/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:03:15,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:03:15,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:03:15,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:03:15,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:03:15,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:03:15,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:03:15,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:03:15,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:03:15,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:03:15,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:03:15,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:03:15,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:03:15,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:03:15,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:03:15,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:03:15,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:03:15,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:03:15,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:03:15,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:03:15,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:03:15,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:03:15,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:03:15,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:03:15,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:03:15,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:03:15,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:03:15,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:03:15,410 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 22:03:15,430 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:03:15,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:03:15,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:03:15,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:03:15,432 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:03:15,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:03:15,433 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:03:15,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:03:15,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:03:15,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:03:15,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:03:15,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:03:15,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:03:15,435 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:03:15,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:03:15,436 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:03:15,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:03:15,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:03:15,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:03:15,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:03:15,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:03:15,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:03:15,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:03:15,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:03:15,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:03:15,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:03:15,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:15,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:03:15,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:03:15,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:03:15,742 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:03:15,754 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:03:15,758 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:03:15,759 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:03:15,759 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:03:15,760 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-21 22:03:15,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3011f8a6f/0a75a2b696244b62bbed553709171a66/FLAGe8987a6d9 [2020-07-21 22:03:16,253 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:03:16,254 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-21 22:03:16,260 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3011f8a6f/0a75a2b696244b62bbed553709171a66/FLAGe8987a6d9 [2020-07-21 22:03:16,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3011f8a6f/0a75a2b696244b62bbed553709171a66 [2020-07-21 22:03:16,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:03:16,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:03:16,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:03:16,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:03:16,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:03:16,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:03:16" (1/1) ... [2020-07-21 22:03:16,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@320c5c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:16, skipping insertion in model container [2020-07-21 22:03:16,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:03:16" (1/1) ... [2020-07-21 22:03:16,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:03:16,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:03:16,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:03:16,873 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:03:16,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:03:16,905 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:03:16,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:16 WrapperNode [2020-07-21 22:03:16,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:03:16,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:03:16,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:03:16,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:03:16,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:16" (1/1) ... [2020-07-21 22:03:16,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:16" (1/1) ... [2020-07-21 22:03:16,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:16" (1/1) ... [2020-07-21 22:03:16,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:16" (1/1) ... [2020-07-21 22:03:16,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:16" (1/1) ... [2020-07-21 22:03:16,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:16" (1/1) ... [2020-07-21 22:03:16,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:16" (1/1) ... [2020-07-21 22:03:16,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:03:16,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:03:16,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:03:16,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:03:16,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:16" (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 22:03:17,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:03:17,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:03:17,079 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-07-21 22:03:17,079 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:03:17,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:03:17,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:03:17,080 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-07-21 22:03:17,080 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:03:17,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:03:17,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:03:17,311 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:03:17,312 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:03:17,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:03:17 BoogieIcfgContainer [2020-07-21 22:03:17,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:03:17,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:03:17,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:03:17,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:03:17,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:03:16" (1/3) ... [2020-07-21 22:03:17,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ca6c40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:03:17, skipping insertion in model container [2020-07-21 22:03:17,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:16" (2/3) ... [2020-07-21 22:03:17,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ca6c40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:03:17, skipping insertion in model container [2020-07-21 22:03:17,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:03:17" (3/3) ... [2020-07-21 22:03:17,333 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-07-21 22:03:17,344 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:03:17,367 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:03:17,377 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:03:17,399 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:03:17,399 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:03:17,399 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:03:17,400 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:03:17,400 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:03:17,400 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:03:17,400 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:03:17,400 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:03:17,418 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 22:03:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 22:03:17,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:17,426 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:17,426 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:17,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:17,432 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-07-21 22:03:17,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:17,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317514136] [2020-07-21 22:03:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:17,524 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:03:17,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:17,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:03:17,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:03:17,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:03:17,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317514136] [2020-07-21 22:03:17,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:17,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-21 22:03:17,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849545333] [2020-07-21 22:03:17,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 22:03:17,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:17,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 22:03:17,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:03:17,728 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-07-21 22:03:17,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:17,891 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-07-21 22:03:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:03:17,893 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-21 22:03:17,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:17,908 INFO L225 Difference]: With dead ends: 41 [2020-07-21 22:03:17,908 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 22:03:17,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 22:03:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 22:03:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 22:03:17,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 22:03:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-21 22:03:17,996 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-07-21 22:03:17,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:17,997 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-21 22:03:17,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 22:03:17,997 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-21 22:03:18,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 22:03:18,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:18,001 INFO L422 BasicCegarLoop]: trace histogram [3, 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 22:03:18,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:18,204 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:18,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:18,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-07-21 22:03:18,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:18,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993200518] [2020-07-21 22:03:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:18,251 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:03:18,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:18,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:03:18,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 22:03:18,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:03:18,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993200518] [2020-07-21 22:03:18,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:03:18,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:03:18,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15860322] [2020-07-21 22:03:18,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:03:18,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:18,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:03:18,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:03:18,298 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-07-21 22:03:18,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:18,362 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-21 22:03:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:03:18,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-07-21 22:03:18,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:18,365 INFO L225 Difference]: With dead ends: 29 [2020-07-21 22:03:18,365 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 22:03:18,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 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 22:03:18,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 22:03:18,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 22:03:18,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 22:03:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-07-21 22:03:18,374 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-07-21 22:03:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:18,375 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-07-21 22:03:18,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:03:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-07-21 22:03:18,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 22:03:18,377 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:18,377 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:18,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:18,591 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:18,592 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-07-21 22:03:18,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:18,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423061794] [2020-07-21 22:03:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:18,637 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:03:18,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:18,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-21 22:03:18,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 22:03:18,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:19,157 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:03:19,314 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:03:19,316 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:03:19,318 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:03:19,716 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 22:03:19,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:19,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:19,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:19,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:19,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:19,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:19,728 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:03:19,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:19,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:19,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:19,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:19,735 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:03:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 22:03:19,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423061794] [2020-07-21 22:03:19,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:19,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2020-07-21 22:03:19,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527468298] [2020-07-21 22:03:19,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 22:03:19,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:19,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 22:03:19,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:03:19,783 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 30 states. [2020-07-21 22:03:20,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:20,543 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-07-21 22:03:20,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:03:20,544 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2020-07-21 22:03:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:20,546 INFO L225 Difference]: With dead ends: 43 [2020-07-21 22:03:20,546 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 22:03:20,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2020-07-21 22:03:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 22:03:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-07-21 22:03:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 22:03:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-07-21 22:03:20,560 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-07-21 22:03:20,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:20,561 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-07-21 22:03:20,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 22:03:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-07-21 22:03:20,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-21 22:03:20,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:20,563 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:20,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:20,779 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:20,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-07-21 22:03:20,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:20,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58697706] [2020-07-21 22:03:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:20,817 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:03:20,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:20,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:03:20,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-21 22:03:20,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:03:20,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58697706] [2020-07-21 22:03:20,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:03:20,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:03:20,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228309295] [2020-07-21 22:03:20,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:03:20,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:20,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:03:20,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:03:20,848 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 5 states. [2020-07-21 22:03:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:20,921 INFO L93 Difference]: Finished difference Result 57 states and 85 transitions. [2020-07-21 22:03:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:03:20,922 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-07-21 22:03:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:20,924 INFO L225 Difference]: With dead ends: 57 [2020-07-21 22:03:20,924 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 22:03:20,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 22:03:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 22:03:20,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-21 22:03:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:03:20,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2020-07-21 22:03:20,943 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2020-07-21 22:03:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:20,944 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2020-07-21 22:03:20,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:03:20,944 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2020-07-21 22:03:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-21 22:03:20,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:20,946 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:21,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:21,161 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:21,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:21,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-07-21 22:03:21,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:21,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724609028] [2020-07-21 22:03:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:21,201 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:03:21,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:21,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-21 22:03:21,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 22:03:21,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:21,740 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:03:21,952 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:03:21,952 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:03:21,953 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:03:21,955 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:03:21,956 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 22:03:22,119 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:03:22,121 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:03:22,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:22,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:22,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:22,555 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:03:22,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:22,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:22,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:22,561 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:03:22,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:22,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:22,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:22,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:22,568 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:03:22,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:22,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:22,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:22,574 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:03:22,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:22,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:22,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:22,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:22,581 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:03:22,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:22,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:22,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:22,587 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:03:22,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:22,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:22,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:24,645 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or (forall ((v_mult_~n_BEFORE_CALL_10 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_10 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3)) .cse0) .cse0 (forall ((v_mult_~n_BEFORE_CALL_10 Int)) (let ((.cse1 (* v_mult_~n_BEFORE_CALL_10 (- 1)))) (let ((.cse2 (div .cse1 (- 2)))) (or (<= 3 (div (+ .cse1 (- 1)) (- 2))) (< .cse2 1) (< .cse2 (+ (div (+ .cse1 (* |c_mult_#res| (- 1))) (- 2)) 1)))))) (forall ((v_mult_~n_BEFORE_CALL_10 Int)) (let ((.cse3 (* v_mult_~n_BEFORE_CALL_10 (- 1)))) (or (<= 3 (div (+ .cse3 (- 1)) (- 2))) (< (div .cse3 (- 2)) 1) (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3)))))) is different from false [2020-07-21 22:03:26,684 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or (forall ((v_mult_~n_BEFORE_CALL_10 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_10 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3)) .cse0) (forall ((v_prenex_3 Int)) (let ((.cse2 (* v_prenex_3 (- 1)))) (let ((.cse1 (div .cse2 (- 2)))) (or (< .cse1 (+ (div (+ .cse2 (* |c_mult_#res| (- 1))) (- 2)) 1)) (<= 3 (div (+ .cse2 (- 1)) (- 2))) (< .cse1 1))))) .cse0 (forall ((v_prenex_4 Int)) (let ((.cse3 (* v_prenex_4 (- 1)))) (or (<= 3 (div (+ .cse3 (- 1)) (- 2))) (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3) (< (div .cse3 (- 2)) 1)))))) is different from false [2020-07-21 22:03:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 8 not checked. [2020-07-21 22:03:26,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724609028] [2020-07-21 22:03:26,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:26,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 37 [2020-07-21 22:03:26,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586184423] [2020-07-21 22:03:26,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-21 22:03:26,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:26,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-21 22:03:26,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1070, Unknown=2, NotChecked=134, Total=1332 [2020-07-21 22:03:26,781 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 37 states. [2020-07-21 22:04:17,709 WARN L193 SmtUtils]: Spent 50.56 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-07-21 22:04:20,751 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-07-21 22:04:21,884 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:04:22,546 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:04:23,005 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:04:23,957 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:04:27,208 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:04:27,696 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:04:28,910 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2020-07-21 22:04:29,268 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:04:30,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:04:30,103 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2020-07-21 22:04:30,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 22:04:30,103 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2020-07-21 22:04:30,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:04:30,105 INFO L225 Difference]: With dead ends: 67 [2020-07-21 22:04:30,105 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 22:04:30,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 60.6s TimeCoverageRelationStatistics Valid=335, Invalid=2323, Unknown=2, NotChecked=202, Total=2862 [2020-07-21 22:04:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 22:04:30,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2020-07-21 22:04:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 22:04:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 70 transitions. [2020-07-21 22:04:30,119 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 70 transitions. Word has length 44 [2020-07-21 22:04:30,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:04:30,120 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 70 transitions. [2020-07-21 22:04:30,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-21 22:04:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 70 transitions. [2020-07-21 22:04:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 22:04:30,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:04:30,126 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:04:30,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:30,343 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:04:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:04:30,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1493646056, now seen corresponding path program 2 times [2020-07-21 22:04:30,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:04:30,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667704397] [2020-07-21 22:04:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:30,394 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:04:30,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:04:30,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 22:04:30,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:04:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-07-21 22:04:30,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:04:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-07-21 22:04:31,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667704397] [2020-07-21 22:04:31,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:04:31,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-21 22:04:31,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336687130] [2020-07-21 22:04:31,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 22:04:31,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:04:31,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 22:04:31,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 22:04:31,272 INFO L87 Difference]: Start difference. First operand 47 states and 70 transitions. Second operand 7 states. [2020-07-21 22:04:31,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:04:31,553 INFO L93 Difference]: Finished difference Result 72 states and 113 transitions. [2020-07-21 22:04:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:04:31,563 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-07-21 22:04:31,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:04:31,565 INFO L225 Difference]: With dead ends: 72 [2020-07-21 22:04:31,565 INFO L226 Difference]: Without dead ends: 40 [2020-07-21 22:04:31,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 105 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:04:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-21 22:04:31,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-21 22:04:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:04:31,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2020-07-21 22:04:31,576 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 57 [2020-07-21 22:04:31,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:04:31,576 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2020-07-21 22:04:31,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 22:04:31,577 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2020-07-21 22:04:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-21 22:04:31,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:04:31,578 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:04:31,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:31,794 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:04:31,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:04:31,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1146349017, now seen corresponding path program 4 times [2020-07-21 22:04:31,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:04:31,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774510291] [2020-07-21 22:04:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:31,830 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:04:31,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:04:31,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 61 conjunts are in the unsatisfiable core [2020-07-21 22:04:31,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:04:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-21 22:04:32,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:04:33,722 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:04:34,236 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:04:34,237 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:04:35,320 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:04:36,713 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-21 22:04:36,714 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:04:36,928 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:04:36,929 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:04:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 22:04:36,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774510291] [2020-07-21 22:04:36,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:04:36,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2020-07-21 22:04:36,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499062896] [2020-07-21 22:04:36,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 22:04:36,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:04:36,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 22:04:36,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:04:36,991 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand 25 states. [2020-07-21 22:04:38,026 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:04:39,504 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:04:40,348 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-21 22:04:40,953 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2020-07-21 22:04:41,356 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-21 22:04:41,976 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2020-07-21 22:04:42,620 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:04:42,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:04:42,876 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-07-21 22:04:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 22:04:42,884 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2020-07-21 22:04:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:04:42,885 INFO L225 Difference]: With dead ends: 61 [2020-07-21 22:04:42,885 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 22:04:42,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2020-07-21 22:04:42,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 22:04:42,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-07-21 22:04:42,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 22:04:42,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2020-07-21 22:04:42,894 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 44 [2020-07-21 22:04:42,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:04:42,895 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2020-07-21 22:04:42,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 22:04:42,895 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2020-07-21 22:04:42,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-21 22:04:42,896 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:04:42,896 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:04:43,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:43,110 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:04:43,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:04:43,111 INFO L82 PathProgramCache]: Analyzing trace with hash 430867302, now seen corresponding path program 5 times [2020-07-21 22:04:43,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:04:43,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143716435] [2020-07-21 22:04:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:43,151 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:04:43,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:04:43,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 69 conjunts are in the unsatisfiable core [2020-07-21 22:04:43,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:04:44,958 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-21 22:04:44,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:04:45,804 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:04:46,113 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:04:46,511 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:04:46,767 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-21 22:04:47,999 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:04:48,000 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:04:48,001 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:04:49,202 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:04:49,202 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:04:49,203 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:04:49,204 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 22:04:50,136 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:04:50,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:50,138 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:04:50,139 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:04:51,824 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:04:52,158 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:04:52,687 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 22:04:52,692 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:04:52,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:04:52,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:04:52,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,707 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:04:52,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:04:52,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:04:52,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,718 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:04:52,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:04:52,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:04:52,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:52,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:54,846 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (< |c_mult_#in~m| 1))) (and (forall ((v_mult_~n_BEFORE_CALL_24 Int)) (let ((.cse1 (* v_mult_~n_BEFORE_CALL_24 (- 1)))) (let ((.cse0 (div .cse1 (- 3)))) (or (< .cse0 (+ (div (+ .cse1 (* |c_mult_#res| (- 1))) (- 3)) 1)) (<= 3 (div (+ .cse1 (- 1)) (- 3))) (< .cse0 1))))) (forall ((v_mult_~n_BEFORE_CALL_24 Int)) (let ((.cse2 (* v_mult_~n_BEFORE_CALL_24 (- 1)))) (or (<= 3 (div (+ .cse2 (- 1)) (- 3))) (< (div .cse2 (- 3)) 1) (< (div (+ .cse2 (* |c_mult_#res| (- 1)) (- 1)) (- 3)) 3)))) .cse3 (or .cse3 (forall ((v_mult_~n_BEFORE_CALL_24 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_24 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 3)) 3))))) is different from false [2020-07-21 22:04:56,871 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (< |c_mult_#in~m| 1))) (and (forall ((v_mult_~n_BEFORE_CALL_24 Int)) (let ((.cse1 (* v_mult_~n_BEFORE_CALL_24 (- 1)))) (let ((.cse0 (div .cse1 (- 3)))) (or (< .cse0 (+ (div (+ .cse1 (* |c_mult_#res| (- 1))) (- 3)) 1)) (<= 3 (div (+ .cse1 (- 1)) (- 3))) (< .cse0 1))))) (forall ((v_prenex_9 Int)) (let ((.cse2 (* v_prenex_9 (- 1)))) (or (< (div (+ (* |c_mult_#res| (- 1)) .cse2 (- 1)) (- 3)) 3) (<= 3 (div (+ .cse2 (- 1)) (- 3))) (< (div .cse2 (- 3)) 1)))) (or (forall ((v_prenex_10 Int)) (< (div (+ (* v_prenex_10 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 3)) 3)) .cse3) .cse3)) is different from false [2020-07-21 22:04:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 10 not checked. [2020-07-21 22:04:57,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143716435] [2020-07-21 22:04:57,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:04:57,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2020-07-21 22:04:57,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509459065] [2020-07-21 22:04:57,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-21 22:04:57,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:04:57,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-21 22:04:57,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1426, Unknown=2, NotChecked=154, Total=1722 [2020-07-21 22:04:57,185 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand 42 states. [2020-07-21 22:05:00,152 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 51 DAG size of output: 13 [2020-07-21 22:05:00,821 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-21 22:05:01,138 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:05:01,473 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:05:01,950 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:05:02,875 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:05:03,220 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:05:03,813 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 22:05:04,148 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:05:04,579 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:05:05,700 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:05:06,552 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 22:05:06,983 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:05:07,878 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:05:08,603 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 22:05:09,203 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2020-07-21 22:05:09,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:09,996 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2020-07-21 22:05:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 22:05:10,004 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 51 [2020-07-21 22:05:10,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:10,007 INFO L225 Difference]: With dead ends: 71 [2020-07-21 22:05:10,007 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 22:05:10,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=418, Invalid=3010, Unknown=2, NotChecked=230, Total=3660 [2020-07-21 22:05:10,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 22:05:10,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2020-07-21 22:05:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 22:05:10,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2020-07-21 22:05:10,018 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 51 [2020-07-21 22:05:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:10,018 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2020-07-21 22:05:10,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-21 22:05:10,019 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2020-07-21 22:05:10,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 22:05:10,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:10,020 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:10,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:10,234 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:10,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:10,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1255254341, now seen corresponding path program 6 times [2020-07-21 22:05:10,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:10,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122505537] [2020-07-21 22:05:10,236 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:10,298 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:05:10,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:10,301 WARN L261 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 85 conjunts are in the unsatisfiable core [2020-07-21 22:05:10,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 62 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-07-21 22:05:11,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:12,604 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:05:12,994 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:13,991 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:13,992 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:13,993 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:13,993 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:14,667 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:14,669 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:05:16,084 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:05:16,448 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:05:17,850 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:05:18,381 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-21 22:05:18,382 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:19,444 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:05:22,090 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 22:05:22,095 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:22,096 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:22,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:05:22,572 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-21 22:05:23,643 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 22:05:23,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122505537] [2020-07-21 22:05:23,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:05:23,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-21 22:05:23,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441263929] [2020-07-21 22:05:23,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:05:23,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:23,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:05:23,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1077, Unknown=1, NotChecked=0, Total=1190 [2020-07-21 22:05:23,649 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand 16 states. [2020-07-21 22:05:24,269 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-21 22:05:24,717 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-21 22:05:25,016 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:05:25,323 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:05:25,738 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:05:26,194 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:05:26,612 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:05:27,648 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-21 22:05:28,215 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-21 22:05:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:28,219 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2020-07-21 22:05:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:05:28,219 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-07-21 22:05:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:28,220 INFO L225 Difference]: With dead ends: 57 [2020-07-21 22:05:28,221 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 22:05:28,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=247, Invalid=1732, Unknown=1, NotChecked=0, Total=1980 [2020-07-21 22:05:28,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 22:05:28,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-07-21 22:05:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 22:05:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2020-07-21 22:05:28,230 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 58 [2020-07-21 22:05:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:28,231 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2020-07-21 22:05:28,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:05:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2020-07-21 22:05:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 22:05:28,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:28,232 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:28,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:28,446 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:28,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:28,447 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 7 times [2020-07-21 22:05:28,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:28,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375212303] [2020-07-21 22:05:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:28,510 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:05:28,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:28,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 81 conjunts are in the unsatisfiable core [2020-07-21 22:05:28,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-21 22:05:31,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:31,997 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:05:32,350 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:05:32,702 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:05:33,204 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:05:33,518 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-21 22:05:34,144 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:05:34,504 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:05:34,881 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:05:35,459 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:05:35,464 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:35,465 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:05:35,465 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:05:35,466 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:05:35,467 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 22:05:36,455 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:05:36,818 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:05:37,451 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 22:05:37,455 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:37,456 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 22:05:37,457 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:37,457 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:39,012 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 22:05:39,016 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:39,017 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:39,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:05:39,019 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:05:40,296 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:05:40,301 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:40,302 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:05:40,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:40,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:40,303 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:05:42,484 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 22:05:42,979 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 22:05:43,655 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:05:43,660 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:05:43,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:05:43,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,667 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:05:43,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:05:43,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,674 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:05:43,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:05:43,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:43,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:45,725 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or (forall ((v_mult_~n_BEFORE_CALL_43 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_43 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 4)) 3)) .cse0) (forall ((v_mult_~n_BEFORE_CALL_43 Int)) (let ((.cse2 (* v_mult_~n_BEFORE_CALL_43 (- 1)))) (let ((.cse1 (div .cse2 (- 4)))) (or (< .cse1 1) (< .cse1 (+ (div (+ .cse2 (* |c_mult_#res| (- 1))) (- 4)) 1)) (<= 3 (div (+ .cse2 (- 1)) (- 4))))))) (forall ((v_mult_~n_BEFORE_CALL_43 Int)) (let ((.cse3 (* v_mult_~n_BEFORE_CALL_43 (- 1)))) (or (< (div .cse3 (- 4)) 1) (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 4)) 3) (<= 3 (div (+ .cse3 (- 1)) (- 4)))))) .cse0)) is different from false [2020-07-21 22:05:47,751 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or (forall ((v_mult_~n_BEFORE_CALL_43 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_43 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 4)) 3)) .cse0) .cse0 (forall ((v_prenex_15 Int)) (let ((.cse1 (* v_prenex_15 (- 1)))) (or (<= 3 (div (+ .cse1 (- 1)) (- 4))) (< (div (+ .cse1 (* |c_mult_#res| (- 1)) (- 1)) (- 4)) 3) (< (div .cse1 (- 4)) 1)))) (forall ((v_prenex_14 Int)) (let ((.cse3 (* v_prenex_14 (- 1)))) (let ((.cse2 (div .cse3 (- 4)))) (or (< .cse2 (+ (div (+ .cse3 (* |c_mult_#res| (- 1))) (- 4)) 1)) (< .cse2 1) (<= 3 (div (+ .cse3 (- 1)) (- 4))))))))) is different from false [2020-07-21 22:05:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 86 refuted. 0 times theorem prover too weak. 21 trivial. 12 not checked. [2020-07-21 22:05:48,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375212303] [2020-07-21 22:05:48,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:48,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27] total 47 [2020-07-21 22:05:48,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118250557] [2020-07-21 22:05:48,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-21 22:05:48,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:48,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-21 22:05:48,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1832, Unknown=2, NotChecked=174, Total=2162 [2020-07-21 22:05:48,170 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand 47 states. [2020-07-21 22:06:45,400 WARN L193 SmtUtils]: Spent 56.28 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-07-21 22:06:50,598 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-07-21 22:06:51,221 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:06:52,082 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:06:53,668 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:06:54,350 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:06:55,511 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:06:56,158 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:06:57,147 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:06:58,304 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:06:59,783 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:07:01,769 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 22:07:02,702 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:07:03,857 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 16 [2020-07-21 22:07:04,829 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:07:05,610 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:07:07,339 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:07:08,553 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:07:09,411 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:07:09,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:09,880 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2020-07-21 22:07:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-21 22:07:09,897 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 58 [2020-07-21 22:07:09,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:09,899 INFO L225 Difference]: With dead ends: 76 [2020-07-21 22:07:09,899 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 22:07:09,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 63 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 83.7s TimeCoverageRelationStatistics Valid=447, Invalid=3719, Unknown=2, NotChecked=254, Total=4422 [2020-07-21 22:07:09,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 22:07:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2020-07-21 22:07:09,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 22:07:09,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2020-07-21 22:07:09,910 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 58 [2020-07-21 22:07:09,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:09,911 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2020-07-21 22:07:09,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-21 22:07:09,911 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2020-07-21 22:07:09,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 22:07:09,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:09,912 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:07:10,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:10,129 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:10,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1602258660, now seen corresponding path program 8 times [2020-07-21 22:07:10,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:10,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877977477] [2020-07-21 22:07:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:10,179 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:07:10,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:10,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 93 conjunts are in the unsatisfiable core [2020-07-21 22:07:10,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 32 proven. 80 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-07-21 22:07:15,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:07:15,994 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:07:16,111 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:07:16,279 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:07:16,516 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:07:16,660 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:07:16,873 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:07:17,115 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:17,261 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:17,472 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:07:17,708 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:17,853 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:18,060 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:07:18,300 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:18,444 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:18,650 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:07:18,880 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:07:19,022 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:07:19,527 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:07:19,533 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:07:20,122 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-21 22:07:20,610 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:07:20,872 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:07:20,984 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:07:21,145 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:07:21,378 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:07:21,524 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:07:21,748 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:07:21,854 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:07:22,006 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:22,155 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:22,366 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:07:22,606 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:22,753 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:22,958 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:07:23,199 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:23,344 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:23,894 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:07:23,900 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:07:23,901 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:07:23,901 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:07:23,902 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:07:23,903 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 22:07:24,456 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:07:25,013 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:07:25,282 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:07:25,404 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:07:25,578 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:07:25,829 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:07:25,977 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:07:26,186 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:07:26,432 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:26,585 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:26,800 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:07:27,047 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:27,196 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:27,833 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 22:07:27,840 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:07:27,841 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:07:27,841 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:07:27,842 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 22:07:28,420 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:07:29,037 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:07:29,305 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:07:29,418 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:07:29,584 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:07:29,835 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:07:29,973 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:07:30,182 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:07:30,429 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:30,567 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:07:31,189 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 22:07:31,196 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:07:31,197 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 22:07:31,198 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:07:31,199 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:07:31,777 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:07:32,398 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:07:32,705 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:07:32,846 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:07:33,050 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:07:33,163 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:07:33,341 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:07:33,507 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:07:34,332 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 22:07:34,339 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:07:34,340 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 22:07:34,341 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:07:34,342 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:07:35,039 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:07:35,800 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:07:36,057 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:07:36,169 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:07:36,802 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:07:36,807 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:07:36,808 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:07:36,808 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:07:36,809 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:07:36,810 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:07:38,962 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 22:07:39,207 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 22:07:39,363 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 22:07:40,177 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 22:07:41,108 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 22:07:41,366 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:07:41,482 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:07:42,536 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:07:42,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:42,546 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:07:42,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:07:42,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:07:42,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:42,550 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:07:42,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:07:42,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:42,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:07:42,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:42,554 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:07:42,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:07:42,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:07:42,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:42,557 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:07:42,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:07:42,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:42,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:07:42,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:42,561 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:07:42,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:07:42,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:07:42,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:42,564 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:07:42,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:07:42,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:42,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:07:44,600 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or (forall ((v_mult_~n_BEFORE_CALL_55 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_55 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 5)) 3)) .cse0) .cse0 (forall ((v_mult_~n_BEFORE_CALL_55 Int)) (let ((.cse1 (* v_mult_~n_BEFORE_CALL_55 (- 1)))) (or (< (div .cse1 (- 5)) 1) (<= 3 (div (+ .cse1 (- 1)) (- 5))) (< (div (+ .cse1 (* |c_mult_#res| (- 1)) (- 1)) (- 5)) 3)))) (forall ((v_mult_~n_BEFORE_CALL_55 Int)) (let ((.cse3 (* v_mult_~n_BEFORE_CALL_55 (- 1)))) (let ((.cse2 (div .cse3 (- 5)))) (or (< .cse2 1) (<= 3 (div (+ .cse3 (- 1)) (- 5))) (< .cse2 (+ (div (+ .cse3 (* |c_mult_#res| (- 1))) (- 5)) 1)))))))) is different from false [2020-07-21 22:07:46,634 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or (forall ((v_mult_~n_BEFORE_CALL_55 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_55 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 5)) 3)) .cse0) .cse0 (forall ((v_prenex_17 Int)) (let ((.cse2 (* v_prenex_17 (- 1)))) (let ((.cse1 (div .cse2 (- 5)))) (or (< .cse1 (+ (div (+ .cse2 (* |c_mult_#res| (- 1))) (- 5)) 1)) (<= 3 (div (+ .cse2 (- 1)) (- 5))) (< .cse1 1))))) (forall ((v_prenex_16 Int)) (let ((.cse3 (* v_prenex_16 (- 1)))) (or (< (div .cse3 (- 5)) 1) (<= 3 (div (+ .cse3 (- 1)) (- 5))) (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 5)) 3)))))) is different from false [2020-07-21 22:07:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 28 trivial. 14 not checked. [2020-07-21 22:07:47,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877977477] [2020-07-21 22:07:47,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:07:47,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 30] total 52 [2020-07-21 22:07:47,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622136012] [2020-07-21 22:07:47,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-21 22:07:47,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:47,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-21 22:07:47,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2288, Unknown=2, NotChecked=194, Total=2652 [2020-07-21 22:07:47,438 INFO L87 Difference]: Start difference. First operand 54 states and 75 transitions. Second operand 52 states. [2020-07-21 22:08:09,934 WARN L193 SmtUtils]: Spent 20.49 s on a formula simplification. DAG size of input: 51 DAG size of output: 13 [2020-07-21 22:08:12,013 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-21 22:08:12,881 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:08:13,812 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:08:15,035 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:08:17,135 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:08:18,051 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:08:19,608 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:08:20,472 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:08:21,581 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:08:23,062 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:08:24,957 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:08:25,721 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:08:26,626 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:08:28,359 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:08:29,820 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 17 [2020-07-21 22:08:31,981 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 16 [2020-07-21 22:08:33,630 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:08:34,742 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:08:37,483 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:08:39,309 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:08:40,456 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:08:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:08:41,768 INFO L93 Difference]: Finished difference Result 81 states and 110 transitions. [2020-07-21 22:08:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 22:08:41,791 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 65 [2020-07-21 22:08:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:08:41,793 INFO L225 Difference]: With dead ends: 81 [2020-07-21 22:08:41,793 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 22:08:41,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 70 SyntacticMatches, 10 SemanticMatches, 73 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 61.7s TimeCoverageRelationStatistics Valid=548, Invalid=4714, Unknown=2, NotChecked=286, Total=5550 [2020-07-21 22:08:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 22:08:41,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2020-07-21 22:08:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 22:08:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 86 transitions. [2020-07-21 22:08:41,810 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 86 transitions. Word has length 65 [2020-07-21 22:08:41,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:08:41,814 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 86 transitions. [2020-07-21 22:08:41,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-21 22:08:41,815 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 86 transitions. [2020-07-21 22:08:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-21 22:08:41,825 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:08:41,825 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:08:42,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:42,039 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:08:42,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:08:42,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 9 times [2020-07-21 22:08:42,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:08:42,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562099826] [2020-07-21 22:08:42,041 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:42,099 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:08:42,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:08:42,102 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 105 conjunts are in the unsatisfiable core [2020-07-21 22:08:42,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:08:44,366 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:08:45,099 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:08:45,944 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:08:46,868 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:08:47,904 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:08:49,042 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:08:49,655 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:08:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 37 proven. 104 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-21 22:08:49,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:08:50,787 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:08:50,895 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:08:51,052 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:08:51,208 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:08:51,433 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:08:51,556 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:08:51,756 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:08:51,950 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:08:52,233 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:08:52,363 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:08:52,570 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:08:52,775 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:08:53,056 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:08:53,186 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:08:53,393 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:08:53,596 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:08:53,871 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:08:54,001 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:08:54,208 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:08:54,411 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:08:54,703 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:08:54,839 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:08:55,052 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:08:55,267 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:08:55,566 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:08:55,705 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:08:55,901 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:08:56,097 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:08:56,856 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:08:56,864 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:08:57,754 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-21 22:08:58,507 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:08:58,618 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:08:58,727 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:08:58,888 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:08:59,052 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:08:59,290 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:08:59,421 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:08:59,624 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:08:59,827 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:09:00,122 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:09:00,256 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:09:00,476 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:00,685 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:00,983 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:09:01,123 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:09:01,340 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:01,556 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:01,864 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:09:02,006 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:09:02,223 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:02,439 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:02,746 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:09:02,890 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:09:03,107 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:03,323 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:04,193 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:09:04,201 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:09:04,202 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:09:04,202 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:09:04,950 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:09:05,687 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:09:06,023 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:09:06,172 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:09:06,377 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:09:06,490 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:09:06,669 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:09:06,848 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:09:07,106 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:09:07,224 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:09:07,404 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:07,587 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:07,846 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:09:07,966 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:09:08,149 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:08,330 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:08,588 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:09:08,707 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:09:08,891 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:09,074 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:09,893 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 22:09:09,901 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:09:09,903 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 22:09:09,904 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:09:09,904 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:09:10,664 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:09:11,433 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:09:11,761 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:09:11,902 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:09:12,108 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:09:12,221 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:09:12,398 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:09:12,576 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:09:12,835 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:09:12,954 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:09:13,136 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:13,322 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:13,582 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:09:13,702 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:09:13,887 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:14,072 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:14,930 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 22:09:14,937 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:09:14,938 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:09:14,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:09:14,939 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:09:15,721 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:09:16,523 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:09:16,857 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:09:16,999 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:09:17,205 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:09:17,318 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:09:17,497 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:09:17,672 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:09:17,930 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:09:18,049 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:09:18,232 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:18,414 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:09:19,295 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 22:09:19,302 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:09:19,303 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:09:19,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:09:19,304 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:09:20,127 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:09:20,959 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:09:21,291 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:09:21,434 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:09:21,640 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:09:21,759 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:09:21,937 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:09:22,115 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:09:23,024 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 22:09:23,032 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:09:23,032 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:09:23,033 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:09:23,034 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 22:09:23,835 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:09:24,688 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:09:25,022 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:09:25,166 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:09:26,067 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:09:26,074 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:09:26,075 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:09:26,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:26,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:26,822 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-21 22:09:27,610 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:09:28,642 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:09:28,913 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:09:29,026 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:09:29,210 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 22:09:29,341 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 22:09:29,524 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 22:09:29,711 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 22:09:30,811 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 22:09:31,898 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 22:09:32,166 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:09:32,280 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:09:33,419 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:09:33,427 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:09:33,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:09:33,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:09:33,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:33,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:33,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:33,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:33,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:33,434 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:09:33,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:09:33,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:09:33,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:33,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:33,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:33,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:33,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:33,442 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:09:33,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:09:33,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:09:33,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:33,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:33,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:33,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:33,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:35,476 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (< |c_mult_#in~m| 1))) (and (forall ((v_mult_~n_BEFORE_CALL_69 Int)) (let ((.cse0 (* v_mult_~n_BEFORE_CALL_69 (- 1)))) (let ((.cse1 (div .cse0 (- 6)))) (or (<= 3 (div (+ .cse0 (- 1)) (- 6))) (< .cse1 (+ (div (+ .cse0 (* |c_mult_#res| (- 1))) (- 6)) 1)) (< .cse1 1))))) .cse2 (or .cse2 (forall ((v_mult_~n_BEFORE_CALL_69 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_69 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3))) (forall ((v_mult_~n_BEFORE_CALL_69 Int)) (let ((.cse3 (* v_mult_~n_BEFORE_CALL_69 (- 1)))) (or (<= 3 (div (+ .cse3 (- 1)) (- 6))) (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3) (< (div .cse3 (- 6)) 1)))))) is different from false [2020-07-21 22:09:37,512 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (< |c_mult_#in~m| 1))) (and (forall ((v_mult_~n_BEFORE_CALL_69 Int)) (let ((.cse0 (* v_mult_~n_BEFORE_CALL_69 (- 1)))) (let ((.cse1 (div .cse0 (- 6)))) (or (<= 3 (div (+ .cse0 (- 1)) (- 6))) (< .cse1 (+ (div (+ .cse0 (* |c_mult_#res| (- 1))) (- 6)) 1)) (< .cse1 1))))) (forall ((v_prenex_21 Int)) (let ((.cse2 (* v_prenex_21 (- 1)))) (or (< (div .cse2 (- 6)) 1) (<= 3 (div (+ .cse2 (- 1)) (- 6))) (< (div (+ .cse2 (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3)))) .cse3 (or (forall ((v_prenex_20 Int)) (< (div (+ (* v_prenex_20 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3)) .cse3))) is different from false [2020-07-21 22:09:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 6 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 16 not checked. [2020-07-21 22:09:38,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562099826] [2020-07-21 22:09:38,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:09:38,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 33] total 57 [2020-07-21 22:09:38,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145847116] [2020-07-21 22:09:38,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-21 22:09:38,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:09:38,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-21 22:09:38,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2794, Unknown=2, NotChecked=214, Total=3192 [2020-07-21 22:09:38,409 INFO L87 Difference]: Start difference. First operand 59 states and 86 transitions. Second operand 57 states. [2020-07-21 22:09:45,016 WARN L193 SmtUtils]: Spent 4.44 s on a formula simplification. DAG size of input: 51 DAG size of output: 13 [2020-07-21 22:09:47,193 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-21 22:09:48,197 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:09:49,629 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:09:50,986 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:09:52,821 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:09:53,972 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:09:55,279 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:09:56,465 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:09:57,357 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:09:59,811 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:10:00,656 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:10:01,967 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:10:02,865 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:10:04,215 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:10:05,093 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:10:09,259 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:10:12,590 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 17 [2020-07-21 22:10:14,181 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 16 [2020-07-21 22:10:15,148 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:10:16,094 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:10:18,087 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:10:20,231 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:10:21,023 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 22:10:22,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:10:22,269 INFO L93 Difference]: Finished difference Result 86 states and 123 transitions. [2020-07-21 22:10:22,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-21 22:10:22,291 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 72 [2020-07-21 22:10:22,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:10:22,292 INFO L225 Difference]: With dead ends: 86 [2020-07-21 22:10:22,293 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 22:10:22,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 79 SyntacticMatches, 10 SemanticMatches, 80 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 58.7s TimeCoverageRelationStatistics Valid=619, Invalid=5707, Unknown=2, NotChecked=314, Total=6642 [2020-07-21 22:10:22,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 22:10:22,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2020-07-21 22:10:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 22:10:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 98 transitions. [2020-07-21 22:10:22,306 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 98 transitions. Word has length 72 [2020-07-21 22:10:22,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:10:22,306 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 98 transitions. [2020-07-21 22:10:22,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-21 22:10:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 98 transitions. [2020-07-21 22:10:22,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-21 22:10:22,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:10:22,308 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:10:22,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:10:22,523 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:10:22,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:10:22,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1830896665, now seen corresponding path program 10 times [2020-07-21 22:10:22,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:10:22,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073962973] [2020-07-21 22:10:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:10:22,595 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:10:22,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:10:22,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 108 conjunts are in the unsatisfiable core [2020-07-21 22:10:22,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:10:23,137 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:10:23,574 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:10:24,146 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:10:24,826 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:10:26,913 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:10:28,380 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:10:29,009 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:10:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 16 proven. 110 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-07-21 22:10:29,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:10:30,072 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:10:30,197 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:10:30,442 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 22:10:30,640 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:10:30,897 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:10:31,147 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:10:31,522 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:10:31,723 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 22:10:31,987 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 22:10:32,269 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 22:10:32,640 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 22:10:32,839 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 22:10:33,111 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:10:33,392 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:10:34,085 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:10:34,093 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:10:35,259 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:10:35,397 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:10:35,652 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 22:10:35,854 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:10:36,132 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:10:36,415 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:10:36,789 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:10:36,997 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 22:10:37,282 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 22:10:37,565 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 22:10:38,339 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:10:38,347 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:10:38,348 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:10:39,490 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:10:39,630 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:10:39,890 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 22:10:40,093 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:10:40,374 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:10:40,651 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:10:41,440 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:10:41,449 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:10:41,449 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:10:41,450 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:10:41,451 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:10:42,233 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:10:42,558 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:10:42,694 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:10:43,415 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:10:43,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:43,424 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:10:43,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:45,262 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:10:45,962 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:10:46,702 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:10:47,039 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:10:47,197 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:10:47,394 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:10:47,667 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:10:47,839 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:10:48,093 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:10:48,209 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:10:48,389 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:10:48,572 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:10:48,822 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:10:48,945 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:10:49,129 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:10:49,318 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:10:49,599 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:10:49,743 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:10:49,950 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:10:50,156 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:10:50,997 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:10:51,838 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:10:51,952 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:10:52,068 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:10:52,238 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:10:52,409 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:10:52,657 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:10:52,793 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:10:53,006 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:10:53,218 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:10:53,518 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:10:53,660 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:10:53,888 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:10:54,107 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:10:54,419 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:10:54,557 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:10:54,778 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:10:55,000 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:10:55,898 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:10:55,907 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-21 22:10:55,908 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 4 conjuncts [2020-07-21 22:10:56,995 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:10:58,116 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 22:10:58,233 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:10:58,349 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:10:58,517 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:10:58,687 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:10:58,936 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:10:59,072 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:10:59,284 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:10:59,495 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:10:59,798 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:10:59,943 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:11:00,161 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:11:00,381 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:11:01,531 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 22:11:01,539 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:11:01,555 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:11:01,556 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 22:11:01,571 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:11:03,047 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-07-21 22:11:04,095 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:11:04,223 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:11:04,337 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:11:04,510 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:04,683 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:04,932 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:11:05,071 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:11:05,282 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:11:05,503 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:11:06,718 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:11:06,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073962973] [2020-07-21 22:11:06,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:11:06,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-21 22:11:06,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738313020] [2020-07-21 22:11:06,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:11:06,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:11:06,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:11:06,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2020-07-21 22:11:06,729 INFO L87 Difference]: Start difference. First operand 64 states and 98 transitions. Second operand 22 states. [2020-07-21 22:11:07,944 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-21 22:11:08,981 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2020-07-21 22:11:09,686 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2020-07-21 22:11:10,568 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2020-07-21 22:11:11,316 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2020-07-21 22:11:12,349 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2020-07-21 22:11:13,075 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2020-07-21 22:11:13,994 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2020-07-21 22:11:14,719 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2020-07-21 22:11:16,884 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-21 22:11:17,818 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-21 22:11:18,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:11:18,528 INFO L93 Difference]: Finished difference Result 72 states and 104 transitions. [2020-07-21 22:11:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 22:11:18,552 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-07-21 22:11:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:11:18,554 INFO L225 Difference]: With dead ends: 72 [2020-07-21 22:11:18,554 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 22:11:18,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=360, Invalid=2610, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 22:11:18,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 22:11:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-07-21 22:11:18,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 22:11:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 97 transitions. [2020-07-21 22:11:18,565 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 97 transitions. Word has length 72 [2020-07-21 22:11:18,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:11:18,566 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 97 transitions. [2020-07-21 22:11:18,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:11:18,566 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 97 transitions. [2020-07-21 22:11:18,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 22:11:18,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:11:18,567 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:11:18,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:11:18,769 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:11:18,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:11:18,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1394734426, now seen corresponding path program 11 times [2020-07-21 22:11:18,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:11:18,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975960765] [2020-07-21 22:11:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:11:18,840 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:11:18,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:11:18,843 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-21 22:11:18,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:11:22,258 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:22,736 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 2 proven. 85 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-21 22:11:22,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:11:23,638 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:23,764 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:23,963 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:11:24,224 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:11:24,397 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:11:24,631 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:11:24,753 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:11:24,920 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:11:25,081 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:11:25,537 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:11:25,543 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:11:26,253 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:26,369 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:26,552 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:11:26,662 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:11:26,827 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:11:26,985 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:11:27,538 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:11:27,545 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:11:27,546 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:11:27,546 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:11:27,547 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:11:28,283 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:28,406 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:28,935 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:11:28,942 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:11:28,943 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:11:29,407 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-21 22:11:29,912 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:11:30,777 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:30,906 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:31,086 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:11:31,350 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:11:31,512 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:11:31,754 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:11:32,026 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:11:32,199 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:11:32,433 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:11:32,540 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:11:32,701 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:11:32,877 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:11:33,112 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:11:33,362 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:11:33,530 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:11:34,904 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:35,041 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:35,231 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:11:35,485 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:11:35,642 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:11:35,895 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:11:36,016 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:11:36,206 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:11:36,394 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:11:36,661 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:11:36,788 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:11:36,972 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:11:37,156 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:11:37,809 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:11:37,817 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 22:11:37,818 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-21 22:11:38,686 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:38,823 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:39,026 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:11:39,142 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:11:39,315 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:11:39,484 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:11:39,736 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:11:39,848 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:11:40,026 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:11:40,201 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:11:40,863 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:11:40,870 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:11:40,871 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:11:41,330 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:41,469 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:41,666 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:11:41,952 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:11:42,116 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:11:42,124 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:11:42,125 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:11:42,125 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:11:42,126 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:11:42,450 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:42,586 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:42,595 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:11:42,596 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:11:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 118 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-21 22:11:42,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975960765] [2020-07-21 22:11:42,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:11:42,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 33 [2020-07-21 22:11:42,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391340409] [2020-07-21 22:11:42,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 22:11:42,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:11:42,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 22:11:42,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 22:11:42,822 INFO L87 Difference]: Start difference. First operand 64 states and 97 transitions. Second operand 33 states. [2020-07-21 22:11:44,220 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-21 22:11:45,287 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-21 22:11:45,888 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:11:46,794 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:11:47,644 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:11:48,661 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:11:49,297 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:11:50,211 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:11:50,827 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:11:51,823 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 22:11:52,563 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:11:53,615 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 22:11:54,342 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:11:56,306 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-21 22:11:57,581 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-21 22:11:58,582 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:11:59,672 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-07-21 22:12:00,801 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:12:01,871 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-21 22:12:02,579 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:12:03,471 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:04,831 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-21 22:12:05,686 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-21 22:12:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:12:05,943 INFO L93 Difference]: Finished difference Result 89 states and 128 transitions. [2020-07-21 22:12:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 22:12:05,964 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2020-07-21 22:12:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:12:05,967 INFO L225 Difference]: With dead ends: 89 [2020-07-21 22:12:05,967 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 22:12:05,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 88 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=426, Invalid=2766, Unknown=0, NotChecked=0, Total=3192 [2020-07-21 22:12:05,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 22:12:05,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-07-21 22:12:05,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 22:12:05,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 90 transitions. [2020-07-21 22:12:05,979 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 90 transitions. Word has length 65 [2020-07-21 22:12:05,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:12:05,979 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 90 transitions. [2020-07-21 22:12:05,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 22:12:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 90 transitions. [2020-07-21 22:12:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-21 22:12:05,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:12:05,981 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:12:06,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:12:06,192 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:12:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:12:06,192 INFO L82 PathProgramCache]: Analyzing trace with hash -313052920, now seen corresponding path program 12 times [2020-07-21 22:12:06,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:12:06,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157086368] [2020-07-21 22:12:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:12:06,277 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:12:06,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:12:06,280 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-21 22:12:06,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:12:12,733 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:13,436 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 7 proven. 199 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-07-21 22:12:13,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:12:14,569 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:14,710 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:14,908 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:12:15,029 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:12:15,202 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:15,375 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:15,615 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:12:15,737 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:15,912 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:16,080 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:16,341 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:16,452 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:16,628 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:16,819 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:17,074 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:17,200 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:17,382 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:17,558 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:17,798 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:17,922 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:18,100 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:18,271 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:18,526 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:18,646 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:18,820 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:18,989 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:19,249 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:19,365 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:19,524 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:12:19,705 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:12:20,381 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:12:20,388 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:21,361 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:21,507 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:21,717 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:12:21,833 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:12:22,016 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:22,194 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:22,462 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:12:22,582 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:22,771 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:22,966 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:23,227 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:23,354 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:23,539 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:23,730 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:23,991 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:24,116 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:24,302 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:24,484 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:24,743 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:24,863 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:25,048 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:25,230 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:25,499 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:25,615 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:25,800 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:25,987 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:26,673 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:12:26,680 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:26,681 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:12:28,027 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:28,161 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:28,374 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:12:28,482 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:12:28,649 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:28,831 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:29,083 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:12:29,199 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:29,387 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:29,566 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:29,831 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:29,956 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:30,147 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:30,342 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:30,621 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:30,747 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:30,944 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:31,140 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:31,416 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:31,543 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:31,736 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:31,928 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:32,680 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:12:32,687 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:32,688 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:32,688 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:32,689 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:34,038 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:34,182 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:34,408 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:12:34,527 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:12:34,717 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:34,932 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:35,217 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:12:35,363 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:35,584 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:35,806 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:36,121 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:36,255 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:36,477 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:36,698 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:37,011 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:37,156 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:37,360 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:37,581 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:38,464 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:12:38,471 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:38,472 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:38,473 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:38,473 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:39,280 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:12:39,503 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:12:39,677 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:39,851 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:40,105 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:12:40,243 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:12:40,447 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:40,664 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:40,979 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:12:41,124 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:41,348 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:41,560 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:41,873 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:42,020 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:42,242 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:42,464 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:43,375 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:12:43,383 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:43,384 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:12:44,394 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:44,539 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:44,784 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:12:44,922 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:12:45,134 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:45,348 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:45,653 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:12:45,797 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:46,016 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:46,237 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:47,211 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:12:47,219 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:47,220 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:12:48,377 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:12:48,495 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:12:48,669 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:48,844 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:49,104 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:12:49,244 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:12:49,459 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:49,676 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:50,671 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:12:50,680 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:50,680 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:12:51,682 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:12:51,798 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:12:51,972 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:52,144 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:53,132 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:12:53,140 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:53,141 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:53,141 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:53,142 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:12:54,011 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-21 22:12:54,843 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:12:55,859 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:12:55,966 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:12:56,224 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:56,376 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:12:56,599 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:12:56,719 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:12:56,911 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:57,103 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:12:57,379 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:12:57,505 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:57,692 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:57,878 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:12:58,151 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:12:58,281 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:12:58,474 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:12:58,669 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:12:59,482 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:13:00,342 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:13:00,675 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:13:00,817 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:13:01,035 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:13:01,155 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:13:01,347 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:13:01,543 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:13:01,836 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:13:01,971 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:13:02,183 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:13:02,401 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:13:03,556 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:13:03,565 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 22:13:03,566 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-21 22:13:04,773 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:13:06,003 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:13:06,124 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:13:06,244 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:13:06,424 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:13:06,601 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:13:06,851 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:13:06,994 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:13:07,216 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:13:07,439 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:13:08,794 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:13:08,801 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:13:08,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:08,803 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:13:08,816 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:13:10,195 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-07-21 22:13:11,518 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:13:11,640 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:13:11,761 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:13:11,939 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:13:12,118 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:13:13,599 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 22:13:13,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157086368] [2020-07-21 22:13:13,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:13:13,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-07-21 22:13:13,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644176132] [2020-07-21 22:13:13,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 22:13:13,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:13:13,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 22:13:13,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2578, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 22:13:13,616 INFO L87 Difference]: Start difference. First operand 62 states and 90 transitions. Second operand 24 states. [2020-07-21 22:13:16,000 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-21 22:13:17,647 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-21 22:13:18,672 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:13:19,729 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:13:21,048 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:13:22,433 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:13:23,800 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:13:24,889 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:13:26,242 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:13:27,838 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:13:29,200 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:13:30,282 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:13:31,645 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:13:32,739 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:13:34,085 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:13:37,447 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-21 22:13:38,806 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-21 22:13:39,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:13:39,968 INFO L93 Difference]: Finished difference Result 73 states and 107 transitions. [2020-07-21 22:13:40,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 22:13:40,000 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2020-07-21 22:13:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:13:40,002 INFO L225 Difference]: With dead ends: 73 [2020-07-21 22:13:40,002 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 22:13:40,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 102 SyntacticMatches, 11 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 48.8s TimeCoverageRelationStatistics Valid=518, Invalid=4452, Unknown=0, NotChecked=0, Total=4970 [2020-07-21 22:13:40,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 22:13:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-07-21 22:13:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:13:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 100 transitions. [2020-07-21 22:13:40,014 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 100 transitions. Word has length 93 [2020-07-21 22:13:40,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:13:40,014 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 100 transitions. [2020-07-21 22:13:40,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 22:13:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 100 transitions. [2020-07-21 22:13:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-21 22:13:40,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:13:40,016 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:13:40,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:13:40,233 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:13:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:13:40,233 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 13 times [2020-07-21 22:13:40,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:13:40,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747057210] [2020-07-21 22:13:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:13:40,332 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:13:40,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:13:40,337 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-21 22:13:40,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:13:40,978 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:13:41,452 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:13:42,782 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:13:43,618 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:13:44,562 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:13:45,611 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:13:47,918 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:13:48,630 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:13:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-07-21 22:13:48,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:13:49,704 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:13:49,824 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:13:50,000 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:13:50,177 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:13:50,434 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:13:50,582 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:13:50,800 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:13:51,019 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:13:51,339 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:13:51,488 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:13:51,718 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:13:51,954 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:13:52,276 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:13:52,429 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:13:52,667 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:13:52,893 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:13:53,204 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:13:53,348 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:13:53,589 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:13:53,828 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:13:54,154 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:13:54,302 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:13:54,543 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:13:54,781 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:13:55,115 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:13:55,256 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:13:55,492 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:13:55,724 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:13:56,051 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:13:56,203 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:13:56,421 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:13:56,642 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:13:57,422 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:13:57,430 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:13:58,280 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:13:58,400 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:13:58,576 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:13:58,760 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:13:59,013 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:13:59,153 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:13:59,371 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:13:59,589 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:13:59,906 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:14:00,054 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:00,280 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:00,504 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:00,824 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:14:00,968 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:01,192 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:01,416 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:01,698 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:14:01,818 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:02,008 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:02,202 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:02,460 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:14:02,588 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:02,774 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:02,964 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:03,230 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:14:03,352 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:03,543 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:03,725 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:04,439 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:14:04,445 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:14:04,446 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:14:05,803 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:05,943 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:06,160 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:14:06,275 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:14:06,448 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:14:06,627 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:14:06,883 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:14:07,015 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:07,214 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:07,408 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:07,684 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:14:07,835 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:08,079 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:08,307 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:08,578 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:14:08,705 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:08,905 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:09,094 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:09,365 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:14:09,491 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:09,683 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:09,874 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:10,620 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:14:10,627 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:14:10,628 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:14:11,993 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:12,141 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:12,354 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:14:12,478 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:14:12,661 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:14:12,846 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:14:13,117 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:14:13,251 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:13,458 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:13,662 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:13,955 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:14:14,091 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:14,298 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:14,505 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:14,795 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:14:14,936 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:15,143 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:15,350 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:16,189 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:14:16,197 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:14:16,198 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:14:17,051 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:14:17,159 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:14:17,320 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:17,481 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:17,714 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:14:17,842 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:14:18,041 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:14:18,240 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:14:18,534 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:14:18,668 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:18,876 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:19,081 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:19,380 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:14:19,514 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:19,721 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:19,928 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:20,795 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:14:20,803 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:14:20,803 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:14:20,804 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:14:20,804 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:14:21,691 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:14:21,800 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:14:21,961 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:22,121 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:22,353 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:14:22,480 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:14:22,682 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:14:22,887 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:14:23,179 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:14:23,315 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:23,525 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:23,732 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:14:24,629 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:14:24,637 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:14:24,637 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:14:25,720 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:14:25,830 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:14:25,993 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:26,154 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:26,388 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:14:26,524 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:14:26,728 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:14:26,930 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:14:27,853 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:14:27,861 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:14:27,862 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:14:28,780 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:14:28,888 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:14:29,051 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:29,213 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:30,120 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:14:30,128 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:14:30,129 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:14:30,947 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-21 22:14:31,815 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:14:32,905 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:14:33,014 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:14:33,123 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:14:33,279 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:33,441 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:33,676 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:14:33,804 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:14:34,005 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:14:34,211 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:14:34,505 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:14:34,641 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:14:34,835 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:14:35,027 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:14:35,967 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:14:36,947 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:14:37,059 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:14:37,168 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:14:37,331 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:37,494 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:37,736 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:14:37,865 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:14:38,068 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:14:38,270 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:14:39,298 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:14:39,307 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 22:14:39,308 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-21 22:14:40,404 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:14:41,619 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:14:41,729 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:14:41,838 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:14:42,004 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:42,167 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:14:43,404 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 22:14:43,413 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:14:43,427 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:14:43,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:14:43,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:14:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-21 22:14:43,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747057210] [2020-07-21 22:14:43,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:14:43,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 36] total 50 [2020-07-21 22:14:43,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205990955] [2020-07-21 22:14:43,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-21 22:14:43,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:14:43,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-21 22:14:43,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2286, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 22:14:43,686 INFO L87 Difference]: Start difference. First operand 65 states and 100 transitions. Second operand 50 states. [2020-07-21 22:14:46,277 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-21 22:14:48,160 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-21 22:14:49,231 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:14:50,824 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:14:52,417 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:14:54,402 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:14:55,954 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:14:57,467 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 22:14:58,596 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:15:00,170 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:15:01,278 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:15:02,390 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:15:05,234 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:15:06,361 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:15:07,996 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:15:09,120 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:15:10,723 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:15:11,822 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:15:13,507 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 22:15:15,182 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:15:17,591 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:15:19,675 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:15:20,935 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:15:22,411 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-21 22:15:26,235 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-21 22:15:27,695 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-21 22:15:27,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:15:27,702 INFO L93 Difference]: Finished difference Result 87 states and 125 transitions. [2020-07-21 22:15:27,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 22:15:27,703 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 86 [2020-07-21 22:15:27,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:15:27,704 INFO L225 Difference]: With dead ends: 87 [2020-07-21 22:15:27,704 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 22:15:27,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 108 SyntacticMatches, 15 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 52.7s TimeCoverageRelationStatistics Valid=630, Invalid=5222, Unknown=0, NotChecked=0, Total=5852 [2020-07-21 22:15:27,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 22:15:27,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 56. [2020-07-21 22:15:27,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 22:15:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 81 transitions. [2020-07-21 22:15:27,715 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 81 transitions. Word has length 86 [2020-07-21 22:15:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:15:27,715 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 81 transitions. [2020-07-21 22:15:27,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-21 22:15:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 81 transitions. [2020-07-21 22:15:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-21 22:15:27,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:15:27,718 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:15:27,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:15:27,933 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:15:27,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:15:27,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1525719705, now seen corresponding path program 14 times [2020-07-21 22:15:27,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:15:27,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313297439] [2020-07-21 22:15:27,934 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:15:28,043 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:15:28,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:15:28,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-21 22:15:28,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:15:28,722 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:15:29,167 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:15:29,729 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:15:30,393 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:15:31,162 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:15:32,853 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:15:33,536 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:15:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2020-07-21 22:15:33,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:15:34,445 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:15:34,555 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:15:34,717 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:15:34,880 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:15:35,115 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:15:35,243 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:15:35,444 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:15:35,644 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:15:35,939 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:15:36,075 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:15:36,285 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:36,493 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:36,792 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:15:36,930 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:15:37,140 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:37,350 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:37,647 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:15:37,783 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:15:37,978 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:15:38,173 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:15:38,788 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:15:38,795 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:15:39,470 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:15:39,586 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:15:39,747 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:15:39,909 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:15:40,143 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:15:40,272 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:15:40,473 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:15:40,674 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:15:40,968 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:15:41,105 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:15:41,312 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:41,520 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:41,814 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:15:41,950 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:15:42,159 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:42,372 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:43,080 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:15:43,087 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:15:43,088 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:15:43,784 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:15:43,892 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:15:44,055 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:15:44,217 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:15:44,452 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:15:44,579 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:15:44,782 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:15:44,982 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:15:45,278 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:15:45,413 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:15:45,623 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:45,830 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:46,558 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:15:46,566 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:15:46,567 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:15:46,567 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:15:46,568 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:15:47,470 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:15:47,580 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:15:47,743 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:15:47,904 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:15:48,139 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:15:48,273 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:15:48,476 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:15:48,677 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:15:49,438 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:15:49,445 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:15:49,446 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:15:50,188 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:15:50,296 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:15:50,457 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:15:50,618 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:15:51,369 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:15:51,377 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:15:51,378 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:15:52,109 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-21 22:15:52,772 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:15:53,561 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:15:53,919 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:15:54,073 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:15:54,286 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:15:54,405 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:15:54,594 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:15:54,779 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:15:55,049 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:15:55,178 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:15:55,372 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:55,560 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:55,826 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:15:55,947 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:15:56,136 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:56,324 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:56,592 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:15:56,713 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:15:56,912 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:57,106 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:15:57,370 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:15:57,492 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:15:57,667 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:15:57,836 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:15:58,528 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:15:59,226 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:15:59,571 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:15:59,716 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:15:59,939 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:16:00,053 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:16:00,239 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:00,424 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:00,699 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:16:00,831 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:16:01,033 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:01,234 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:01,514 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:16:01,639 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:16:01,836 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:02,036 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:02,315 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:16:02,442 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:16:02,638 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:02,833 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:03,638 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:16:03,646 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 22:16:03,647 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-21 22:16:04,497 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 22:16:05,499 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:16:05,707 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:16:05,858 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:16:06,008 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:16:06,223 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:16:06,339 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:16:06,525 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:06,709 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:06,988 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:16:07,124 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:16:07,334 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:07,542 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:07,840 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:16:07,976 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:16:08,186 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:08,402 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:11,455 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 22:16:11,463 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:16:11,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:11,465 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:16:11,477 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:16:12,957 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-21 22:16:13,805 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 22:16:14,156 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:16:14,301 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:16:14,518 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:16:14,634 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:16:14,822 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:15,006 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:15,276 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:16:15,395 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:16:15,589 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:15,773 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:16,823 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 22:16:16,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313297439] [2020-07-21 22:16:16,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:16:16,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-21 22:16:16,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312036062] [2020-07-21 22:16:16,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:16:16,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:16,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:16:16,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1665, Unknown=1, NotChecked=0, Total=1806 [2020-07-21 22:16:16,832 INFO L87 Difference]: Start difference. First operand 56 states and 81 transitions. Second operand 20 states. [2020-07-21 22:16:18,445 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-21 22:16:19,644 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-21 22:16:20,416 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:16:21,209 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:16:22,195 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:16:23,200 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:16:24,171 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:16:24,970 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:16:26,026 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:16:26,905 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:16:27,968 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:16:29,861 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-07-21 22:16:30,575 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-07-21 22:16:30,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:30,985 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-21 22:16:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 22:16:31,004 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 86 [2020-07-21 22:16:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:31,005 INFO L225 Difference]: With dead ends: 64 [2020-07-21 22:16:31,005 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 22:16:31,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=361, Invalid=2830, Unknown=1, NotChecked=0, Total=3192 [2020-07-21 22:16:31,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 22:16:31,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-07-21 22:16:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 22:16:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 80 transitions. [2020-07-21 22:16:31,017 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 80 transitions. Word has length 86 [2020-07-21 22:16:31,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:31,017 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 80 transitions. [2020-07-21 22:16:31,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:16:31,017 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 80 transitions. [2020-07-21 22:16:31,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-21 22:16:31,018 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:31,018 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:31,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:31,225 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:31,226 INFO L82 PathProgramCache]: Analyzing trace with hash -505812782, now seen corresponding path program 15 times [2020-07-21 22:16:31,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:31,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253563648] [2020-07-21 22:16:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:31,338 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:16:31,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:31,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-21 22:16:31,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:34,607 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 3 proven. 136 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-07-21 22:16:35,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:35,821 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:16:35,929 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:16:36,086 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:16:36,301 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:36,418 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:36,610 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:16:36,844 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:36,983 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:37,171 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:16:37,386 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:16:37,527 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:16:37,933 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:16:38,765 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:16:38,989 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:39,112 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:39,305 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:16:39,526 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:39,661 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:40,140 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:16:40,145 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:16:40,146 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:16:41,096 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:16:41,306 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:41,433 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:41,869 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:16:41,874 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:16:41,874 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:16:41,875 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:16:41,875 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:16:42,497 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:16:43,045 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:16:43,050 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:16:43,051 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:16:44,590 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:16:44,848 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:16:45,053 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:45,182 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:45,376 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:16:45,597 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:45,731 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:45,919 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:16:46,127 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:46,258 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:46,444 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:16:46,662 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:46,787 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:46,968 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:16:47,170 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:16:47,291 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:16:48,687 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:16:48,886 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:49,008 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:49,186 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:16:49,394 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:49,523 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:49,708 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:16:49,939 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:50,077 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:50,260 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:16:50,459 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:50,581 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:51,117 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:16:51,122 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-21 22:16:51,122 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:16:52,113 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:52,845 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 22:16:53,324 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:16:53,526 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:53,653 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:53,834 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:16:54,028 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:54,157 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:54,357 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:16:54,582 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:54,714 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:55,468 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 22:16:55,474 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:16:55,474 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 22:16:55,484 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:16:55,493 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:16:56,544 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-07-21 22:16:57,592 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:16:57,731 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:16:57,923 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:58,057 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:16:58,253 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:16:58,460 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:58,593 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:16:59,307 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:16:59,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253563648] [2020-07-21 22:16:59,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:16:59,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-21 22:16:59,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060644652] [2020-07-21 22:16:59,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:16:59,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:59,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:16:59,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 22:16:59,316 INFO L87 Difference]: Start difference. First operand 56 states and 80 transitions. Second operand 20 states. [2020-07-21 22:17:00,431 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-21 22:17:01,196 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-21 22:17:01,692 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:17:02,217 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-21 22:17:02,903 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:17:03,590 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:17:04,241 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:17:04,760 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:17:05,411 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:17:05,966 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 22:17:06,670 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-21 22:17:08,147 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-21 22:17:09,161 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-21 22:17:09,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:09,619 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2020-07-21 22:17:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 22:17:09,651 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2020-07-21 22:17:09,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:09,652 INFO L225 Difference]: With dead ends: 64 [2020-07-21 22:17:09,652 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 22:17:09,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=339, Invalid=2631, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 22:17:09,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 22:17:09,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-21 22:17:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 22:17:09,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 76 transitions. [2020-07-21 22:17:09,661 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 76 transitions. Word has length 79 [2020-07-21 22:17:09,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:09,667 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 76 transitions. [2020-07-21 22:17:09,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:17:09,667 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 76 transitions. [2020-07-21 22:17:09,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-21 22:17:09,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:09,669 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:09,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:09,883 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:09,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:09,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1104773667, now seen corresponding path program 16 times [2020-07-21 22:17:09,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:09,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605545574] [2020-07-21 22:17:09,885 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:10,005 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:17:10,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:10,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-21 22:17:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:17,498 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:18,321 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 8 proven. 236 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-07-21 22:17:18,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:19,373 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:17:19,611 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:17:19,754 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:17:19,962 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:17:20,077 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:17:20,253 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:17:20,430 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:17:20,681 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:17:20,798 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:20,983 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:21,165 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:21,422 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:21,542 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:21,724 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:21,906 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:22,168 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:22,284 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:22,467 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:22,650 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:22,908 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:23,028 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:23,213 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:23,397 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:23,658 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:23,776 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:23,960 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:24,142 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:24,402 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:24,523 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:24,703 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:24,884 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:25,144 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:25,274 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:25,463 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:17:25,642 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 22:17:26,332 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:17:26,339 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:17:27,151 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 22:17:27,394 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:17:27,534 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:17:27,737 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:17:27,849 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:17:28,026 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:17:28,203 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:17:28,458 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:17:28,576 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:28,758 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:28,940 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:29,200 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:29,321 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:29,505 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:29,696 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:30,011 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:30,170 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:30,387 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:30,598 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:30,869 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:30,983 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:31,169 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:31,352 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:31,614 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:31,737 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:31,923 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:32,113 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:32,377 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:32,500 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:32,686 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:32,871 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:33,620 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:17:33,627 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:17:33,627 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:17:34,627 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:17:34,770 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:17:34,989 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:17:35,102 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:17:35,281 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:17:35,457 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:17:35,714 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:17:35,831 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:36,010 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:36,185 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:36,494 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:36,620 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:36,802 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:36,987 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:37,253 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:37,374 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:37,550 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:37,737 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:38,005 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:38,139 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:38,369 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:38,562 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:38,820 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:38,938 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:39,118 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:39,301 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:40,061 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 22:17:40,067 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:17:40,068 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 22:17:41,460 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:17:41,603 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:17:41,813 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:17:41,926 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 22:17:42,100 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:17:42,278 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 22:17:42,544 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:17:42,666 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:42,846 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:43,028 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:43,287 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:43,407 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:43,587 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:43,771 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:44,028 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:44,147 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:44,327 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:44,509 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:44,774 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:17:44,894 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 22:17:45,076 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 22:17:45,261 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 21