/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:16:27,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:16:27,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:16:27,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:16:27,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:16:27,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:16:27,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:16:27,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:16:27,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:16:27,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:16:27,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:16:27,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:16:27,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:16:27,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:16:27,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:16:27,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:16:27,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:16:27,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:16:27,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:16:27,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:16:27,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:16:27,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:16:27,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:16:27,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:16:27,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:16:27,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:16:27,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:16:27,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:16:27,935 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 19:16:27,972 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:16:27,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:16:27,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:16:27,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:16:27,975 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:16:27,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:16:27,976 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:16:27,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:16:27,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:16:27,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:16:27,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:16:27,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:16:27,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:16:27,977 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:16:27,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:16:27,977 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:16:27,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:16:27,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:16:27,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:16:27,978 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:16:27,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:16:27,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:16:27,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:16:27,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:16:27,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:16:27,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:16:27,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:27,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:16:27,981 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:16:27,981 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 19:16:28,272 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:16:28,289 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:16:28,293 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:16:28,294 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:16:28,294 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:16:28,295 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci03.c [2020-07-21 19:16:28,369 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27b08a385/a2e1ece81e2c48ddb3a13a5207ef6fe9/FLAGf643b8cef [2020-07-21 19:16:28,860 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:16:28,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci03.c [2020-07-21 19:16:28,867 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27b08a385/a2e1ece81e2c48ddb3a13a5207ef6fe9/FLAGf643b8cef [2020-07-21 19:16:29,228 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27b08a385/a2e1ece81e2c48ddb3a13a5207ef6fe9 [2020-07-21 19:16:29,238 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:16:29,241 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:16:29,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:16:29,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:16:29,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:16:29,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:16:29" (1/1) ... [2020-07-21 19:16:29,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea389f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:29, skipping insertion in model container [2020-07-21 19:16:29,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:16:29" (1/1) ... [2020-07-21 19:16:29,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:16:29,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:16:29,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:16:29,426 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:16:29,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:16:29,452 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:16:29,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:29 WrapperNode [2020-07-21 19:16:29,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:16:29,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:16:29,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:16:29,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:16:29,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:29" (1/1) ... [2020-07-21 19:16:29,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:29" (1/1) ... [2020-07-21 19:16:29,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:29" (1/1) ... [2020-07-21 19:16:29,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:29" (1/1) ... [2020-07-21 19:16:29,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:29" (1/1) ... [2020-07-21 19:16:29,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:29" (1/1) ... [2020-07-21 19:16:29,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:29" (1/1) ... [2020-07-21 19:16:29,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:16:29,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:16:29,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:16:29,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:16:29,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:29" (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 [2020-07-21 19:16:29,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:16:29,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:16:29,624 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-21 19:16:29,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:16:29,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:16:29,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:16:29,625 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-21 19:16:29,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:16:29,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:16:29,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:16:29,820 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:16:29,821 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:16:29,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:16:29 BoogieIcfgContainer [2020-07-21 19:16:29,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:16:29,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:16:29,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:16:29,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:16:29,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:16:29" (1/3) ... [2020-07-21 19:16:29,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3009230f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:16:29, skipping insertion in model container [2020-07-21 19:16:29,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:29" (2/3) ... [2020-07-21 19:16:29,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3009230f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:16:29, skipping insertion in model container [2020-07-21 19:16:29,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:16:29" (3/3) ... [2020-07-21 19:16:29,850 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci03.c [2020-07-21 19:16:29,865 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:16:29,873 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:16:29,919 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:16:29,961 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:16:29,961 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:16:29,963 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:16:29,963 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:16:29,963 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:16:29,964 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:16:29,964 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:16:29,964 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:16:29,990 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 19:16:29,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 19:16:29,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:29,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:29,999 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:30,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:30,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-07-21 19:16:30,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:30,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849036743] [2020-07-21 19:16:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:30,069 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:16:30,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:30,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:16:30,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:16:30,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:16:30,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849036743] [2020-07-21 19:16:30,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:16:30,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:16:30,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857360137] [2020-07-21 19:16:30,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:16:30,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:30,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:16:30,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:16:30,190 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 19:16:30,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:30,318 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-21 19:16:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:16:30,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 19:16:30,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:30,331 INFO L225 Difference]: With dead ends: 36 [2020-07-21 19:16:30,331 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 19:16:30,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:16:30,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 19:16:30,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 19:16:30,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 19:16:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 19:16:30,383 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-07-21 19:16:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:30,384 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 19:16:30,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:16:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 19:16:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 19:16:30,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:30,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:30,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:30,601 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:30,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:30,603 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2020-07-21 19:16:30,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:30,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768146513] [2020-07-21 19:16:30,604 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:30,629 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:16:30,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:30,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:16:30,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:16:30,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:16:30,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768146513] [2020-07-21 19:16:30,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:16:30,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:16:30,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287731271] [2020-07-21 19:16:30,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:16:30,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:30,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:16:30,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:16:30,672 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2020-07-21 19:16:30,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:30,776 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-07-21 19:16:30,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:16:30,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 19:16:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:30,781 INFO L225 Difference]: With dead ends: 28 [2020-07-21 19:16:30,781 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 19:16:30,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:16:30,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 19:16:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-07-21 19:16:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 19:16:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 19:16:30,799 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-07-21 19:16:30,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:30,801 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 19:16:30,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:16:30,801 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 19:16:30,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 19:16:30,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:30,805 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:31,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:31,020 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:31,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:31,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-07-21 19:16:31,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:31,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881420487] [2020-07-21 19:16:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:31,059 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:31,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:31,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:16:31,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 19:16:31,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:31,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:31,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 19:16:31,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881420487] [2020-07-21 19:16:31,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:31,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-07-21 19:16:31,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043392365] [2020-07-21 19:16:31,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 19:16:31,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:31,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 19:16:31,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:16:31,387 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 10 states. [2020-07-21 19:16:31,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:31,552 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2020-07-21 19:16:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:16:31,553 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 19:16:31,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:31,557 INFO L225 Difference]: With dead ends: 40 [2020-07-21 19:16:31,557 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 19:16:31,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:16:31,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 19:16:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-21 19:16:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 19:16:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2020-07-21 19:16:31,585 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 27 [2020-07-21 19:16:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:31,585 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2020-07-21 19:16:31,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 19:16:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2020-07-21 19:16:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 19:16:31,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:31,593 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:31,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:31,808 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:31,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1554048393, now seen corresponding path program 1 times [2020-07-21 19:16:31,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:31,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915598073] [2020-07-21 19:16:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:31,858 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:31,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:31,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:16:31,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-07-21 19:16:31,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:32,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:32,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:32,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 19:16:32,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915598073] [2020-07-21 19:16:32,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:32,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2020-07-21 19:16:32,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975098575] [2020-07-21 19:16:32,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 19:16:32,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:32,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 19:16:32,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:16:32,268 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2020-07-21 19:16:32,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:32,504 INFO L93 Difference]: Finished difference Result 58 states and 115 transitions. [2020-07-21 19:16:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:16:32,505 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-07-21 19:16:32,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:32,509 INFO L225 Difference]: With dead ends: 58 [2020-07-21 19:16:32,509 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 19:16:32,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-07-21 19:16:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 19:16:32,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2020-07-21 19:16:32,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 19:16:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 59 transitions. [2020-07-21 19:16:32,527 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 59 transitions. Word has length 55 [2020-07-21 19:16:32,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:32,528 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 59 transitions. [2020-07-21 19:16:32,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 19:16:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 59 transitions. [2020-07-21 19:16:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-21 19:16:32,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:32,536 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:32,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:32,742 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:32,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:32,743 INFO L82 PathProgramCache]: Analyzing trace with hash 433565041, now seen corresponding path program 2 times [2020-07-21 19:16:32,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:32,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586603517] [2020-07-21 19:16:32,745 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:32,857 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:32,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:32,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:16:32,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 69 proven. 379 refuted. 0 times theorem prover too weak. 839 trivial. 0 not checked. [2020-07-21 19:16:32,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:33,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:33,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:34,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:34,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:34,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:34,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 69 proven. 401 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2020-07-21 19:16:34,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586603517] [2020-07-21 19:16:34,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:34,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 16 [2020-07-21 19:16:34,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632121589] [2020-07-21 19:16:34,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 19:16:34,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:34,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 19:16:34,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-07-21 19:16:34,149 INFO L87 Difference]: Start difference. First operand 37 states and 59 transitions. Second operand 16 states. [2020-07-21 19:16:34,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:34,510 INFO L93 Difference]: Finished difference Result 73 states and 184 transitions. [2020-07-21 19:16:34,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:16:34,512 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 157 [2020-07-21 19:16:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:34,517 INFO L225 Difference]: With dead ends: 73 [2020-07-21 19:16:34,517 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 19:16:34,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 291 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:16:34,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 19:16:34,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2020-07-21 19:16:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 19:16:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 91 transitions. [2020-07-21 19:16:34,554 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 91 transitions. Word has length 157 [2020-07-21 19:16:34,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:34,555 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 91 transitions. [2020-07-21 19:16:34,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 19:16:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 91 transitions. [2020-07-21 19:16:34,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-07-21 19:16:34,568 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:34,569 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 29, 17, 17, 17, 17, 17, 17, 17, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:34,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:34,785 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:34,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1759711241, now seen corresponding path program 2 times [2020-07-21 19:16:34,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:34,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627152037] [2020-07-21 19:16:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:34,930 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:34,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:34,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:16:34,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 132 proven. 828 refuted. 0 times theorem prover too weak. 2370 trivial. 0 not checked. [2020-07-21 19:16:35,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:36,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:36,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:36,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:36,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:36,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:36,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 132 proven. 868 refuted. 0 times theorem prover too weak. 2330 trivial. 0 not checked. [2020-07-21 19:16:36,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627152037] [2020-07-21 19:16:36,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:36,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 18 [2020-07-21 19:16:36,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250635359] [2020-07-21 19:16:36,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 19:16:36,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:36,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 19:16:36,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:16:36,854 INFO L87 Difference]: Start difference. First operand 47 states and 91 transitions. Second operand 18 states. [2020-07-21 19:16:37,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:37,326 INFO L93 Difference]: Finished difference Result 88 states and 271 transitions. [2020-07-21 19:16:37,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:16:37,327 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 247 [2020-07-21 19:16:37,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:37,333 INFO L225 Difference]: With dead ends: 88 [2020-07-21 19:16:37,333 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 19:16:37,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 466 SyntacticMatches, 11 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:16:37,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 19:16:37,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-07-21 19:16:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 19:16:37,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 110 transitions. [2020-07-21 19:16:37,358 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 110 transitions. Word has length 247 [2020-07-21 19:16:37,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:37,359 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 110 transitions. [2020-07-21 19:16:37,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 19:16:37,360 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 110 transitions. [2020-07-21 19:16:37,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1172 [2020-07-21 19:16:37,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:37,427 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 90, 89, 89, 89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:37,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:37,641 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:37,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:37,642 INFO L82 PathProgramCache]: Analyzing trace with hash 396575871, now seen corresponding path program 3 times [2020-07-21 19:16:37,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:37,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953864925] [2020-07-21 19:16:37,643 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:38,078 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:38,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:38,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 2615 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:16:38,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:38,788 INFO L134 CoverageAnalysis]: Checked inductivity of 83304 backedges. 991 proven. 6102 refuted. 0 times theorem prover too weak. 76211 trivial. 0 not checked. [2020-07-21 19:16:38,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:42,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:43,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:44,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:44,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:44,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:44,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:44,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:45,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:45,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:45,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:45,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 83304 backedges. 991 proven. 6172 refuted. 0 times theorem prover too weak. 76141 trivial. 0 not checked. [2020-07-21 19:16:45,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953864925] [2020-07-21 19:16:45,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:45,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 22 [2020-07-21 19:16:45,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058430631] [2020-07-21 19:16:45,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 19:16:45,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:45,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 19:16:45,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:16:45,643 INFO L87 Difference]: Start difference. First operand 52 states and 110 transitions. Second operand 22 states. [2020-07-21 19:16:46,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:46,165 INFO L93 Difference]: Finished difference Result 103 states and 376 transitions. [2020-07-21 19:16:46,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:16:46,165 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1171 [2020-07-21 19:16:46,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:46,173 INFO L225 Difference]: With dead ends: 103 [2020-07-21 19:16:46,174 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 19:16:46,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2351 GetRequests, 2307 SyntacticMatches, 15 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=627, Unknown=0, NotChecked=0, Total=930 [2020-07-21 19:16:46,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 19:16:46,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 62. [2020-07-21 19:16:46,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 19:16:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 154 transitions. [2020-07-21 19:16:46,198 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 154 transitions. Word has length 1171 [2020-07-21 19:16:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:46,200 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 154 transitions. [2020-07-21 19:16:46,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 19:16:46,201 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 154 transitions. [2020-07-21 19:16:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1796 [2020-07-21 19:16:46,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:46,261 INFO L422 BasicCegarLoop]: trace histogram [263, 263, 209, 131, 131, 131, 131, 131, 131, 131, 78, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:46,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:46,475 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:46,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:46,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1095714831, now seen corresponding path program 3 times [2020-07-21 19:16:46,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:46,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554160844] [2020-07-21 19:16:46,479 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:47,034 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:47,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:47,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 3989 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:16:47,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 193608 backedges. 31016 proven. 418 refuted. 0 times theorem prover too weak. 162174 trivial. 0 not checked. [2020-07-21 19:16:48,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:55,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:55,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:55,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:55,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:56,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:56,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:56,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:56,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:56,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 193608 backedges. 1796 proven. 13893 refuted. 0 times theorem prover too weak. 177919 trivial. 0 not checked. [2020-07-21 19:16:57,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554160844] [2020-07-21 19:16:57,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:57,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:16:57,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579053095] [2020-07-21 19:16:57,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:16:57,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:57,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:16:57,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:16:57,693 INFO L87 Difference]: Start difference. First operand 62 states and 154 transitions. Second operand 21 states. [2020-07-21 19:16:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:58,208 INFO L93 Difference]: Finished difference Result 135 states and 390 transitions. [2020-07-21 19:16:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 19:16:58,211 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1795 [2020-07-21 19:16:58,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:58,213 INFO L225 Difference]: With dead ends: 135 [2020-07-21 19:16:58,213 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 19:16:58,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3605 GetRequests, 3553 SyntacticMatches, 17 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 19:16:58,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 19:16:58,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-07-21 19:16:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 19:16:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 123 transitions. [2020-07-21 19:16:58,231 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 123 transitions. Word has length 1795 [2020-07-21 19:16:58,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:58,233 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 123 transitions. [2020-07-21 19:16:58,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:16:58,233 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 123 transitions. [2020-07-21 19:16:58,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1010 [2020-07-21 19:16:58,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:58,248 INFO L422 BasicCegarLoop]: trace histogram [147, 147, 119, 73, 73, 73, 73, 73, 73, 73, 46, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:58,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:58,463 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:58,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2114371631, now seen corresponding path program 4 times [2020-07-21 19:16:58,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:58,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298411745] [2020-07-21 19:16:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:58,826 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:58,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:58,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 2243 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 19:16:58,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 60457 backedges. 27596 proven. 1596 refuted. 0 times theorem prover too weak. 31265 trivial. 0 not checked. [2020-07-21 19:16:59,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:04,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:04,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:05,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:05,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:05,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:05,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:05,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:05,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:06,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:06,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:06,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:06,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:06,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:06,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 60457 backedges. 1682 proven. 8762 refuted. 0 times theorem prover too weak. 50013 trivial. 0 not checked. [2020-07-21 19:17:07,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298411745] [2020-07-21 19:17:07,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:07,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-21 19:17:07,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480651903] [2020-07-21 19:17:07,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 19:17:07,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:07,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 19:17:07,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:17:07,287 INFO L87 Difference]: Start difference. First operand 80 states and 123 transitions. Second operand 29 states. [2020-07-21 19:17:08,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:08,361 INFO L93 Difference]: Finished difference Result 189 states and 388 transitions. [2020-07-21 19:17:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 19:17:08,362 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 1009 [2020-07-21 19:17:08,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:08,367 INFO L225 Difference]: With dead ends: 189 [2020-07-21 19:17:08,367 INFO L226 Difference]: Without dead ends: 118 [2020-07-21 19:17:08,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2043 GetRequests, 1965 SyntacticMatches, 25 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 19:17:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-21 19:17:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2020-07-21 19:17:08,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-21 19:17:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 150 transitions. [2020-07-21 19:17:08,386 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 150 transitions. Word has length 1009 [2020-07-21 19:17:08,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:08,387 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 150 transitions. [2020-07-21 19:17:08,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 19:17:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 150 transitions. [2020-07-21 19:17:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2020-07-21 19:17:08,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:08,398 INFO L422 BasicCegarLoop]: trace histogram [135, 135, 109, 67, 67, 67, 67, 67, 67, 67, 42, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:08,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:08,611 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:08,612 INFO L82 PathProgramCache]: Analyzing trace with hash 838202223, now seen corresponding path program 5 times [2020-07-21 19:17:08,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:08,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956932676] [2020-07-21 19:17:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:09,019 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:09,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:09,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-21 19:17:09,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 4043 proven. 7419 refuted. 0 times theorem prover too weak. 39448 trivial. 0 not checked. [2020-07-21 19:17:09,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:13,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:14,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:14,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:14,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:14,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:15,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:15,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:15,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:15,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:17,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:18,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:18,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:19,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:19,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:19,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:19,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:19,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:19,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:19,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 4043 proven. 7566 refuted. 0 times theorem prover too weak. 39301 trivial. 0 not checked. [2020-07-21 19:17:19,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956932676] [2020-07-21 19:17:19,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:19,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 35] total 37 [2020-07-21 19:17:19,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438153366] [2020-07-21 19:17:19,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-21 19:17:19,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:19,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-21 19:17:19,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 19:17:19,897 INFO L87 Difference]: Start difference. First operand 104 states and 150 transitions. Second operand 37 states. [2020-07-21 19:17:21,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:21,604 INFO L93 Difference]: Finished difference Result 258 states and 499 transitions. [2020-07-21 19:17:21,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-21 19:17:21,605 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 927 [2020-07-21 19:17:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:21,610 INFO L225 Difference]: With dead ends: 258 [2020-07-21 19:17:21,610 INFO L226 Difference]: Without dead ends: 163 [2020-07-21 19:17:21,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1889 GetRequests, 1785 SyntacticMatches, 33 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1259, Invalid=3997, Unknown=0, NotChecked=0, Total=5256 [2020-07-21 19:17:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-21 19:17:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 130. [2020-07-21 19:17:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-21 19:17:21,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 187 transitions. [2020-07-21 19:17:21,630 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 187 transitions. Word has length 927 [2020-07-21 19:17:21,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:21,634 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 187 transitions. [2020-07-21 19:17:21,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-21 19:17:21,634 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 187 transitions. [2020-07-21 19:17:21,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 19:17:21,640 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:21,640 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:21,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:21,854 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:21,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:21,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1020040988, now seen corresponding path program 6 times [2020-07-21 19:17:21,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:21,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600639337] [2020-07-21 19:17:21,855 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:22,264 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:22,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:22,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 220 conjunts are in the unsatisfiable core [2020-07-21 19:17:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 19:17:23,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:24,765 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:17:24,953 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:17:25,151 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:17:25,344 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:17:26,734 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 19:17:27,151 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 19:17:27,574 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 19:17:27,997 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 19:17:29,658 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:17:29,877 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:17:30,097 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:17:30,300 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:17:31,298 WARN L193 SmtUtils]: Spent 991.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 19:17:32,299 WARN L193 SmtUtils]: Spent 994.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 19:17:33,331 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 19:17:34,368 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 19:17:35,152 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:17:35,254 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:17:35,363 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:17:35,469 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:17:36,174 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:17:36,387 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:17:36,607 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:17:36,821 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:17:37,615 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:17:37,719 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:17:37,830 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:17:37,942 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:17:38,411 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 19:17:38,938 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 19:17:39,405 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 19:17:39,883 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 19:17:42,567 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification that was a NOOP. DAG size: 491 [2020-07-21 19:17:45,260 WARN L193 SmtUtils]: Spent 2.68 s on a formula simplification that was a NOOP. DAG size: 491 [2020-07-21 19:17:48,025 WARN L193 SmtUtils]: Spent 2.75 s on a formula simplification that was a NOOP. DAG size: 493 [2020-07-21 19:17:50,793 WARN L193 SmtUtils]: Spent 2.76 s on a formula simplification that was a NOOP. DAG size: 493 [2020-07-21 19:17:51,989 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:17:52,110 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:17:52,242 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:17:52,370 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:17:53,242 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:17:53,506 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:17:53,774 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:17:54,040 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:17:55,059 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:17:55,182 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:17:55,316 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:17:55,450 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:17:55,979 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 19:17:56,503 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 19:17:57,036 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 19:17:57,589 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 19:17:58,277 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 269 [2020-07-21 19:17:58,820 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-07-21 19:17:59,355 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-07-21 19:17:59,873 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-07-21 19:18:00,402 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-07-21 19:18:00,925 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2020-07-21 19:18:01,443 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-07-21 19:18:01,950 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2020-07-21 19:18:02,450 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-07-21 19:18:02,939 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-07-21 19:18:03,413 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-21 19:18:03,787 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-07-21 19:18:04,161 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-07-21 19:18:04,534 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-07-21 19:18:04,981 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-07-21 19:18:05,422 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-07-21 19:18:05,863 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-07-21 19:18:06,272 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-07-21 19:18:06,682 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-07-21 19:18:07,078 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-07-21 19:18:07,461 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-07-21 19:18:07,831 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-07-21 19:18:08,200 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-07-21 19:18:08,555 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-07-21 19:18:08,905 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-21 19:18:09,255 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-07-21 19:18:09,586 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-07-21 19:18:09,909 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-07-21 19:18:10,268 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-07-21 19:18:10,567 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-07-21 19:18:10,868 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-07-21 19:18:11,167 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-07-21 19:18:11,459 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-07-21 19:18:11,736 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-07-21 19:18:12,003 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-07-21 19:18:12,273 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-21 19:18:12,534 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 19:18:12,777 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-21 19:18:13,018 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-07-21 19:18:13,256 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 19:18:13,483 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-07-21 19:18:13,705 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-07-21 19:18:13,926 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 19:18:14,135 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-21 19:18:14,338 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-21 19:18:14,529 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-07-21 19:18:14,736 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-07-21 19:18:14,918 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-07-21 19:18:15,092 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-07-21 19:18:15,256 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-07-21 19:18:15,428 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 19:18:15,591 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 19:18:15,738 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 19:18:15,886 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 19:18:16,029 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 19:18:16,164 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 19:18:16,286 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 19:18:16,413 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 19:18:16,532 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 19:18:16,644 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 19:18:16,755 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:18:16,858 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:18:19,096 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:18:19,252 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:18:19,419 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:18:19,577 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:18:19,742 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 19:18:19,895 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 19:18:20,043 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 19:18:20,184 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 19:18:20,317 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 19:18:20,446 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-21 19:18:20,563 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 19:18:20,684 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 19:18:20,793 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 19:18:20,899 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:18:25,740 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:18:25,843 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:18:26,365 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:18:26,512 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:18:26,669 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:18:26,825 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:18:27,956 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:18:28,236 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:18:28,529 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:18:28,829 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:18:29,828 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:18:32,134 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:18:32,982 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:18:33,157 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:18:33,333 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:18:33,510 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:18:37,962 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:18:38,119 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:18:38,284 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:18:38,441 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:18:39,646 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:18:39,945 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:18:40,245 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:18:40,549 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:18:41,961 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:18:42,118 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:18:42,281 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:18:42,441 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:18:43,040 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 19:18:43,638 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 19:18:44,260 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 19:18:44,922 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 19:18:45,941 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:18:46,565 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:18:46,742 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:18:46,924 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:18:47,103 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:18:48,434 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:18:48,747 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:18:49,081 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:18:49,414 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:18:50,862 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 19:18:52,210 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 19:18:53,783 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 19:18:55,213 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 19:18:56,310 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:18:56,420 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:18:57,083 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:18:57,277 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:18:57,480 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:18:57,671 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:18:58,496 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:18:58,713 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:18:58,821 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:18:59,172 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:18:59,521 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:18:59,875 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:19:00,232 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:19:00,591 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-07-21 19:19:00,945 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-21 19:19:01,278 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-07-21 19:19:01,600 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-07-21 19:19:01,928 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-21 19:19:02,244 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-21 19:19:02,542 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-21 19:19:02,830 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-07-21 19:19:03,119 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-21 19:19:03,382 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-07-21 19:19:03,666 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 19:19:03,926 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-07-21 19:19:04,180 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 19:19:04,424 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-07-21 19:19:04,658 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-07-21 19:19:04,875 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:19:05,090 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-07-21 19:19:05,297 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-21 19:19:05,497 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-07-21 19:19:05,695 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 19:19:05,893 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 19:19:06,075 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-21 19:19:06,254 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 19:19:06,420 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 19:19:06,629 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-21 19:19:06,783 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 19:19:06,943 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-21 19:19:07,091 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 19:19:07,227 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:19:07,356 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:19:07,479 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-21 19:19:07,594 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 19:19:07,705 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 19:19:07,818 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:19:09,463 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:09,568 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:09,682 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:09,801 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:09,922 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:19:10,038 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 19:19:10,140 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 19:19:12,807 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:13,015 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:13,121 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:13,798 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:19:13,978 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:19:14,169 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:19:14,360 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:19:16,165 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:16,370 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:16,473 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:18,711 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:18,823 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:18,942 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:19,061 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:19,781 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:19:19,977 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:19:20,185 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:19:20,384 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:19:21,231 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:21,345 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:21,462 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:21,578 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:21,943 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:19:22,297 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:19:22,686 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:19:23,065 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:19:23,928 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:24,033 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:24,150 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:24,263 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:24,952 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:19:25,135 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:19:25,330 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:19:25,527 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:19:26,229 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 19:19:26,968 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 19:19:27,759 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 19:19:28,537 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 19:19:29,547 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:29,672 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:29,802 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:29,929 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:30,677 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:19:30,880 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:19:31,083 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:19:31,347 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:19:31,558 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 19:19:31,751 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 19:19:31,940 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 19:19:32,121 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 19:19:32,297 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 19:19:32,463 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-21 19:19:32,623 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 19:19:32,780 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-21 19:19:32,934 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 19:19:33,086 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:19:33,220 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:19:33,346 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-21 19:19:33,471 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:19:33,594 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:19:33,703 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 19:19:36,453 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:36,572 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:36,696 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:36,818 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:39,273 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:39,384 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:39,520 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:39,638 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:40,380 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:19:40,580 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:19:40,791 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:19:41,017 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:19:41,979 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:42,100 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:42,228 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:42,358 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:42,753 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:19:43,154 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 19:19:43,561 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:19:43,958 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 19:19:44,970 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:45,097 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:45,216 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:45,339 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:45,465 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:19:45,584 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 19:19:45,696 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 19:19:48,798 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:48,914 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:49,045 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:49,171 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:49,970 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:19:50,175 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:19:50,396 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:19:50,625 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 19:19:52,912 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:53,029 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 19:19:53,158 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:53,285 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:19:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 19:19:55,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600639337] [2020-07-21 19:19:55,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:19:55,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-21 19:19:55,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111605818] [2020-07-21 19:19:55,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 19:19:55,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:19:55,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 19:19:55,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 19:19:55,249 INFO L87 Difference]: Start difference. First operand 130 states and 187 transitions. Second operand 36 states. [2020-07-21 19:19:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:19:56,172 INFO L93 Difference]: Finished difference Result 131 states and 188 transitions. [2020-07-21 19:19:56,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-21 19:19:56,178 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 750 [2020-07-21 19:19:56,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:19:56,179 INFO L225 Difference]: With dead ends: 131 [2020-07-21 19:19:56,180 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 19:19:56,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1500 GetRequests, 1301 SyntacticMatches, 164 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3509 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 19:19:56,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 19:19:56,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 19:19:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 19:19:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 19:19:56,183 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 750 [2020-07-21 19:19:56,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:19:56,183 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 19:19:56,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 19:19:56,183 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 19:19:56,183 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 19:19:56,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:19:56,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 19:19:57,932 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 8 [2020-07-21 19:19:59,937 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 123 DAG size of output: 46 [2020-07-21 19:19:59,944 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 19:19:59,944 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 19:19:59,944 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-21 19:19:59,944 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-21 19:19:59,945 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse2 (<= 8 |fibonacci_#in~n|)) (.cse3 (<= 1 |fibonacci_#t~ret0|)) (.cse0 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse1 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and .cse0 (<= |fibonacci_#in~n| 5) (<= 3 |fibonacci_#t~ret0|) (<= 5 |fibonacci_#in~n|) .cse1) (and .cse0 .cse2 (<= 21 |fibonacci_#t~ret0|) .cse1) (and .cse3 .cse0 (<= 2 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 2) .cse1) (and .cse0 (<= 8 |fibonacci_#t~ret0|) (<= fibonacci_~n 7) (<= 7 |fibonacci_#in~n|)) (and .cse0 (< |fibonacci_#in~n| 9) .cse2 .cse1 (<= 13 |fibonacci_#t~ret0|)) (and (<= 3 |fibonacci_#in~n|) .cse3 .cse0 (<= |fibonacci_#in~n| 3) .cse1) (and .cse0 (<= 2 |fibonacci_#t~ret0|) (<= 4 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 4) .cse1) (and (<= 5 |fibonacci_#t~ret0|) .cse0 (<= 6 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 6) .cse1))) [2020-07-21 19:19:59,945 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 19:19:59,945 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-21 19:19:59,945 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-21 19:19:59,945 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-21 19:19:59,945 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 19:19:59,945 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:19:59,945 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:19:59,945 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 19:19:59,945 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 19:19:59,946 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 19:19:59,946 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-07-21 19:19:59,946 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-07-21 19:19:59,946 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-07-21 19:19:59,946 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-07-21 19:19:59,946 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-07-21 19:19:59,946 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-07-21 19:19:59,947 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-07-21 19:19:59,947 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-07-21 19:19:59,947 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-07-21 19:19:59,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:19:59 BoogieIcfgContainer [2020-07-21 19:19:59,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:19:59,955 INFO L168 Benchmark]: Toolchain (without parser) took 210715.81 ms. Allocated memory was 145.8 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 102.2 MB in the beginning and 914.9 MB in the end (delta: -812.7 MB). Peak memory consumption was 718.2 MB. Max. memory is 7.1 GB. [2020-07-21 19:19:59,956 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 19:19:59,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 211.53 ms. Allocated memory is still 145.8 MB. Free memory was 102.0 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 19:19:59,956 INFO L168 Benchmark]: Boogie Preprocessor took 24.64 ms. Allocated memory is still 145.8 MB. Free memory was 92.6 MB in the beginning and 91.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 19:19:59,957 INFO L168 Benchmark]: RCFGBuilder took 348.91 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 91.2 MB in the beginning and 171.2 MB in the end (delta: -80.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 19:19:59,957 INFO L168 Benchmark]: TraceAbstraction took 210113.26 ms. Allocated memory was 203.4 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 171.2 MB in the beginning and 914.9 MB in the end (delta: -743.7 MB). Peak memory consumption was 729.5 MB. Max. memory is 7.1 GB. [2020-07-21 19:19:59,959 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 211.53 ms. Allocated memory is still 145.8 MB. Free memory was 102.0 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.64 ms. Allocated memory is still 145.8 MB. Free memory was 92.6 MB in the beginning and 91.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 348.91 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 91.2 MB in the beginning and 171.2 MB in the end (delta: -80.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 210113.26 ms. Allocated memory was 203.4 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 171.2 MB in the beginning and 914.9 MB in the end (delta: -743.7 MB). Peak memory consumption was 729.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 206.4s, OverallIterations: 11, TraceHistogramMax: 263, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 278 SDtfs, 1216 SDslu, 1599 SDs, 0 SdLazy, 2082 SolverSat, 2066 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12408 GetRequests, 11827 SyntacticMatches, 282 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6117 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 151 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 194 PreInvPairs, 314 NumberOfFragments, 139 HoareAnnotationTreeSize, 194 FomulaSimplifications, 7646 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2567 FormulaSimplificationTreeSizeReductionInter, 2.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 194.5s InterpolantComputationTime, 6167 NumberOfCodeBlocks, 6153 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 12285 ConstructedInterpolants, 0 QuantifiedInterpolants, 17827293 SizeOfPredicates, 80 NumberOfNonLiveVariables, 13714 ConjunctsInSsa, 364 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 787816/852220 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...