/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 NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:45:25,707 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 15:45:25,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:45:25,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:45:25,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:45:25,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:45:25,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:45:25,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:45:25,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:45:25,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:45:25,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:45:25,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:45:25,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:45:25,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:45:25,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:45:25,801 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 15:45:25,832 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:45:25,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:45:25,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:45:25,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:45:25,835 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:45:25,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:45:25,835 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:45:25,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:45:25,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:45:25,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:45:25,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:45:25,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:45:25,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:45:25,840 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:45:25,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:45:25,840 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:45:25,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:45:25,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:45:25,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:45:25,841 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:45:25,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:45:25,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:45:25,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:45:25,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:45:25,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:45:25,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:45:25,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:25,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:45:25,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:45:25,846 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 -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 15:45:26,138 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:45:26,155 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:45:26,159 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:45:26,160 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:45:26,162 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:45:26,163 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi01.c [2020-07-21 15:45:26,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc956efd3/1dba185364064d88b73e3889abf2358d/FLAG9d19cf26b [2020-07-21 15:45:26,729 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:45:26,732 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi01.c [2020-07-21 15:45:26,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc956efd3/1dba185364064d88b73e3889abf2358d/FLAG9d19cf26b [2020-07-21 15:45:27,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc956efd3/1dba185364064d88b73e3889abf2358d [2020-07-21 15:45:27,148 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:45:27,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:45:27,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:27,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:45:27,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:45:27,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:27" (1/1) ... [2020-07-21 15:45:27,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e369ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:27, skipping insertion in model container [2020-07-21 15:45:27,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:27" (1/1) ... [2020-07-21 15:45:27,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:45:27,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:45:27,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:27,351 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:45:27,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:27,383 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:45:27,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:27 WrapperNode [2020-07-21 15:45:27,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:27,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:45:27,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:45:27,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:45:27,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:27" (1/1) ... [2020-07-21 15:45:27,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:27" (1/1) ... [2020-07-21 15:45:27,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:27" (1/1) ... [2020-07-21 15:45:27,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:27" (1/1) ... [2020-07-21 15:45:27,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:27" (1/1) ... [2020-07-21 15:45:27,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:27" (1/1) ... [2020-07-21 15:45:27,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:27" (1/1) ... [2020-07-21 15:45:27,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:45:27,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:45:27,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:45:27,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:45:27,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:45:27,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:45:27,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:45:27,548 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-21 15:45:27,548 INFO L138 BoogieDeclarations]: Found implementation of procedure applyHanoi [2020-07-21 15:45:27,548 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:45:27,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:45:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:45:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-21 15:45:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure applyHanoi [2020-07-21 15:45:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:45:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:45:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:45:27,757 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:45:27,758 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 15:45:27,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:27 BoogieIcfgContainer [2020-07-21 15:45:27,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:45:27,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:45:27,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:45:27,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:45:27,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:45:27" (1/3) ... [2020-07-21 15:45:27,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdcfc08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:27, skipping insertion in model container [2020-07-21 15:45:27,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:27" (2/3) ... [2020-07-21 15:45:27,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdcfc08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:27, skipping insertion in model container [2020-07-21 15:45:27,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:27" (3/3) ... [2020-07-21 15:45:27,771 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi01.c [2020-07-21 15:45:27,782 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:45:27,800 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:45:27,844 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:45:27,890 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:45:27,891 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:45:27,891 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:45:27,891 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:45:27,891 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:45:27,891 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:45:27,892 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:45:27,892 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:45:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 15:45:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 15:45:27,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:27,916 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] [2020-07-21 15:45:27,916 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:27,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:27,922 INFO L82 PathProgramCache]: Analyzing trace with hash -629617454, now seen corresponding path program 1 times [2020-07-21 15:45:27,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:27,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916422255] [2020-07-21 15:45:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:28,014 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:28,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:28,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:45:28,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:45:28,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:28,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916422255] [2020-07-21 15:45:28,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:28,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:45:28,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644113145] [2020-07-21 15:45:28,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:45:28,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:28,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:45:28,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:45:28,121 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-07-21 15:45:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:28,218 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-07-21 15:45:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:45:28,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 15:45:28,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:28,232 INFO L225 Difference]: With dead ends: 48 [2020-07-21 15:45:28,232 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 15:45:28,236 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 [2020-07-21 15:45:28,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 15:45:28,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 15:45:28,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 15:45:28,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-07-21 15:45:28,288 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 20 [2020-07-21 15:45:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:28,289 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-07-21 15:45:28,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:45:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-07-21 15:45:28,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 15:45:28,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:28,292 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] [2020-07-21 15:45:28,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:28,506 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:28,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:28,507 INFO L82 PathProgramCache]: Analyzing trace with hash 223523063, now seen corresponding path program 1 times [2020-07-21 15:45:28,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:28,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39928087] [2020-07-21 15:45:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:28,581 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:28,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:28,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 15:45:28,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-21 15:45:28,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 15:45:28,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39928087] [2020-07-21 15:45:28,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:28,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2020-07-21 15:45:28,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438538249] [2020-07-21 15:45:28,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 15:45:28,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:28,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 15:45:28,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:45:28,911 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 15 states. [2020-07-21 15:45:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:29,516 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2020-07-21 15:45:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 15:45:29,517 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-07-21 15:45:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:29,520 INFO L225 Difference]: With dead ends: 78 [2020-07-21 15:45:29,520 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 15:45:29,522 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 [2020-07-21 15:45:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 15:45:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2020-07-21 15:45:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 15:45:29,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2020-07-21 15:45:29,549 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 30 [2020-07-21 15:45:29,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:29,549 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2020-07-21 15:45:29,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 15:45:29,550 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2020-07-21 15:45:29,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 15:45:29,552 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:29,553 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] [2020-07-21 15:45:29,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:29,766 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:29,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:29,767 INFO L82 PathProgramCache]: Analyzing trace with hash 640231516, now seen corresponding path program 2 times [2020-07-21 15:45:29,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:29,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961615555] [2020-07-21 15:45:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:29,814 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:29,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:29,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 15:45:29,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 15:45:29,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-21 15:45:30,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961615555] [2020-07-21 15:45:30,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:30,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2020-07-21 15:45:30,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361204734] [2020-07-21 15:45:30,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:45:30,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:30,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:45:30,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:45:30,117 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand 12 states. [2020-07-21 15:45:30,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:30,314 INFO L93 Difference]: Finished difference Result 99 states and 150 transitions. [2020-07-21 15:45:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:45:30,315 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 15:45:30,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:30,317 INFO L225 Difference]: With dead ends: 99 [2020-07-21 15:45:30,317 INFO L226 Difference]: Without dead ends: 71 [2020-07-21 15:45:30,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:45:30,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-21 15:45:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2020-07-21 15:45:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-21 15:45:30,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2020-07-21 15:45:30,332 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 40 [2020-07-21 15:45:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:30,333 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2020-07-21 15:45:30,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:45:30,333 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2020-07-21 15:45:30,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 15:45:30,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:30,335 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] [2020-07-21 15:45:30,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:30,549 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:30,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1772916587, now seen corresponding path program 1 times [2020-07-21 15:45:30,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:30,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271854369] [2020-07-21 15:45:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:30,589 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:30,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:30,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:45:30,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:45:30,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:30,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:30,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:30,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 15:45:30,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271854369] [2020-07-21 15:45:30,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:30,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 15:45:30,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217763667] [2020-07-21 15:45:30,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 15:45:30,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:30,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 15:45:30,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 15:45:30,984 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand 13 states. [2020-07-21 15:45:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:31,153 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2020-07-21 15:45:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:45:31,154 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-07-21 15:45:31,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:31,156 INFO L225 Difference]: With dead ends: 62 [2020-07-21 15:45:31,156 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 15:45:31,162 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 [2020-07-21 15:45:31,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 15:45:31,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-07-21 15:45:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 15:45:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-07-21 15:45:31,180 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 36 [2020-07-21 15:45:31,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:31,181 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-07-21 15:45:31,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 15:45:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-07-21 15:45:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 15:45:31,186 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:31,186 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] [2020-07-21 15:45:31,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:31,401 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:31,402 INFO L82 PathProgramCache]: Analyzing trace with hash -979408629, now seen corresponding path program 2 times [2020-07-21 15:45:31,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:31,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837493109] [2020-07-21 15:45:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:31,458 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:31,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:31,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 15:45:31,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-21 15:45:31,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-21 15:45:32,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837493109] [2020-07-21 15:45:32,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:32,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 27 [2020-07-21 15:45:32,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744236604] [2020-07-21 15:45:32,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 15:45:32,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:32,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 15:45:32,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-07-21 15:45:32,213 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 27 states. [2020-07-21 15:45:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:34,381 INFO L93 Difference]: Finished difference Result 119 states and 227 transitions. [2020-07-21 15:45:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 15:45:34,382 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-07-21 15:45:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:34,387 INFO L225 Difference]: With dead ends: 119 [2020-07-21 15:45:34,387 INFO L226 Difference]: Without dead ends: 115 [2020-07-21 15:45:34,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=434, Invalid=2322, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 15:45:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-21 15:45:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2020-07-21 15:45:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 15:45:34,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 130 transitions. [2020-07-21 15:45:34,419 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 130 transitions. Word has length 56 [2020-07-21 15:45:34,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:34,419 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 130 transitions. [2020-07-21 15:45:34,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 15:45:34,420 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 130 transitions. [2020-07-21 15:45:34,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-21 15:45:34,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:34,423 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:34,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:34,639 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:34,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1737443792, now seen corresponding path program 3 times [2020-07-21 15:45:34,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:34,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439119746] [2020-07-21 15:45:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:34,693 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:34,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:34,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 15:45:34,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 48 proven. 24 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-21 15:45:34,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:34,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 48 proven. 30 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-07-21 15:45:35,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439119746] [2020-07-21 15:45:35,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:35,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 15:45:35,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814749329] [2020-07-21 15:45:35,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 15:45:35,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:35,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 15:45:35,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:45:35,117 INFO L87 Difference]: Start difference. First operand 82 states and 130 transitions. Second operand 15 states. [2020-07-21 15:45:35,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:35,504 INFO L93 Difference]: Finished difference Result 147 states and 281 transitions. [2020-07-21 15:45:35,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 15:45:35,504 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-07-21 15:45:35,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:35,507 INFO L225 Difference]: With dead ends: 147 [2020-07-21 15:45:35,507 INFO L226 Difference]: Without dead ends: 104 [2020-07-21 15:45:35,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-07-21 15:45:35,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-21 15:45:35,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2020-07-21 15:45:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 15:45:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 129 transitions. [2020-07-21 15:45:35,527 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 129 transitions. Word has length 66 [2020-07-21 15:45:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:35,527 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 129 transitions. [2020-07-21 15:45:35,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 15:45:35,528 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 129 transitions. [2020-07-21 15:45:35,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-21 15:45:35,530 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:35,531 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] [2020-07-21 15:45:35,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:35,736 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:35,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1033208535, now seen corresponding path program 4 times [2020-07-21 15:45:35,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:35,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358046358] [2020-07-21 15:45:35,738 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:35,798 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:35,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:35,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:45:35,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-21 15:45:35,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:36,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:36,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:36,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:36,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:36,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:36,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-07-21 15:45:36,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358046358] [2020-07-21 15:45:36,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:36,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 15:45:36,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866038409] [2020-07-21 15:45:36,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 15:45:36,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:36,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 15:45:36,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:45:36,454 INFO L87 Difference]: Start difference. First operand 80 states and 129 transitions. Second operand 17 states. [2020-07-21 15:45:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:36,669 INFO L93 Difference]: Finished difference Result 98 states and 171 transitions. [2020-07-21 15:45:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:45:36,669 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-07-21 15:45:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:36,672 INFO L225 Difference]: With dead ends: 98 [2020-07-21 15:45:36,672 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 15:45:36,673 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 [2020-07-21 15:45:36,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 15:45:36,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-07-21 15:45:36,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 15:45:36,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 106 transitions. [2020-07-21 15:45:36,686 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 106 transitions. Word has length 62 [2020-07-21 15:45:36,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:36,686 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 106 transitions. [2020-07-21 15:45:36,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 15:45:36,686 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 106 transitions. [2020-07-21 15:45:36,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-21 15:45:36,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:36,688 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] [2020-07-21 15:45:36,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:36,904 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:36,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:36,905 INFO L82 PathProgramCache]: Analyzing trace with hash 542454743, now seen corresponding path program 5 times [2020-07-21 15:45:36,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:36,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657156231] [2020-07-21 15:45:36,907 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:36,986 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:36,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:36,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 91 conjunts are in the unsatisfiable core [2020-07-21 15:45:36,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-07-21 15:45:37,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-07-21 15:45:38,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657156231] [2020-07-21 15:45:38,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:38,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 32] total 45 [2020-07-21 15:45:38,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820461867] [2020-07-21 15:45:38,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-21 15:45:38,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:38,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-21 15:45:38,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 15:45:38,835 INFO L87 Difference]: Start difference. First operand 69 states and 106 transitions. Second operand 45 states. [2020-07-21 15:45:41,177 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 26 [2020-07-21 15:45:48,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:48,003 INFO L93 Difference]: Finished difference Result 244 states and 431 transitions. [2020-07-21 15:45:48,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-07-21 15:45:48,005 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 102 [2020-07-21 15:45:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:48,010 INFO L225 Difference]: With dead ends: 244 [2020-07-21 15:45:48,010 INFO L226 Difference]: Without dead ends: 240 [2020-07-21 15:45:48,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3387 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1875, Invalid=10781, Unknown=0, NotChecked=0, Total=12656 [2020-07-21 15:45:48,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-07-21 15:45:48,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 189. [2020-07-21 15:45:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-21 15:45:48,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 315 transitions. [2020-07-21 15:45:48,056 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 315 transitions. Word has length 102 [2020-07-21 15:45:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:48,058 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 315 transitions. [2020-07-21 15:45:48,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-21 15:45:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 315 transitions. [2020-07-21 15:45:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 15:45:48,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:48,065 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] [2020-07-21 15:45:48,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:48,271 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:48,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:48,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1145252683, now seen corresponding path program 6 times [2020-07-21 15:45:48,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:48,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182716176] [2020-07-21 15:45:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:48,357 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:48,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:48,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:45:48,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 138 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-07-21 15:45:48,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:48,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:48,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:48,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:48,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:48,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:48,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:49,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:49,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:49,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:49,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:49,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 156 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-07-21 15:45:49,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182716176] [2020-07-21 15:45:49,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:49,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 15:45:49,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975448540] [2020-07-21 15:45:49,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:45:49,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:49,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:45:49,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:45:49,578 INFO L87 Difference]: Start difference. First operand 189 states and 315 transitions. Second operand 21 states. [2020-07-21 15:45:49,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:49,889 INFO L93 Difference]: Finished difference Result 244 states and 510 transitions. [2020-07-21 15:45:49,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 15:45:49,890 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 108 [2020-07-21 15:45:49,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:49,896 INFO L225 Difference]: With dead ends: 244 [2020-07-21 15:45:49,896 INFO L226 Difference]: Without dead ends: 223 [2020-07-21 15:45:49,897 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 [2020-07-21 15:45:49,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-21 15:45:49,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 187. [2020-07-21 15:45:49,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-21 15:45:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 348 transitions. [2020-07-21 15:45:49,965 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 348 transitions. Word has length 108 [2020-07-21 15:45:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:49,965 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 348 transitions. [2020-07-21 15:45:49,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:45:49,965 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 348 transitions. [2020-07-21 15:45:49,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-07-21 15:45:49,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:49,970 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] [2020-07-21 15:45:50,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:50,186 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:50,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:50,187 INFO L82 PathProgramCache]: Analyzing trace with hash -2107974185, now seen corresponding path program 7 times [2020-07-21 15:45:50,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:50,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940611237] [2020-07-21 15:45:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:50,336 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:50,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:50,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-21 15:45:50,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 97 proven. 343 refuted. 0 times theorem prover too weak. 1644 trivial. 0 not checked. [2020-07-21 15:45:50,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:50,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:50,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 97 proven. 356 refuted. 0 times theorem prover too weak. 1631 trivial. 0 not checked. [2020-07-21 15:45:51,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940611237] [2020-07-21 15:45:51,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:51,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 15:45:51,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112595311] [2020-07-21 15:45:51,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 15:45:51,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:51,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 15:45:51,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:45:51,323 INFO L87 Difference]: Start difference. First operand 187 states and 348 transitions. Second operand 19 states. [2020-07-21 15:45:51,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:51,971 INFO L93 Difference]: Finished difference Result 372 states and 874 transitions. [2020-07-21 15:45:51,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 15:45:51,972 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 182 [2020-07-21 15:45:51,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:51,977 INFO L225 Difference]: With dead ends: 372 [2020-07-21 15:45:51,977 INFO L226 Difference]: Without dead ends: 207 [2020-07-21 15:45:51,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 15:45:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-07-21 15:45:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 180. [2020-07-21 15:45:52,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-21 15:45:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 328 transitions. [2020-07-21 15:45:52,009 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 328 transitions. Word has length 182 [2020-07-21 15:45:52,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:52,011 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 328 transitions. [2020-07-21 15:45:52,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 15:45:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 328 transitions. [2020-07-21 15:45:52,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-07-21 15:45:52,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:52,017 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] [2020-07-21 15:45:52,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:52,232 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:52,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:52,233 INFO L82 PathProgramCache]: Analyzing trace with hash 836851019, now seen corresponding path program 8 times [2020-07-21 15:45:52,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:52,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827358816] [2020-07-21 15:45:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:52,385 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:52,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:52,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 175 conjunts are in the unsatisfiable core [2020-07-21 15:45:52,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2020-07-21 15:45:52,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-07-21 15:45:57,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827358816] [2020-07-21 15:45:57,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:57,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 58] total 75 [2020-07-21 15:45:57,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316091131] [2020-07-21 15:45:57,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-21 15:45:57,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:57,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-21 15:45:57,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=5282, Unknown=0, NotChecked=0, Total=5550 [2020-07-21 15:45:57,557 INFO L87 Difference]: Start difference. First operand 180 states and 328 transitions. Second operand 75 states. [2020-07-21 15:45:58,087 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 49 [2020-07-21 15:45:58,332 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 46 [2020-07-21 15:45:58,572 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 47 [2020-07-21 15:45:58,794 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 43 [2020-07-21 15:45:59,013 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 44 [2020-07-21 15:45:59,210 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 40 [2020-07-21 15:45:59,427 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 41 [2020-07-21 15:45:59,615 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 37 [2020-07-21 15:45:59,831 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 38 [2020-07-21 15:46:00,000 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 34 [2020-07-21 15:46:00,250 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 36 [2020-07-21 15:46:00,452 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2020-07-21 15:46:00,721 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 33 [2020-07-21 15:46:01,123 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 30 [2020-07-21 15:46:03,593 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 45 [2020-07-21 15:46:03,943 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 42 [2020-07-21 15:46:04,270 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 39 [2020-07-21 15:46:04,593 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 36 [2020-07-21 15:46:04,883 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 33 [2020-07-21 15:46:05,161 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 30 [2020-07-21 15:46:05,429 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 27 [2020-07-21 15:46:05,711 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 24 [2020-07-21 15:46:06,922 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 43 [2020-07-21 15:46:07,254 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 46 [2020-07-21 15:46:07,572 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 41 [2020-07-21 15:46:07,886 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 43 [2020-07-21 15:46:08,195 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 38 [2020-07-21 15:46:08,476 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 40 [2020-07-21 15:46:08,743 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 35 [2020-07-21 15:46:09,025 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2020-07-21 15:46:09,281 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 32 [2020-07-21 15:46:09,533 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-07-21 15:46:09,772 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 29 [2020-07-21 15:46:10,021 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 32 [2020-07-21 15:46:10,264 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 26 [2020-07-21 15:46:10,491 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 29 [2020-07-21 15:46:10,918 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 26 [2020-07-21 15:46:12,798 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 47 [2020-07-21 15:46:13,178 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 50 [2020-07-21 15:46:13,540 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 44 [2020-07-21 15:46:13,904 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 46 [2020-07-21 15:46:14,235 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 41 [2020-07-21 15:46:14,552 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 43 [2020-07-21 15:46:14,855 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2020-07-21 15:46:15,231 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 44 [2020-07-21 15:46:15,531 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 40 [2020-07-21 15:46:15,923 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 47 [2020-07-21 15:46:16,250 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-07-21 15:46:16,542 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 37 [2020-07-21 15:46:16,954 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 41 [2020-07-21 15:46:17,390 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 50 [2020-07-21 15:46:17,729 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 32 [2020-07-21 15:46:18,038 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 34 [2020-07-21 15:46:18,419 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 38 [2020-07-21 15:46:18,770 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 30 [2020-07-21 15:46:19,030 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 31 [2020-07-21 15:46:19,440 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 35 [2020-07-21 15:46:19,979 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-21 15:46:20,352 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2020-07-21 15:46:20,650 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2020-07-21 15:46:21,014 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2020-07-21 15:46:21,307 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 44 [2020-07-21 15:46:21,597 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2020-07-21 15:46:21,988 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 47 [2020-07-21 15:46:22,392 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 50 [2020-07-21 15:46:22,794 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 15:46:23,087 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 29 [2020-07-21 15:46:24,990 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-07-21 15:46:25,700 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-07-21 15:46:26,536 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-07-21 15:46:27,789 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2020-07-21 15:46:28,010 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 7 [2020-07-21 15:46:28,728 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2020-07-21 15:46:30,216 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-07-21 15:46:30,785 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 38 [2020-07-21 15:46:31,112 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 44 [2020-07-21 15:46:31,653 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2020-07-21 15:46:32,159 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2020-07-21 15:46:32,873 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-21 15:46:34,419 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2020-07-21 15:46:34,726 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 29 [2020-07-21 15:46:35,214 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2020-07-21 15:46:35,577 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 41 [2020-07-21 15:46:36,044 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-07-21 15:46:40,133 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 9 [2020-07-21 15:46:40,350 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 9 [2020-07-21 15:46:44,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:44,418 INFO L93 Difference]: Finished difference Result 653 states and 1389 transitions. [2020-07-21 15:46:44,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-07-21 15:46:44,420 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 188 [2020-07-21 15:46:44,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:44,432 INFO L225 Difference]: With dead ends: 653 [2020-07-21 15:46:44,432 INFO L226 Difference]: Without dead ends: 649 [2020-07-21 15:46:44,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 283 SyntacticMatches, 21 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17540 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=8536, Invalid=49304, Unknown=0, NotChecked=0, Total=57840 [2020-07-21 15:46:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2020-07-21 15:46:44,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 529. [2020-07-21 15:46:44,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2020-07-21 15:46:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 999 transitions. [2020-07-21 15:46:44,516 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 999 transitions. Word has length 188 [2020-07-21 15:46:44,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:44,517 INFO L479 AbstractCegarLoop]: Abstraction has 529 states and 999 transitions. [2020-07-21 15:46:44,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-21 15:46:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 999 transitions. [2020-07-21 15:46:44,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-07-21 15:46:44,525 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:44,526 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] [2020-07-21 15:46:44,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:44,739 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:44,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1322769943, now seen corresponding path program 9 times [2020-07-21 15:46:44,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:44,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496564914] [2020-07-21 15:46:44,741 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:44,927 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:44,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:44,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 15:46:44,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 415 refuted. 0 times theorem prover too weak. 1592 trivial. 0 not checked. [2020-07-21 15:46:45,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:45,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:45,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:45,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:45,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:45,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:45,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:45,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:45,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:47,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:47,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:47,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:47,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:47,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 447 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2020-07-21 15:46:47,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496564914] [2020-07-21 15:46:47,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:47,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 15:46:47,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474547108] [2020-07-21 15:46:47,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 15:46:47,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:47,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 15:46:47,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 15:46:47,750 INFO L87 Difference]: Start difference. First operand 529 states and 999 transitions. Second operand 25 states. [2020-07-21 15:46:48,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:48,209 INFO L93 Difference]: Finished difference Result 657 states and 1574 transitions. [2020-07-21 15:46:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 15:46:48,210 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 194 [2020-07-21 15:46:48,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:48,223 INFO L225 Difference]: With dead ends: 657 [2020-07-21 15:46:48,223 INFO L226 Difference]: Without dead ends: 633 [2020-07-21 15:46:48,224 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 [2020-07-21 15:46:48,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-07-21 15:46:48,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 540. [2020-07-21 15:46:48,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-07-21 15:46:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1102 transitions. [2020-07-21 15:46:48,323 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1102 transitions. Word has length 194 [2020-07-21 15:46:48,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:48,324 INFO L479 AbstractCegarLoop]: Abstraction has 540 states and 1102 transitions. [2020-07-21 15:46:48,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 15:46:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1102 transitions. [2020-07-21 15:46:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-07-21 15:46:48,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:48,333 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 20, 19, 19, 19, 19, 19, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:48,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:48,547 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:48,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:48,548 INFO L82 PathProgramCache]: Analyzing trace with hash -994076597, now seen corresponding path program 10 times [2020-07-21 15:46:48,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:48,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576278908] [2020-07-21 15:46:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:48,725 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:46:48,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:48,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-21 15:46:48,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3336 backedges. 236 proven. 463 refuted. 0 times theorem prover too weak. 2637 trivial. 0 not checked. [2020-07-21 15:46:48,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:49,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:49,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:49,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3336 backedges. 236 proven. 488 refuted. 0 times theorem prover too weak. 2612 trivial. 0 not checked. [2020-07-21 15:46:50,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576278908] [2020-07-21 15:46:50,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:50,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 15:46:50,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465100415] [2020-07-21 15:46:50,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 15:46:50,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:50,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 15:46:50,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-07-21 15:46:50,399 INFO L87 Difference]: Start difference. First operand 540 states and 1102 transitions. Second operand 23 states. [2020-07-21 15:46:51,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:51,921 INFO L93 Difference]: Finished difference Result 1122 states and 2936 transitions. [2020-07-21 15:46:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 15:46:51,922 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 228 [2020-07-21 15:46:51,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:51,938 INFO L225 Difference]: With dead ends: 1122 [2020-07-21 15:46:51,938 INFO L226 Difference]: Without dead ends: 654 [2020-07-21 15:46:51,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=425, Invalid=2025, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 15:46:51,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2020-07-21 15:46:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 572. [2020-07-21 15:46:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2020-07-21 15:46:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1119 transitions. [2020-07-21 15:46:52,021 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1119 transitions. Word has length 228 [2020-07-21 15:46:52,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:52,022 INFO L479 AbstractCegarLoop]: Abstraction has 572 states and 1119 transitions. [2020-07-21 15:46:52,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 15:46:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1119 transitions. [2020-07-21 15:46:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-07-21 15:46:52,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:52,034 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] [2020-07-21 15:46:52,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:52,248 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:52,248 INFO L82 PathProgramCache]: Analyzing trace with hash -604098025, now seen corresponding path program 11 times [2020-07-21 15:46:52,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:52,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016462333] [2020-07-21 15:46:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:52,533 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:52,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:52,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 339 conjunts are in the unsatisfiable core [2020-07-21 15:46:52,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 2940 refuted. 0 times theorem prover too weak. 5854 trivial. 0 not checked. [2020-07-21 15:46:53,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:47:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 8644 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-07-21 15:47:09,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016462333] [2020-07-21 15:47:09,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:47:09,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 108] total 129 [2020-07-21 15:47:09,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266664814] [2020-07-21 15:47:09,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2020-07-21 15:47:09,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:47:09,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2020-07-21 15:47:09,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=16060, Unknown=0, NotChecked=0, Total=16512 [2020-07-21 15:47:09,894 INFO L87 Difference]: Start difference. First operand 572 states and 1119 transitions. Second operand 129 states. [2020-07-21 15:47:10,414 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 6 [2020-07-21 15:47:11,338 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 97 [2020-07-21 15:47:12,071 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 94 [2020-07-21 15:47:12,838 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 95 [2020-07-21 15:47:13,535 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 91 [2020-07-21 15:47:14,262 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 92 [2020-07-21 15:47:14,912 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 88 [2020-07-21 15:47:15,609 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 89 [2020-07-21 15:47:16,229 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 85 [2020-07-21 15:47:16,963 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 86 [2020-07-21 15:47:17,585 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 82 [2020-07-21 15:47:18,244 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 83 [2020-07-21 15:47:18,846 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 79 [2020-07-21 15:47:19,638 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 80 [2020-07-21 15:47:20,261 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 76 [2020-07-21 15:47:21,042 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 77 [2020-07-21 15:47:21,631 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 73 [2020-07-21 15:47:22,414 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 74 [2020-07-21 15:47:23,004 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 70 [2020-07-21 15:47:23,740 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 71 [2020-07-21 15:47:24,264 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 67 [2020-07-21 15:47:24,972 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 68 [2020-07-21 15:47:25,420 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 64 [2020-07-21 15:47:26,056 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 65 [2020-07-21 15:47:26,549 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 61 [2020-07-21 15:47:27,195 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 62 [2020-07-21 15:47:27,674 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 58 [2020-07-21 15:47:28,339 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 59 [2020-07-21 15:47:28,802 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 55 [2020-07-21 15:47:29,435 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 56 [2020-07-21 15:47:29,894 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 52 [2020-07-21 15:47:30,512 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 53 [2020-07-21 15:47:30,931 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 49 [2020-07-21 15:47:31,506 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 50 [2020-07-21 15:47:31,901 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 46 [2020-07-21 15:47:32,435 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 47 [2020-07-21 15:47:32,884 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 43 [2020-07-21 15:47:33,436 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 44 [2020-07-21 15:47:33,812 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-07-21 15:47:34,358 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 41 [2020-07-21 15:47:34,699 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 37 [2020-07-21 15:47:35,171 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 38 [2020-07-21 15:47:35,489 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 34 [2020-07-21 15:47:35,961 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 35 [2020-07-21 15:47:36,282 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 31 [2020-07-21 15:47:36,714 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 32 [2020-07-21 15:47:37,016 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 28 [2020-07-21 15:47:37,444 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 29 [2020-07-21 15:47:37,724 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 25 [2020-07-21 15:47:38,136 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 26 [2020-07-21 15:47:39,098 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 19 [2020-07-21 15:47:42,706 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 89 [2020-07-21 15:47:43,839 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 86 [2020-07-21 15:47:44,938 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 83 [2020-07-21 15:47:46,050 WARN L193 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 80 [2020-07-21 15:47:47,092 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 77 [2020-07-21 15:47:48,119 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 74 [2020-07-21 15:47:49,188 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 71 [2020-07-21 15:47:50,174 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 68 [2020-07-21 15:47:51,110 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 65 [2020-07-21 15:47:52,007 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 62 [2020-07-21 15:47:52,883 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 59 [2020-07-21 15:47:53,785 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 56 [2020-07-21 15:47:54,659 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 53 [2020-07-21 15:47:55,483 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 51 [2020-07-21 15:47:56,261 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 48 [2020-07-21 15:47:57,004 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 45 [2020-07-21 15:47:57,710 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 42 [2020-07-21 15:47:58,482 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 39 [2020-07-21 15:47:59,194 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 36 [2020-07-21 15:47:59,825 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 33 [2020-07-21 15:48:00,434 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 30 [2020-07-21 15:48:01,052 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 27 [2020-07-21 15:48:01,632 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 24 [2020-07-21 15:48:02,179 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2020-07-21 15:48:02,715 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 18 [2020-07-21 15:48:04,917 WARN L193 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 90 [2020-07-21 15:48:06,028 WARN L193 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 92 [2020-07-21 15:48:07,162 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 87 [2020-07-21 15:48:08,178 WARN L193 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 89 [2020-07-21 15:48:09,356 WARN L193 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 84 [2020-07-21 15:48:10,403 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 87 [2020-07-21 15:48:11,433 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 81 [2020-07-21 15:48:12,442 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 84 [2020-07-21 15:48:13,493 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 78 [2020-07-21 15:48:14,533 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 81 [2020-07-21 15:48:15,655 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 75 [2020-07-21 15:48:16,758 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 78 [2020-07-21 15:48:17,852 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 72 [2020-07-21 15:48:18,912 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 75 [2020-07-21 15:48:19,960 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 69 [2020-07-21 15:48:21,058 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 72 [2020-07-21 15:48:22,070 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 66 [2020-07-21 15:48:23,084 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 69 [2020-07-21 15:48:24,111 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 63 [2020-07-21 15:48:25,109 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 66 [2020-07-21 15:48:26,033 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 60 [2020-07-21 15:48:27,066 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 63 [2020-07-21 15:48:28,040 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 57 [2020-07-21 15:48:29,025 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 60 [2020-07-21 15:48:29,947 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 54 [2020-07-21 15:48:30,880 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 57 [2020-07-21 15:48:31,751 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 51 [2020-07-21 15:48:32,653 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 54 [2020-07-21 15:48:33,433 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 48 [2020-07-21 15:48:34,345 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 51 [2020-07-21 15:48:35,216 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 45 [2020-07-21 15:48:36,047 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 48 [2020-07-21 15:48:36,867 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 42 [2020-07-21 15:48:37,643 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 45 [2020-07-21 15:48:38,373 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 39 [2020-07-21 15:48:39,170 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 42 [2020-07-21 15:48:39,889 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 36 [2020-07-21 15:48:40,609 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 39 [2020-07-21 15:48:41,299 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 33 [2020-07-21 15:48:41,993 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 36 [2020-07-21 15:48:42,689 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 30 [2020-07-21 15:48:43,345 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 33 [2020-07-21 15:48:44,008 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 27 [2020-07-21 15:48:44,658 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 30 [2020-07-21 15:48:45,271 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 24 [2020-07-21 15:48:45,895 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 27 [2020-07-21 15:48:46,505 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2020-07-21 15:48:47,137 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 23 [2020-07-21 15:48:47,703 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 18 [2020-07-21 15:48:48,280 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 20 [2020-07-21 15:48:51,962 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2020-07-21 15:48:52,898 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 15 [2020-07-21 15:48:53,431 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2020-07-21 15:48:54,077 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-07-21 15:48:54,583 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2020-07-21 15:48:55,110 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2020-07-21 15:48:55,803 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-07-21 15:48:56,339 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 15:48:58,081 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 251 DAG size of output: 92 [2020-07-21 15:48:59,755 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 261 DAG size of output: 94 [2020-07-21 15:49:01,381 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 244 DAG size of output: 89 [2020-07-21 15:49:03,121 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 253 DAG size of output: 91 [2020-07-21 15:49:04,809 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 238 DAG size of output: 86 [2020-07-21 15:49:06,336 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 246 DAG size of output: 88 [2020-07-21 15:49:07,972 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 231 DAG size of output: 83 [2020-07-21 15:49:09,560 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 240 DAG size of output: 85 [2020-07-21 15:49:11,042 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 223 DAG size of output: 80 [2020-07-21 15:49:12,620 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 233 DAG size of output: 82 [2020-07-21 15:49:14,093 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 218 DAG size of output: 78 [2020-07-21 15:49:15,618 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 225 DAG size of output: 79 [2020-07-21 15:49:17,054 WARN L193 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 75 [2020-07-21 15:49:18,210 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 76 [2020-07-21 15:49:19,310 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 72 [2020-07-21 15:49:20,471 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 74 [2020-07-21 15:49:21,483 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 69 [2020-07-21 15:49:22,795 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 205 DAG size of output: 71 [2020-07-21 15:49:24,180 WARN L193 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 66 [2020-07-21 15:49:25,562 WARN L193 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 68 [2020-07-21 15:49:26,943 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 63 [2020-07-21 15:49:28,230 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 65 [2020-07-21 15:49:29,190 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 60 [2020-07-21 15:49:30,161 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 62 [2020-07-21 15:49:31,183 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 57 [2020-07-21 15:49:32,164 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 59 [2020-07-21 15:49:33,018 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 54 [2020-07-21 15:49:33,971 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 56 [2020-07-21 15:49:34,932 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 51 [2020-07-21 15:49:36,166 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 53 [2020-07-21 15:49:37,259 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 48 [2020-07-21 15:49:38,443 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 50 [2020-07-21 15:49:39,449 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 45 [2020-07-21 15:49:40,604 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 47 [2020-07-21 15:49:41,619 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 42 [2020-07-21 15:49:42,597 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 44 [2020-07-21 15:49:43,696 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 39 [2020-07-21 15:49:44,728 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 41 [2020-07-21 15:49:45,744 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 36 [2020-07-21 15:49:46,755 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 38 [2020-07-21 15:49:47,753 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 33 [2020-07-21 15:49:48,765 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 35 [2020-07-21 15:49:49,678 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 30 [2020-07-21 15:49:50,622 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 32 [2020-07-21 15:49:51,361 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 15:49:52,152 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-07-21 15:49:54,542 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 15:49:55,157 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-07-21 15:49:55,669 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2020-07-21 15:49:56,245 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2020-07-21 15:49:56,989 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-07-21 15:49:58,244 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 33 [2020-07-21 15:49:58,775 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 15 [2020-07-21 15:49:59,523 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2020-07-21 15:50:00,682 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2020-07-21 15:50:02,041 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 50 [2020-07-21 15:50:02,785 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-07-21 15:50:04,077 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2020-07-21 15:50:05,382 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 29 [2020-07-21 15:50:06,154 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 15:50:07,302 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2020-07-21 15:50:08,639 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 47 [2020-07-21 15:50:09,366 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2020-07-21 15:50:10,576 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2020-07-21 15:50:11,458 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2020-07-21 15:50:13,281 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 44 [2020-07-21 15:50:13,988 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-07-21 15:50:15,329 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2020-07-21 15:50:16,146 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 33 [2020-07-21 15:50:18,034 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 53 [2020-07-21 15:50:18,925 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2020-07-21 15:50:20,603 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 56 [2020-07-21 15:50:21,877 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2020-07-21 15:50:23,931 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 59 [2020-07-21 15:50:27,016 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 170 DAG size of output: 74 [2020-07-21 15:50:28,620 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 62 [2020-07-21 15:50:31,597 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 71 [2020-07-21 15:50:33,298 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 65 [2020-07-21 15:50:35,290 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 68 [2020-07-21 15:50:38,109 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 77 [2020-07-21 15:50:39,841 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 183 DAG size of output: 80 [2020-07-21 15:50:42,171 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 83 [2020-07-21 15:50:44,221 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 198 DAG size of output: 86 [2020-07-21 15:50:46,355 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 222 DAG size of output: 95 [2020-07-21 15:50:47,960 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 205 DAG size of output: 89 [2020-07-21 15:50:50,133 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 213 DAG size of output: 92 [2020-07-21 15:50:54,453 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 231 DAG size of output: 98 [2020-07-21 15:50:57,428 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 261 DAG size of output: 94 [2020-07-21 15:51:00,134 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 270 DAG size of output: 97 [2020-07-21 15:51:02,728 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 253 DAG size of output: 91 [2020-07-21 15:51:05,372 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 262 DAG size of output: 94 [2020-07-21 15:51:07,773 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 246 DAG size of output: 88 [2020-07-21 15:51:10,429 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 254 DAG size of output: 91 [2020-07-21 15:51:12,892 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 240 DAG size of output: 85 [2020-07-21 15:51:15,379 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 247 DAG size of output: 88 [2020-07-21 15:51:17,777 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 233 DAG size of output: 82 [2020-07-21 15:51:20,198 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 245 DAG size of output: 89 [2020-07-21 15:51:22,575 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 241 DAG size of output: 85 [2020-07-21 15:51:25,429 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 252 DAG size of output: 92 [2020-07-21 15:51:27,929 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 225 DAG size of output: 79 [2020-07-21 15:51:30,309 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 234 DAG size of output: 82 [2020-07-21 15:51:32,694 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 239 DAG size of output: 86 [2020-07-21 15:51:35,393 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 260 DAG size of output: 95 [2020-07-21 15:51:37,720 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 220 DAG size of output: 76 [2020-07-21 15:51:40,274 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 226 DAG size of output: 79 [2020-07-21 15:51:43,341 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 232 DAG size of output: 83 [2020-07-21 15:51:46,126 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 214 DAG size of output: 73 [2020-07-21 15:51:48,611 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 224 DAG size of output: 80 [2020-07-21 15:51:50,924 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 221 DAG size of output: 76 [2020-07-21 15:51:53,535 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 205 DAG size of output: 70 [2020-07-21 15:51:55,773 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 219 DAG size of output: 77 [2020-07-21 15:51:57,830 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 215 DAG size of output: 73 [2020-07-21 15:52:00,680 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 268 DAG size of output: 98 [2020-07-21 15:52:02,845 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 197 DAG size of output: 67 [2020-07-21 15:52:05,033 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 206 DAG size of output: 70 [2020-07-21 15:52:07,643 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 213 DAG size of output: 74 [2020-07-21 15:52:09,943 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 190 DAG size of output: 64 [2020-07-21 15:52:11,927 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 198 DAG size of output: 67 [2020-07-21 15:52:14,383 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 204 DAG size of output: 71 [2020-07-21 15:52:17,207 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 183 DAG size of output: 61 [2020-07-21 15:52:19,529 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 191 DAG size of output: 64 [2020-07-21 15:52:22,274 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 196 DAG size of output: 68 [2020-07-21 15:52:24,624 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 175 DAG size of output: 58 [2020-07-21 15:52:26,685 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 184 DAG size of output: 61 [2020-07-21 15:52:29,145 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 189 DAG size of output: 65 [2020-07-21 15:52:31,522 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 169 DAG size of output: 55 [2020-07-21 15:52:33,543 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 176 DAG size of output: 58 [2020-07-21 15:52:36,022 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 182 DAG size of output: 62 [2020-07-21 15:52:38,487 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 163 DAG size of output: 53 [2020-07-21 15:52:40,117 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 170 DAG size of output: 55 [2020-07-21 15:52:42,289 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 174 DAG size of output: 59 [2020-07-21 15:52:44,193 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 51 [2020-07-21 15:52:45,460 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 53 [2020-07-21 15:52:47,424 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 48 [2020-07-21 15:52:48,869 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 51 [2020-07-21 15:52:50,860 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 45 [2020-07-21 15:52:51,940 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 48 [2020-07-21 15:52:53,469 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2020-07-21 15:52:54,467 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 45 [2020-07-21 15:52:56,451 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2020-07-21 15:52:57,574 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2020-07-21 15:53:01,557 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 233 DAG size of output: 98 [2020-07-21 15:53:02,716 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 7 [2020-07-21 15:53:03,553 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 6 [2020-07-21 15:53:04,335 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 15:53:08,733 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 224 DAG size of output: 95 [2020-07-21 15:53:11,481 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 215 DAG size of output: 92 [2020-07-21 15:53:14,302 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 207 DAG size of output: 89 [2020-07-21 15:53:17,080 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 200 DAG size of output: 86 [2020-07-21 15:53:19,730 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 193 DAG size of output: 83 [2020-07-21 15:53:22,277 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 185 DAG size of output: 80 [2020-07-21 15:53:25,105 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 179 DAG size of output: 77 [2020-07-21 15:53:28,077 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 172 DAG size of output: 74 [2020-07-21 15:53:30,978 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 163 DAG size of output: 71 [2020-07-21 15:53:33,743 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 155 DAG size of output: 68 [2020-07-21 15:53:36,679 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 148 DAG size of output: 65 [2020-07-21 15:53:38,021 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 15 [2020-07-21 15:53:39,765 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2020-07-21 15:53:40,630 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2020-07-21 15:53:43,406 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 141 DAG size of output: 62 [2020-07-21 15:53:45,115 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2020-07-21 15:53:49,627 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2020-07-21 15:53:51,422 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2020-07-21 15:53:53,622 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 127 DAG size of output: 56 [2020-07-21 15:53:55,733 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2020-07-21 15:53:57,520 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2020-07-21 15:53:59,836 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 128 DAG size of output: 53 [2020-07-21 15:54:01,920 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2020-07-21 15:54:03,836 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 38 [2020-07-21 15:54:05,948 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 136 DAG size of output: 56 [2020-07-21 15:54:07,478 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 17 [2020-07-21 15:54:11,216 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 174 DAG size of output: 71 [2020-07-21 15:54:13,772 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 143 DAG size of output: 59 [2020-07-21 15:54:16,166 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 122 DAG size of output: 50 [2020-07-21 15:54:18,799 WARN L193 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 47 [2020-07-21 15:54:21,502 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 167 DAG size of output: 68 [2020-07-21 15:54:23,616 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 41 [2020-07-21 15:54:25,923 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 150 DAG size of output: 62 [2020-07-21 15:54:28,438 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2020-07-21 15:54:29,575 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-21 15:54:32,375 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 158 DAG size of output: 65 [2020-07-21 15:54:33,713 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2020-07-21 15:54:36,285 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 180 DAG size of output: 74 [2020-07-21 15:54:38,956 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 188 DAG size of output: 77 [2020-07-21 15:54:39,903 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2020-07-21 15:54:42,658 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 195 DAG size of output: 80 [2020-07-21 15:54:43,715 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2020-07-21 15:54:46,845 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 202 DAG size of output: 83 [2020-07-21 15:54:48,100 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-07-21 15:54:50,967 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 228 DAG size of output: 92 [2020-07-21 15:54:52,288 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-07-21 15:54:55,131 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 210 DAG size of output: 86 [2020-07-21 15:54:58,176 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 219 DAG size of output: 89 [2020-07-21 15:54:59,705 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-07-21 15:55:01,482 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 29 [2020-07-21 15:55:03,663 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 120 DAG size of output: 53 [2020-07-21 15:55:05,364 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2020-07-21 15:55:07,271 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 111 DAG size of output: 50 [2020-07-21 15:55:09,060 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 23 [2020-07-21 15:55:10,969 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2020-07-21 15:55:12,619 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 20 [2020-07-21 15:55:14,050 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 17 [2020-07-21 15:55:16,012 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2020-07-21 15:55:17,783 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-07-21 15:55:20,077 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 133 DAG size of output: 59 [2020-07-21 15:55:20,904 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 15 [2020-07-21 15:56:07,514 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 15:56:08,673 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 15:56:09,926 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 15:56:11,054 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 15:56:12,305 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 15:56:13,544 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 15:56:14,954 WARN L193 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 15:56:16,241 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 8 [2020-07-21 15:56:18,316 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 228 DAG size of output: 9 [2020-07-21 15:56:20,333 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 228 DAG size of output: 9 [2020-07-21 15:56:31,050 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 14 [2020-07-21 15:56:32,432 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 11 [2020-07-21 15:56:33,721 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 8 [2020-07-21 15:56:40,271 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2020-07-21 15:56:42,259 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2020-07-21 15:56:43,079 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2020-07-21 15:57:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:14,250 INFO L93 Difference]: Finished difference Result 1859 states and 4621 transitions. [2020-07-21 15:57:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 408 states. [2020-07-21 15:57:14,260 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 354 [2020-07-21 15:57:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:14,325 INFO L225 Difference]: With dead ends: 1859 [2020-07-21 15:57:14,325 INFO L226 Difference]: Without dead ends: 1855 [2020-07-21 15:57:14,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1103 GetRequests, 528 SyntacticMatches, 54 SemanticMatches, 521 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91460 ImplicationChecksByTransitivity, 420.7s TimeCoverageRelationStatistics Valid=39641, Invalid=233365, Unknown=0, NotChecked=0, Total=273006 [2020-07-21 15:57:14,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2020-07-21 15:57:14,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1560. [2020-07-21 15:57:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1560 states. [2020-07-21 15:57:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 3301 transitions. [2020-07-21 15:57:14,776 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 3301 transitions. Word has length 354 [2020-07-21 15:57:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:14,779 INFO L479 AbstractCegarLoop]: Abstraction has 1560 states and 3301 transitions. [2020-07-21 15:57:14,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 129 states. [2020-07-21 15:57:14,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 3301 transitions. [2020-07-21 15:57:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-07-21 15:57:14,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:14,822 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] [2020-07-21 15:57:15,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:15,036 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:15,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:15,037 INFO L82 PathProgramCache]: Analyzing trace with hash 800684683, now seen corresponding path program 12 times [2020-07-21 15:57:15,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:15,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826728306] [2020-07-21 15:57:15,038 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:15,449 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:57:15,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:15,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 15:57:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1112 refuted. 0 times theorem prover too weak. 7456 trivial. 0 not checked. [2020-07-21 15:57:16,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:17,428 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 15:57:17,532 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 15:57:17,748 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 15:57:17,973 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 15:57:18,093 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 15:57:19,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:19,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:20,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:20,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:21,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:22,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:22,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:25,191 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 15:57:29,841 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 15:57:30,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:30,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:32,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:32,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:33,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:33,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:33,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:33,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:34,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1162 refuted. 0 times theorem prover too weak. 7406 trivial. 0 not checked. [2020-07-21 15:57:34,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826728306] [2020-07-21 15:57:34,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:34,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-21 15:57:34,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182838972] [2020-07-21 15:57:34,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 15:57:34,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:34,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 15:57:34,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-21 15:57:34,360 INFO L87 Difference]: Start difference. First operand 1560 states and 3301 transitions. Second operand 29 states. [2020-07-21 15:57:36,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:36,545 INFO L93 Difference]: Finished difference Result 1838 states and 4911 transitions. [2020-07-21 15:57:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 15:57:36,552 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 360 [2020-07-21 15:57:36,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:36,585 INFO L225 Difference]: With dead ends: 1838 [2020-07-21 15:57:36,585 INFO L226 Difference]: Without dead ends: 1811 [2020-07-21 15:57:36,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 667 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=319, Invalid=1321, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 15:57:36,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2020-07-21 15:57:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1600. [2020-07-21 15:57:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1600 states. [2020-07-21 15:57:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3611 transitions. [2020-07-21 15:57:37,010 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3611 transitions. Word has length 360 [2020-07-21 15:57:37,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:37,011 INFO L479 AbstractCegarLoop]: Abstraction has 1600 states and 3611 transitions. [2020-07-21 15:57:37,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 15:57:37,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3611 transitions. [2020-07-21 15:57:37,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-07-21 15:57:37,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:37,043 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] [2020-07-21 15:57:37,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:37,259 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:37,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:37,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1691088873, now seen corresponding path program 13 times [2020-07-21 15:57:37,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:37,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815564485] [2020-07-21 15:57:37,261 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:37,636 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:57:37,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:37,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1761 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 15:57:37,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13858 backedges. 1200 proven. 585 refuted. 0 times theorem prover too weak. 12073 trivial. 0 not checked. [2020-07-21 15:57:38,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:39,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:40,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:40,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:40,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13858 backedges. 1200 proven. 627 refuted. 0 times theorem prover too weak. 12031 trivial. 0 not checked. [2020-07-21 15:57:54,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815564485] [2020-07-21 15:57:54,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:54,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 27 [2020-07-21 15:57:54,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864716957] [2020-07-21 15:57:54,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 15:57:54,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:54,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 15:57:54,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2020-07-21 15:57:54,491 INFO L87 Difference]: Start difference. First operand 1600 states and 3611 transitions. Second operand 27 states. [2020-07-21 15:58:01,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:58:01,341 INFO L93 Difference]: Finished difference Result 3417 states and 9865 transitions. [2020-07-21 15:58:01,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-21 15:58:01,348 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 434 [2020-07-21 15:58:01,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:58:01,377 INFO L225 Difference]: With dead ends: 3417 [2020-07-21 15:58:01,377 INFO L226 Difference]: Without dead ends: 1963 [2020-07-21 15:58:01,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 842 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=718, Invalid=3572, Unknown=0, NotChecked=0, Total=4290 [2020-07-21 15:58:01,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2020-07-21 15:58:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1745. [2020-07-21 15:58:01,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1745 states. [2020-07-21 15:58:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 3682 transitions. [2020-07-21 15:58:01,669 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 3682 transitions. Word has length 434 [2020-07-21 15:58:01,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:58:01,669 INFO L479 AbstractCegarLoop]: Abstraction has 1745 states and 3682 transitions. [2020-07-21 15:58:01,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 15:58:01,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 3682 transitions. [2020-07-21 15:58:01,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2020-07-21 15:58:01,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:58:01,711 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] [2020-07-21 15:58:01,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:58:01,925 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:58:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:58:01,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2092966539, now seen corresponding path program 14 times [2020-07-21 15:58:01,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:58:01,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991825877] [2020-07-21 15:58:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:58:02,599 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:58:02,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:58:02,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 3224 conjuncts, 663 conjunts are in the unsatisfiable core [2020-07-21 15:58:02,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:58:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 35990 backedges. 0 proven. 12010 refuted. 0 times theorem prover too weak. 23980 trivial. 0 not checked. [2020-07-21 15:58:07,618 INFO L328 TraceCheckSpWp]: Computing backward predicates...