/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:13:24,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:13:24,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:13:24,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:13:24,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:13:24,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:13:24,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:13:24,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:13:24,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:13:24,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:13:24,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:13:24,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:13:24,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:13:24,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:13:24,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:13:24,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:13:24,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:13:24,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:13:24,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:13:24,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:13:24,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:13:24,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:13:24,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:13:24,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:13:24,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:13:24,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:13:24,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:13:24,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:13:24,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:13:24,518 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:13:24,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:13:24,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:13:24,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:13:24,520 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:13:24,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:13:24,521 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:13:24,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:13:24,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:13:24,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:13:24,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:13:24,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:13:24,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:13:24,522 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:13:24,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:13:24,523 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:13:24,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:13:24,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:13:24,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:13:24,524 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:13:24,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:13:24,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:13:24,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:13:24,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:13:24,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:13:24,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:13:24,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:24,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:13:24,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:13:24,526 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:13:24,847 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:13:24,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:13:24,869 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:13:24,870 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:13:24,871 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:13:24,872 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi01.c [2020-07-20 21:13:24,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a8e2d369/ca2318713c0e45fb84bcc4efdf584ffb/FLAGf89eca442 [2020-07-20 21:13:25,463 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:13:25,464 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi01.c [2020-07-20 21:13:25,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a8e2d369/ca2318713c0e45fb84bcc4efdf584ffb/FLAGf89eca442 [2020-07-20 21:13:25,818 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a8e2d369/ca2318713c0e45fb84bcc4efdf584ffb [2020-07-20 21:13:25,828 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:13:25,831 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:13:25,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:13:25,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:13:25,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:13:25,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:13:25" (1/1) ... [2020-07-20 21:13:25,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5877701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:25, skipping insertion in model container [2020-07-20 21:13:25,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:13:25" (1/1) ... [2020-07-20 21:13:25,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:13:25,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:13:26,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:13:26,103 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:13:26,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:13:26,145 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:13:26,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:26 WrapperNode [2020-07-20 21:13:26,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:13:26,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:13:26,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:13:26,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:13:26,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:26" (1/1) ... [2020-07-20 21:13:26,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:26" (1/1) ... [2020-07-20 21:13:26,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:26" (1/1) ... [2020-07-20 21:13:26,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:26" (1/1) ... [2020-07-20 21:13:26,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:26" (1/1) ... [2020-07-20 21:13:26,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:26" (1/1) ... [2020-07-20 21:13:26,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:26" (1/1) ... [2020-07-20 21:13:26,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:13:26,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:13:26,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:13:26,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:13:26,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:13:26,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:13:26,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:13:26,365 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-20 21:13:26,365 INFO L138 BoogieDeclarations]: Found implementation of procedure applyHanoi [2020-07-20 21:13:26,365 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:13:26,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:13:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:13:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-20 21:13:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure applyHanoi [2020-07-20 21:13:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:13:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:13:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:13:26,606 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:13:26,606 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:13:26,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:13:26 BoogieIcfgContainer [2020-07-20 21:13:26,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:13:26,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:13:26,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:13:26,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:13:26,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:13:25" (1/3) ... [2020-07-20 21:13:26,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e6f6a16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:13:26, skipping insertion in model container [2020-07-20 21:13:26,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:26" (2/3) ... [2020-07-20 21:13:26,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e6f6a16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:13:26, skipping insertion in model container [2020-07-20 21:13:26,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:13:26" (3/3) ... [2020-07-20 21:13:26,622 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi01.c [2020-07-20 21:13:26,634 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:13:26,642 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:13:26,656 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:13:26,684 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:13:26,685 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:13:26,685 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:13:26,685 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:13:26,686 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:13:26,686 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:13:26,686 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:13:26,686 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:13:26,707 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 21:13:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 21:13:26,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:26,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:26,717 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:26,723 INFO L82 PathProgramCache]: Analyzing trace with hash -629617454, now seen corresponding path program 1 times [2020-07-20 21:13:26,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:26,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503865145] [2020-07-20 21:13:26,731 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 [2020-07-20 21:13:26,826 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:13:26,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:26,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:13:26,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:13:26,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:26,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503865145] [2020-07-20 21:13:26,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:26,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:13:26,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42034138] [2020-07-20 21:13:26,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:13:26,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:26,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:13:26,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:13:26,984 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-07-20 21:13:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:27,119 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-07-20 21:13:27,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:13:27,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 21:13:27,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:27,134 INFO L225 Difference]: With dead ends: 48 [2020-07-20 21:13:27,135 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 21:13:27,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:13:27,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 21:13:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 21:13:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 21:13:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-07-20 21:13:27,198 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 20 [2020-07-20 21:13:27,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:27,199 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-07-20 21:13:27,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:13:27,199 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-07-20 21:13:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 21:13:27,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:27,203 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:27,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:27,418 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:27,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:27,419 INFO L82 PathProgramCache]: Analyzing trace with hash 223523063, now seen corresponding path program 1 times [2020-07-20 21:13:27,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:27,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674370116] [2020-07-20 21:13:27,420 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 [2020-07-20 21:13:27,553 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:27,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:27,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 21:13:27,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 21:13:27,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:13:27,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674370116] [2020-07-20 21:13:27,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:27,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2020-07-20 21:13:27,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346973293] [2020-07-20 21:13:27,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:13:27,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:27,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:13:27,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:13:27,979 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 15 states. [2020-07-20 21:13:28,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:28,637 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2020-07-20 21:13:28,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 21:13:28,638 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-07-20 21:13:28,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:28,642 INFO L225 Difference]: With dead ends: 78 [2020-07-20 21:13:28,643 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 21:13:28,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:13:28,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 21:13:28,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2020-07-20 21:13:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 21:13:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2020-07-20 21:13:28,675 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 30 [2020-07-20 21:13:28,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:28,675 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2020-07-20 21:13:28,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:13:28,676 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2020-07-20 21:13:28,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 21:13:28,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:28,680 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:28,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:28,895 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:28,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:28,896 INFO L82 PathProgramCache]: Analyzing trace with hash 640231516, now seen corresponding path program 2 times [2020-07-20 21:13:28,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:28,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024512610] [2020-07-20 21:13:28,897 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 [2020-07-20 21:13:28,979 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:13:28,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:28,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:13:28,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 21:13:29,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:29,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:29,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 21:13:29,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024512610] [2020-07-20 21:13:29,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:29,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 21:13:29,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157209759] [2020-07-20 21:13:29,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 21:13:29,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:29,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 21:13:29,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:13:29,443 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand 11 states. [2020-07-20 21:13:29,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:29,651 INFO L93 Difference]: Finished difference Result 108 states and 173 transitions. [2020-07-20 21:13:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:13:29,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-20 21:13:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:29,660 INFO L225 Difference]: With dead ends: 108 [2020-07-20 21:13:29,660 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 21:13:29,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:13:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 21:13:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-07-20 21:13:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 21:13:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-07-20 21:13:29,708 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 40 [2020-07-20 21:13:29,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:29,709 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-07-20 21:13:29,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 21:13:29,710 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-07-20 21:13:29,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 21:13:29,712 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:29,715 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] [2020-07-20 21:13:29,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:29,929 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:29,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1772916587, now seen corresponding path program 1 times [2020-07-20 21:13:29,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:29,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566968597] [2020-07-20 21:13:29,931 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 [2020-07-20 21:13:29,982 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:29,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:29,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:13:29,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:13:30,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:30,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:30,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:30,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:13:30,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566968597] [2020-07-20 21:13:30,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:30,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 21:13:30,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44329135] [2020-07-20 21:13:30,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 21:13:30,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:30,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 21:13:30,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:13:30,370 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 13 states. [2020-07-20 21:13:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:30,564 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-07-20 21:13:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:13:30,565 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-07-20 21:13:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:30,567 INFO L225 Difference]: With dead ends: 80 [2020-07-20 21:13:30,567 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 21:13:30,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:13:30,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 21:13:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-20 21:13:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 21:13:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2020-07-20 21:13:30,582 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 36 [2020-07-20 21:13:30,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:30,582 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2020-07-20 21:13:30,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 21:13:30,583 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2020-07-20 21:13:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 21:13:30,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:30,585 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:30,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:30,802 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:30,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:30,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1240446734, now seen corresponding path program 3 times [2020-07-20 21:13:30,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:30,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202458820] [2020-07-20 21:13:30,804 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 [2020-07-20 21:13:30,856 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:30,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:30,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:13:30,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 21:13:30,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:31,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 21:13:31,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202458820] [2020-07-20 21:13:31,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:31,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 21:13:31,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69055865] [2020-07-20 21:13:31,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 21:13:31,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:31,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 21:13:31,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:13:31,276 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand 11 states. [2020-07-20 21:13:31,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:31,479 INFO L93 Difference]: Finished difference Result 91 states and 141 transitions. [2020-07-20 21:13:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:13:31,480 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-20 21:13:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:31,482 INFO L225 Difference]: With dead ends: 91 [2020-07-20 21:13:31,482 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 21:13:31,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:13:31,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 21:13:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-07-20 21:13:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 21:13:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-20 21:13:31,513 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 40 [2020-07-20 21:13:31,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:31,514 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-20 21:13:31,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 21:13:31,514 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-20 21:13:31,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 21:13:31,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:31,524 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:31,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:31,738 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:31,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:31,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1471069545, now seen corresponding path program 4 times [2020-07-20 21:13:31,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:31,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417972246] [2020-07-20 21:13:31,740 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 [2020-07-20 21:13:31,798 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:31,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:31,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:13:31,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-07-20 21:13:31,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:32,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:32,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:32,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-20 21:13:32,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417972246] [2020-07-20 21:13:32,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:32,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 21:13:32,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814578964] [2020-07-20 21:13:32,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 21:13:32,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:32,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 21:13:32,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:13:32,310 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 13 states. [2020-07-20 21:13:32,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:32,489 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-07-20 21:13:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:13:32,490 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-07-20 21:13:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:32,492 INFO L225 Difference]: With dead ends: 58 [2020-07-20 21:13:32,492 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 21:13:32,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:13:32,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 21:13:32,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-07-20 21:13:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 21:13:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-07-20 21:13:32,502 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 50 [2020-07-20 21:13:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:32,503 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-07-20 21:13:32,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 21:13:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-07-20 21:13:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 21:13:32,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:32,506 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:32,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:32,722 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:32,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:32,722 INFO L82 PathProgramCache]: Analyzing trace with hash -979408629, now seen corresponding path program 2 times [2020-07-20 21:13:32,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:32,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021504184] [2020-07-20 21:13:32,724 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 [2020-07-20 21:13:32,784 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:32,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:32,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-20 21:13:32,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-20 21:13:32,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 21:13:33,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021504184] [2020-07-20 21:13:33,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:33,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 27 [2020-07-20 21:13:33,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323912563] [2020-07-20 21:13:33,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 21:13:33,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:33,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 21:13:33,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:13:33,621 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 27 states. [2020-07-20 21:13:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:35,368 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2020-07-20 21:13:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 21:13:35,369 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-07-20 21:13:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:35,372 INFO L225 Difference]: With dead ends: 105 [2020-07-20 21:13:35,372 INFO L226 Difference]: Without dead ends: 101 [2020-07-20 21:13:35,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=434, Invalid=2322, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 21:13:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-20 21:13:35,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2020-07-20 21:13:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 21:13:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 115 transitions. [2020-07-20 21:13:35,391 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 115 transitions. Word has length 56 [2020-07-20 21:13:35,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:35,392 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 115 transitions. [2020-07-20 21:13:35,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 21:13:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 115 transitions. [2020-07-20 21:13:35,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 21:13:35,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:35,394 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:35,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:35,610 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:35,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1033208535, now seen corresponding path program 3 times [2020-07-20 21:13:35,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:35,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069104553] [2020-07-20 21:13:35,613 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 [2020-07-20 21:13:35,674 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:35,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:35,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:13:35,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-20 21:13:35,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:35,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:35,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:36,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:36,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:36,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:36,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:36,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:36,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-07-20 21:13:36,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069104553] [2020-07-20 21:13:36,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:36,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:13:36,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616589951] [2020-07-20 21:13:36,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:13:36,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:36,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:13:36,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:13:36,374 INFO L87 Difference]: Start difference. First operand 84 states and 115 transitions. Second operand 17 states. [2020-07-20 21:13:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:36,635 INFO L93 Difference]: Finished difference Result 103 states and 147 transitions. [2020-07-20 21:13:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:13:36,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-07-20 21:13:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:36,642 INFO L225 Difference]: With dead ends: 103 [2020-07-20 21:13:36,643 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 21:13:36,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:13:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 21:13:36,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-07-20 21:13:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 21:13:36,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-07-20 21:13:36,678 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 62 [2020-07-20 21:13:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:36,679 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-07-20 21:13:36,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:13:36,679 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-07-20 21:13:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-20 21:13:36,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:36,684 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:36,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:36,904 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:36,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:36,904 INFO L82 PathProgramCache]: Analyzing trace with hash -633873909, now seen corresponding path program 4 times [2020-07-20 21:13:36,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:36,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635889161] [2020-07-20 21:13:36,906 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 [2020-07-20 21:13:36,984 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:36,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:36,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:13:36,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 48 proven. 125 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2020-07-20 21:13:37,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:37,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:37,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:37,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:37,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:37,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:37,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:37,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 48 proven. 135 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2020-07-20 21:13:37,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635889161] [2020-07-20 21:13:37,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:37,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:13:37,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92101324] [2020-07-20 21:13:37,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:13:37,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:37,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:13:37,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:13:37,854 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 17 states. [2020-07-20 21:13:38,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:38,139 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2020-07-20 21:13:38,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:13:38,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-07-20 21:13:38,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:38,142 INFO L225 Difference]: With dead ends: 85 [2020-07-20 21:13:38,142 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 21:13:38,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 163 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:13:38,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 21:13:38,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2020-07-20 21:13:38,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 21:13:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-07-20 21:13:38,154 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 96 [2020-07-20 21:13:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:38,154 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-07-20 21:13:38,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:13:38,155 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-07-20 21:13:38,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 21:13:38,157 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:38,157 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 10, 9, 9, 9, 9, 9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:38,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:38,373 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:38,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:38,374 INFO L82 PathProgramCache]: Analyzing trace with hash -913129353, now seen corresponding path program 5 times [2020-07-20 21:13:38,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:38,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218257217] [2020-07-20 21:13:38,376 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 [2020-07-20 21:13:38,484 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:13:38,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:38,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 21:13:38,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 153 proven. 192 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-07-20 21:13:38,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:39,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:39,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 153 proven. 213 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2020-07-20 21:13:39,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218257217] [2020-07-20 21:13:39,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:39,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 16 [2020-07-20 21:13:39,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621925728] [2020-07-20 21:13:39,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 21:13:39,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:39,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 21:13:39,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:13:39,317 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 16 states. [2020-07-20 21:13:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:39,629 INFO L93 Difference]: Finished difference Result 130 states and 206 transitions. [2020-07-20 21:13:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 21:13:39,630 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 122 [2020-07-20 21:13:39,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:39,632 INFO L225 Difference]: With dead ends: 130 [2020-07-20 21:13:39,633 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 21:13:39,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:13:39,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 21:13:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-07-20 21:13:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 21:13:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2020-07-20 21:13:39,650 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 122 [2020-07-20 21:13:39,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:39,650 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2020-07-20 21:13:39,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 21:13:39,651 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2020-07-20 21:13:39,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-20 21:13:39,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:39,652 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:39,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:39,868 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:39,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:39,869 INFO L82 PathProgramCache]: Analyzing trace with hash 542454743, now seen corresponding path program 6 times [2020-07-20 21:13:39,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:39,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314187398] [2020-07-20 21:13:39,870 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 [2020-07-20 21:13:39,970 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:39,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:39,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 91 conjunts are in the unsatisfiable core [2020-07-20 21:13:39,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-07-20 21:13:40,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-07-20 21:13:41,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314187398] [2020-07-20 21:13:41,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:41,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 32] total 45 [2020-07-20 21:13:41,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669592192] [2020-07-20 21:13:41,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 21:13:41,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:41,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 21:13:41,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 21:13:41,952 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand 45 states. [2020-07-20 21:13:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:49,366 INFO L93 Difference]: Finished difference Result 211 states and 283 transitions. [2020-07-20 21:13:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-07-20 21:13:49,367 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 102 [2020-07-20 21:13:49,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:49,372 INFO L225 Difference]: With dead ends: 211 [2020-07-20 21:13:49,372 INFO L226 Difference]: Without dead ends: 207 [2020-07-20 21:13:49,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 148 SyntacticMatches, 14 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3229 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1797, Invalid=10413, Unknown=0, NotChecked=0, Total=12210 [2020-07-20 21:13:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-07-20 21:13:49,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2020-07-20 21:13:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-20 21:13:49,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 258 transitions. [2020-07-20 21:13:49,443 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 258 transitions. Word has length 102 [2020-07-20 21:13:49,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:49,445 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 258 transitions. [2020-07-20 21:13:49,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 21:13:49,445 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 258 transitions. [2020-07-20 21:13:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 21:13:49,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:49,451 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:49,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:49,665 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:49,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:49,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1145252683, now seen corresponding path program 7 times [2020-07-20 21:13:49,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:49,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302090111] [2020-07-20 21:13:49,666 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 [2020-07-20 21:13:49,766 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:49,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:49,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:13:49,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 138 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-07-20 21:13:49,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:50,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:50,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:50,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:50,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:50,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:50,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:50,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:50,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:50,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:50,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:50,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 156 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-07-20 21:13:51,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302090111] [2020-07-20 21:13:51,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:51,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 21:13:51,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444529164] [2020-07-20 21:13:51,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:13:51,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:51,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:13:51,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:13:51,038 INFO L87 Difference]: Start difference. First operand 189 states and 258 transitions. Second operand 21 states. [2020-07-20 21:13:51,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:51,378 INFO L93 Difference]: Finished difference Result 215 states and 295 transitions. [2020-07-20 21:13:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:13:51,379 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 108 [2020-07-20 21:13:51,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:51,381 INFO L225 Difference]: With dead ends: 215 [2020-07-20 21:13:51,381 INFO L226 Difference]: Without dead ends: 177 [2020-07-20 21:13:51,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 179 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:13:51,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-20 21:13:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 161. [2020-07-20 21:13:51,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-20 21:13:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 224 transitions. [2020-07-20 21:13:51,402 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 224 transitions. Word has length 108 [2020-07-20 21:13:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:51,402 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 224 transitions. [2020-07-20 21:13:51,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:13:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 224 transitions. [2020-07-20 21:13:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 21:13:51,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:51,405 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 12, 11, 11, 11, 11, 11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:51,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:51,621 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:51,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:51,622 INFO L82 PathProgramCache]: Analyzing trace with hash -370212393, now seen corresponding path program 8 times [2020-07-20 21:13:51,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:51,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068151370] [2020-07-20 21:13:51,623 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 [2020-07-20 21:13:51,763 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:51,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:51,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:13:51,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 233 proven. 268 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-07-20 21:13:51,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:52,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:52,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:52,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:52,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:53,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:53,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:53,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:53,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:53,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:53,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 233 proven. 281 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2020-07-20 21:13:53,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068151370] [2020-07-20 21:13:53,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:53,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:13:53,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023439109] [2020-07-20 21:13:53,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:13:53,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:53,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:13:53,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:13:53,211 INFO L87 Difference]: Start difference. First operand 161 states and 224 transitions. Second operand 19 states. [2020-07-20 21:13:53,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:53,608 INFO L93 Difference]: Finished difference Result 252 states and 375 transitions. [2020-07-20 21:13:53,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 21:13:53,609 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 142 [2020-07-20 21:13:53,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:53,613 INFO L225 Difference]: With dead ends: 252 [2020-07-20 21:13:53,613 INFO L226 Difference]: Without dead ends: 182 [2020-07-20 21:13:53,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 251 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:13:53,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-20 21:13:53,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2020-07-20 21:13:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-07-20 21:13:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 215 transitions. [2020-07-20 21:13:53,640 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 215 transitions. Word has length 142 [2020-07-20 21:13:53,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:53,641 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 215 transitions. [2020-07-20 21:13:53,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:13:53,641 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 215 transitions. [2020-07-20 21:13:53,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-07-20 21:13:53,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:53,646 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:53,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:53,861 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:53,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:53,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2107974185, now seen corresponding path program 9 times [2020-07-20 21:13:53,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:53,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724511615] [2020-07-20 21:13:53,862 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 [2020-07-20 21:13:54,037 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:54,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:54,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:13:54,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 115 proven. 396 refuted. 0 times theorem prover too weak. 1573 trivial. 0 not checked. [2020-07-20 21:13:54,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:54,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:54,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:54,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:55,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:55,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:55,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:55,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:55,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:55,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:55,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 115 proven. 416 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2020-07-20 21:13:55,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724511615] [2020-07-20 21:13:55,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:55,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 21:13:55,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620665411] [2020-07-20 21:13:55,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:13:55,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:55,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:13:55,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:13:55,698 INFO L87 Difference]: Start difference. First operand 158 states and 215 transitions. Second operand 21 states. [2020-07-20 21:13:56,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:56,055 INFO L93 Difference]: Finished difference Result 175 states and 232 transitions. [2020-07-20 21:13:56,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:13:56,056 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 182 [2020-07-20 21:13:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:56,061 INFO L225 Difference]: With dead ends: 175 [2020-07-20 21:13:56,061 INFO L226 Difference]: Without dead ends: 171 [2020-07-20 21:13:56,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 327 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:13:56,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-20 21:13:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 161. [2020-07-20 21:13:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-20 21:13:56,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 218 transitions. [2020-07-20 21:13:56,080 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 218 transitions. Word has length 182 [2020-07-20 21:13:56,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:56,080 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 218 transitions. [2020-07-20 21:13:56,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:13:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 218 transitions. [2020-07-20 21:13:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-07-20 21:13:56,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:56,084 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:56,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:56,298 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:56,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:56,299 INFO L82 PathProgramCache]: Analyzing trace with hash 836851019, now seen corresponding path program 10 times [2020-07-20 21:13:56,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:56,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334689789] [2020-07-20 21:13:56,300 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 [2020-07-20 21:13:56,493 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:56,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:56,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 175 conjunts are in the unsatisfiable core [2020-07-20 21:13:56,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2020-07-20 21:13:56,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:14:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-07-20 21:14:02,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334689789] [2020-07-20 21:14:02,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:14:02,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 58] total 75 [2020-07-20 21:14:02,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482514472] [2020-07-20 21:14:02,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-20 21:14:02,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:14:02,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-20 21:14:02,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=5282, Unknown=0, NotChecked=0, Total=5550 [2020-07-20 21:14:02,279 INFO L87 Difference]: Start difference. First operand 161 states and 218 transitions. Second operand 75 states. [2020-07-20 21:14:02,863 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 49 [2020-07-20 21:14:03,116 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 46 [2020-07-20 21:14:03,369 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 47 [2020-07-20 21:14:03,601 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 43 [2020-07-20 21:14:03,843 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 44 [2020-07-20 21:14:04,063 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 40 [2020-07-20 21:14:04,367 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 41 [2020-07-20 21:14:04,589 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 37 [2020-07-20 21:14:04,808 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 38 [2020-07-20 21:14:05,011 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 34 [2020-07-20 21:14:05,323 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-07-20 21:14:05,504 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2020-07-20 21:14:05,753 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 32 [2020-07-20 21:14:05,925 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 28 [2020-07-20 21:14:06,183 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 29 [2020-07-20 21:14:08,861 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 45 [2020-07-20 21:14:09,250 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 42 [2020-07-20 21:14:09,609 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 39 [2020-07-20 21:14:09,952 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 36 [2020-07-20 21:14:10,279 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 33 [2020-07-20 21:14:10,597 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 30 [2020-07-20 21:14:10,892 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 26 [2020-07-20 21:14:12,984 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 44 [2020-07-20 21:14:13,355 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 46 [2020-07-20 21:14:13,706 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 42 [2020-07-20 21:14:14,064 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 43 [2020-07-20 21:14:14,391 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 39 [2020-07-20 21:14:14,707 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 40 [2020-07-20 21:14:15,005 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 36 [2020-07-20 21:14:15,311 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2020-07-20 21:14:15,586 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 33 [2020-07-20 21:14:15,876 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-07-20 21:14:16,143 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 30 [2020-07-20 21:14:16,420 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 32 [2020-07-20 21:14:16,674 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 26 [2020-07-20 21:14:16,958 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 29 [2020-07-20 21:14:17,194 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 23 [2020-07-20 21:14:17,438 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 26 [2020-07-20 21:14:17,888 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 23 [2020-07-20 21:14:20,547 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 47 [2020-07-20 21:14:20,946 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 50 [2020-07-20 21:14:21,349 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 44 [2020-07-20 21:14:21,743 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 47 [2020-07-20 21:14:22,111 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 41 [2020-07-20 21:14:22,478 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 44 [2020-07-20 21:14:22,818 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2020-07-20 21:14:23,174 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 41 [2020-07-20 21:14:23,509 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-07-20 21:14:23,845 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 38 [2020-07-20 21:14:24,137 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 32 [2020-07-20 21:14:24,441 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 35 [2020-07-20 21:14:24,724 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 30 [2020-07-20 21:14:25,015 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 32 [2020-07-20 21:14:25,240 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 27 [2020-07-20 21:14:25,476 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-20 21:14:25,896 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 27 [2020-07-20 21:14:27,253 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-20 21:14:27,663 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2020-07-20 21:14:28,495 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2020-07-20 21:14:29,055 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 29 [2020-07-20 21:14:30,987 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2020-07-20 21:14:31,351 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2020-07-20 21:14:31,731 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2020-07-20 21:14:32,232 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 50 [2020-07-20 21:14:32,631 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 47 [2020-07-20 21:14:33,005 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 44 [2020-07-20 21:14:33,730 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-07-20 21:14:34,220 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2020-07-20 21:14:34,468 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 7 [2020-07-20 21:14:35,249 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2020-07-20 21:14:35,680 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-07-20 21:14:36,070 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-07-20 21:14:36,405 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-07-20 21:14:37,004 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2020-07-20 21:14:37,802 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 23 [2020-07-20 21:14:38,529 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-07-20 21:14:40,808 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 9 [2020-07-20 21:14:41,101 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 9 [2020-07-20 21:14:41,679 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 44 [2020-07-20 21:14:42,030 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 41 [2020-07-20 21:14:42,566 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2020-07-20 21:14:42,873 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 29 [2020-07-20 21:14:43,398 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 38 [2020-07-20 21:14:44,716 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2020-07-20 21:14:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:14:44,779 INFO L93 Difference]: Finished difference Result 528 states and 796 transitions. [2020-07-20 21:14:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-07-20 21:14:44,780 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 188 [2020-07-20 21:14:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:14:44,787 INFO L225 Difference]: With dead ends: 528 [2020-07-20 21:14:44,787 INFO L226 Difference]: Without dead ends: 524 [2020-07-20 21:14:44,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 262 SyntacticMatches, 42 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16703 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=8020, Invalid=46970, Unknown=0, NotChecked=0, Total=54990 [2020-07-20 21:14:44,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-07-20 21:14:44,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 441. [2020-07-20 21:14:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-07-20 21:14:44,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 635 transitions. [2020-07-20 21:14:44,850 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 635 transitions. Word has length 188 [2020-07-20 21:14:44,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:14:44,851 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 635 transitions. [2020-07-20 21:14:44,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-20 21:14:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 635 transitions. [2020-07-20 21:14:44,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-07-20 21:14:44,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:14:44,856 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:14:45,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:14:45,071 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:14:45,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:14:45,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1322769943, now seen corresponding path program 11 times [2020-07-20 21:14:45,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:14:45,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906114240] [2020-07-20 21:14:45,073 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 [2020-07-20 21:14:45,267 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:14:45,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:14:45,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 21:14:45,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:14:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 415 refuted. 0 times theorem prover too weak. 1592 trivial. 0 not checked. [2020-07-20 21:14:45,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:14:46,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:46,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:46,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:46,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:46,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:46,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:46,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:46,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:47,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:47,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:47,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:47,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:47,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 447 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2020-07-20 21:14:47,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906114240] [2020-07-20 21:14:47,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:14:47,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-20 21:14:47,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617851092] [2020-07-20 21:14:47,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 21:14:47,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:14:47,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 21:14:47,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:14:47,963 INFO L87 Difference]: Start difference. First operand 441 states and 635 transitions. Second operand 25 states. [2020-07-20 21:14:48,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:14:48,490 INFO L93 Difference]: Finished difference Result 502 states and 783 transitions. [2020-07-20 21:14:48,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 21:14:48,491 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 194 [2020-07-20 21:14:48,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:14:48,498 INFO L225 Difference]: With dead ends: 502 [2020-07-20 21:14:48,498 INFO L226 Difference]: Without dead ends: 478 [2020-07-20 21:14:48,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 343 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 21:14:48,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-07-20 21:14:48,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 427. [2020-07-20 21:14:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-07-20 21:14:48,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 618 transitions. [2020-07-20 21:14:48,573 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 618 transitions. Word has length 194 [2020-07-20 21:14:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:14:48,574 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 618 transitions. [2020-07-20 21:14:48,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 21:14:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 618 transitions. [2020-07-20 21:14:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-20 21:14:48,580 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:14:48,581 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:14:48,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:14:48,795 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:14:48,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:14:48,796 INFO L82 PathProgramCache]: Analyzing trace with hash -547968693, now seen corresponding path program 12 times [2020-07-20 21:14:48,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:14:48,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649908209] [2020-07-20 21:14:48,796 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:14:49,131 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:14:49,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:14:49,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1541 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 21:14:49,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:14:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1087 refuted. 0 times theorem prover too weak. 7431 trivial. 0 not checked. [2020-07-20 21:14:49,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:14:49,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:50,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:50,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:52,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:52,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:52,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:52,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:53,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:53,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1121 refuted. 0 times theorem prover too weak. 7397 trivial. 0 not checked. [2020-07-20 21:14:53,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649908209] [2020-07-20 21:14:53,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:14:53,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-20 21:14:53,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854131327] [2020-07-20 21:14:53,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 21:14:53,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:14:53,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 21:14:53,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:14:53,318 INFO L87 Difference]: Start difference. First operand 427 states and 618 transitions. Second operand 25 states. [2020-07-20 21:14:53,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:14:53,846 INFO L93 Difference]: Finished difference Result 478 states and 724 transitions. [2020-07-20 21:14:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 21:14:53,847 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 348 [2020-07-20 21:14:53,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:14:53,853 INFO L225 Difference]: With dead ends: 478 [2020-07-20 21:14:53,854 INFO L226 Difference]: Without dead ends: 443 [2020-07-20 21:14:53,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 651 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 21:14:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-07-20 21:14:53,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 394. [2020-07-20 21:14:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-07-20 21:14:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 572 transitions. [2020-07-20 21:14:53,903 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 572 transitions. Word has length 348 [2020-07-20 21:14:53,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:14:53,904 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 572 transitions. [2020-07-20 21:14:53,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 21:14:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 572 transitions. [2020-07-20 21:14:53,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-07-20 21:14:53,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:14:53,910 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:14:54,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:14:54,125 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:14:54,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:14:54,126 INFO L82 PathProgramCache]: Analyzing trace with hash -604098025, now seen corresponding path program 13 times [2020-07-20 21:14:54,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:14:54,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760391226] [2020-07-20 21:14:54,127 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 [2020-07-20 21:14:54,482 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:14:54,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:14:54,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1555 conjuncts, 339 conjunts are in the unsatisfiable core [2020-07-20 21:14:54,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:14:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 2940 refuted. 0 times theorem prover too weak. 5854 trivial. 0 not checked. [2020-07-20 21:14:55,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:15:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 8644 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-07-20 21:15:13,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760391226] [2020-07-20 21:15:13,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:15:13,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 108] total 129 [2020-07-20 21:15:13,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922755998] [2020-07-20 21:15:13,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2020-07-20 21:15:13,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:15:13,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2020-07-20 21:15:13,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=16060, Unknown=0, NotChecked=0, Total=16512 [2020-07-20 21:15:13,561 INFO L87 Difference]: Start difference. First operand 394 states and 572 transitions. Second operand 129 states. [2020-07-20 21:15:14,155 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 6 [2020-07-20 21:15:15,141 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 97 [2020-07-20 21:15:15,891 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 94 [2020-07-20 21:15:16,754 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 95 [2020-07-20 21:15:17,488 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 91 [2020-07-20 21:15:18,264 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 92 [2020-07-20 21:15:18,939 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 88 [2020-07-20 21:15:19,693 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 89 [2020-07-20 21:15:20,365 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 85 [2020-07-20 21:15:21,147 WARN L193 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 86 [2020-07-20 21:15:21,819 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 82 [2020-07-20 21:15:22,557 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 83 [2020-07-20 21:15:23,191 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 79 [2020-07-20 21:15:24,027 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 80 [2020-07-20 21:15:24,657 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 76 [2020-07-20 21:15:25,460 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 77 [2020-07-20 21:15:26,110 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 73 [2020-07-20 21:15:26,896 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 74 [2020-07-20 21:15:27,485 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 70 [2020-07-20 21:15:28,255 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 71 [2020-07-20 21:15:28,798 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 67 [2020-07-20 21:15:29,506 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 68 [2020-07-20 21:15:30,071 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 64 [2020-07-20 21:15:30,834 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 65 [2020-07-20 21:15:31,356 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 61 [2020-07-20 21:15:32,043 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 62 [2020-07-20 21:15:32,527 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 58 [2020-07-20 21:15:33,172 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 59 [2020-07-20 21:15:33,639 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 55 [2020-07-20 21:15:34,273 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 56 [2020-07-20 21:15:34,746 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 52 [2020-07-20 21:15:35,369 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 53 [2020-07-20 21:15:35,852 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 49 [2020-07-20 21:15:36,450 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 50 [2020-07-20 21:15:36,869 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 46 [2020-07-20 21:15:37,434 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 47 [2020-07-20 21:15:37,830 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 43 [2020-07-20 21:15:38,364 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 44 [2020-07-20 21:15:38,740 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-07-20 21:15:39,253 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 41 [2020-07-20 21:15:39,620 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 37 [2020-07-20 21:15:40,129 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 38 [2020-07-20 21:15:40,454 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 34 [2020-07-20 21:15:40,922 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-07-20 21:15:41,276 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 31 [2020-07-20 21:15:41,737 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 32 [2020-07-20 21:15:42,050 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 28 [2020-07-20 21:15:42,497 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 29 [2020-07-20 21:15:42,790 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 25 [2020-07-20 21:15:43,218 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 26 [2020-07-20 21:15:43,871 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 23 [2020-07-20 21:15:48,025 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 89 [2020-07-20 21:15:49,217 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 86 [2020-07-20 21:15:50,380 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 83 [2020-07-20 21:15:51,498 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 80 [2020-07-20 21:15:52,638 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 77 [2020-07-20 21:15:53,707 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 74 [2020-07-20 21:15:54,727 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 71 [2020-07-20 21:15:55,713 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 68 [2020-07-20 21:15:56,674 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 65 [2020-07-20 21:15:57,644 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 62 [2020-07-20 21:15:58,537 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 59 [2020-07-20 21:15:59,397 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 56 [2020-07-20 21:16:00,241 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 53 [2020-07-20 21:16:01,047 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 51 [2020-07-20 21:16:01,814 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 48 [2020-07-20 21:16:02,547 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 45 [2020-07-20 21:16:03,295 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 42 [2020-07-20 21:16:03,993 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 39 [2020-07-20 21:16:04,635 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 36 [2020-07-20 21:16:05,255 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2020-07-20 21:16:05,853 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2020-07-20 21:16:06,430 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 27 [2020-07-20 21:16:06,971 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 24 [2020-07-20 21:16:07,500 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 21 [2020-07-20 21:16:11,137 WARN L193 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 89 [2020-07-20 21:16:12,356 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 249 DAG size of output: 91 [2020-07-20 21:16:13,566 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 86 [2020-07-20 21:16:14,797 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 242 DAG size of output: 88 [2020-07-20 21:16:15,930 WARN L193 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 83 [2020-07-20 21:16:17,101 WARN L193 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 86 [2020-07-20 21:16:18,205 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 80 [2020-07-20 21:16:19,319 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 83 [2020-07-20 21:16:20,416 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 77 [2020-07-20 21:16:21,513 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 80 [2020-07-20 21:16:22,572 WARN L193 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 74 [2020-07-20 21:16:23,653 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 77 [2020-07-20 21:16:24,656 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 71 [2020-07-20 21:16:25,725 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 74 [2020-07-20 21:16:26,691 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 68 [2020-07-20 21:16:27,719 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 71 [2020-07-20 21:16:28,692 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 65 [2020-07-20 21:16:29,686 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 68 [2020-07-20 21:16:30,610 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 62 [2020-07-20 21:16:31,588 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 65 [2020-07-20 21:16:32,475 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 59 [2020-07-20 21:16:33,398 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 62 [2020-07-20 21:16:34,256 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 56 [2020-07-20 21:16:35,149 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 59 [2020-07-20 21:16:35,986 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 53 [2020-07-20 21:16:36,861 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 56 [2020-07-20 21:16:37,640 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 51 [2020-07-20 21:16:38,461 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 53 [2020-07-20 21:16:39,234 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 48 [2020-07-20 21:16:40,040 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 50 [2020-07-20 21:16:40,776 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 45 [2020-07-20 21:16:41,523 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 47 [2020-07-20 21:16:42,234 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 42 [2020-07-20 21:16:42,973 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 44 [2020-07-20 21:16:43,652 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 39 [2020-07-20 21:16:44,338 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 41 [2020-07-20 21:16:45,002 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 36 [2020-07-20 21:16:45,660 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 38 [2020-07-20 21:16:46,282 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2020-07-20 21:16:46,908 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 35 [2020-07-20 21:16:47,502 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2020-07-20 21:16:48,090 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 32 [2020-07-20 21:16:48,671 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 27 [2020-07-20 21:16:49,259 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 29 [2020-07-20 21:16:49,800 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 24 [2020-07-20 21:16:50,351 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 26 [2020-07-20 21:16:50,865 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 21 [2020-07-20 21:16:51,376 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 23 [2020-07-20 21:16:51,858 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 18 [2020-07-20 21:16:52,347 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 20 [2020-07-20 21:16:53,828 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2020-07-20 21:16:55,667 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-20 21:16:56,398 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2020-07-20 21:16:57,904 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 249 DAG size of output: 91 [2020-07-20 21:16:59,309 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 259 DAG size of output: 94 [2020-07-20 21:17:00,715 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 242 DAG size of output: 88 [2020-07-20 21:17:02,060 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 251 DAG size of output: 91 [2020-07-20 21:17:03,422 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 237 DAG size of output: 85 [2020-07-20 21:17:04,822 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 244 DAG size of output: 88 [2020-07-20 21:17:06,078 WARN L193 SmtUtils]: Spent 962.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 82 [2020-07-20 21:17:07,341 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 239 DAG size of output: 85 [2020-07-20 21:17:08,588 WARN L193 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 79 [2020-07-20 21:17:09,768 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 82 [2020-07-20 21:17:10,967 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 77 [2020-07-20 21:17:12,188 WARN L193 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 79 [2020-07-20 21:17:13,379 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 74 [2020-07-20 21:17:14,544 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 76 [2020-07-20 21:17:15,676 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 71 [2020-07-20 21:17:16,834 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 74 [2020-07-20 21:17:17,870 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 68 [2020-07-20 21:17:18,992 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 71 [2020-07-20 21:17:20,057 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 65 [2020-07-20 21:17:21,139 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 68 [2020-07-20 21:17:22,133 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 62 [2020-07-20 21:17:23,219 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 65 [2020-07-20 21:17:24,209 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 59 [2020-07-20 21:17:25,259 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 62 [2020-07-20 21:17:26,186 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 56 [2020-07-20 21:17:27,182 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 59 [2020-07-20 21:17:28,080 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 53 [2020-07-20 21:17:29,053 WARN L193 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 56 [2020-07-20 21:17:29,938 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 50 [2020-07-20 21:17:30,874 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 53 [2020-07-20 21:17:31,993 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 47 [2020-07-20 21:17:32,900 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 50 [2020-07-20 21:17:33,742 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 44 [2020-07-20 21:17:34,628 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 47 [2020-07-20 21:17:35,453 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 41 [2020-07-20 21:17:36,268 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 44 [2020-07-20 21:17:37,057 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 38 [2020-07-20 21:17:37,849 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 41 [2020-07-20 21:17:38,571 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 35 [2020-07-20 21:17:39,338 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 38 [2020-07-20 21:17:39,992 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 32 [2020-07-20 21:17:40,716 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-07-20 21:17:41,382 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 29 [2020-07-20 21:17:42,052 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 32 [2020-07-20 21:17:42,579 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-20 21:17:43,147 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-07-20 21:17:43,630 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-20 21:17:44,128 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-20 21:17:46,911 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2020-07-20 21:17:47,389 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-20 21:17:47,820 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-20 21:17:48,320 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-07-20 21:17:48,741 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2020-07-20 21:17:49,246 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-20 21:17:49,795 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-07-20 21:17:50,302 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-20 21:17:50,878 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2020-07-20 21:17:54,231 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-07-20 21:17:56,714 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2020-07-20 21:17:57,707 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-20 21:17:58,595 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-20 21:17:59,361 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2020-07-20 21:18:00,306 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2020-07-20 21:18:01,480 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-07-20 21:18:03,015 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-07-20 21:18:04,389 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 62 [2020-07-20 21:18:05,853 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2020-07-20 21:18:07,193 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 53 [2020-07-20 21:18:08,679 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-07-20 21:18:09,988 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2020-07-20 21:18:10,993 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-07-20 21:18:12,370 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 56 [2020-07-20 21:18:13,906 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 65 [2020-07-20 21:18:15,521 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 197 DAG size of output: 86 [2020-07-20 21:18:17,148 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 71 [2020-07-20 21:18:18,822 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 176 DAG size of output: 77 [2020-07-20 21:18:20,595 WARN L193 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 68 [2020-07-20 21:18:22,268 WARN L193 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 74 [2020-07-20 21:18:23,650 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 59 [2020-07-20 21:18:25,230 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 182 DAG size of output: 80 [2020-07-20 21:18:26,956 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 203 DAG size of output: 89 [2020-07-20 21:18:28,841 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 220 DAG size of output: 95 [2020-07-20 21:18:31,016 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 211 DAG size of output: 92 [2020-07-20 21:18:32,778 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 190 DAG size of output: 83 [2020-07-20 21:18:34,755 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 229 DAG size of output: 98 [2020-07-20 21:18:35,883 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2020-07-20 21:18:36,655 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2020-07-20 21:18:38,890 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 259 DAG size of output: 94 [2020-07-20 21:18:41,004 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 268 DAG size of output: 97 [2020-07-20 21:18:43,212 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 251 DAG size of output: 91 [2020-07-20 21:18:45,303 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 260 DAG size of output: 94 [2020-07-20 21:18:47,307 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 244 DAG size of output: 88 [2020-07-20 21:18:49,378 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 252 DAG size of output: 91 [2020-07-20 21:18:51,343 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 239 DAG size of output: 85 [2020-07-20 21:18:53,301 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 245 DAG size of output: 88 [2020-07-20 21:18:55,314 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 232 DAG size of output: 82 [2020-07-20 21:18:57,289 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 240 DAG size of output: 85 [2020-07-20 21:18:59,133 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 224 DAG size of output: 79 [2020-07-20 21:19:01,061 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 233 DAG size of output: 82 [2020-07-20 21:19:02,911 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 219 DAG size of output: 76 [2020-07-20 21:19:04,794 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 225 DAG size of output: 79 [2020-07-20 21:19:06,612 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 213 DAG size of output: 73 [2020-07-20 21:19:08,477 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 220 DAG size of output: 76 [2020-07-20 21:19:10,234 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 204 DAG size of output: 70 [2020-07-20 21:19:12,068 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 214 DAG size of output: 73 [2020-07-20 21:19:14,065 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 258 DAG size of output: 95 [2020-07-20 21:19:16,259 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 266 DAG size of output: 98 [2020-07-20 21:19:18,020 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 196 DAG size of output: 67 [2020-07-20 21:19:19,778 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 205 DAG size of output: 70 [2020-07-20 21:19:21,889 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 250 DAG size of output: 92 [2020-07-20 21:19:23,629 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 190 DAG size of output: 64 [2020-07-20 21:19:25,360 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 197 DAG size of output: 67 [2020-07-20 21:19:27,449 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 243 DAG size of output: 89 [2020-07-20 21:19:29,141 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 183 DAG size of output: 61 [2020-07-20 21:19:30,856 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 191 DAG size of output: 64 [2020-07-20 21:19:32,942 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 238 DAG size of output: 86 [2020-07-20 21:19:34,710 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 175 DAG size of output: 58 [2020-07-20 21:19:36,413 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 184 DAG size of output: 61 [2020-07-20 21:19:38,670 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 231 DAG size of output: 83 [2020-07-20 21:19:40,391 WARN L193 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 55 [2020-07-20 21:19:42,042 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 176 DAG size of output: 58 [2020-07-20 21:19:44,213 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 223 DAG size of output: 80 [2020-07-20 21:19:45,939 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 53 [2020-07-20 21:19:47,519 WARN L193 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 55 [2020-07-20 21:19:49,699 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 218 DAG size of output: 77 [2020-07-20 21:19:51,249 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 51 [2020-07-20 21:19:52,658 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 53 [2020-07-20 21:19:54,045 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 48 [2020-07-20 21:19:55,392 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 51 [2020-07-20 21:19:57,324 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2020-07-20 21:19:58,619 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 48 [2020-07-20 21:20:00,048 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2020-07-20 21:20:01,276 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2020-07-20 21:20:02,517 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2020-07-20 21:20:03,739 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2020-07-20 21:20:05,965 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2020-07-20 21:20:06,655 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2020-07-20 21:20:07,572 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 32 [2020-07-20 21:20:08,323 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2020-07-20 21:20:09,194 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2020-07-20 21:20:12,081 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2020-07-20 21:20:13,249 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2020-07-20 21:20:15,484 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 23 [2020-07-20 21:20:17,455 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 200 DAG size of output: 83 [2020-07-20 21:20:19,345 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 166 DAG size of output: 68 [2020-07-20 21:20:20,774 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 29 [2020-07-20 21:20:22,743 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 179 DAG size of output: 74 [2020-07-20 21:20:24,786 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 149 DAG size of output: 62 [2020-07-20 21:20:26,710 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 157 DAG size of output: 65 [2020-07-20 21:20:28,857 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 173 DAG size of output: 71 [2020-07-20 21:20:30,702 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 143 DAG size of output: 59 [2020-07-20 21:20:32,942 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 187 DAG size of output: 77 [2020-07-20 21:20:34,644 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 44 [2020-07-20 21:20:36,843 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 226 DAG size of output: 92 [2020-07-20 21:20:38,625 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 35 [2020-07-20 21:20:40,439 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 50 [2020-07-20 21:20:42,617 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 208 DAG size of output: 86 [2020-07-20 21:20:44,867 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 217 DAG size of output: 89 [2020-07-20 21:20:47,471 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 38 [2020-07-20 21:20:48,841 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-20 21:20:50,586 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 41 [2020-07-20 21:20:52,628 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 20 [2020-07-20 21:20:54,447 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 47 [2020-07-20 21:20:56,106 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 26 [2020-07-20 21:20:58,195 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 53 [2020-07-20 21:21:00,429 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 14 [2020-07-20 21:21:01,704 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2020-07-20 21:21:11,902 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2020-07-20 21:21:13,723 WARN L193 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 53 [2020-07-20 21:21:15,591 WARN L193 SmtUtils]: Spent 925.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 50 [2020-07-20 21:21:17,528 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2020-07-20 21:21:18,926 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 47 [2020-07-20 21:21:20,636 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2020-07-20 21:21:21,759 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2020-07-20 21:21:23,979 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2020-07-20 21:21:26,326 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 41 [2020-07-20 21:21:58,281 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 231 DAG size of output: 98 [2020-07-20 21:21:59,656 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 224 DAG size of output: 7 [2020-07-20 21:22:00,637 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 6 [2020-07-20 21:22:01,611 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 21:22:04,865 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 222 DAG size of output: 95 [2020-07-20 21:22:07,820 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 213 DAG size of output: 92 [2020-07-20 21:22:10,501 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 205 DAG size of output: 89 [2020-07-20 21:22:13,650 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 199 DAG size of output: 86 [2020-07-20 21:22:16,312 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 192 DAG size of output: 83 [2020-07-20 21:22:19,155 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 184 DAG size of output: 80 [2020-07-20 21:22:22,018 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 178 DAG size of output: 77 [2020-07-20 21:22:24,786 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 171 DAG size of output: 74 [2020-07-20 21:22:30,161 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 127 DAG size of output: 56 [2020-07-20 21:22:33,058 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 162 DAG size of output: 71 [2020-07-20 21:22:35,900 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 154 DAG size of output: 68 [2020-07-20 21:22:38,314 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 148 DAG size of output: 65 [2020-07-20 21:22:40,643 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 141 DAG size of output: 62 [2020-07-20 21:22:43,349 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 133 DAG size of output: 59 [2020-07-20 21:22:47,304 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 136 DAG size of output: 56 [2020-07-20 21:22:50,034 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 194 DAG size of output: 80 [2020-07-20 21:22:51,833 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2020-07-20 21:22:53,750 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 38 [2020-07-20 21:23:04,737 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 21:23:05,802 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 21:23:06,972 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 21:23:08,025 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 21:23:09,186 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 21:23:10,299 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 21:23:11,492 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 21:23:12,552 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 8 [2020-07-20 21:23:14,221 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 226 DAG size of output: 9 [2020-07-20 21:23:15,888 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 226 DAG size of output: 9 [2020-07-20 21:23:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:23:16,367 INFO L93 Difference]: Finished difference Result 1231 states and 2149 transitions. [2020-07-20 21:23:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2020-07-20 21:23:16,373 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 354 [2020-07-20 21:23:16,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:23:16,389 INFO L225 Difference]: With dead ends: 1231 [2020-07-20 21:23:16,390 INFO L226 Difference]: Without dead ends: 1227 [2020-07-20 21:23:16,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1097 GetRequests, 516 SyntacticMatches, 66 SemanticMatches, 515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88265 ImplicationChecksByTransitivity, 368.7s TimeCoverageRelationStatistics Valid=38389, Invalid=228383, Unknown=0, NotChecked=0, Total=266772 [2020-07-20 21:23:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2020-07-20 21:23:16,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1036. [2020-07-20 21:23:16,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1036 states. [2020-07-20 21:23:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1613 transitions. [2020-07-20 21:23:16,613 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1613 transitions. Word has length 354 [2020-07-20 21:23:16,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:23:16,614 INFO L479 AbstractCegarLoop]: Abstraction has 1036 states and 1613 transitions. [2020-07-20 21:23:16,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 129 states. [2020-07-20 21:23:16,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1613 transitions. [2020-07-20 21:23:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-07-20 21:23:16,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:23:16,627 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:23:16,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:23:16,842 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:23:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:23:16,843 INFO L82 PathProgramCache]: Analyzing trace with hash 800684683, now seen corresponding path program 14 times [2020-07-20 21:23:16,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:23:16,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857074481] [2020-07-20 21:23:16,845 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 [2020-07-20 21:23:17,831 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:23:17,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:23:17,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 21:23:17,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:23:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1112 refuted. 0 times theorem prover too weak. 7456 trivial. 0 not checked. [2020-07-20 21:23:18,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:23:19,876 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 21:23:21,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:21,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:22,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:22,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:22,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:23,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:23,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:25,483 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 21:23:26,595 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 21:23:31,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:31,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:34,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:34,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:35,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:35,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:36,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1162 refuted. 0 times theorem prover too weak. 7406 trivial. 0 not checked. [2020-07-20 21:23:36,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857074481] [2020-07-20 21:23:36,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:23:36,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-20 21:23:36,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245271641] [2020-07-20 21:23:36,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 21:23:36,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:23:36,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 21:23:36,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:23:36,294 INFO L87 Difference]: Start difference. First operand 1036 states and 1613 transitions. Second operand 29 states. [2020-07-20 21:23:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:23:38,785 INFO L93 Difference]: Finished difference Result 1221 states and 2313 transitions. [2020-07-20 21:23:38,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 21:23:38,798 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 360 [2020-07-20 21:23:38,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:23:38,813 INFO L225 Difference]: With dead ends: 1221 [2020-07-20 21:23:38,813 INFO L226 Difference]: Without dead ends: 1194 [2020-07-20 21:23:38,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 667 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=319, Invalid=1321, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 21:23:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2020-07-20 21:23:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1024. [2020-07-20 21:23:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-07-20 21:23:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1655 transitions. [2020-07-20 21:23:39,000 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1655 transitions. Word has length 360 [2020-07-20 21:23:39,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:23:39,002 INFO L479 AbstractCegarLoop]: Abstraction has 1024 states and 1655 transitions. [2020-07-20 21:23:39,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 21:23:39,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1655 transitions. [2020-07-20 21:23:39,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-07-20 21:23:39,018 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:23:39,019 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 40, 39, 39, 39, 39, 39, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:23:39,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:23:39,235 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:23:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:23:39,235 INFO L82 PathProgramCache]: Analyzing trace with hash 548363287, now seen corresponding path program 15 times [2020-07-20 21:23:39,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:23:39,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326932743] [2020-07-20 21:23:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:23:39,644 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:23:39,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:23:39,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 1760 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-20 21:23:39,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:23:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13858 backedges. 967 proven. 1942 refuted. 0 times theorem prover too weak. 10949 trivial. 0 not checked. [2020-07-20 21:23:40,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:23:54,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:55,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:55,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:55,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13858 backedges. 967 proven. 2015 refuted. 0 times theorem prover too weak. 10876 trivial. 0 not checked. [2020-07-20 21:23:56,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326932743] [2020-07-20 21:23:56,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:23:56,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-20 21:23:56,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143611887] [2020-07-20 21:23:56,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:23:56,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:23:56,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:23:56,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:23:56,120 INFO L87 Difference]: Start difference. First operand 1024 states and 1655 transitions. Second operand 24 states. [2020-07-20 21:23:59,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:23:59,620 INFO L93 Difference]: Finished difference Result 2081 states and 3730 transitions. [2020-07-20 21:23:59,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 21:23:59,628 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 434 [2020-07-20 21:23:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:23:59,641 INFO L225 Difference]: With dead ends: 2081 [2020-07-20 21:23:59,641 INFO L226 Difference]: Without dead ends: 1307 [2020-07-20 21:23:59,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 845 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=375, Invalid=1031, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 21:23:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2020-07-20 21:23:59,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 981. [2020-07-20 21:23:59,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2020-07-20 21:23:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1359 transitions. [2020-07-20 21:23:59,797 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1359 transitions. Word has length 434 [2020-07-20 21:23:59,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:23:59,797 INFO L479 AbstractCegarLoop]: Abstraction has 981 states and 1359 transitions. [2020-07-20 21:23:59,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:23:59,797 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1359 transitions. [2020-07-20 21:23:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2020-07-20 21:23:59,808 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:23:59,809 INFO L422 BasicCegarLoop]: trace histogram [95, 95, 48, 47, 47, 47, 47, 47, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:24:00,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:24:00,023 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:24:00,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:24:00,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1908418025, now seen corresponding path program 16 times [2020-07-20 21:24:00,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:24:00,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011361685] [2020-07-20 21:24:00,024 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 [2020-07-20 21:24:00,537 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:24:00,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:24:00,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 2299 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 21:24:00,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:24:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20074 backedges. 1640 proven. 2215 refuted. 0 times theorem prover too weak. 16219 trivial. 0 not checked. [2020-07-20 21:24:01,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:24:10,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:10,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:11,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:11,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:12,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:12,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:12,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:15,238 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 21:24:15,345 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 21:24:15,464 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:24:15,593 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:24:15,717 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:24:15,830 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:24:15,935 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:24:21,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:21,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:23,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:23,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:24,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:24,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:25,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:25,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:25,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20074 backedges. 1640 proven. 2256 refuted. 0 times theorem prover too weak. 16178 trivial. 0 not checked. [2020-07-20 21:24:25,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011361685] [2020-07-20 21:24:25,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:24:25,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 27 [2020-07-20 21:24:25,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760173539] [2020-07-20 21:24:25,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 21:24:25,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:24:25,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 21:24:25,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:24:25,945 INFO L87 Difference]: Start difference. First operand 981 states and 1359 transitions. Second operand 27 states. [2020-07-20 21:24:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:24:28,907 INFO L93 Difference]: Finished difference Result 1347 states and 1939 transitions. [2020-07-20 21:24:28,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 21:24:28,916 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 514 [2020-07-20 21:24:28,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:24:28,928 INFO L225 Difference]: With dead ends: 1347 [2020-07-20 21:24:28,928 INFO L226 Difference]: Without dead ends: 1181 [2020-07-20 21:24:28,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 979 SyntacticMatches, 23 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=489, Invalid=1403, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 21:24:28,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2020-07-20 21:24:29,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 978. [2020-07-20 21:24:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2020-07-20 21:24:29,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1326 transitions. [2020-07-20 21:24:29,105 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1326 transitions. Word has length 514 [2020-07-20 21:24:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:24:29,106 INFO L479 AbstractCegarLoop]: Abstraction has 978 states and 1326 transitions. [2020-07-20 21:24:29,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 21:24:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1326 transitions. [2020-07-20 21:24:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2020-07-20 21:24:29,119 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:24:29,120 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 64, 63, 63, 63, 63, 63, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:24:29,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:24:29,335 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:24:29,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:24:29,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2099436055, now seen corresponding path program 17 times [2020-07-20 21:24:29,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:24:29,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740615795] [2020-07-20 21:24:29,336 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 [2020-07-20 21:24:30,018 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:24:30,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:24:30,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 3043 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 21:24:30,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:24:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 35962 backedges. 537 proven. 2750 refuted. 0 times theorem prover too weak. 32675 trivial. 0 not checked. [2020-07-20 21:24:30,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:24:33,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:33,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:33,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:33,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:34,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:34,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:34,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:49,886 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:24:50,008 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:24:50,123 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:24:50,229 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:24:50,336 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:24:50,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:50,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:56,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:56,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:58,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:58,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:59,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:59,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:00,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:00,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 35962 backedges. 537 proven. 2802 refuted. 0 times theorem prover too weak. 32623 trivial. 0 not checked. [2020-07-20 21:25:01,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740615795] [2020-07-20 21:25:01,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:25:01,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-20 21:25:01,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20020558] [2020-07-20 21:25:01,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 21:25:01,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:25:01,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 21:25:01,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:25:01,208 INFO L87 Difference]: Start difference. First operand 978 states and 1326 transitions. Second operand 29 states. [2020-07-20 21:25:03,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:25:03,376 INFO L93 Difference]: Finished difference Result 1043 states and 1391 transitions. [2020-07-20 21:25:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 21:25:03,386 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 674 [2020-07-20 21:25:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:25:03,397 INFO L225 Difference]: With dead ends: 1043 [2020-07-20 21:25:03,398 INFO L226 Difference]: Without dead ends: 1039 [2020-07-20 21:25:03,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1359 GetRequests, 1295 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=325, Invalid=1315, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 21:25:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2020-07-20 21:25:03,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 981. [2020-07-20 21:25:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2020-07-20 21:25:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1329 transitions. [2020-07-20 21:25:03,556 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1329 transitions. Word has length 674 [2020-07-20 21:25:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:25:03,558 INFO L479 AbstractCegarLoop]: Abstraction has 981 states and 1329 transitions. [2020-07-20 21:25:03,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 21:25:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1329 transitions. [2020-07-20 21:25:03,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2020-07-20 21:25:03,573 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:25:03,574 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 64, 63, 63, 63, 63, 63, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:25:03,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:25:03,788 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:25:03,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:25:03,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2092966539, now seen corresponding path program 18 times [2020-07-20 21:25:03,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:25:03,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358392484] [2020-07-20 21:25:03,790 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 [2020-07-20 21:25:04,530 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:25:04,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:25:04,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 3054 conjuncts, 663 conjunts are in the unsatisfiable core [2020-07-20 21:25:04,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:25:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 35990 backedges. 0 proven. 12010 refuted. 0 times theorem prover too weak. 23980 trivial. 0 not checked. [2020-07-20 21:25:10,696 INFO L328 TraceCheckSpWp]: Computing backward predicates...