/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:18:07,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:18:07,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:18:07,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:18:07,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:18:07,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:18:07,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:18:07,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:18:07,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:18:07,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:18:07,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:18:07,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:18:07,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:18:07,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:18:07,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:18:07,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:18:07,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:18:07,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:18:08,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:18:08,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:18:08,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:18:08,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:18:08,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:18:08,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:18:08,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:18:08,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:18:08,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:18:08,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:18:08,020 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:18:08,034 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:18:08,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:18:08,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:18:08,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:18:08,036 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:18:08,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:18:08,037 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:18:08,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:18:08,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:18:08,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:18:08,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:18:08,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:18:08,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:18:08,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:18:08,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:18:08,040 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:18:08,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:18:08,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:18:08,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:18:08,041 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:18:08,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:18:08,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:18:08,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:18:08,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:18:08,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:18:08,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:18:08,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:08,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:18:08,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:18:08,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:18:08,317 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:18:08,331 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:18:08,335 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:18:08,337 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:18:08,337 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:18:08,338 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_25-2.c [2020-07-21 22:18:08,416 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffae34702/4c6a58620f224bbd8f498a359f660b14/FLAG1bacd4f9f [2020-07-21 22:18:08,921 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:18:08,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_25-2.c [2020-07-21 22:18:08,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffae34702/4c6a58620f224bbd8f498a359f660b14/FLAG1bacd4f9f [2020-07-21 22:18:09,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffae34702/4c6a58620f224bbd8f498a359f660b14 [2020-07-21 22:18:09,364 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:18:09,366 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:18:09,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:18:09,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:18:09,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:18:09,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:18:09" (1/1) ... [2020-07-21 22:18:09,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@505c7536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:09, skipping insertion in model container [2020-07-21 22:18:09,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:18:09" (1/1) ... [2020-07-21 22:18:09,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:18:09,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:18:09,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:18:09,582 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:18:09,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:18:09,615 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:18:09,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:09 WrapperNode [2020-07-21 22:18:09,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:18:09,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:18:09,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:18:09,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:18:09,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:09" (1/1) ... [2020-07-21 22:18:09,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:09" (1/1) ... [2020-07-21 22:18:09,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:09" (1/1) ... [2020-07-21 22:18:09,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:09" (1/1) ... [2020-07-21 22:18:09,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:09" (1/1) ... [2020-07-21 22:18:09,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:09" (1/1) ... [2020-07-21 22:18:09,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:09" (1/1) ... [2020-07-21 22:18:09,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:18:09,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:18:09,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:18:09,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:18:09,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:18:09,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:18:09,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:18:09,791 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 22:18:09,791 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 22:18:09,791 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:18:09,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:18:09,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:18:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 22:18:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 22:18:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:18:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:18:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:18:09,995 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:18:09,995 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:18:10,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:18:09 BoogieIcfgContainer [2020-07-21 22:18:10,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:18:10,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:18:10,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:18:10,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:18:10,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:18:09" (1/3) ... [2020-07-21 22:18:10,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74546417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:18:10, skipping insertion in model container [2020-07-21 22:18:10,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:09" (2/3) ... [2020-07-21 22:18:10,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74546417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:18:10, skipping insertion in model container [2020-07-21 22:18:10,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:18:09" (3/3) ... [2020-07-21 22:18:10,009 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_25-2.c [2020-07-21 22:18:10,020 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:18:10,028 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:18:10,045 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:18:10,084 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:18:10,084 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:18:10,084 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:18:10,085 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:18:10,085 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:18:10,085 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:18:10,085 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:18:10,086 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:18:10,110 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 22:18:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:18:10,118 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:10,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:10,120 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:10,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:10,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 22:18:10,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:10,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331250319] [2020-07-21 22:18:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:10,218 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:18:10,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:10,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:18:10,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:10,312 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 22:18:10,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:18:10,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331250319] [2020-07-21 22:18:10,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:18:10,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:18:10,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433709107] [2020-07-21 22:18:10,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:18:10,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:10,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:18:10,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:18:10,339 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 22:18:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:10,456 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 22:18:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:18:10,460 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:18:10,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:10,472 INFO L225 Difference]: With dead ends: 44 [2020-07-21 22:18:10,472 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 22:18:10,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:18:10,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 22:18:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 22:18:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:18:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:18:10,527 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 22:18:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:10,528 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:18:10,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:18:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:18:10,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:18:10,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:10,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:10,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:10,746 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:10,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 22:18:10,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:10,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211680323] [2020-07-21 22:18:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:10,775 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:18:10,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:10,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:18:10,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:10,821 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 22:18:10,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:18:10,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211680323] [2020-07-21 22:18:10,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:18:10,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:18:10,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35785545] [2020-07-21 22:18:10,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:18:10,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:10,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:18:10,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:18:10,832 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 22:18:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:10,932 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 22:18:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:18:10,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 22:18:10,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:10,935 INFO L225 Difference]: With dead ends: 36 [2020-07-21 22:18:10,937 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 22:18:10,938 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 22:18:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 22:18:10,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 22:18:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:18:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:18:10,958 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 22:18:10,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:10,958 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:18:10,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:18:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:18:10,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:18:10,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:10,964 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:11,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:11,178 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:11,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:11,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 22:18:11,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:11,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776962809] [2020-07-21 22:18:11,181 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:11,218 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:18:11,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:11,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:18:11,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:18:11,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:11,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:11,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:18:11,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776962809] [2020-07-21 22:18:11,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:11,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:18:11,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259248290] [2020-07-21 22:18:11,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:18:11,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:11,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:18:11,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:18:11,513 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 22:18:11,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:11,660 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 22:18:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:18:11,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 22:18:11,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:11,664 INFO L225 Difference]: With dead ends: 41 [2020-07-21 22:18:11,665 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 22:18:11,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:18:11,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 22:18:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 22:18:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:18:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:18:11,694 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 22:18:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:11,695 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:18:11,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:18:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:18:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:18:11,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:11,698 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:11,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:11,912 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:11,912 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 22:18:11,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:11,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122020706] [2020-07-21 22:18:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:11,958 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:18:11,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:11,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:18:11,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:18:12,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:12,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:12,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:18:12,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122020706] [2020-07-21 22:18:12,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:12,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:18:12,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932962571] [2020-07-21 22:18:12,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:18:12,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:12,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:18:12,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:18:12,224 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 22:18:12,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:12,361 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 22:18:12,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:18:12,362 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 22:18:12,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:12,365 INFO L225 Difference]: With dead ends: 46 [2020-07-21 22:18:12,365 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 22:18:12,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:18:12,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 22:18:12,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 22:18:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:18:12,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:18:12,384 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 22:18:12,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:12,385 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:18:12,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:18:12,385 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:18:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 22:18:12,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:12,388 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:12,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:12,589 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:12,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:12,590 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 22:18:12,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:12,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837858656] [2020-07-21 22:18:12,591 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:12,627 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:18:12,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:12,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:18:12,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 22:18:12,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:12,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:18:13,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837858656] [2020-07-21 22:18:13,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:13,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:18:13,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686325212] [2020-07-21 22:18:13,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:18:13,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:13,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:18:13,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:18:13,088 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 22:18:13,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:13,290 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 22:18:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:18:13,291 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 22:18:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:13,294 INFO L225 Difference]: With dead ends: 51 [2020-07-21 22:18:13,294 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 22:18:13,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:18:13,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 22:18:13,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 22:18:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:18:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:18:13,311 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 22:18:13,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:13,312 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:18:13,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:18:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:18:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 22:18:13,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:13,315 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:13,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:13,522 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:13,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 22:18:13,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:13,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434593556] [2020-07-21 22:18:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:13,550 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:18:13,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:13,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:18:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 22:18:13,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:13,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:18:13,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434593556] [2020-07-21 22:18:13,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:13,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:18:13,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003456487] [2020-07-21 22:18:13,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:18:13,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:13,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:18:13,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:18:13,922 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 22:18:14,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:14,067 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 22:18:14,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:18:14,068 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 22:18:14,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:14,070 INFO L225 Difference]: With dead ends: 56 [2020-07-21 22:18:14,070 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 22:18:14,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:18:14,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 22:18:14,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 22:18:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:18:14,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:18:14,081 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 22:18:14,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:14,081 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:18:14,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:18:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:18:14,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 22:18:14,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:14,084 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:14,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:14,299 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:14,300 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 22:18:14,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:14,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94356088] [2020-07-21 22:18:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:14,346 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:18:14,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:14,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:18:14,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 22:18:14,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:14,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:14,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:14,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:14,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:18:14,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94356088] [2020-07-21 22:18:14,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:14,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 22:18:14,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487192631] [2020-07-21 22:18:14,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:18:14,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:14,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:18:14,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:18:14,956 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 22:18:15,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:15,160 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 22:18:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:18:15,161 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 22:18:15,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:15,163 INFO L225 Difference]: With dead ends: 61 [2020-07-21 22:18:15,163 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 22:18:15,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:18:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 22:18:15,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 22:18:15,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:18:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:18:15,186 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 22:18:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:15,187 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:18:15,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:18:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:18:15,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 22:18:15,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:15,190 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:15,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:15,395 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:15,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:15,396 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 22:18:15,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:15,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805174591] [2020-07-21 22:18:15,398 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:15,432 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:18:15,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:15,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:18:15,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 22:18:15,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:15,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:15,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:15,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:15,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:15,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:18:16,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805174591] [2020-07-21 22:18:16,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:16,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 22:18:16,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6018632] [2020-07-21 22:18:16,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:18:16,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:16,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:18:16,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:18:16,021 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 22:18:16,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:16,229 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 22:18:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:18:16,230 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 22:18:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:16,234 INFO L225 Difference]: With dead ends: 66 [2020-07-21 22:18:16,234 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 22:18:16,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:18:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 22:18:16,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 22:18:16,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:18:16,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:18:16,247 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 22:18:16,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:16,247 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:18:16,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:18:16,248 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:18:16,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 22:18:16,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:16,250 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:16,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:16,463 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:16,464 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 22:18:16,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:16,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023293773] [2020-07-21 22:18:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:16,525 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:18:16,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:16,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:18:16,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 22:18:16,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:17,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:17,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:17,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:17,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:17,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:17,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:17,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 22:18:17,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023293773] [2020-07-21 22:18:17,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:17,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 22:18:17,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781306776] [2020-07-21 22:18:17,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:18:17,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:17,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:18:17,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:18:17,543 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 22:18:17,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:17,787 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 22:18:17,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:18:17,788 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 22:18:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:17,790 INFO L225 Difference]: With dead ends: 71 [2020-07-21 22:18:17,790 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 22:18:17,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:18:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 22:18:17,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 22:18:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:18:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 22:18:17,803 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 22:18:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:17,804 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 22:18:17,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:18:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 22:18:17,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 22:18:17,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:17,806 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:18,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:18,014 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:18,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:18,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 22:18:18,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:18,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533680645] [2020-07-21 22:18:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:18,063 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:18,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:18,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:18:18,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 22:18:18,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:18,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:18,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:18,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:19,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 22:18:19,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533680645] [2020-07-21 22:18:19,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:19,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 22:18:19,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403958432] [2020-07-21 22:18:19,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:18:19,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:19,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:18:19,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:18:19,105 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 22:18:19,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:19,337 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 22:18:19,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:18:19,338 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 22:18:19,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:19,340 INFO L225 Difference]: With dead ends: 76 [2020-07-21 22:18:19,340 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 22:18:19,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:18:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 22:18:19,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 22:18:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:18:19,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 22:18:19,369 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 22:18:19,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:19,370 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 22:18:19,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:18:19,370 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 22:18:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 22:18:19,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:19,375 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:19,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:19,590 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:19,591 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 22:18:19,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:19,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068139204] [2020-07-21 22:18:19,592 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:19,660 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:19,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:19,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:18:19,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 22:18:19,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:20,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:21,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:21,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:21,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:21,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:21,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:21,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:21,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 22:18:21,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068139204] [2020-07-21 22:18:21,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:21,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 22:18:21,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581580479] [2020-07-21 22:18:21,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:18:21,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:21,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:18:21,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:18:21,439 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 22:18:21,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:21,723 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 22:18:21,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:18:21,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 22:18:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:21,726 INFO L225 Difference]: With dead ends: 81 [2020-07-21 22:18:21,726 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 22:18:21,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:18:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 22:18:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 22:18:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 22:18:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 22:18:21,737 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 22:18:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:21,738 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 22:18:21,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:18:21,738 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 22:18:21,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 22:18:21,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:21,741 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:21,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:21,955 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:21,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:21,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 22:18:21,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:21,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488875559] [2020-07-21 22:18:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:22,029 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:22,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:22,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:18:22,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 22:18:22,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:22,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:23,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:23,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:23,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:23,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:23,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:23,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 22:18:23,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488875559] [2020-07-21 22:18:23,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:23,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 22:18:23,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665057210] [2020-07-21 22:18:23,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:18:23,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:23,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:18:23,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:18:23,583 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 22:18:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:23,854 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 22:18:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:18:23,855 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 22:18:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:23,858 INFO L225 Difference]: With dead ends: 86 [2020-07-21 22:18:23,860 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 22:18:23,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:18:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 22:18:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 22:18:23,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 22:18:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 22:18:23,887 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 22:18:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:23,887 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 22:18:23,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:18:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 22:18:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 22:18:23,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:23,893 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:24,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:24,106 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:24,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:24,107 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 22:18:24,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:24,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108909482] [2020-07-21 22:18:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:24,192 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:24,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:24,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:18:24,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 22:18:24,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:25,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:25,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 22:18:26,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108909482] [2020-07-21 22:18:26,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:26,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 22:18:26,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242960721] [2020-07-21 22:18:26,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:18:26,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:26,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:18:26,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:18:26,634 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 22:18:27,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:27,032 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 22:18:27,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:18:27,032 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 22:18:27,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:27,034 INFO L225 Difference]: With dead ends: 91 [2020-07-21 22:18:27,034 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 22:18:27,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:18:27,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 22:18:27,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 22:18:27,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 22:18:27,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 22:18:27,046 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 22:18:27,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:27,047 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 22:18:27,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:18:27,047 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 22:18:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 22:18:27,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:27,050 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:27,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:27,265 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:27,266 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 22:18:27,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:27,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673068242] [2020-07-21 22:18:27,267 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:27,382 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:27,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:27,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:18:27,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 22:18:27,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:28,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:29,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:29,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:29,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:29,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:29,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:29,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:29,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 22:18:29,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673068242] [2020-07-21 22:18:29,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:29,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 22:18:29,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003162914] [2020-07-21 22:18:29,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:18:29,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:29,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:18:29,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:18:29,980 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 20 states. [2020-07-21 22:18:30,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:30,359 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 22:18:30,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:18:30,360 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2020-07-21 22:18:30,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:30,362 INFO L225 Difference]: With dead ends: 96 [2020-07-21 22:18:30,363 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 22:18:30,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:18:30,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 22:18:30,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 22:18:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 22:18:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 22:18:30,375 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 22:18:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:30,376 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 22:18:30,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:18:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 22:18:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 22:18:30,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:30,384 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:30,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:30,599 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 22:18:30,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:30,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173476442] [2020-07-21 22:18:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:30,749 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:30,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:30,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:18:30,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 22:18:30,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:32,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:32,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:33,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:33,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 22:18:34,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173476442] [2020-07-21 22:18:34,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:34,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 22:18:34,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357744298] [2020-07-21 22:18:34,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:18:34,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:34,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:18:34,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:18:34,701 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 22 states. [2020-07-21 22:18:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:35,185 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 22:18:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:18:35,186 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 351 [2020-07-21 22:18:35,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:35,192 INFO L225 Difference]: With dead ends: 101 [2020-07-21 22:18:35,193 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 22:18:35,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:18:35,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 22:18:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 22:18:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:18:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 22:18:35,216 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 22:18:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:35,217 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 22:18:35,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:18:35,218 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 22:18:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 22:18:35,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:35,227 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 22, 21, 21, 14, 14, 14, 14, 14, 14, 14, 14, 12, 10, 10, 10, 10, 10, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:35,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:35,441 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:35,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:35,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1413996641, now seen corresponding path program 3 times [2020-07-21 22:18:35,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:35,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643960515] [2020-07-21 22:18:35,443 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:35,650 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:35,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:35,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:18:35,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 762 refuted. 0 times theorem prover too weak. 2319 trivial. 0 not checked. [2020-07-21 22:18:35,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:37,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:37,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:38,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:39,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:39,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:39,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:39,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:39,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:39,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 795 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-21 22:18:39,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643960515] [2020-07-21 22:18:39,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:39,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 22:18:39,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861575029] [2020-07-21 22:18:39,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:18:39,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:39,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:18:39,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:18:39,760 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 22 states. [2020-07-21 22:18:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:40,231 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2020-07-21 22:18:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:18:40,231 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2020-07-21 22:18:40,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:40,235 INFO L225 Difference]: With dead ends: 106 [2020-07-21 22:18:40,235 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 22:18:40,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 638 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:18:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 22:18:40,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-07-21 22:18:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:18:40,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 22:18:40,259 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 337 [2020-07-21 22:18:40,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:40,261 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 22:18:40,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:18:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 22:18:40,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-07-21 22:18:40,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:40,271 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 52, 52, 47, 36, 36, 36, 36, 36, 36, 36, 36, 26, 26, 26, 26, 26, 26, 26, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:40,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:40,486 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:40,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:40,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1230346157, now seen corresponding path program 7 times [2020-07-21 22:18:40,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:40,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921790768] [2020-07-21 22:18:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:40,732 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:40,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:40,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:18:40,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2371 refuted. 0 times theorem prover too weak. 17847 trivial. 0 not checked. [2020-07-21 22:18:41,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:45,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:46,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:46,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:46,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:47,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:47,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:47,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:47,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:47,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:48,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:48,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:48,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2411 refuted. 0 times theorem prover too weak. 17807 trivial. 0 not checked. [2020-07-21 22:18:48,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921790768] [2020-07-21 22:18:48,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:48,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 22:18:48,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950954674] [2020-07-21 22:18:48,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 22:18:48,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:48,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 22:18:48,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:18:48,478 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 24 states. [2020-07-21 22:18:49,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:49,101 INFO L93 Difference]: Finished difference Result 111 states and 276 transitions. [2020-07-21 22:18:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:18:49,102 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 819 [2020-07-21 22:18:49,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:49,107 INFO L225 Difference]: With dead ends: 111 [2020-07-21 22:18:49,107 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 22:18:49,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1599 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 22:18:49,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 22:18:49,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-21 22:18:49,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 22:18:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 22:18:49,120 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 819 [2020-07-21 22:18:49,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:49,121 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 22:18:49,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 22:18:49,122 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 22:18:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-21 22:18:49,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:49,125 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 27, 24, 24, 18, 18, 18, 18, 18, 18, 18, 18, 15, 12, 12, 12, 12, 12, 12, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:49,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:49,339 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:49,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:49,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2047786411, now seen corresponding path program 4 times [2020-07-21 22:18:49,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:49,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773802287] [2020-07-21 22:18:49,341 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:49,570 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:49,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:49,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:18:49,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1118 refuted. 0 times theorem prover too weak. 3842 trivial. 0 not checked. [2020-07-21 22:18:49,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:52,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:53,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:53,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:54,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:54,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:54,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:54,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:54,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:55,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:55,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:55,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1162 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2020-07-21 22:18:55,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773802287] [2020-07-21 22:18:55,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:55,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 22:18:55,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242274600] [2020-07-21 22:18:55,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 22:18:55,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:55,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 22:18:55,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:18:55,207 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 24 states. [2020-07-21 22:18:55,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:55,827 INFO L93 Difference]: Finished difference Result 116 states and 300 transitions. [2020-07-21 22:18:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:18:55,828 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 418 [2020-07-21 22:18:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:55,833 INFO L225 Difference]: With dead ends: 116 [2020-07-21 22:18:55,833 INFO L226 Difference]: Without dead ends: 112 [2020-07-21 22:18:55,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 796 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 22:18:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-21 22:18:55,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2020-07-21 22:18:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 22:18:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 22:18:55,849 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 418 [2020-07-21 22:18:55,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:55,850 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 22:18:55,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 22:18:55,850 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 22:18:55,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2020-07-21 22:18:55,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:55,858 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 46, 45, 45, 34, 34, 34, 34, 34, 34, 34, 34, 22, 22, 22, 22, 22, 22, 22, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:56,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:56,071 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:56,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1563866591, now seen corresponding path program 8 times [2020-07-21 22:18:56,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:56,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041128281] [2020-07-21 22:18:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:56,385 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:56,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:56,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:18:56,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2323 refuted. 0 times theorem prover too weak. 14314 trivial. 0 not checked. [2020-07-21 22:18:56,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:00,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:00,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:02,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:02,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:03,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:04,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:04,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:05,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:05,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:05,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:05,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:05,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:05,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:05,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:05,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2375 refuted. 0 times theorem prover too weak. 14262 trivial. 0 not checked. [2020-07-21 22:19:05,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041128281] [2020-07-21 22:19:05,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:05,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-21 22:19:05,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199653289] [2020-07-21 22:19:05,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 22:19:05,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:05,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 22:19:05,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:19:05,987 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 26 states. [2020-07-21 22:19:06,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:06,601 INFO L93 Difference]: Finished difference Result 121 states and 324 transitions. [2020-07-21 22:19:06,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:19:06,602 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 741 [2020-07-21 22:19:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:06,606 INFO L225 Difference]: With dead ends: 121 [2020-07-21 22:19:06,606 INFO L226 Difference]: Without dead ends: 117 [2020-07-21 22:19:06,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1493 GetRequests, 1439 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 22:19:06,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-21 22:19:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-07-21 22:19:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 22:19:06,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 22:19:06,620 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 741 [2020-07-21 22:19:06,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:06,621 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 22:19:06,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 22:19:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 22:19:06,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-21 22:19:06,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:06,631 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 55, 55, 53, 37, 37, 37, 37, 37, 37, 37, 37, 27, 27, 27, 27, 27, 27, 27, 26, 21, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:06,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:06,845 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:06,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:06,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2100501163, now seen corresponding path program 4 times [2020-07-21 22:19:06,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:06,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707914530] [2020-07-21 22:19:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:07,219 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:19:07,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:07,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:19:07,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2821 refuted. 0 times theorem prover too weak. 19575 trivial. 0 not checked. [2020-07-21 22:19:07,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:12,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:12,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:14,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:15,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:15,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:16,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:16,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:17,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:17,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:17,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:17,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:17,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2877 refuted. 0 times theorem prover too weak. 19519 trivial. 0 not checked. [2020-07-21 22:19:17,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707914530] [2020-07-21 22:19:17,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:17,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-21 22:19:17,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087382739] [2020-07-21 22:19:17,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 22:19:17,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:17,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 22:19:17,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:19:17,784 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 26 states. [2020-07-21 22:19:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:18,494 INFO L93 Difference]: Finished difference Result 126 states and 350 transitions. [2020-07-21 22:19:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:19:18,495 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 871 [2020-07-21 22:19:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:18,499 INFO L225 Difference]: With dead ends: 126 [2020-07-21 22:19:18,499 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 22:19:18,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1752 GetRequests, 1698 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 22:19:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 22:19:18,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-07-21 22:19:18,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 22:19:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 22:19:18,516 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 871 [2020-07-21 22:19:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:18,517 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 22:19:18,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 22:19:18,517 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 22:19:18,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1691 [2020-07-21 22:19:18,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:18,550 INFO L422 BasicCegarLoop]: trace histogram [149, 149, 110, 110, 94, 74, 74, 74, 74, 74, 74, 74, 74, 55, 55, 55, 55, 55, 55, 55, 55, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:18,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:18,764 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:18,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:18,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1326645612, now seen corresponding path program 9 times [2020-07-21 22:19:18,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:18,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668082640] [2020-07-21 22:19:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:19,347 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:19:19,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:19,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 22:19:19,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6392 refuted. 0 times theorem prover too weak. 81780 trivial. 0 not checked. [2020-07-21 22:19:21,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:30,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:30,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:33,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:35,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:36,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:37,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:37,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:38,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:38,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:38,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:38,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:39,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:39,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:39,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6457 refuted. 0 times theorem prover too weak. 81715 trivial. 0 not checked. [2020-07-21 22:19:40,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668082640] [2020-07-21 22:19:40,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:40,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-21 22:19:40,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749043947] [2020-07-21 22:19:40,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 22:19:40,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:40,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 22:19:40,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:19:40,355 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 28 states. [2020-07-21 22:19:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:41,321 INFO L93 Difference]: Finished difference Result 131 states and 376 transitions. [2020-07-21 22:19:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 22:19:41,323 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1690 [2020-07-21 22:19:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:41,329 INFO L225 Difference]: With dead ends: 131 [2020-07-21 22:19:41,329 INFO L226 Difference]: Without dead ends: 127 [2020-07-21 22:19:41,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3392 GetRequests, 3333 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 22:19:41,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-21 22:19:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 80. [2020-07-21 22:19:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 22:19:41,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-21 22:19:41,354 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1690 [2020-07-21 22:19:41,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:41,355 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-21 22:19:41,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 22:19:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-21 22:19:41,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1433 [2020-07-21 22:19:41,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:41,377 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 92, 92, 87, 60, 60, 60, 60, 60, 60, 60, 60, 46, 46, 46, 46, 46, 46, 46, 41, 34, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:41,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:41,592 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:41,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:41,594 INFO L82 PathProgramCache]: Analyzing trace with hash -37703149, now seen corresponding path program 5 times [2020-07-21 22:19:41,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:41,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548264709] [2020-07-21 22:19:41,595 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:42,149 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:19:42,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:42,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 22:19:42,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5319 refuted. 0 times theorem prover too weak. 56349 trivial. 0 not checked. [2020-07-21 22:19:44,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:52,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:52,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:55,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:55,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:57,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:57,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:58,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:00,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:01,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:01,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:01,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:01,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:02,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:02,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5389 refuted. 0 times theorem prover too weak. 56279 trivial. 0 not checked. [2020-07-21 22:20:03,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548264709] [2020-07-21 22:20:03,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:03,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-21 22:20:03,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912310535] [2020-07-21 22:20:03,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 22:20:03,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:03,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 22:20:03,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:20:03,183 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 28 states. [2020-07-21 22:20:04,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:04,202 INFO L93 Difference]: Finished difference Result 136 states and 404 transitions. [2020-07-21 22:20:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 22:20:04,205 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1432 [2020-07-21 22:20:04,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:04,208 INFO L225 Difference]: With dead ends: 136 [2020-07-21 22:20:04,209 INFO L226 Difference]: Without dead ends: 132 [2020-07-21 22:20:04,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2875 GetRequests, 2816 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 22:20:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-21 22:20:04,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-07-21 22:20:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 22:20:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-21 22:20:04,230 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1432 [2020-07-21 22:20:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:04,232 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-21 22:20:04,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 22:20:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-21 22:20:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1990 [2020-07-21 22:20:04,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:04,270 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 112, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 64, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:04,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:04,471 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:04,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1412849447, now seen corresponding path program 10 times [2020-07-21 22:20:04,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:04,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709705136] [2020-07-21 22:20:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:05,204 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:05,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:05,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 22:20:05,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8137 refuted. 0 times theorem prover too weak. 114500 trivial. 0 not checked. [2020-07-21 22:20:07,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:11,227 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:20:11,330 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:20:19,903 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:20:20,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:20,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:25,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:29,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:29,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:33,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:34,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:36,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:36,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:36,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:36,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8217 refuted. 0 times theorem prover too weak. 114420 trivial. 0 not checked. [2020-07-21 22:20:39,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709705136] [2020-07-21 22:20:39,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:39,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-21 22:20:39,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201704309] [2020-07-21 22:20:39,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 22:20:39,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:39,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 22:20:39,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:20:39,193 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 30 states. [2020-07-21 22:20:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:40,546 INFO L93 Difference]: Finished difference Result 141 states and 432 transitions. [2020-07-21 22:20:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 22:20:40,548 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 1989 [2020-07-21 22:20:40,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:40,554 INFO L225 Difference]: With dead ends: 141 [2020-07-21 22:20:40,554 INFO L226 Difference]: Without dead ends: 137 [2020-07-21 22:20:40,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3991 GetRequests, 3927 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 22:20:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-21 22:20:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-07-21 22:20:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 22:20:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-21 22:20:40,571 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 1989 [2020-07-21 22:20:40,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:40,573 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-21 22:20:40,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 22:20:40,574 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-21 22:20:40,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2050 [2020-07-21 22:20:40,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:40,632 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 124, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 60, 52, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:40,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:40,846 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:40,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:40,848 INFO L82 PathProgramCache]: Analyzing trace with hash 266934567, now seen corresponding path program 5 times [2020-07-21 22:20:40,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:40,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431582566] [2020-07-21 22:20:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:41,729 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:41,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:41,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 22:20:41,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8506 refuted. 0 times theorem prover too weak. 119697 trivial. 0 not checked. [2020-07-21 22:20:43,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:56,399 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:20:57,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:57,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:03,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:10,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:10,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:13,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:15,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:15,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:16,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:17,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8591 refuted. 0 times theorem prover too weak. 119612 trivial. 0 not checked. [2020-07-21 22:21:20,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431582566] [2020-07-21 22:21:20,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:20,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-21 22:21:20,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980468220] [2020-07-21 22:21:20,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 22:21:20,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:20,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 22:21:20,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:21:20,390 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 30 states. [2020-07-21 22:21:22,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:22,072 INFO L93 Difference]: Finished difference Result 146 states and 462 transitions. [2020-07-21 22:21:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 22:21:22,075 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 2049 [2020-07-21 22:21:22,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:22,080 INFO L225 Difference]: With dead ends: 146 [2020-07-21 22:21:22,080 INFO L226 Difference]: Without dead ends: 142 [2020-07-21 22:21:22,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4110 GetRequests, 4046 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 22:21:22,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-21 22:21:22,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 85. [2020-07-21 22:21:22,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 22:21:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-21 22:21:22,100 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 2049 [2020-07-21 22:21:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:22,102 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-21 22:21:22,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 22:21:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-21 22:21:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3680 [2020-07-21 22:21:22,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:22,243 INFO L422 BasicCegarLoop]: trace histogram [329, 329, 236, 236, 211, 164, 164, 164, 164, 164, 164, 164, 164, 118, 118, 118, 118, 118, 118, 118, 118, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:22,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:22,457 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:22,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash -886096047, now seen corresponding path program 11 times [2020-07-21 22:21:22,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:22,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833640886] [2020-07-21 22:21:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:23,511 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:23,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:23,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 22:21:23,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16770 refuted. 0 times theorem prover too weak. 408925 trivial. 0 not checked. [2020-07-21 22:21:28,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:32,451 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:21:32,707 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:21:32,821 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:21:33,903 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:21:34,011 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:21:34,131 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:21:34,251 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:21:36,111 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:21:36,241 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:21:36,358 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:21:36,468 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:21:36,593 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 22:21:36,714 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:21:36,830 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:21:36,944 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:21:37,051 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:21:37,155 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 22:21:55,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:04,887 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:22:05,000 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:22:05,696 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:22:05,890 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:22:06,009 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:22:06,123 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:22:06,237 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:22:07,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:14,220 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:22:14,325 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:22:14,433 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:22:14,543 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:22:14,656 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:22:15,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:15,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:26,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:31,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:31,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:34,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:36,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:36,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:37,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:38,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:38,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:39,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:39,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16866 refuted. 0 times theorem prover too weak. 408829 trivial. 0 not checked. [2020-07-21 22:22:44,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833640886] [2020-07-21 22:22:44,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:44,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-21 22:22:44,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973877501] [2020-07-21 22:22:44,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-21 22:22:44,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:44,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-21 22:22:44,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:22:44,757 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 32 states. [2020-07-21 22:22:47,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:47,339 INFO L93 Difference]: Finished difference Result 151 states and 492 transitions. [2020-07-21 22:22:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 22:22:47,343 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3679 [2020-07-21 22:22:47,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:47,351 INFO L225 Difference]: With dead ends: 151 [2020-07-21 22:22:47,352 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 22:22:47,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7372 GetRequests, 7303 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 22:22:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 22:22:47,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2020-07-21 22:22:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 22:22:47,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-21 22:22:47,375 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3679 [2020-07-21 22:22:47,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:47,379 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-21 22:22:47,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-21 22:22:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-21 22:22:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3365 [2020-07-21 22:22:47,518 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:47,521 INFO L422 BasicCegarLoop]: trace histogram [287, 287, 214, 214, 208, 143, 143, 143, 143, 143, 143, 143, 143, 107, 107, 107, 107, 107, 107, 107, 101, 79, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:47,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:47,736 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:47,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:47,737 INFO L82 PathProgramCache]: Analyzing trace with hash 147049693, now seen corresponding path program 6 times [2020-07-21 22:22:47,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:47,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968597953] [2020-07-21 22:22:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:48,866 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:22:48,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:48,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 1867 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 22:22:48,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15526 refuted. 0 times theorem prover too weak. 332578 trivial. 0 not checked. [2020-07-21 22:22:53,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:55,845 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:22:55,957 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:22:56,069 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:22:56,700 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:22:56,811 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:22:56,930 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:22:57,041 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:22:58,808 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:22:58,941 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:22:59,097 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:22:59,261 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:23:00,791 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:23:00,944 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:23:01,097 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:23:01,260 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:23:03,428 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:23:03,582 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:23:03,757 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:23:03,934 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:23:04,100 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 22:23:04,258 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:23:04,404 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:23:04,539 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 22:23:04,647 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:23:04,756 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 22:23:22,661 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:23:22,809 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:23:24,217 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:23:24,360 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:23:24,517 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:23:24,676 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:23:24,835 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:23:24,979 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:23:25,110 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 22:23:25,238 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:23:25,369 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:23:25,488 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:23:26,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:26,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:35,653 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:23:35,802 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:23:35,952 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:23:36,106 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:23:36,254 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:23:36,407 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:23:36,541 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:23:36,668 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:23:36,788 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:23:36,908 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 22:23:37,015 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:23:37,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:55,976 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:23:56,170 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:23:56,271 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:23:57,096 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:23:57,227 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:23:57,357 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:23:57,484 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:23:58,157 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:23:58,309 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:23:58,469 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:23:58,626 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:23:58,776 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:23:58,907 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:23:59,031 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:23:59,148 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:23:59,257 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:23:59,362 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:23:59,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:59,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:05,050 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:24:05,164 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:24:05,272 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:24:05,804 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:24:05,920 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:24:06,042 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:24:06,167 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:24:07,291 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:24:07,423 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:24:07,568 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:24:07,707 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:24:07,847 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:24:07,975 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:24:08,097 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:24:08,212 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:24:08,321 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:24:08,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:08,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:16,417 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:24:16,523 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:24:16,641 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:24:16,754 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:24:17,203 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:24:17,324 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:24:17,455 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:24:17,584 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:24:17,702 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:24:17,817 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:24:17,923 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:24:18,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:21,685 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:24:21,794 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:24:21,911 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:24:22,027 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:24:22,136 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:24:22,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:24,911 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:24:25,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:27,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:28,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:29,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:29,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:29,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15628 refuted. 0 times theorem prover too weak. 332476 trivial. 0 not checked. [2020-07-21 22:24:34,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968597953] [2020-07-21 22:24:34,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:34,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-21 22:24:34,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119730414] [2020-07-21 22:24:34,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-21 22:24:34,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:34,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-21 22:24:34,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:24:34,225 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 32 states. [2020-07-21 22:24:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:37,986 INFO L93 Difference]: Finished difference Result 156 states and 524 transitions. [2020-07-21 22:24:38,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 22:24:38,000 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3364 [2020-07-21 22:24:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:38,009 INFO L225 Difference]: With dead ends: 156 [2020-07-21 22:24:38,009 INFO L226 Difference]: Without dead ends: 152 [2020-07-21 22:24:38,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6741 GetRequests, 6672 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 22:24:38,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-21 22:24:38,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2020-07-21 22:24:38,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 22:24:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-21 22:24:38,035 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3364 [2020-07-21 22:24:38,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:38,038 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-21 22:24:38,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-21 22:24:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-21 22:24:38,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4616 [2020-07-21 22:24:38,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:38,248 INFO L422 BasicCegarLoop]: trace histogram [436, 436, 300, 273, 273, 218, 218, 218, 218, 218, 218, 218, 218, 136, 136, 136, 136, 136, 136, 136, 136, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:38,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:38,449 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:38,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:38,452 INFO L82 PathProgramCache]: Analyzing trace with hash -554675479, now seen corresponding path program 12 times [2020-07-21 22:24:38,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:38,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213146624] [2020-07-21 22:24:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:39,964 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:24:39,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:39,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 2571 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 22:24:40,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 22920 refuted. 0 times theorem prover too weak. 665925 trivial. 0 not checked. [2020-07-21 22:24:48,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:50,631 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:24:50,735 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:24:51,157 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:24:51,273 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:24:51,394 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:24:51,518 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:24:52,272 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:24:52,400 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:24:52,537 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:24:52,676 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:24:53,357 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:24:53,504 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:24:53,652 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:24:53,803 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:24:54,710 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:24:54,846 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:24:55,027 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:24:55,199 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:24:56,741 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:24:56,926 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:24:57,111 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:24:57,285 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:25:01,521 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:25:01,727 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:25:01,925 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:25:02,119 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:25:05,196 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:25:05,425 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:25:05,658 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:25:05,890 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:25:09,786 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:25:09,997 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:25:10,244 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:25:10,500 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:25:10,753 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 22:25:11,021 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 22:25:11,249 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 22:25:11,476 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:25:11,703 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:25:11,909 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 22:25:12,096 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 22:25:12,284 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 22:25:12,462 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:25:12,634 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 22:25:12,796 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:25:12,943 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 22:25:13,084 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:25:13,214 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:25:13,338 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:25:13,452 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:25:13,560 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:25:51,602 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:25:51,721 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:25:51,854 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:25:51,981 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:25:52,589 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:25:52,716 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:25:52,868 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:25:53,017 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:25:53,791 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:25:53,948 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:25:54,116 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:25:54,272 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:25:55,123 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:25:55,278 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:25:55,446 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:25:55,613 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:25:57,093 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:25:57,290 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:25:57,502 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:25:57,710 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:26:03,036 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:26:03,258 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:26:03,490 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:26:03,727 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:26:07,341 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:26:07,565 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:26:07,789 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:26:08,013 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:26:08,249 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 22:26:08,459 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:26:08,654 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 22:26:08,859 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 22:26:09,036 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 22:26:09,211 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:26:09,385 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:26:09,554 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 22:26:09,714 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:26:09,867 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 22:26:09,998 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:26:10,116 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 22:26:10,227 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:26:10,343 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:26:10,450 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:26:10,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:32,255 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 22:26:32,374 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 22:26:32,497 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:26:32,619 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:26:33,032 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:26:33,170 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:26:33,318 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:26:33,470 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:26:34,244 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:26:34,380 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:26:34,527 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:26:34,675 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:26:35,357 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:26:35,525 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:26:35,718 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:26:35,910 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:26:37,185 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:26:37,381 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:26:37,593 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:26:37,802 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:26:39,783 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:26:39,989 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:26:40,201 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:26:40,390 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:26:45,537 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:26:45,762 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:26:45,992 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:26:46,231 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:26:46,455 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:26:46,665 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:26:46,875 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:26:47,087 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:26:47,276 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 22:26:47,465 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:26:47,644 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:26:47,816 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 22:26:47,978 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:26:48,115 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:26:48,244 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:26:48,367 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 22:26:48,483 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:26:48,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:14,484 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:27:14,593 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:27:15,034 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:15,147 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:15,269 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:27:15,390 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:27:16,017 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:27:16,139 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:27:16,266 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:27:16,394 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:27:17,424 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:27:17,564 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:27:17,720 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:27:17,871 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:27:18,018 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:27:18,155 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:27:18,287 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:27:18,409 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:27:18,526 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:27:18,635 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:27:19,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:27,153 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:27:27,263 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:27:27,375 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:27:27,829 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:27,944 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:28,064 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:27:28,188 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:27:28,871 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:27:29,000 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:27:29,138 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:27:29,275 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:27:29,410 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:27:29,540 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:27:29,659 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-21 22:27:29,773 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:27:29,878 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 22:27:29,982 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:27:30,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:35,491 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:27:35,595 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:27:35,708 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:27:35,818 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:27:36,288 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:36,407 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:36,535 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:27:36,660 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:27:36,782 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:27:36,898 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:27:37,002 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 22:27:37,107 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 22:27:37,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:41,608 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:27:41,715 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:27:41,829 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:27:41,940 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:27:42,053 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:27:42,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:42,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:44,973 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 22:27:46,800 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:27:47,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:49,843 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 22:27:50,059 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:27:50,532 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 22:27:50,648 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 22:27:50,783 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:27:50,914 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:27:51,038 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:27:51,153 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 22:27:51,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:53,753 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:27:53,866 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:27:54,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:55,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:56,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:57,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:57,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:57,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 23034 refuted. 0 times theorem prover too weak. 665811 trivial. 0 not checked. [2020-07-21 22:28:06,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213146624] [2020-07-21 22:28:06,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:28:06,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 34 [2020-07-21 22:28:06,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804081361] [2020-07-21 22:28:06,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 22:28:06,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:28:06,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 22:28:06,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 22:28:06,785 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 34 states. [2020-07-21 22:28:12,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:28:12,443 INFO L93 Difference]: Finished difference Result 161 states and 556 transitions. [2020-07-21 22:28:12,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 22:28:12,447 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 4615 [2020-07-21 22:28:12,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:28:12,455 INFO L225 Difference]: With dead ends: 161 [2020-07-21 22:28:12,456 INFO L226 Difference]: Without dead ends: 157 [2020-07-21 22:28:12,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9245 GetRequests, 9171 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 22:28:12,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-21 22:28:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-07-21 22:28:12,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 22:28:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 219 transitions. [2020-07-21 22:28:12,487 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 219 transitions. Word has length 4615 [2020-07-21 22:28:12,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:28:12,492 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 219 transitions. [2020-07-21 22:28:12,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 22:28:12,492 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 219 transitions. [2020-07-21 22:28:13,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9330 [2020-07-21 22:28:13,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:28:13,189 INFO L422 BasicCegarLoop]: trace histogram [846, 846, 625, 533, 533, 423, 423, 423, 423, 423, 423, 423, 423, 359, 266, 266, 266, 266, 266, 266, 266, 221, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:28:13,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:28:13,398 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:28:13,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:28:13,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1670319822, now seen corresponding path program 6 times [2020-07-21 22:28:13,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:28:13,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371175832] [2020-07-21 22:28:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:28:15,805 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:28:15,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:28:15,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 5179 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 22:28:15,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:28:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2779097 backedges. 4429 proven. 49554 refuted. 0 times theorem prover too weak. 2725114 trivial. 0 not checked. [2020-07-21 22:28:53,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:28:54,731 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 22:28:54,837 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 22:28:54,954 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:28:55,070 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 22:28:55,751 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:28:56,169 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:28:56,278 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:28:56,393 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:28:56,515 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:28:57,778 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:28:57,951 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:28:58,130 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:28:58,309 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:28:59,249 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:28:59,440 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:28:59,641 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:28:59,842 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:29:01,252 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:29:01,460 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:29:01,682 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:29:01,903 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:29:04,544 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:29:04,776 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:29:05,017 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:29:05,258 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:29:10,640 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:29:10,891 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:29:11,157 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:29:11,416 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:29:23,644 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:29:23,919 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:29:24,208 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:29:24,497 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:29:45,078 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:29:45,381 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:29:45,690 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:29:46,001 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:29:46,309 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 22:29:46,599 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 22:29:46,882 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 22:29:47,151 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:29:47,411 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 22:29:47,662 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 22:29:47,898 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 22:29:48,123 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 22:29:48,346 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:29:48,551 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:29:48,747 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:29:48,935 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 22:29:49,111 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:29:49,276 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 22:29:49,430 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:29:49,589 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 22:29:49,721 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:29:49,841 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:29:49,952 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 22:31:12,664 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 1