/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 NOT_INCREMENTALLY -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 [2020-07-20 10:47:27,454 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 10:47:27,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:47:27,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:47:27,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:47:27,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:47:27,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:47:27,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:47:27,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:47:27,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:47:27,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:47:27,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:47:27,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:47:27,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:47:27,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:47:27,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:47:27,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:47:27,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:47:27,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:47:27,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:47:27,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:47:27,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:47:27,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:47:27,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:47:27,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:47:27,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:47:27,546 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 10:47:27,578 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:47:27,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:47:27,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:47:27,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:47:27,584 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:47:27,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:47:27,584 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:47:27,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:47:27,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:47:27,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:47:27,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:47:27,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:47:27,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:47:27,586 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:47:27,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:47:27,586 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:47:27,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:47:27,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:47:27,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:47:27,587 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:47:27,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:47:27,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:47:27,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:47:27,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:47:27,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:47:27,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:47:27,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:27,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:47:27,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:47:27,591 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 -> NOT_INCREMENTALLY [2020-07-20 10:47:27,904 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:47:27,919 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:47:27,922 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:47:27,923 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:47:27,923 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:47:27,924 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-20 10:47:28,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/322ffd1f0/78027fa2ec824c4e986c5c128bac306b/FLAG5c45bfdfc [2020-07-20 10:47:28,488 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:47:28,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-20 10:47:28,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/322ffd1f0/78027fa2ec824c4e986c5c128bac306b/FLAG5c45bfdfc [2020-07-20 10:47:28,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/322ffd1f0/78027fa2ec824c4e986c5c128bac306b [2020-07-20 10:47:28,903 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:47:28,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:47:28,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:47:28,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:47:28,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:47:28,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:47:28" (1/1) ... [2020-07-20 10:47:28,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33761369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:28, skipping insertion in model container [2020-07-20 10:47:28,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:47:28" (1/1) ... [2020-07-20 10:47:28,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:47:28,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:47:29,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:47:29,116 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:47:29,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:47:29,149 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:47:29,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:29 WrapperNode [2020-07-20 10:47:29,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:47:29,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:47:29,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:47:29,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:47:29,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:29" (1/1) ... [2020-07-20 10:47:29,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:29" (1/1) ... [2020-07-20 10:47:29,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:29" (1/1) ... [2020-07-20 10:47:29,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:29" (1/1) ... [2020-07-20 10:47:29,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:29" (1/1) ... [2020-07-20 10:47:29,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:29" (1/1) ... [2020-07-20 10:47:29,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:29" (1/1) ... [2020-07-20 10:47:29,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:47:29,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:47:29,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:47:29,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:47:29,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:47:29,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:47:29,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:47:29,321 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-07-20 10:47:29,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:47:29,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:47:29,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 10:47:29,321 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-07-20 10:47:29,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:47:29,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:47:29,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:47:29,530 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:47:29,531 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 10:47:29,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:47:29 BoogieIcfgContainer [2020-07-20 10:47:29,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:47:29,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:47:29,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:47:29,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:47:29,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:47:28" (1/3) ... [2020-07-20 10:47:29,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7047c327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:47:29, skipping insertion in model container [2020-07-20 10:47:29,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:29" (2/3) ... [2020-07-20 10:47:29,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7047c327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:47:29, skipping insertion in model container [2020-07-20 10:47:29,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:47:29" (3/3) ... [2020-07-20 10:47:29,543 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-07-20 10:47:29,551 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:47:29,558 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:47:29,569 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:47:29,590 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:47:29,590 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:47:29,590 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:47:29,590 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:47:29,591 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:47:29,591 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:47:29,591 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:47:29,591 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:47:29,606 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 10:47:29,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 10:47:29,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:29,614 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:47:29,614 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:29,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:29,619 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-07-20 10:47:29,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:29,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463628511] [2020-07-20 10:47:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:29,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 10:47:29,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 10:47:29,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:47:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 10:47:29,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463628511] [2020-07-20 10:47:29,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:29,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-20 10:47:29,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249347299] [2020-07-20 10:47:29,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 10:47:29,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:29,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 10:47:29,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:47:29,971 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-07-20 10:47:30,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:30,120 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-07-20 10:47:30,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 10:47:30,122 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-20 10:47:30,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:30,135 INFO L225 Difference]: With dead ends: 41 [2020-07-20 10:47:30,136 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 10:47:30,140 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 [2020-07-20 10:47:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 10:47:30,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 10:47:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 10:47:30,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-20 10:47:30,202 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-07-20 10:47:30,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:30,202 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-20 10:47:30,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 10:47:30,203 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-20 10:47:30,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 10:47:30,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:30,206 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] [2020-07-20 10:47:30,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:30,421 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:30,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-07-20 10:47:30,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:30,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180382584] [2020-07-20 10:47:30,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:30,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 10:47:30,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 10:47:30,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:47:30,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180382584] [2020-07-20 10:47:30,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:47:30,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 10:47:30,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368760752] [2020-07-20 10:47:30,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 10:47:30,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:30,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 10:47:30,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 10:47:30,513 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-07-20 10:47:30,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:30,583 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-20 10:47:30,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 10:47:30,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-07-20 10:47:30,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:30,586 INFO L225 Difference]: With dead ends: 29 [2020-07-20 10:47:30,586 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 10:47:30,587 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 [2020-07-20 10:47:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 10:47:30,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 10:47:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 10:47:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-07-20 10:47:30,596 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-07-20 10:47:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:30,597 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-07-20 10:47:30,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 10:47:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-07-20 10:47:30,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 10:47:30,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:30,599 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] [2020-07-20 10:47:30,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:30,803 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:30,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:30,805 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-07-20 10:47:30,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:30,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383917318] [2020-07-20 10:47:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:30,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 10:47:30,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 10:47:31,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:47:31,228 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:47:31,231 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-20 10:47:31,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:31,382 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:47:31,385 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:47:31,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:31,389 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:47:31,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:31,391 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:47:31,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:31,769 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-20 10:47:31,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:31,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:31,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:31,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:31,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:31,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:31,782 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:47:31,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:31,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:31,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:31,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:31,791 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:47:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 10:47:31,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383917318] [2020-07-20 10:47:31,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:31,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 22 [2020-07-20 10:47:31,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898044389] [2020-07-20 10:47:31,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:47:31,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:31,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:47:31,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:47:31,825 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 22 states. [2020-07-20 10:47:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:32,229 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-20 10:47:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 10:47:32,230 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2020-07-20 10:47:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:32,232 INFO L225 Difference]: With dead ends: 40 [2020-07-20 10:47:32,232 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 10:47:32,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2020-07-20 10:47:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 10:47:32,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-07-20 10:47:32,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 10:47:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-07-20 10:47:32,245 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-07-20 10:47:32,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:32,246 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-07-20 10:47:32,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:47:32,246 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-07-20 10:47:32,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 10:47:32,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:32,248 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] [2020-07-20 10:47:32,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:32,462 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:32,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:32,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-07-20 10:47:32,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:32,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572655401] [2020-07-20 10:47:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:32,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 10:47:32,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-20 10:47:32,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:47:32,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:32,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-20 10:47:32,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572655401] [2020-07-20 10:47:32,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:32,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-20 10:47:32,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799530226] [2020-07-20 10:47:32,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 10:47:32,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:32,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 10:47:32,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 10:47:32,694 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 8 states. [2020-07-20 10:47:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:32,798 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-07-20 10:47:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:47:32,798 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-07-20 10:47:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:32,801 INFO L225 Difference]: With dead ends: 39 [2020-07-20 10:47:32,801 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 10:47:32,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 10:47:32,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 10:47:32,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 10:47:32,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 10:47:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2020-07-20 10:47:32,826 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 43 [2020-07-20 10:47:32,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:32,826 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2020-07-20 10:47:32,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 10:47:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2020-07-20 10:47:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 10:47:32,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:32,829 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] [2020-07-20 10:47:33,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:33,033 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:33,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:33,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-07-20 10:47:33,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:33,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489926391] [2020-07-20 10:47:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:33,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-20 10:47:33,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 10:47:33,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:47:33,638 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:47:33,841 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:47:33,842 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:47:33,843 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:47:33,846 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:47:33,852 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-20 10:47:34,015 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:47:34,017 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:47:34,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:34,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:34,489 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:47:34,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:34,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:34,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:34,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:34,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:34,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:34,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:34,503 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:47:34,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:34,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:34,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:34,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:34,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:34,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:34,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:34,515 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:47:34,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:34,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:34,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:34,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:34,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:34,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:34,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:47:36,556 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 [2020-07-20 10:47:38,600 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 [2020-07-20 10:47:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 8 not checked. [2020-07-20 10:47:38,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489926391] [2020-07-20 10:47:38,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:38,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 37 [2020-07-20 10:47:38,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658785067] [2020-07-20 10:47:38,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 10:47:38,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:38,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 10:47:38,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1070, Unknown=2, NotChecked=134, Total=1332 [2020-07-20 10:47:38,681 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand 37 states. [2020-07-20 10:48:30,508 WARN L193 SmtUtils]: Spent 51.52 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-07-20 10:48:35,964 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-07-20 10:48:36,901 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 10:48:37,616 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 10:48:38,531 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:48:39,030 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 10:48:41,925 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 10:48:42,622 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 10:48:43,112 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-20 10:48:43,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:43,734 INFO L93 Difference]: Finished difference Result 71 states and 100 transitions. [2020-07-20 10:48:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 10:48:43,742 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2020-07-20 10:48:43,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:43,745 INFO L225 Difference]: With dead ends: 71 [2020-07-20 10:48:43,745 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 10:48:43,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 61.5s TimeCoverageRelationStatistics Valid=299, Invalid=2257, Unknown=2, NotChecked=198, Total=2756 [2020-07-20 10:48:43,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 10:48:43,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-07-20 10:48:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 10:48:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 74 transitions. [2020-07-20 10:48:43,764 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 74 transitions. Word has length 44 [2020-07-20 10:48:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:43,764 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 74 transitions. [2020-07-20 10:48:43,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 10:48:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 74 transitions. [2020-07-20 10:48:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-20 10:48:43,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:43,768 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:43,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:43,969 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:43,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1427454557, now seen corresponding path program 2 times [2020-07-20 10:48:43,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:43,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373889285] [2020-07-20 10:48:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:44,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 10:48:44,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2020-07-20 10:48:44,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:45,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:45,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 10:48:45,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373889285] [2020-07-20 10:48:45,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:45,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-20 10:48:45,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700468208] [2020-07-20 10:48:45,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 10:48:45,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:45,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 10:48:45,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 10:48:45,291 INFO L87 Difference]: Start difference. First operand 47 states and 74 transitions. Second operand 8 states. [2020-07-20 10:48:45,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:45,685 INFO L93 Difference]: Finished difference Result 53 states and 83 transitions. [2020-07-20 10:48:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:48:45,691 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2020-07-20 10:48:45,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:45,694 INFO L225 Difference]: With dead ends: 53 [2020-07-20 10:48:45,694 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 10:48:45,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 10:48:45,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 10:48:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-07-20 10:48:45,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 10:48:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 73 transitions. [2020-07-20 10:48:45,707 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 73 transitions. Word has length 64 [2020-07-20 10:48:45,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:45,708 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 73 transitions. [2020-07-20 10:48:45,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 10:48:45,708 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 73 transitions. [2020-07-20 10:48:45,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 10:48:45,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:45,711 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] [2020-07-20 10:48:45,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:45,925 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:45,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:45,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1146349017, now seen corresponding path program 4 times [2020-07-20 10:48:45,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:45,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508128312] [2020-07-20 10:48:45,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:45,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-20 10:48:45,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 10:48:47,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:48,534 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:48:48,535 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:48:49,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:49,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:49,428 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:48:49,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:48:49,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:50,548 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:48:51,987 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:48:51,988 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:48:52,653 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:48:52,654 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:48:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 10:48:53,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508128312] [2020-07-20 10:48:53,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:53,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 34 [2020-07-20 10:48:53,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393420891] [2020-07-20 10:48:53,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 10:48:53,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:53,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 10:48:53,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 10:48:53,202 INFO L87 Difference]: Start difference. First operand 47 states and 73 transitions. Second operand 34 states. [2020-07-20 10:48:53,668 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 10:48:54,253 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-20 10:48:55,020 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:48:55,834 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:48:56,396 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:48:57,121 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 10:48:58,141 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 10:48:58,783 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 10:48:59,678 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:49:00,082 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-20 10:49:01,587 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 10:49:02,749 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 10:49:03,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:49:03,724 INFO L93 Difference]: Finished difference Result 86 states and 140 transitions. [2020-07-20 10:49:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 10:49:03,735 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 44 [2020-07-20 10:49:03,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:49:03,739 INFO L225 Difference]: With dead ends: 86 [2020-07-20 10:49:03,739 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 10:49:03,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=484, Invalid=2822, Unknown=0, NotChecked=0, Total=3306 [2020-07-20 10:49:03,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 10:49:03,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-07-20 10:49:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 10:49:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 97 transitions. [2020-07-20 10:49:03,755 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 97 transitions. Word has length 44 [2020-07-20 10:49:03,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:49:03,756 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 97 transitions. [2020-07-20 10:49:03,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 10:49:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 97 transitions. [2020-07-20 10:49:03,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 10:49:03,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:49:03,760 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:49:03,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:03,978 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:49:03,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:49:03,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2085431083, now seen corresponding path program 3 times [2020-07-20 10:49:03,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:49:03,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174443698] [2020-07-20 10:49:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:49:04,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 10:49:04,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:49:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-07-20 10:49:04,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:49:04,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174443698] [2020-07-20 10:49:04,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:49:04,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 10:49:04,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180812574] [2020-07-20 10:49:04,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 10:49:04,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:49:04,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 10:49:04,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 10:49:04,113 INFO L87 Difference]: Start difference. First operand 56 states and 97 transitions. Second operand 5 states. [2020-07-20 10:49:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:49:04,426 INFO L93 Difference]: Finished difference Result 90 states and 160 transitions. [2020-07-20 10:49:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 10:49:04,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-07-20 10:49:04,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:49:04,437 INFO L225 Difference]: With dead ends: 90 [2020-07-20 10:49:04,437 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 10:49:04,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 10:49:04,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 10:49:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-20 10:49:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 10:49:04,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 94 transitions. [2020-07-20 10:49:04,452 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 94 transitions. Word has length 78 [2020-07-20 10:49:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:49:04,452 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 94 transitions. [2020-07-20 10:49:04,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 10:49:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 94 transitions. [2020-07-20 10:49:04,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-20 10:49:04,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:49:04,455 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:49:04,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:04,661 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:49:04,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:49:04,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1871495863, now seen corresponding path program 4 times [2020-07-20 10:49:04,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:49:04,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748931120] [2020-07-20 10:49:04,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:49:04,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 10:49:04,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:49:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 56 proven. 5 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-07-20 10:49:04,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:49:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 56 proven. 5 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-07-20 10:49:06,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748931120] [2020-07-20 10:49:06,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:49:06,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-20 10:49:06,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998296795] [2020-07-20 10:49:06,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 10:49:06,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:49:06,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 10:49:06,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-20 10:49:06,331 INFO L87 Difference]: Start difference. First operand 56 states and 94 transitions. Second operand 7 states. [2020-07-20 10:49:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:49:06,695 INFO L93 Difference]: Finished difference Result 82 states and 129 transitions. [2020-07-20 10:49:06,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:49:06,705 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-07-20 10:49:06,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:49:06,706 INFO L225 Difference]: With dead ends: 82 [2020-07-20 10:49:06,706 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 10:49:06,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 119 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 10:49:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 10:49:06,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2020-07-20 10:49:06,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 10:49:06,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-07-20 10:49:06,715 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 64 [2020-07-20 10:49:06,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:49:06,716 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-07-20 10:49:06,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 10:49:06,716 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-07-20 10:49:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 10:49:06,717 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:49:06,717 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] [2020-07-20 10:49:06,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:06,933 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:49:06,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:49:06,934 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 5 times [2020-07-20 10:49:06,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:49:06,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523464226] [2020-07-20 10:49:06,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:49:06,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 81 conjunts are in the unsatisfiable core [2020-07-20 10:49:06,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:49:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-20 10:49:09,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:49:10,132 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:49:10,506 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:49:10,887 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:49:11,256 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:49:11,793 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:49:12,140 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-20 10:49:13,126 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:49:13,511 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:49:14,093 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:14,094 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:49:14,095 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:49:14,096 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:49:14,097 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-20 10:49:15,432 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:49:16,040 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-20 10:49:16,045 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:16,046 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:16,047 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-20 10:49:16,048 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:16,984 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:49:17,565 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-20 10:49:17,571 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:17,572 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:17,572 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-20 10:49:17,573 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:18,862 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:18,863 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:49:18,864 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:49:18,864 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:18,865 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:20,869 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 10:49:21,339 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:49:22,035 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:49:22,040 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:49:22,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:22,042 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:49:22,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:49:22,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:22,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:49:22,045 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:49:22,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:49:22,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:49:22,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 8 proven. 96 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:49:22,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523464226] [2020-07-20 10:49:22,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:49:22,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 45 [2020-07-20 10:49:22,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457007301] [2020-07-20 10:49:22,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 10:49:22,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:49:22,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 10:49:22,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1830, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 10:49:22,527 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 45 states. [2020-07-20 10:49:23,595 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-20 10:49:24,337 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-20 10:49:24,751 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:49:25,190 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:49:25,829 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:49:27,180 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 10:49:27,622 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:49:28,452 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:49:28,885 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:49:29,478 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 10:49:30,122 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:49:31,040 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:49:32,234 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-07-20 10:49:33,160 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 16 [2020-07-20 10:49:33,814 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 17 [2020-07-20 10:49:34,495 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 18 [2020-07-20 10:49:35,112 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 17 [2020-07-20 10:49:35,662 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 10:49:36,390 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 17 [2020-07-20 10:49:36,950 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 10:49:37,675 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 16 [2020-07-20 10:49:39,173 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-20 10:49:40,771 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 10:49:42,088 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 10:49:42,410 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 10:49:42,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:49:42,436 INFO L93 Difference]: Finished difference Result 87 states and 118 transitions. [2020-07-20 10:49:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 10:49:42,445 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 58 [2020-07-20 10:49:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:49:42,448 INFO L225 Difference]: With dead ends: 87 [2020-07-20 10:49:42,448 INFO L226 Difference]: Without dead ends: 79 [2020-07-20 10:49:42,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=619, Invalid=4637, Unknown=0, NotChecked=0, Total=5256 [2020-07-20 10:49:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-20 10:49:42,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2020-07-20 10:49:42,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 10:49:42,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 93 transitions. [2020-07-20 10:49:42,466 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 93 transitions. Word has length 58 [2020-07-20 10:49:42,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:49:42,466 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 93 transitions. [2020-07-20 10:49:42,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 10:49:42,466 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 93 transitions. [2020-07-20 10:49:42,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 10:49:42,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:49:42,468 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] [2020-07-20 10:49:42,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:42,682 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:49:42,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:49:42,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1255254341, now seen corresponding path program 6 times [2020-07-20 10:49:42,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:49:42,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836964518] [2020-07-20 10:49:42,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:49:42,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 85 conjunts are in the unsatisfiable core [2020-07-20 10:49:42,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:49:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 62 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-07-20 10:49:44,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:49:45,155 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:49:45,558 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:46,551 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:46,553 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:46,554 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:46,555 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:47,333 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:47,334 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:47,335 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:47,336 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:48,536 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:49:48,908 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:49:49,073 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:49:49,323 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:49:50,868 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:49:51,415 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:49:51,416 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:56,547 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:49:57,198 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 10:49:57,202 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:49:57,203 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:49:57,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:49:57,698 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-20 10:49:58,890 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 10:49:58,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836964518] [2020-07-20 10:49:58,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:49:58,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-20 10:49:58,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619863415] [2020-07-20 10:49:58,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 10:49:58,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:49:58,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 10:49:58,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1077, Unknown=1, NotChecked=0, Total=1190 [2020-07-20 10:49:58,897 INFO L87 Difference]: Start difference. First operand 65 states and 93 transitions. Second operand 16 states. [2020-07-20 10:49:59,601 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-20 10:50:00,085 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-20 10:50:00,402 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:50:00,824 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:50:03,231 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:50:03,719 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:50:04,074 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:50:05,287 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:50:05,880 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:50:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:05,885 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2020-07-20 10:50:05,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 10:50:05,886 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-07-20 10:50:05,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:05,887 INFO L225 Difference]: With dead ends: 75 [2020-07-20 10:50:05,888 INFO L226 Difference]: Without dead ends: 71 [2020-07-20 10:50:05,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=246, Invalid=1732, Unknown=2, NotChecked=0, Total=1980 [2020-07-20 10:50:05,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-20 10:50:05,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-07-20 10:50:05,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 10:50:05,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 97 transitions. [2020-07-20 10:50:05,902 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 97 transitions. Word has length 58 [2020-07-20 10:50:05,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:05,902 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 97 transitions. [2020-07-20 10:50:05,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 10:50:05,903 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 97 transitions. [2020-07-20 10:50:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 10:50:05,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:50:05,904 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] [2020-07-20 10:50:06,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:06,118 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:50:06,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:50:06,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2039564078, now seen corresponding path program 7 times [2020-07-20 10:50:06,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:50:06,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286530642] [2020-07-20 10:50:06,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:50:06,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-20 10:50:06,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:50:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 5 proven. 134 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-07-20 10:50:08,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:50:09,627 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:50:10,033 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:50:10,207 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:10,314 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:10,468 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:50:10,641 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:10,745 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:10,894 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:50:11,065 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:11,173 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:11,320 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:50:11,890 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:12,552 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:50:12,960 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:50:13,157 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:13,262 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:13,410 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:50:13,812 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:50:14,423 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:14,424 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:14,425 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:14,426 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:15,122 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:50:15,531 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:50:15,945 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:50:16,543 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:16,544 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:50:17,185 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:50:17,434 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:50:17,583 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:50:17,757 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:17,862 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:18,256 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:18,257 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:50:19,069 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:50:19,735 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:19,735 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:50:20,574 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:20,574 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:20,575 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:20,576 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:21,940 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:50:22,288 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:50:22,672 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:50:24,060 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:50:24,474 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:50:24,675 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:24,782 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:25,245 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:50:25,246 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:26,654 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:50:27,501 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 10:50:27,507 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:27,508 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:27,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:50:28,130 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-07-20 10:50:29,613 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 10:50:29,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286530642] [2020-07-20 10:50:29,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:50:29,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-20 10:50:29,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722893492] [2020-07-20 10:50:29,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 10:50:29,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:50:29,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 10:50:29,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1830, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 10:50:29,620 INFO L87 Difference]: Start difference. First operand 67 states and 97 transitions. Second operand 20 states. [2020-07-20 10:50:30,571 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-20 10:50:31,231 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-20 10:50:31,650 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:50:32,067 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:50:32,616 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:50:33,189 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:50:33,738 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:50:34,188 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:50:34,790 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:50:35,439 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:50:35,933 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:50:37,587 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-07-20 10:50:38,177 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-07-20 10:50:38,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:38,182 INFO L93 Difference]: Finished difference Result 78 states and 112 transitions. [2020-07-20 10:50:38,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 10:50:38,182 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2020-07-20 10:50:38,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:38,184 INFO L225 Difference]: With dead ends: 78 [2020-07-20 10:50:38,184 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 10:50:38,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 86 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=384, Invalid=3038, Unknown=0, NotChecked=0, Total=3422 [2020-07-20 10:50:38,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 10:50:38,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-07-20 10:50:38,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 10:50:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 105 transitions. [2020-07-20 10:50:38,198 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 105 transitions. Word has length 79 [2020-07-20 10:50:38,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:38,198 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 105 transitions. [2020-07-20 10:50:38,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 10:50:38,198 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 105 transitions. [2020-07-20 10:50:38,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 10:50:38,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:50:38,200 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] [2020-07-20 10:50:38,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:38,403 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:50:38,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:50:38,404 INFO L82 PathProgramCache]: Analyzing trace with hash 912513436, now seen corresponding path program 8 times [2020-07-20 10:50:38,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:50:38,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821589458] [2020-07-20 10:50:38,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:50:38,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-20 10:50:38,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:50:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 3 proven. 81 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-07-20 10:50:40,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:50:41,002 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:50:41,414 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:50:41,837 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:50:42,369 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:43,026 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:50:43,201 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:50:43,309 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:50:43,463 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:50:43,646 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:43,759 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:44,095 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:44,096 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:50:44,915 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:50:45,092 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:50:45,197 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:50:45,528 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:45,529 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:45,530 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:45,531 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:46,406 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:46,407 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:46,408 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:46,409 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:47,716 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:50:47,888 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:50:47,994 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:50:48,145 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:50:48,326 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:48,440 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:50:48,605 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:50:48,798 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 10:50:48,906 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 10:50:50,290 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:50:50,909 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 10:50:50,910 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:50:51,434 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:50:51,719 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:50:51,724 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:51,726 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:51,727 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:51,728 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:51,970 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:51,971 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:51,971 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:51,972 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:50:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 14 proven. 112 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-20 10:50:52,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821589458] [2020-07-20 10:50:52,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:50:52,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 31 [2020-07-20 10:50:52,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551700031] [2020-07-20 10:50:52,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 10:50:52,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:50:52,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 10:50:52,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2020-07-20 10:50:52,057 INFO L87 Difference]: Start difference. First operand 70 states and 105 transitions. Second operand 31 states. [2020-07-20 10:50:52,943 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-20 10:50:53,742 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:50:54,091 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:50:54,518 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:50:55,140 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:50:55,669 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:50:56,094 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-20 10:50:56,550 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 10:50:58,303 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-07-20 10:50:59,050 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-07-20 10:50:59,815 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 10:50:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:59,932 INFO L93 Difference]: Finished difference Result 82 states and 115 transitions. [2020-07-20 10:50:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 10:50:59,940 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 65 [2020-07-20 10:50:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:59,942 INFO L225 Difference]: With dead ends: 82 [2020-07-20 10:50:59,942 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 10:50:59,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 90 SyntacticMatches, 10 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 10:50:59,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 10:50:59,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2020-07-20 10:50:59,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-20 10:50:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 96 transitions. [2020-07-20 10:50:59,953 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 96 transitions. Word has length 65 [2020-07-20 10:50:59,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:59,954 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 96 transitions. [2020-07-20 10:50:59,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 10:50:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 96 transitions. [2020-07-20 10:50:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 10:50:59,955 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:50:59,955 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] [2020-07-20 10:51:00,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:51:00,168 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:51:00,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:51:00,169 INFO L82 PathProgramCache]: Analyzing trace with hash -335786642, now seen corresponding path program 9 times [2020-07-20 10:51:00,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:51:00,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75677773] [2020-07-20 10:51:00,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:51:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:51:00,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-20 10:51:00,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:51:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 6 proven. 197 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-20 10:51:02,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:51:03,868 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:51:04,471 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:04,767 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:05,561 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:06,395 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:51:06,719 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:07,027 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:07,348 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:07,823 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:07,823 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:51:09,101 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:09,440 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:09,942 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:09,942 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:09,943 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:09,944 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:10,773 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:51:11,103 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:11,615 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:11,616 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:11,617 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:11,617 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:12,507 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:51:13,037 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:13,038 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:51:14,204 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:14,206 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:51:14,992 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:14,992 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:14,993 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:14,993 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:16,302 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:51:16,645 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:51:16,970 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:18,719 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:51:19,065 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:19,654 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 10:51:19,656 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:51:21,202 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:51:21,877 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:51:21,881 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:21,882 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:51:21,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:51:22,402 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-07-20 10:51:23,829 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 10:51:23,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75677773] [2020-07-20 10:51:23,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:51:23,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-20 10:51:23,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047668435] [2020-07-20 10:51:23,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:51:23,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:51:23,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:51:23,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2020-07-20 10:51:23,835 INFO L87 Difference]: Start difference. First operand 68 states and 96 transitions. Second operand 22 states. [2020-07-20 10:51:25,134 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-20 10:51:26,257 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:51:27,156 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:51:27,517 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:51:27,898 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:51:28,376 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:51:28,855 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:51:29,388 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:51:31,027 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:51:31,630 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:51:31,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:51:31,920 INFO L93 Difference]: Finished difference Result 79 states and 113 transitions. [2020-07-20 10:51:31,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 10:51:31,931 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2020-07-20 10:51:31,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:51:31,932 INFO L225 Difference]: With dead ends: 79 [2020-07-20 10:51:31,932 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 10:51:31,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 100 SyntacticMatches, 10 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=449, Invalid=3711, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 10:51:31,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 10:51:31,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2020-07-20 10:51:31,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-20 10:51:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 106 transitions. [2020-07-20 10:51:31,944 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 106 transitions. Word has length 93 [2020-07-20 10:51:31,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:51:31,944 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 106 transitions. [2020-07-20 10:51:31,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:51:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 106 transitions. [2020-07-20 10:51:31,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 10:51:31,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:51:31,946 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] [2020-07-20 10:51:32,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:51:32,159 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:51:32,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:51:32,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1394734426, now seen corresponding path program 10 times [2020-07-20 10:51:32,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:51:32,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926517903] [2020-07-20 10:51:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:51:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:51:32,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-20 10:51:32,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:51:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 2 proven. 85 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-20 10:51:34,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:51:34,884 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:51:35,353 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:35,991 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:51:36,581 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:36,582 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:36,582 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:36,583 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:37,295 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:37,296 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:37,296 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:37,297 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:38,608 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:51:38,751 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:51:39,112 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:39,469 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:40,542 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:51:40,872 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:51:41,192 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:41,682 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:51:41,682 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:42,531 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:51:43,049 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:43,050 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:51:43,648 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:43,648 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:51:43,882 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:43,883 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:43,883 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:43,884 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:51:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 118 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-20 10:51:43,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926517903] [2020-07-20 10:51:43,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:51:43,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 33 [2020-07-20 10:51:43,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591855170] [2020-07-20 10:51:43,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 10:51:43,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:51:43,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 10:51:43,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 10:51:43,979 INFO L87 Difference]: Start difference. First operand 71 states and 106 transitions. Second operand 33 states. [2020-07-20 10:51:44,707 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-20 10:51:46,000 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:51:46,954 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:51:47,873 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:51:48,454 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-20 10:51:49,272 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 10:51:50,466 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-20 10:51:51,008 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-20 10:51:51,658 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:51:52,101 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-07-20 10:51:52,924 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:51:53,690 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 10:51:54,326 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:51:54,732 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:51:54,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:51:54,871 INFO L93 Difference]: Finished difference Result 96 states and 137 transitions. [2020-07-20 10:51:54,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 10:51:54,879 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2020-07-20 10:51:54,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:51:54,881 INFO L225 Difference]: With dead ends: 96 [2020-07-20 10:51:54,881 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 10:51:54,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=426, Invalid=2766, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 10:51:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 10:51:54,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-07-20 10:51:54,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 10:51:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 112 transitions. [2020-07-20 10:51:54,891 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 112 transitions. Word has length 65 [2020-07-20 10:51:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:51:54,892 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 112 transitions. [2020-07-20 10:51:54,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 10:51:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 112 transitions. [2020-07-20 10:51:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-20 10:51:54,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:51:54,893 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] [2020-07-20 10:51:55,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:51:55,107 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:51:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:51:55,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 11 times [2020-07-20 10:51:55,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:51:55,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328456658] [2020-07-20 10:51:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:51:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:51:55,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 109 conjunts are in the unsatisfiable core [2020-07-20 10:51:55,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:51:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-07-20 10:51:57,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:51:58,058 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:51:58,365 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:51:58,676 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:58,995 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:59,347 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:51:59,772 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:00,354 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:52:00,530 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:52:00,777 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:52:00,965 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:52:01,075 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:52:01,237 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:52:01,578 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:52:02,048 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:02,049 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:02,049 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:02,050 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:02,851 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:52:03,162 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:52:03,649 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:03,650 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:03,651 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:03,651 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:04,456 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:52:04,948 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:04,949 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:52:06,017 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:06,017 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:52:06,730 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:06,731 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:52:08,182 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:52:09,768 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 10:52:09,769 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:52:11,106 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 10:52:11,110 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:11,116 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:11,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:52:11,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:52:11,128 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:52:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 10:52:11,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328456658] [2020-07-20 10:52:11,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:52:11,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 30] total 42 [2020-07-20 10:52:11,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313465657] [2020-07-20 10:52:11,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-20 10:52:11,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:52:11,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-20 10:52:11,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 10:52:11,244 INFO L87 Difference]: Start difference. First operand 75 states and 112 transitions. Second operand 42 states. [2020-07-20 10:52:12,671 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-20 10:52:13,150 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:52:13,822 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:52:15,941 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 10:52:16,750 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:52:17,280 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 10:52:17,785 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:52:19,087 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:52:20,135 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:52:20,576 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 10:52:21,288 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:52:22,637 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-07-20 10:52:23,159 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-07-20 10:52:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:52:23,361 INFO L93 Difference]: Finished difference Result 92 states and 126 transitions. [2020-07-20 10:52:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 10:52:23,369 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 72 [2020-07-20 10:52:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:52:23,370 INFO L225 Difference]: With dead ends: 92 [2020-07-20 10:52:23,371 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 10:52:23,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 91 SyntacticMatches, 12 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=484, Invalid=3676, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 10:52:23,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 10:52:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-07-20 10:52:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 10:52:23,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 105 transitions. [2020-07-20 10:52:23,380 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 105 transitions. Word has length 72 [2020-07-20 10:52:23,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:52:23,381 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 105 transitions. [2020-07-20 10:52:23,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-20 10:52:23,381 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 105 transitions. [2020-07-20 10:52:23,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 10:52:23,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:52:23,382 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] [2020-07-20 10:52:23,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:52:23,589 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:52:23,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:52:23,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1806425208, now seen corresponding path program 12 times [2020-07-20 10:52:23,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:52:23,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513071531] [2020-07-20 10:52:23,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:52:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:52:23,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-20 10:52:23,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:52:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-07-20 10:52:26,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:52:27,092 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:52:27,415 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:52:27,727 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:52:28,039 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:52:28,362 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:52:28,799 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:29,624 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:52:29,936 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:52:30,255 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:52:30,579 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:52:31,083 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:31,083 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:31,084 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:31,085 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:32,049 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:52:32,362 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:52:32,674 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:52:32,828 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:52:32,949 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:52:33,329 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:33,329 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:33,330 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:33,330 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:34,110 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:52:34,299 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:52:34,499 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:52:34,809 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:52:35,320 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:35,321 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:35,322 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:35,322 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:36,173 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:52:36,692 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:36,692 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:52:37,891 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:37,892 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:52:38,889 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:38,890 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:52:40,748 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:52:40,936 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:52:41,051 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:52:41,215 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:52:41,391 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 10:52:41,501 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 10:52:43,201 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 10:52:43,202 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:52:44,650 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 10:52:44,654 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:44,655 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:52:44,656 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 10:52:44,667 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:44,673 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:52:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 203 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-07-20 10:52:44,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513071531] [2020-07-20 10:52:44,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:52:44,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33] total 46 [2020-07-20 10:52:44,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757645650] [2020-07-20 10:52:44,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-20 10:52:44,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:52:44,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-20 10:52:44,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1920, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 10:52:44,774 INFO L87 Difference]: Start difference. First operand 75 states and 105 transitions. Second operand 46 states. [2020-07-20 10:52:48,898 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:52:49,426 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 10:52:50,176 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:52:50,940 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:52:52,239 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:52:52,773 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:52:53,773 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-20 10:52:54,326 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:52:55,257 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 10:52:55,936 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:52:57,876 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:52:58,402 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:52:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:52:58,405 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2020-07-20 10:52:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 10:52:58,405 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 79 [2020-07-20 10:52:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:52:58,406 INFO L225 Difference]: With dead ends: 91 [2020-07-20 10:52:58,406 INFO L226 Difference]: Without dead ends: 84 [2020-07-20 10:52:58,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 100 SyntacticMatches, 13 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=555, Invalid=4415, Unknown=0, NotChecked=0, Total=4970 [2020-07-20 10:52:58,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-20 10:52:58,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-07-20 10:52:58,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 10:52:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2020-07-20 10:52:58,415 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 79 [2020-07-20 10:52:58,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:52:58,415 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2020-07-20 10:52:58,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-20 10:52:58,415 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2020-07-20 10:52:58,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 10:52:58,416 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:52:58,417 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] [2020-07-20 10:52:58,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:52:58,632 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:52:58,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:52:58,633 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 13 times [2020-07-20 10:52:58,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:52:58,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857125746] [2020-07-20 10:52:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:52:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:52:58,735 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-20 10:52:58,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:53:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-07-20 10:53:01,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:53:02,655 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:53:02,974 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:03,290 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:03,613 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:03,933 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:04,249 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:04,711 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:05,501 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:53:05,690 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:53:05,804 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:53:05,971 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:53:06,150 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:53:06,267 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:53:06,435 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:06,629 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:53:06,747 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:53:06,910 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:07,107 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:53:07,226 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:53:07,400 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:07,597 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:53:07,702 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:53:07,870 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:08,064 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:53:08,182 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:53:08,619 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 10:53:08,625 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:08,625 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:08,626 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:08,627 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:09,728 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:53:10,047 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:10,371 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:10,691 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:10,873 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:53:10,991 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:53:11,443 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 10:53:11,449 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:11,449 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:11,450 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:11,451 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:12,480 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:53:12,795 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:13,113 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:13,644 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:13,645 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:13,645 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:13,646 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:14,523 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:53:14,843 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:15,378 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:15,379 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:53:16,265 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:53:16,807 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:16,808 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:53:18,009 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:18,010 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:53:18,857 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:18,858 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:18,858 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:18,859 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:20,497 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:53:22,294 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 10:53:22,294 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:53:22,807 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 10:53:24,130 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 10:53:24,133 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:24,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:53:24,141 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:24,148 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:53:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-20 10:53:24,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857125746] [2020-07-20 10:53:24,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:53:24,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 36] total 50 [2020-07-20 10:53:24,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253062100] [2020-07-20 10:53:24,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 10:53:24,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:53:24,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 10:53:24,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2286, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 10:53:24,256 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand 50 states. [2020-07-20 10:53:27,327 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:53:28,003 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:53:28,562 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:53:29,168 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 10:53:30,789 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:53:31,756 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:53:32,150 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:53:33,113 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:53:33,667 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:53:34,070 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:53:35,691 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:53:37,057 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:53:37,684 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 10:53:38,733 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:53:39,275 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:53:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:53:39,279 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2020-07-20 10:53:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 10:53:39,279 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 86 [2020-07-20 10:53:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:53:39,281 INFO L225 Difference]: With dead ends: 94 [2020-07-20 10:53:39,281 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 10:53:39,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 108 SyntacticMatches, 15 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=630, Invalid=5222, Unknown=0, NotChecked=0, Total=5852 [2020-07-20 10:53:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 10:53:39,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2020-07-20 10:53:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 10:53:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2020-07-20 10:53:39,290 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 86 [2020-07-20 10:53:39,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:53:39,290 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2020-07-20 10:53:39,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-20 10:53:39,290 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2020-07-20 10:53:39,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 10:53:39,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:53:39,292 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] [2020-07-20 10:53:39,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:53:39,506 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:53:39,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:53:39,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1525719705, now seen corresponding path program 14 times [2020-07-20 10:53:39,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:53:39,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181459590] [2020-07-20 10:53:39,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:53:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:53:39,614 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-20 10:53:39,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:53:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2020-07-20 10:53:41,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:53:42,857 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:53:43,185 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:43,521 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:43,947 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:44,792 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:53:45,117 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:45,620 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:45,621 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:45,621 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:45,622 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:46,465 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:53:47,006 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:47,007 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:47,008 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:47,008 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:48,110 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:48,110 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:48,111 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:48,111 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:48,841 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:48,842 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:48,843 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:48,843 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:50,306 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:53:50,660 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:50,986 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:51,310 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:52,742 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:53:53,068 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:53,408 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:53,948 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 10:53:53,948 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:53:56,425 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 10:53:57,715 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:53:58,041 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:53:58,676 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 10:53:58,680 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:53:58,680 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:53:58,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:53:59,369 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-20 10:54:00,414 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:54:01,103 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 10:54:01,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181459590] [2020-07-20 10:54:01,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:54:01,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-20 10:54:01,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410909811] [2020-07-20 10:54:01,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 10:54:01,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:54:01,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 10:54:01,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1665, Unknown=1, NotChecked=0, Total=1806 [2020-07-20 10:54:01,108 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand 20 states. [2020-07-20 10:54:03,467 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:54:03,905 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:54:04,331 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:54:04,665 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:54:07,028 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:54:07,362 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:54:07,768 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:54:08,934 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-07-20 10:54:09,359 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-07-20 10:54:09,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:54:09,363 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2020-07-20 10:54:09,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 10:54:09,363 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 86 [2020-07-20 10:54:09,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:54:09,364 INFO L225 Difference]: With dead ends: 82 [2020-07-20 10:54:09,365 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 10:54:09,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=360, Invalid=2830, Unknown=2, NotChecked=0, Total=3192 [2020-07-20 10:54:09,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 10:54:09,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-07-20 10:54:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 10:54:09,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 98 transitions. [2020-07-20 10:54:09,373 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 98 transitions. Word has length 86 [2020-07-20 10:54:09,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:54:09,373 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 98 transitions. [2020-07-20 10:54:09,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 10:54:09,373 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 98 transitions. [2020-07-20 10:54:09,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 10:54:09,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:54:09,374 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:54:09,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:54:09,588 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:54:09,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:54:09,589 INFO L82 PathProgramCache]: Analyzing trace with hash -330893523, now seen corresponding path program 15 times [2020-07-20 10:54:09,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:54:09,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97021805] [2020-07-20 10:54:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:54:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:54:09,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-20 10:54:09,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:54:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 8 proven. 315 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2020-07-20 10:54:14,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:54:14,832 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:54:15,184 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:54:15,508 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:15,842 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:16,169 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:16,499 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:16,826 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:17,156 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:17,651 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:18,545 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:54:18,874 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:19,209 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:19,542 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:19,870 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:20,204 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:20,743 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:20,743 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:20,744 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:20,744 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:21,657 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:54:21,987 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:22,314 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:22,646 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:22,975 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:23,521 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:23,522 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:23,522 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:23,523 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:24,594 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:54:24,925 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:25,250 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:25,575 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:26,210 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 10:54:26,216 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:26,216 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:26,217 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:26,218 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:27,271 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:54:27,442 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:54:27,547 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:54:27,662 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:54:27,988 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:28,325 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:28,902 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:28,903 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:54:29,763 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:54:30,081 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:54:30,409 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:30,569 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:54:31,106 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:31,107 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:31,108 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:31,109 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:32,075 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:54:32,669 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:32,669 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:54:33,956 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:33,957 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:33,957 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:33,958 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:34,884 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:34,885 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:54:36,577 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:54:36,991 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:54:37,391 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:37,725 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:38,049 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:39,500 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:54:39,690 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:54:39,887 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:54:40,217 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:40,553 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:41,211 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 10:54:41,212 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:54:42,867 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:54:43,234 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:54:44,219 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:54:44,225 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:44,226 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-20 10:54:44,235 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:44,245 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:54:45,203 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-07-20 10:54:46,472 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:54:47,259 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 10:54:47,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97021805] [2020-07-20 10:54:47,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:54:47,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-20 10:54:47,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536302518] [2020-07-20 10:54:47,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 10:54:47,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:54:47,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 10:54:47,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3000, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 10:54:47,267 INFO L87 Difference]: Start difference. First operand 74 states and 98 transitions. Second operand 26 states. [2020-07-20 10:54:48,775 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-20 10:54:50,166 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:54:50,764 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:54:51,305 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:54:51,723 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:54:52,144 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:54:52,564 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:54:53,103 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:54:53,522 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:54:54,052 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:54:54,675 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:54:55,200 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:54:55,614 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:54:56,145 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:54:56,989 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-07-20 10:54:57,683 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-07-20 10:54:57,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:54:57,969 INFO L93 Difference]: Finished difference Result 85 states and 115 transitions. [2020-07-20 10:54:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 10:54:57,978 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 114 [2020-07-20 10:54:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:54:57,980 INFO L225 Difference]: With dead ends: 85 [2020-07-20 10:54:57,980 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 10:54:57,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 124 SyntacticMatches, 13 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=591, Invalid=5261, Unknown=0, NotChecked=0, Total=5852 [2020-07-20 10:54:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 10:54:57,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-07-20 10:54:57,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 10:54:57,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 108 transitions. [2020-07-20 10:54:57,988 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 108 transitions. Word has length 114 [2020-07-20 10:54:57,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:54:57,988 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 108 transitions. [2020-07-20 10:54:57,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 10:54:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 108 transitions. [2020-07-20 10:54:57,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 10:54:57,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:54:57,990 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] [2020-07-20 10:54:58,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:54:58,205 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:54:58,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:54:58,205 INFO L82 PathProgramCache]: Analyzing trace with hash 365189506, now seen corresponding path program 16 times [2020-07-20 10:54:58,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:54:58,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823350338] [2020-07-20 10:54:58,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:54:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:54:58,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-20 10:54:58,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:55:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 8 proven. 201 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-07-20 10:55:02,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:55:03,084 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:55:03,428 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:03,758 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:04,096 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:04,432 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:04,772 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:04,976 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:55:05,098 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:55:05,269 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:05,536 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 10:55:05,987 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:06,855 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:55:07,135 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:55:07,314 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:55:07,520 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:55:07,632 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:55:07,749 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:08,082 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:08,420 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:08,762 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:09,101 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:09,656 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:09,657 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:55:10,452 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:55:10,574 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:55:10,753 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:55:11,207 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:11,413 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:55:11,538 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:55:11,715 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:11,908 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:55:12,032 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:55:12,208 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:12,419 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:55:12,545 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:55:12,703 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:12,907 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:55:13,030 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:55:13,473 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:13,473 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:13,474 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:13,474 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:14,568 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:55:14,903 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:15,242 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:15,577 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:16,148 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:16,148 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:55:17,242 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:55:17,574 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:17,908 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:18,499 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:18,500 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:18,501 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:18,501 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:19,471 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:55:19,805 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:20,389 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:20,390 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:20,391 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:20,391 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:21,361 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:55:21,960 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:21,961 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:21,961 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:21,962 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:23,287 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:23,288 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:23,288 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:23,289 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:24,240 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:24,240 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:24,241 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:24,241 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:26,036 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:55:27,982 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:55:27,983 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:29,675 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 10:55:29,679 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:29,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:55:29,680 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:29,686 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:55:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 35 proven. 315 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-07-20 10:55:29,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823350338] [2020-07-20 10:55:29,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:55:29,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 39] total 54 [2020-07-20 10:55:29,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097063756] [2020-07-20 10:55:29,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-20 10:55:29,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:55:29,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-20 10:55:29,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2684, Unknown=0, NotChecked=0, Total=2862 [2020-07-20 10:55:29,809 INFO L87 Difference]: Start difference. First operand 77 states and 108 transitions. Second operand 54 states. [2020-07-20 10:55:30,794 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-20 10:55:31,517 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-20 10:55:32,392 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:55:33,016 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:55:34,033 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:55:34,959 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:55:36,148 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 10:55:36,633 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:55:37,549 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:55:38,751 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:55:39,584 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:55:40,250 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:55:41,158 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:55:41,856 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:55:42,762 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:55:43,446 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:55:44,359 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:55:45,111 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-20 10:55:46,085 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:55:46,801 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:55:48,448 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 10:55:49,342 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-07-20 10:55:49,975 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-07-20 10:55:50,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:55:50,174 INFO L93 Difference]: Finished difference Result 99 states and 133 transitions. [2020-07-20 10:55:50,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 10:55:50,183 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 93 [2020-07-20 10:55:50,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:55:50,184 INFO L225 Difference]: With dead ends: 99 [2020-07-20 10:55:50,185 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 10:55:50,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 117 SyntacticMatches, 16 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=709, Invalid=6097, Unknown=0, NotChecked=0, Total=6806 [2020-07-20 10:55:50,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 10:55:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2020-07-20 10:55:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 10:55:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2020-07-20 10:55:50,192 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 93 [2020-07-20 10:55:50,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:55:50,192 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2020-07-20 10:55:50,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-20 10:55:50,192 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2020-07-20 10:55:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 10:55:50,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:55:50,193 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] [2020-07-20 10:55:50,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:55:50,407 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:55:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:55:50,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1343946330, now seen corresponding path program 17 times [2020-07-20 10:55:50,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:55:50,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839013756] [2020-07-20 10:55:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:55:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:55:50,551 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-20 10:55:50,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:55:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 4 proven. 199 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-20 10:55:53,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:55:54,277 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:55:54,617 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:54,964 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:55,434 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:56,313 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:55:56,649 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:55:57,177 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:57,177 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:55:58,073 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:55:58,605 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:58,606 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:55:59,795 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:55:59,796 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:56:00,606 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:56:00,607 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:56:00,607 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:56:00,608 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:56:02,220 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:56:02,560 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:02,902 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:03,248 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:03,585 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:05,103 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:56:05,450 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:05,791 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:06,134 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:06,716 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:56:06,717 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:56:08,173 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:56:08,513 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:08,850 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:13,568 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:56:13,571 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:56:13,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:13,572 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:56:13,578 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:56:15,610 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (<= 4 |c_mult_#in~m|)) (.cse2 (forall ((|v_mult_#in~n_BEFORE_CALL_214| Int)) (or (not (= 0 (mod (* |v_mult_#in~n_BEFORE_CALL_214| 2) (- 4)))) (= (* 4 (div (* |v_mult_#in~n_BEFORE_CALL_214| (- 6)) (- 4))) (+ |v_mult_#in~n_BEFORE_CALL_214| |c_mult_#res| |c_mult_#in~n|))))) (.cse3 (<= |c_mult_#in~m| 4))) (and (forall ((|v_mult_#in~n_BEFORE_CALL_214| Int)) (let ((.cse0 (* 4 (div (* |v_mult_#in~n_BEFORE_CALL_214| (- 6)) (- 4))))) (or (not (= 0 (mod (* |v_mult_#in~n_BEFORE_CALL_214| 2) (- 4)))) (= .cse0 (+ |v_mult_#in~n_BEFORE_CALL_214| |c_mult_#res| |c_mult_#in~n|)) (not (= .cse0 (+ |v_mult_#in~n_BEFORE_CALL_214| (* 5 |c_mult_#in~n|))))))) .cse1 (or .cse1 .cse2) (or .cse2 .cse3) .cse3)) is different from false [2020-07-20 10:56:18,583 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2020-07-20 10:56:25,921 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:56:26,285 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:26,490 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:56:26,599 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:56:27,354 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 10:56:27,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839013756] [2020-07-20 10:56:27,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:56:27,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-20 10:56:27,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106574368] [2020-07-20 10:56:27,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:56:27,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:56:27,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:56:27,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1835, Unknown=4, NotChecked=86, Total=2070 [2020-07-20 10:56:27,361 INFO L87 Difference]: Start difference. First operand 77 states and 103 transitions. Second operand 22 states. [2020-07-20 10:56:28,561 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-20 10:56:29,379 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-20 10:56:29,930 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:56:30,634 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:56:31,248 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:56:32,088 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:56:32,656 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:56:33,210 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:56:33,762 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:56:36,443 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:56:36,809 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:56:37,291 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:56:37,653 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:56:38,634 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-20 10:56:39,134 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-20 10:56:39,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:56:39,278 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2020-07-20 10:56:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 10:56:39,288 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2020-07-20 10:56:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:56:39,289 INFO L225 Difference]: With dead ends: 87 [2020-07-20 10:56:39,289 INFO L226 Difference]: Without dead ends: 83 [2020-07-20 10:56:39,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=400, Invalid=3260, Unknown=4, NotChecked=118, Total=3782 [2020-07-20 10:56:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-20 10:56:39,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2020-07-20 10:56:39,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 10:56:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2020-07-20 10:56:39,297 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 93 [2020-07-20 10:56:39,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:56:39,298 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2020-07-20 10:56:39,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:56:39,298 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2020-07-20 10:56:39,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 10:56:39,299 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:56:39,299 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] [2020-07-20 10:56:39,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:56:39,500 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:56:39,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:56:39,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1182847487, now seen corresponding path program 18 times [2020-07-20 10:56:39,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:56:39,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608182928] [2020-07-20 10:56:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:56:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:56:39,656 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-20 10:56:39,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:56:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 9 proven. 238 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-07-20 10:56:44,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:56:45,206 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:56:45,558 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:45,901 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:46,252 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:46,600 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:46,943 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:47,290 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:47,639 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:48,181 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:56:49,140 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:56:49,488 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:49,842 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:50,188 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:50,532 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:50,880 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:51,223 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:51,807 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:56:51,807 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:56:52,991 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:56:53,347 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:53,684 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:54,025 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:54,376 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:54,720 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:55,313 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:56:55,314 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:56:56,302 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:56:56,656 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:57,003 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:57,351 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:57,700 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:56:58,304 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:56:58,305 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:56:59,468 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:56:59,813 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:57:00,158 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:57:00,502 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:57:01,118 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:01,118 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:01,119 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:01,119 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:02,275 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:57:02,627 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:57:02,973 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:57:03,608 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:03,608 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:57:04,619 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:57:04,967 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:57:05,604 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:05,605 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:05,605 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:05,606 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:06,649 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:57:07,300 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:07,300 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:07,301 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:07,301 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:08,718 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:08,718 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:57:09,765 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:09,765 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:09,766 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:09,767 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:11,754 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:57:14,038 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 10:57:14,043 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:57:14,043 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:15,219 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 10:57:16,131 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 10:57:17,796 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 10:57:17,801 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:17,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:57:17,811 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:17,820 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:57:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 380 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-07-20 10:57:18,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608182928] [2020-07-20 10:57:18,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:57:18,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 42] total 58 [2020-07-20 10:57:18,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273557508] [2020-07-20 10:57:18,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-20 10:57:18,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:57:18,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-20 10:57:18,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3114, Unknown=0, NotChecked=0, Total=3306 [2020-07-20 10:57:18,046 INFO L87 Difference]: Start difference. First operand 77 states and 103 transitions. Second operand 58 states. [2020-07-20 10:57:19,694 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-20 10:57:20,807 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-20 10:57:21,478 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:57:22,171 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:57:23,001 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:57:23,816 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:57:24,495 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:57:25,490 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 10:57:25,955 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:57:26,906 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:57:28,126 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:57:29,035 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:57:29,718 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:57:30,647 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:57:31,356 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:57:32,286 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:57:32,980 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:57:33,929 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:57:34,656 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:57:35,609 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:57:36,384 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-20 10:57:37,600 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:57:39,557 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 10:57:40,367 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 10:57:41,395 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:57:42,536 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 10:57:44,662 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:57:45,614 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 10:57:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:57:45,619 INFO L93 Difference]: Finished difference Result 102 states and 139 transitions. [2020-07-20 10:57:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-20 10:57:45,619 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 100 [2020-07-20 10:57:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:57:45,621 INFO L225 Difference]: With dead ends: 102 [2020-07-20 10:57:45,621 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 10:57:45,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 124 SyntacticMatches, 19 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=792, Invalid=7040, Unknown=0, NotChecked=0, Total=7832 [2020-07-20 10:57:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 10:57:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-07-20 10:57:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 10:57:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 108 transitions. [2020-07-20 10:57:45,630 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 108 transitions. Word has length 100 [2020-07-20 10:57:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:57:45,631 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 108 transitions. [2020-07-20 10:57:45,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-20 10:57:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 108 transitions. [2020-07-20 10:57:45,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 10:57:45,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:57:45,632 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] [2020-07-20 10:57:45,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:57:45,846 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:57:45,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:57:45,847 INFO L82 PathProgramCache]: Analyzing trace with hash -192564829, now seen corresponding path program 19 times [2020-07-20 10:57:45,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:57:45,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256763567] [2020-07-20 10:57:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:57:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:57:46,016 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-20 10:57:46,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:57:50,714 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:57:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 4 proven. 237 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-07-20 10:57:51,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:57:52,145 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 10:57:52,292 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:57:52,503 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:57:52,630 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:57:52,815 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:57:53,028 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:57:53,162 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:57:53,352 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:57:53,569 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:57:53,699 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:57:53,890 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:57:54,100 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 10:57:54,223 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 10:57:54,679 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:55,582 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:57:55,785 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:57:55,911 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:57:56,090 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:57:56,306 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:57:56,438 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:57:56,567 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:57:57,127 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:57,128 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:57:58,073 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:57:58,651 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:58,652 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:57:59,920 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:57:59,921 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:58:00,804 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:58:00,805 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:58:02,526 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:58:02,878 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:03,228 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:03,579 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:03,935 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:04,287 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:05,891 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:58:06,252 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:06,604 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:06,959 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:07,316 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:07,957 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:58:07,958 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:58:11,538 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:58:11,891 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:12,245 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:12,597 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:15,336 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-20 10:58:15,340 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:58:15,341 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:58:15,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 10:58:16,067 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-07-20 10:58:17,233 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:58:17,586 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:17,945 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:18,738 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 10:58:18,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256763567] [2020-07-20 10:58:18,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:58:18,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-07-20 10:58:18,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320251749] [2020-07-20 10:58:18,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 10:58:18,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:58:18,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 10:58:18,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2013, Unknown=2, NotChecked=0, Total=2162 [2020-07-20 10:58:18,743 INFO L87 Difference]: Start difference. First operand 80 states and 108 transitions. Second operand 24 states. [2020-07-20 10:58:21,657 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-20 10:58:22,287 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-20 10:58:22,681 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:58:23,205 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:58:23,644 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:58:24,274 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:58:24,681 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:58:25,083 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:58:25,503 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:58:26,039 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:58:26,430 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:58:26,963 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:58:29,392 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:58:29,937 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:58:30,329 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:58:31,718 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-20 10:58:32,371 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-20 10:58:32,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:58:32,375 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2020-07-20 10:58:32,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 10:58:32,375 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 100 [2020-07-20 10:58:32,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:58:32,376 INFO L225 Difference]: With dead ends: 90 [2020-07-20 10:58:32,376 INFO L226 Difference]: Without dead ends: 86 [2020-07-20 10:58:32,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 97 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=434, Invalid=3722, Unknown=4, NotChecked=0, Total=4160 [2020-07-20 10:58:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-20 10:58:32,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2020-07-20 10:58:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 10:58:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 108 transitions. [2020-07-20 10:58:32,384 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 108 transitions. Word has length 100 [2020-07-20 10:58:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:58:32,385 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 108 transitions. [2020-07-20 10:58:32,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 10:58:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 108 transitions. [2020-07-20 10:58:32,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-20 10:58:32,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:58:32,386 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:58:32,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:58:32,600 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:58:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:58:32,600 INFO L82 PathProgramCache]: Analyzing trace with hash -970320905, now seen corresponding path program 20 times [2020-07-20 10:58:32,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:58:32,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749473709] [2020-07-20 10:58:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:58:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:58:32,785 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-20 10:58:32,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:58:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 10 proven. 410 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2020-07-20 10:58:38,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:58:39,201 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:58:39,551 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:39,913 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:40,267 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:40,621 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:40,975 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:41,344 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:41,697 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:42,053 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:42,638 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:58:43,718 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:58:44,071 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:44,426 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:44,785 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:45,145 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:45,505 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:45,866 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:46,223 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:46,843 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:58:46,844 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:58:47,878 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:58:48,240 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:48,598 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:48,954 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:49,318 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:49,678 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:50,035 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:50,671 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:58:50,672 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:58:51,931 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:58:52,292 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:52,651 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:53,014 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:53,383 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:53,742 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:54,442 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:58:54,443 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:58:55,497 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:58:55,864 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:56,226 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:56,587 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:56,952 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:57,623 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:58:57,624 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:58:57,624 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:58:57,624 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:58:58,874 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:58:59,238 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:59,597 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:58:59,955 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:59:00,630 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:59:00,631 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:59:01,861 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:59:02,223 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:59:02,583 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:59:03,272 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:59:03,273 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:59:04,368 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:59:04,726 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:59:05,429 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:59:05,429 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:59:05,430 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:59:05,430 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:59:06,534 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:59:07,247 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:59:07,247 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:59:08,796 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:59:08,796 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:59:09,950 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:59:09,951 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 10:59:12,135 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:59:12,499 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:59:12,856 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:59:13,215 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:59:15,113 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:59:15,471 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:59:15,831 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:59:16,695 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 10:59:16,701 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 10:59:16,702 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:59:17,659 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 10:59:18,544 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:59:19,039 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:59:19,251 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:59:19,379 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:59:19,566 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:59:19,786 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:59:19,920 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:59:20,112 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:59:20,336 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:59:20,469 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:59:21,427 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:59:21,432 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:59:21,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:59:21,433 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:59:21,434 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 10:59:22,920 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-07-20 10:59:24,255 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 10:59:24,405 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:59:24,619 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:59:24,750 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:59:24,941 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:59:25,161 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:59:25,296 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:59:26,324 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 10:59:26,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749473709] [2020-07-20 10:59:26,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:59:26,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-07-20 10:59:26,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759694796] [2020-07-20 10:59:26,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 10:59:26,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:59:26,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 10:59:26,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=3940, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 10:59:26,330 INFO L87 Difference]: Start difference. First operand 80 states and 108 transitions. Second operand 30 states. [2020-07-20 10:59:28,017 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-20 10:59:29,203 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-20 10:59:29,979 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:59:30,733 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 10:59:31,758 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:59:32,741 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:59:33,755 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:59:34,528 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:59:35,307 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:59:36,091 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:59:37,106 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:59:37,883 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:59:38,875 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:59:40,033 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:59:41,022 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:59:41,803 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:59:42,796 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:59:43,580 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:59:44,374 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:59:44,903 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 10:59:45,563 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 10:59:46,814 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-07-20 10:59:47,518 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-07-20 10:59:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:59:47,860 INFO L93 Difference]: Finished difference Result 93 states and 129 transitions. [2020-07-20 10:59:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 10:59:47,869 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 128 [2020-07-20 10:59:47,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:59:47,870 INFO L225 Difference]: With dead ends: 93 [2020-07-20 10:59:47,870 INFO L226 Difference]: Without dead ends: 89 [2020-07-20 10:59:47,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 141 SyntacticMatches, 16 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=749, Invalid=7083, Unknown=0, NotChecked=0, Total=7832 [2020-07-20 10:59:47,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-20 10:59:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-07-20 10:59:47,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 10:59:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 122 transitions. [2020-07-20 10:59:47,880 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 122 transitions. Word has length 128 [2020-07-20 10:59:47,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:59:47,880 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 122 transitions. [2020-07-20 10:59:47,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 10:59:47,881 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 122 transitions. [2020-07-20 10:59:47,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 10:59:47,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:59:47,882 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:59:48,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:59:48,096 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:59:48,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:59:48,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1081659784, now seen corresponding path program 21 times [2020-07-20 10:59:48,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:59:48,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33593071] [2020-07-20 10:59:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:59:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:59:48,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-20 10:59:48,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:59:55,397 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:59:56,013 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:59:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 10 proven. 460 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-07-20 10:59:56,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:59:57,064 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 10:59:57,169 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 10:59:57,323 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 10:59:57,531 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:59:57,662 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 10:59:57,854 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 10:59:58,081 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:59:58,215 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:59:58,408 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:59:58,626 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:59:58,762 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:59:58,952 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:59:59,168 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:59:59,302 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:59:59,493 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 10:59:59,717 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 10:59:59,843 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:00:00,036 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:00,258 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:00:00,393 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:00:00,575 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:00,799 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:00:00,934 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:00:01,125 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:01,348 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:00:01,488 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:00:01,679 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:01,902 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:00:02,037 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:00:02,228 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:02,456 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 11:00:02,583 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 11:00:03,132 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:03,911 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 11:00:04,020 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 11:00:04,174 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 11:00:04,392 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 11:00:04,521 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 11:00:04,710 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:00:04,929 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:00:05,060 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:00:05,239 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:05,468 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:00:05,685 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:06,058 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:06,430 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:06,794 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:07,156 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:07,519 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:08,166 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:08,166 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:08,167 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:08,168 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:08,872 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 11:00:09,224 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:00:09,583 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:09,950 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:10,318 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:10,676 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:11,038 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:11,401 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:12,052 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:12,052 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:12,053 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:12,053 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:13,341 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:00:13,703 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:14,075 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:14,445 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:14,812 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:15,176 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:15,842 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:15,843 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:15,843 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:15,844 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:16,911 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:00:17,274 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:17,640 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:18,011 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:18,369 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:19,031 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:19,031 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 11:00:19,953 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 11:00:20,323 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:00:20,694 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:21,069 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:21,451 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:22,099 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:22,100 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:22,100 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:22,100 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:23,005 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 11:00:23,372 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:00:23,747 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:24,131 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:24,843 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:24,844 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 11:00:25,615 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 11:00:25,957 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:00:26,316 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:27,054 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:27,055 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:27,056 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:27,056 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:28,170 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:00:28,877 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:28,878 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 11:00:29,761 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 11:00:30,492 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:30,492 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:30,493 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:30,493 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:31,618 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:31,619 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 11:00:33,772 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:00:34,124 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:34,498 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:34,836 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:35,202 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:37,099 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:00:37,458 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:37,808 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:38,157 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:38,931 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 11:00:38,932 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 11:00:40,838 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:00:41,208 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:41,558 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:42,466 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:00:42,469 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:42,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:42,470 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:42,471 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:00:43,283 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-07-20 11:00:46,668 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:00:47,030 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:00:47,986 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 11:00:47,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33593071] [2020-07-20 11:00:47,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 11:00:47,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-07-20 11:00:47,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801860437] [2020-07-20 11:00:47,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 11:00:47,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:47,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 11:00:47,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=3940, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 11:00:47,991 INFO L87 Difference]: Start difference. First operand 85 states and 122 transitions. Second operand 30 states. [2020-07-20 11:00:49,145 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-20 11:00:49,951 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-20 11:00:50,483 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 11:00:50,953 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-20 11:00:51,635 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 11:00:52,284 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 11:00:52,950 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 11:00:53,439 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 11:00:53,949 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 11:00:54,458 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 11:00:55,156 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 11:00:55,709 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 11:00:56,396 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 11:00:56,925 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 11:00:57,572 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 11:00:58,378 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 11:00:59,066 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 11:00:59,615 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 11:01:00,310 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 11:01:00,844 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-20 11:01:01,533 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-20 11:01:02,857 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-20 11:01:03,709 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-20 11:01:04,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:01:04,063 INFO L93 Difference]: Finished difference Result 95 states and 132 transitions. [2020-07-20 11:01:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 11:01:04,073 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 135 [2020-07-20 11:01:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:01:04,074 INFO L225 Difference]: With dead ends: 95 [2020-07-20 11:01:04,075 INFO L226 Difference]: Without dead ends: 91 [2020-07-20 11:01:04,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 146 SyntacticMatches, 18 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=749, Invalid=7083, Unknown=0, NotChecked=0, Total=7832 [2020-07-20 11:01:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-20 11:01:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2020-07-20 11:01:04,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 11:01:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 122 transitions. [2020-07-20 11:01:04,084 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 122 transitions. Word has length 135 [2020-07-20 11:01:04,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:01:04,085 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 122 transitions. [2020-07-20 11:01:04,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 11:01:04,085 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 122 transitions. [2020-07-20 11:01:04,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 11:01:04,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:01:04,086 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:01:04,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:01:04,302 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:01:04,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:01:04,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1602926209, now seen corresponding path program 22 times [2020-07-20 11:01:04,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:01:04,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574266472] [2020-07-20 11:01:04,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:01:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:01:04,528 WARN L261 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2020-07-20 11:01:04,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:01:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 10 proven. 513 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2020-07-20 11:01:10,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:01:11,306 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:01:11,703 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:12,076 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:12,446 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:12,631 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:12,766 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:12,916 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:13,300 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:13,678 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:14,047 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:14,434 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:15,083 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:01:15,795 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 11:01:15,979 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 11:01:16,104 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 11:01:16,285 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:01:16,496 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:16,625 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:16,810 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:17,025 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:17,154 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:17,337 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:17,535 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:17,662 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:17,845 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:18,056 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:18,180 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:18,365 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:18,579 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:18,708 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:18,892 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:19,122 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:19,265 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:19,459 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:19,681 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:19,812 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:20,007 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:20,234 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:20,367 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:21,013 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 11:01:21,019 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:01:21,020 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 11:01:22,057 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 11:01:22,267 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 11:01:22,404 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 11:01:22,604 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:01:22,839 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:22,971 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:23,153 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:23,368 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:23,501 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:23,694 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:23,919 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:24,054 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:24,253 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:24,544 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:24,671 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:24,854 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:25,062 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:25,189 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:25,369 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:25,589 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:25,719 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:25,903 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:26,116 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:26,245 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:26,840 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 11:01:26,845 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:01:26,846 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 11:01:28,200 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 11:01:28,402 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 11:01:28,523 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 11:01:28,703 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:01:28,910 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:29,040 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:29,227 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:29,448 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:29,579 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:29,765 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:29,983 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:30,113 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:30,298 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:30,513 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:30,673 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:30,892 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:31,114 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:31,247 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:31,434 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:31,647 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:31,781 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:32,261 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:01:32,262 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 11:01:33,154 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 11:01:33,551 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:01:33,944 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:34,333 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:34,507 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:34,618 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:34,766 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:35,035 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:35,186 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:35,864 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:01:35,865 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:01:35,865 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:01:35,865 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:01:37,174 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:01:37,521 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:37,880 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:38,269 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:38,458 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:38,564 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:39,014 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:01:39,015 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 11:01:39,906 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 11:01:40,250 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:01:40,637 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:40,913 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:41,055 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:41,343 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:41,949 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 11:01:41,954 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:01:41,955 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:01:41,955 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:01:41,956 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:01:42,786 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 11:01:42,895 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 11:01:43,078 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 11:01:43,183 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 11:01:43,340 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 11:01:43,454 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 11:01:43,635 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 11:01:43,867 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:44,003 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:44,183 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:01:44,399 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:44,539 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 11:01:45,235 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 11:01:45,240 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 11:01:45,241 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts