:22,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:30:22,986 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 19:30:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-21 19:30:22,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:22,994 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:23,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:23,207 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:23,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:23,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1006419304, now seen corresponding path program 5 times [2020-07-21 19:30:23,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:23,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963285798] [2020-07-21 19:30:23,209 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 19:30:23,353 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:23,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:23,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:30:23,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-21 19:30:23,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:24,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:25,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:25,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:25,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:25,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:25,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-21 19:30:25,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963285798] [2020-07-21 19:30:25,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:25,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 19:30:25,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015439662] [2020-07-21 19:30:25,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:30:25,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:25,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:30:25,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:30:25,421 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-21 19:30:25,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:25,640 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-21 19:30:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:30:25,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 299 [2020-07-21 19:30:25,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:25,646 INFO L225 Difference]: With dead ends: 77 [2020-07-21 19:30:25,646 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 19:30:25,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 570 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:30:25,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 19:30:25,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-21 19:30:25,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 19:30:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 19:30:25,664 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-21 19:30:25,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:25,666 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 19:30:25,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:30:25,666 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 19:30:25,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 19:30:25,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:25,676 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 39, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:25,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:25,890 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:25,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:25,891 INFO L82 PathProgramCache]: Analyzing trace with hash 785285043, now seen corresponding path program 6 times [2020-07-21 19:30:25,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:25,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730748161] [2020-07-21 19:30:25,892 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 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 19:30:26,102 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:26,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:26,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:30:26,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2126 refuted. 0 times theorem prover too weak. 12702 trivial. 0 not checked. [2020-07-21 19:30:26,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:28,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:28,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:29,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:29,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:29,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:29,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:29,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:29,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2177 refuted. 0 times theorem prover too weak. 12651 trivial. 0 not checked. [2020-07-21 19:30:29,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730748161] [2020-07-21 19:30:29,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:29,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 19:30:29,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886852283] [2020-07-21 19:30:29,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:30:29,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:29,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:30:29,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:30:29,690 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-21 19:30:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:30,139 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-21 19:30:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:30:30,140 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 507 [2020-07-21 19:30:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:30,144 INFO L225 Difference]: With dead ends: 82 [2020-07-21 19:30:30,144 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 19:30:30,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 983 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:30:30,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 19:30:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-21 19:30:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 19:30:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 19:30:30,158 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 507 [2020-07-21 19:30:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:30,159 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 19:30:30,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:30:30,160 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 19:30:30,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 19:30:30,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:30,163 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 53, 32, 32, 32, 32, 32, 32, 32, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:30,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:30,378 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:30,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:30,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1350718391, now seen corresponding path program 6 times [2020-07-21 19:30:30,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:30,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224873891] [2020-07-21 19:30:30,380 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 19:30:30,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:30,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:30,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:30:30,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1918 refuted. 0 times theorem prover too weak. 9431 trivial. 0 not checked. [2020-07-21 19:30:30,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:32,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1975 refuted. 0 times theorem prover too weak. 9374 trivial. 0 not checked. [2020-07-21 19:30:33,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224873891] [2020-07-21 19:30:33,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:33,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 19:30:33,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567924217] [2020-07-21 19:30:33,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:30:33,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:33,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:30:33,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:30:33,858 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-21 19:30:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:34,127 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-21 19:30:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:30:34,128 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 450 [2020-07-21 19:30:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:34,132 INFO L225 Difference]: With dead ends: 87 [2020-07-21 19:30:34,132 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 19:30:34,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 868 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:30:34,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 19:30:34,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-21 19:30:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 19:30:34,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 19:30:34,147 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 450 [2020-07-21 19:30:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:34,148 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 19:30:34,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:30:34,148 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 19:30:34,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2020-07-21 19:30:34,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:34,160 INFO L422 BasicCegarLoop]: trace histogram [163, 163, 82, 81, 81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:34,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:34,373 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:34,374 INFO L82 PathProgramCache]: Analyzing trace with hash 40336450, now seen corresponding path program 7 times [2020-07-21 19:30:34,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:34,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458974109] [2020-07-21 19:30:34,375 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 19:30:34,829 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:34,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:34,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 2379 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:30:34,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 69012 backedges. 797 proven. 5632 refuted. 0 times theorem prover too weak. 62583 trivial. 0 not checked. [2020-07-21 19:30:35,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:39,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:39,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:40,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:40,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:40,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:41,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:41,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:41,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:41,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:41,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:41,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:41,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 69012 backedges. 797 proven. 5702 refuted. 0 times theorem prover too weak. 62513 trivial. 0 not checked. [2020-07-21 19:30:42,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458974109] [2020-07-21 19:30:42,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:42,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 19:30:42,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936203459] [2020-07-21 19:30:42,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:30:42,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:42,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:30:42,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:30:42,109 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-21 19:30:42,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:42,742 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-21 19:30:42,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:30:42,743 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1066 [2020-07-21 19:30:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:42,748 INFO L225 Difference]: With dead ends: 92 [2020-07-21 19:30:42,748 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 19:30:42,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2140 GetRequests, 2097 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:30:42,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 19:30:42,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-21 19:30:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 19:30:42,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 19:30:42,762 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1066 [2020-07-21 19:30:42,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:42,763 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 19:30:42,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:30:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 19:30:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2020-07-21 19:30:42,769 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:42,769 INFO L422 BasicCegarLoop]: trace histogram [101, 101, 84, 50, 50, 50, 50, 50, 50, 50, 34, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:42,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:42,983 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:42,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:42,983 INFO L82 PathProgramCache]: Analyzing trace with hash 822363973, now seen corresponding path program 7 times [2020-07-21 19:30:42,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:42,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552354588] [2020-07-21 19:30:42,984 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 19:30:43,285 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:43,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:43,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:30:43,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 28586 backedges. 537 proven. 3626 refuted. 0 times theorem prover too weak. 24423 trivial. 0 not checked. [2020-07-21 19:30:43,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:46,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:46,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:47,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:47,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:47,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:47,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:47,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:48,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:48,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:48,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 28586 backedges. 537 proven. 3703 refuted. 0 times theorem prover too weak. 24346 trivial. 0 not checked. [2020-07-21 19:30:48,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552354588] [2020-07-21 19:30:48,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:48,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 19:30:48,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615697975] [2020-07-21 19:30:48,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:30:48,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:48,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:30:48,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:30:48,664 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 21 states. [2020-07-21 19:30:49,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:49,242 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-21 19:30:49,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:30:49,243 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 697 [2020-07-21 19:30:49,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:49,248 INFO L225 Difference]: With dead ends: 97 [2020-07-21 19:30:49,248 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 19:30:49,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1401 GetRequests, 1358 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:30:49,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 19:30:49,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-21 19:30:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 19:30:49,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 19:30:49,271 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 697 [2020-07-21 19:30:49,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:49,272 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 19:30:49,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:30:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 19:30:49,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1951 [2020-07-21 19:30:49,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:49,312 INFO L422 BasicCegarLoop]: trace histogram [299, 299, 150, 149, 149, 149, 149, 149, 149, 149, 149, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:49,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:49,526 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:49,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:49,527 INFO L82 PathProgramCache]: Analyzing trace with hash 395569872, now seen corresponding path program 8 times [2020-07-21 19:30:49,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:49,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591087216] [2020-07-21 19:30:49,529 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 19:30:50,256 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:50,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:50,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 4351 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:30:50,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 233334 backedges. 1911 proven. 11715 refuted. 0 times theorem prover too weak. 219708 trivial. 0 not checked. [2020-07-21 19:30:51,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:57,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:00,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:01,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:02,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:02,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:02,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:02,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:03,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:03,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:03,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:03,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:03,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 233334 backedges. 1911 proven. 11807 refuted. 0 times theorem prover too weak. 219616 trivial. 0 not checked. [2020-07-21 19:31:04,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591087216] [2020-07-21 19:31:04,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:04,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 19:31:04,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595985365] [2020-07-21 19:31:04,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 19:31:04,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:04,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 19:31:04,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:31:04,564 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 23 states. [2020-07-21 19:31:04,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:04,980 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-21 19:31:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:31:04,981 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1950 [2020-07-21 19:31:04,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:04,988 INFO L225 Difference]: With dead ends: 102 [2020-07-21 19:31:04,988 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 19:31:04,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3909 GetRequests, 3861 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:31:04,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 19:31:05,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-21 19:31:05,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 19:31:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 19:31:05,003 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1950 [2020-07-21 19:31:05,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:05,006 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 19:31:05,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 19:31:05,006 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 19:31:05,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1354 [2020-07-21 19:31:05,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:05,023 INFO L422 BasicCegarLoop]: trace histogram [197, 197, 164, 98, 98, 98, 98, 98, 98, 98, 66, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:05,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:05,237 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:05,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:05,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1956381947, now seen corresponding path program 8 times [2020-07-21 19:31:05,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:05,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12892804] [2020-07-21 19:31:05,239 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 19:31:05,822 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:05,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:05,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 3004 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:31:05,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 109602 backedges. 1201 proven. 8306 refuted. 0 times theorem prover too weak. 100095 trivial. 0 not checked. [2020-07-21 19:31:06,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:11,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:13,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:13,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:14,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:14,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:14,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:15,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:15,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:15,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:15,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:15,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 109602 backedges. 1201 proven. 8406 refuted. 0 times theorem prover too weak. 99995 trivial. 0 not checked. [2020-07-21 19:31:15,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12892804] [2020-07-21 19:31:15,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:15,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 19:31:15,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369046869] [2020-07-21 19:31:15,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 19:31:15,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:15,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 19:31:15,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:31:15,967 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 23 states. [2020-07-21 19:31:16,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:16,546 INFO L93 Difference]: Finished difference Result 107 states and 432 transitions. [2020-07-21 19:31:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:31:16,547 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1353 [2020-07-21 19:31:16,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:16,552 INFO L225 Difference]: With dead ends: 107 [2020-07-21 19:31:16,553 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 19:31:16,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2714 GetRequests, 2666 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:31:16,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 19:31:16,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2020-07-21 19:31:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 19:31:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 19:31:16,568 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1353 [2020-07-21 19:31:16,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:16,570 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 19:31:16,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 19:31:16,570 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 19:31:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2731 [2020-07-21 19:31:16,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:16,628 INFO L422 BasicCegarLoop]: trace histogram [419, 419, 210, 209, 209, 209, 209, 209, 209, 209, 209, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:16,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:16,830 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:16,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:16,831 INFO L82 PathProgramCache]: Analyzing trace with hash 221762484, now seen corresponding path program 9 times [2020-07-21 19:31:16,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:16,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721603805] [2020-07-21 19:31:16,832 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 19:31:17,833 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:17,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:17,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 6091 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 19:31:17,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 458964 backedges. 2784 proven. 18684 refuted. 0 times theorem prover too weak. 437496 trivial. 0 not checked. [2020-07-21 19:31:21,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:29,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:34,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:37,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:38,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:38,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:38,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:38,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:39,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:39,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:39,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:39,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:39,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 458964 backedges. 2784 proven. 18801 refuted. 0 times theorem prover too weak. 437379 trivial. 0 not checked. [2020-07-21 19:31:42,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721603805] [2020-07-21 19:31:42,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:42,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-21 19:31:42,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175524886] [2020-07-21 19:31:42,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 19:31:42,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:42,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 19:31:42,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:31:42,069 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 25 states. [2020-07-21 19:31:43,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:43,046 INFO L93 Difference]: Finished difference Result 112 states and 474 transitions. [2020-07-21 19:31:43,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:31:43,047 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 2730 [2020-07-21 19:31:43,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:43,055 INFO L225 Difference]: With dead ends: 112 [2020-07-21 19:31:43,055 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 19:31:43,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5470 GetRequests, 5417 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 19:31:43,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 19:31:43,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-07-21 19:31:43,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 19:31:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-21 19:31:43,073 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 2730 [2020-07-21 19:31:43,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:43,076 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-21 19:31:43,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 19:31:43,076 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-21 19:31:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2865 [2020-07-21 19:31:43,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:43,131 INFO L422 BasicCegarLoop]: trace histogram [419, 419, 343, 209, 209, 209, 209, 209, 209, 209, 134, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:43,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:43,332 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:43,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:43,334 INFO L82 PathProgramCache]: Analyzing trace with hash 565204626, now seen corresponding path program 9 times [2020-07-21 19:31:43,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:43,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188482345] [2020-07-21 19:31:43,335 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 19:31:44,429 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:44,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:44,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 6359 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 19:31:44,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 495881 backedges. 2784 proven. 20214 refuted. 0 times theorem prover too weak. 472883 trivial. 0 not checked. [2020-07-21 19:31:47,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:55,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:01,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:03,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:03,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:04,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:05,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:05,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:06,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:06,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:06,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:06,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:06,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 495881 backedges. 2784 proven. 20340 refuted. 0 times theorem prover too weak. 472757 trivial. 0 not checked. [2020-07-21 19:32:08,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188482345] [2020-07-21 19:32:08,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:32:08,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-21 19:32:08,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873929922] [2020-07-21 19:32:08,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 19:32:08,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:32:08,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 19:32:08,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:32:08,887 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 25 states. [2020-07-21 19:32:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:32:09,936 INFO L93 Difference]: Finished difference Result 117 states and 518 transitions. [2020-07-21 19:32:09,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:32:09,937 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 2864 [2020-07-21 19:32:09,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:32:09,945 INFO L225 Difference]: With dead ends: 117 [2020-07-21 19:32:09,945 INFO L226 Difference]: Without dead ends: 113 [2020-07-21 19:32:09,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5737 GetRequests, 5684 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 19:32:09,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-21 19:32:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-07-21 19:32:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 19:32:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-21 19:32:09,966 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 2864 [2020-07-21 19:32:09,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:32:09,969 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-21 19:32:09,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 19:32:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-21 19:32:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3979 [2020-07-21 19:32:10,112 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:32:10,114 INFO L422 BasicCegarLoop]: trace histogram [611, 611, 306, 305, 305, 305, 305, 305, 305, 305, 305, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:32:10,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:10,328 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:32:10,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:32:10,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1096565120, now seen corresponding path program 10 times [2020-07-21 19:32:10,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:32:10,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600747730] [2020-07-21 19:32:10,332 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 19:32:11,900 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:32:11,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:32:11,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 8875 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 19:32:11,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:32:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 977220 backedges. 4000 proven. 30795 refuted. 0 times theorem prover too weak. 942425 trivial. 0 not checked. [2020-07-21 19:32:17,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:32:33,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:33,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:40,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:43,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:45,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:47,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:47,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:47,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:48,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:48,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:48,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:48,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 977220 backedges. 4000 proven. 30940 refuted. 0 times theorem prover too weak. 942280 trivial. 0 not checked. [2020-07-21 19:32:53,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600747730] [2020-07-21 19:32:53,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:32:53,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-21 19:32:53,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221061505] [2020-07-21 19:32:53,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 19:32:53,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:32:53,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 19:32:53,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-21 19:32:53,440 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 27 states. [2020-07-21 19:32:54,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:32:54,672 INFO L93 Difference]: Finished difference Result 122 states and 564 transitions. [2020-07-21 19:32:54,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 19:32:54,673 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 3978 [2020-07-21 19:32:54,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:32:54,680 INFO L225 Difference]: With dead ends: 122 [2020-07-21 19:32:54,680 INFO L226 Difference]: Without dead ends: 118 [2020-07-21 19:32:54,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7967 GetRequests, 7909 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 19:32:54,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-21 19:32:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 71. [2020-07-21 19:32:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 19:32:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 205 transitions. [2020-07-21 19:32:54,702 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 205 transitions. Word has length 3978 [2020-07-21 19:32:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:32:54,705 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 205 transitions. [2020-07-21 19:32:54,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 19:32:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 205 transitions. [2020-07-21 19:32:54,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5131 [2020-07-21 19:32:54,851 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:32:54,852 INFO L422 BasicCegarLoop]: trace histogram [755, 755, 593, 377, 377, 377, 377, 377, 377, 377, 216, 162, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:32:55,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:55,053 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:32:55,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:32:55,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1930612962, now seen corresponding path program 10 times [2020-07-21 19:32:55,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:32:55,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608686369] [2020-07-21 19:32:55,057 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 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 19:32:56,965 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:32:56,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:32:56,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 11395 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 19:32:57,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:33:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1597572 backedges. 5277 proven. 40602 refuted. 0 times theorem prover too weak. 1551693 trivial. 0 not checked. [2020-07-21 19:33:05,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:33:23,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:35,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:35,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:41,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:41,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:43,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:43,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:45,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:45,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:46,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:46,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:47,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:47,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:47,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:47,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:47,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:47,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1597572 backedges. 5277 proven. 40757 refuted. 0 times theorem prover too weak. 1551538 trivial. 0 not checked. [2020-07-21 19:33:56,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608686369] [2020-07-21 19:33:56,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:33:56,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-21 19:33:56,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442402721] [2020-07-21 19:33:56,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 19:33:56,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:33:56,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 19:33:56,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-21 19:33:56,212 INFO L87 Difference]: Start difference. First operand 71 states and 205 transitions. Second operand 27 states. [2020-07-21 19:33:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:33:58,209 INFO L93 Difference]: Finished difference Result 127 states and 612 transitions. [2020-07-21 19:33:58,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 19:33:58,216 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 5130 [2020-07-21 19:33:58,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:33:58,226 INFO L225 Difference]: With dead ends: 127 [2020-07-21 19:33:58,226 INFO L226 Difference]: Without dead ends: 123 [2020-07-21 19:33:58,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10270 GetRequests, 10212 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 19:33:58,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-21 19:33:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2020-07-21 19:33:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 19:33:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 205 transitions. [2020-07-21 19:33:58,264 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 205 transitions. Word has length 5130 [2020-07-21 19:33:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:33:58,268 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 205 transitions. [2020-07-21 19:33:58,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 19:33:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 205 transitions. [2020-07-21 19:33:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5461 [2020-07-21 19:33:58,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:33:58,464 INFO L422 BasicCegarLoop]: trace histogram [839, 839, 420, 419, 419, 419, 419, 419, 419, 419, 419, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:33:58,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:33:58,666 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:33:58,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:33:58,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1050665484, now seen corresponding path program 11 times [2020-07-21 19:33:58,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:33:58,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296533102] [2020-07-21 19:33:58,669 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 19:34:00,854 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:34:00,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:34:00,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 12181 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 19:34:00,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:34:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1844019 backedges. 6015 proven. 46494 refuted. 0 times theorem prover too weak. 1791510 trivial. 0 not checked. [2020-07-21 19:34:11,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:34:18,356 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 19:34:36,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:48,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:57,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:57,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:03,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:03,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:06,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:07,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:07,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:08,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:08,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:08,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:09,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:09,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:09,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:09,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1844019 backedges. 6015 proven. 46670 refuted. 0 times theorem prover too weak. 1791334 trivial. 0 not checked. [2020-07-21 19:35:18,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296533102] [2020-07-21 19:35:18,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:35:18,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-21 19:35:18,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671876919] [2020-07-21 19:35:18,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 19:35:18,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:35:18,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 19:35:18,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:35:18,683 INFO L87 Difference]: Start difference. First operand 71 states and 205 transitions. Second operand 29 states. [2020-07-21 19:35:20,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:35:20,724 INFO L93 Difference]: Finished difference Result 132 states and 662 transitions. [2020-07-21 19:35:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 19:35:20,726 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 5460 [2020-07-21 19:35:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:35:20,735 INFO L225 Difference]: With dead ends: 132 [2020-07-21 19:35:20,735 INFO L226 Difference]: Without dead ends: 128 [2020-07-21 19:35:20,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10932 GetRequests, 10869 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 19:35:20,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-21 19:35:20,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 76. [2020-07-21 19:35:20,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 19:35:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 234 transitions. [2020-07-21 19:35:20,764 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 234 transitions. Word has length 5460 [2020-07-21 19:35:20,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:35:20,768 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 234 transitions. [2020-07-21 19:35:20,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 19:35:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 234 transitions. [2020-07-21 19:35:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12541 [2020-07-21 19:35:21,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:35:21,909 INFO L422 BasicCegarLoop]: trace histogram [1827, 1827, 1571, 913, 913, 913, 913, 913, 913, 913, 658, 256, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:35:22,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:35:22,110 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:35:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:35:22,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1359252116, now seen corresponding path program 11 times [2020-07-21 19:35:22,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:35:22,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262187410] [2020-07-21 19:35:22,116 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 19:35:26,880 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:35:26,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:35:27,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 27823 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 19:35:27,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:36:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9570751 backedges. 12048 proven. 111985 refuted. 0 times theorem prover too weak. 9446718 trivial. 0 not checked. [2020-07-21 19:36:23,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:36:27,906 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 19:36:29,741 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 19:36:33,188 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:36:40,704 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:36:40,826 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:36:40,954 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 19:36:41,082 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 19:36:41,209 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 19:36:41,328 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 19:36:41,445 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 19:36:41,565 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 19:36:41,671 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:36:41,776 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 19:38:02,057 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 19:38:02,159 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 19:38:02,291 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:38:02,407 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:38:05,706 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:38:05,829 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:38:05,960 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:38:06,088 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:38:06,215 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 19:38:06,344 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 19:38:06,470 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:38:06,587 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:38:06,698 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:38:06,801 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 19:38:07,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:07,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:21,639 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 19:38:32,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:43,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:43,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:54,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:54,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:00,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:00,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:05,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:05,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:08,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:10,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:10,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:10,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:11,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:11,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:11,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9570751 backedges. 12048 proven. 112172 refuted. 0 times theorem prover too weak. 9446531 trivial. 0 not checked. [2020-07-21 19:40:08,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262187410] [2020-07-21 19:40:08,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:40:08,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-21 19:40:08,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792040470] [2020-07-21 19:40:08,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 19:40:08,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:40:08,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 19:40:08,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:40:08,765 INFO L87 Difference]: Start difference. First operand 76 states and 234 transitions. Second operand 29 states. [2020-07-21 19:40:10,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:40:10,719 INFO L93 Difference]: Finished difference Result 137 states and 714 transitions. [2020-07-21 19:40:10,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 19:40:10,723 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 12540 [2020-07-21 19:40:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:40:10,741 INFO L225 Difference]: With dead ends: 137 [2020-07-21 19:40:10,741 INFO L226 Difference]: Without dead ends: 133 [2020-07-21 19:40:10,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25091 GetRequests, 25028 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 19:40:10,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-21 19:40:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 76. [2020-07-21 19:40:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 19:40:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 234 transitions. [2020-07-21 19:40:10,783 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 234 transitions. Word has length 12540 [2020-07-21 19:40:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:40:10,792 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 234 transitions. [2020-07-21 19:40:10,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 19:40:10,793 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 234 transitions. [2020-07-21 19:40:13,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17551 [2020-07-21 19:40:13,396 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:40:13,402 INFO L422 BasicCegarLoop]: trace histogram [2699, 2699, 1350, 1349, 1349, 1349, 1349, 1349, 1349, 1349, 1349, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:40:13,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:13,603 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:40:13,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:40:13,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1047465342, now seen corresponding path program 12 times [2020-07-21 19:40:13,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:40:13,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129525320] [2020-07-21 19:40:13,610 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 19:40:21,049 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:40:21,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:40:21,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 39151 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 19:40:21,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 19109934 backedges. 17943 proven. 167385 refuted. 0 times theorem prover too weak. 18924606 trivial. 0 not checked. [2020-07-21 19:42:20,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:42:24,435 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:42:24,545 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:42:24,663 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 19:42:24,783 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 19:42:26,002 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 19:42:26,174 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 19:42:26,300 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:42:26,430 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:42:29,868 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 19:42:30,001 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 19:42:30,139 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:42:30,287 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:42:33,630 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:42:33,787 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:42:33,949 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:42:34,108 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:42:40,704 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:42:40,874 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:42:41,058 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:42:41,240 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:42:57,592 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:42:57,755 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:42:58,004 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:42:58,184 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:42:58,348 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 19:42:58,509 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 19:42:58,661 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 19:42:58,804 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 19:42:58,940 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 19:42:59,073 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 19:42:59,193 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:42:59,312 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:42:59,420 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:42:59,524 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 61