/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:31:41,191 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 00:31:41,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 00:31:41,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 00:31:41,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 00:31:41,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 00:31:41,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 00:31:41,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 00:31:41,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 00:31:41,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 00:31:41,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:31:41,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:31:41,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:31:41,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:31:41,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:31:41,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:31:41,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:31:41,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:31:41,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:31:41,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:31:41,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:31:41,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:31:41,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:31:41,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 00:31:41,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 00:31:41,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 00:31:41,276 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 00:31:41,314 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:31:41,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:31:41,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:31:41,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:31:41,317 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:31:41,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:31:41,318 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:31:41,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:31:41,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:31:41,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:31:41,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:31:41,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:31:41,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:31:41,320 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:31:41,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:31:41,320 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:31:41,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:31:41,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:31:41,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:31:41,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:31:41,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:31:41,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:31:41,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:31:41,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:31:41,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:31:41,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:31:41,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:41,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:31:41,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:31:41,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 00:31:41,591 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:31:41,604 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:31:41,607 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:31:41,609 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:31:41,609 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:31:41,610 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-21 00:31:41,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9be4c24ff/73a934daedfb4200b47964c8a607fa03/FLAG1a95e01d5 [2020-07-21 00:31:42,125 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:31:42,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-21 00:31:42,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9be4c24ff/73a934daedfb4200b47964c8a607fa03/FLAG1a95e01d5 [2020-07-21 00:31:42,531 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9be4c24ff/73a934daedfb4200b47964c8a607fa03 [2020-07-21 00:31:42,539 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:31:42,543 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:31:42,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:42,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:31:42,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:31:42,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:42" (1/1) ... [2020-07-21 00:31:42,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab40a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42, skipping insertion in model container [2020-07-21 00:31:42,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:42" (1/1) ... [2020-07-21 00:31:42,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:31:42,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:31:42,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:42,724 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:31:42,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:42,755 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:31:42,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42 WrapperNode [2020-07-21 00:31:42,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:42,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:31:42,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:31:42,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:31:42,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (1/1) ... [2020-07-21 00:31:42,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (1/1) ... [2020-07-21 00:31:42,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (1/1) ... [2020-07-21 00:31:42,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (1/1) ... [2020-07-21 00:31:42,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (1/1) ... [2020-07-21 00:31:42,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (1/1) ... [2020-07-21 00:31:42,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (1/1) ... [2020-07-21 00:31:42,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:31:42,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:31:42,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:31:42,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:31:42,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (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 00:31:42,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:31:42,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:31:42,926 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-21 00:31:42,926 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:31:42,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:31:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:31:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-21 00:31:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:31:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:31:42,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:31:43,098 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:31:43,099 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:31:43,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:43 BoogieIcfgContainer [2020-07-21 00:31:43,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:31:43,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:31:43,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:31:43,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:31:43,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:31:42" (1/3) ... [2020-07-21 00:31:43,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d007e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:43, skipping insertion in model container [2020-07-21 00:31:43,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (2/3) ... [2020-07-21 00:31:43,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d007e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:43, skipping insertion in model container [2020-07-21 00:31:43,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:43" (3/3) ... [2020-07-21 00:31:43,112 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci02.c [2020-07-21 00:31:43,123 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:31:43,131 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:31:43,151 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:31:43,188 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:31:43,188 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:31:43,189 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:31:43,189 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:31:43,189 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:31:43,189 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:31:43,189 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:31:43,190 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:31:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-21 00:31:43,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 00:31:43,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:43,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:43,221 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:43,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2020-07-21 00:31:43,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:43,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520703645] [2020-07-21 00:31:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:43,306 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:43,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:43,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:31:43,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:43,408 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 00:31:43,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:43,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520703645] [2020-07-21 00:31:43,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:43,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:31:43,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989951797] [2020-07-21 00:31:43,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:31:43,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:43,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:31:43,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:31:43,431 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-21 00:31:43,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:43,551 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-07-21 00:31:43,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:31:43,554 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 00:31:43,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:43,564 INFO L225 Difference]: With dead ends: 33 [2020-07-21 00:31:43,565 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 00:31:43,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:31:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 00:31:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 00:31:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 00:31:43,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 00:31:43,637 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 00:31:43,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:43,637 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 00:31:43,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:31:43,638 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 00:31:43,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 00:31:43,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:43,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:43,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:43,857 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:43,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:43,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2020-07-21 00:31:43,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:43,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904239934] [2020-07-21 00:31:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:43,884 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:43,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:43,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:31:43,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:43,916 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 00:31:43,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:43,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904239934] [2020-07-21 00:31:43,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:43,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:31:43,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834389601] [2020-07-21 00:31:43,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:31:43,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:43,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:31:43,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:31:43,921 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 00:31:43,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:43,974 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 00:31:43,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:31:43,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 00:31:43,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:43,977 INFO L225 Difference]: With dead ends: 27 [2020-07-21 00:31:43,977 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 00:31:43,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:31:43,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 00:31:43,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 00:31:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 00:31:43,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 00:31:43,987 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 00:31:43,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:43,987 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 00:31:43,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:31:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 00:31:43,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 00:31:43,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:43,990 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] [2020-07-21 00:31:44,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:44,203 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:44,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:44,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2020-07-21 00:31:44,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:44,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689764064] [2020-07-21 00:31:44,206 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:44,233 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:44,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:44,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:31:44,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:31:44,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:44,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:44,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 00:31:44,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689764064] [2020-07-21 00:31:44,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:44,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 00:31:44,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147377321] [2020-07-21 00:31:44,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 00:31:44,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:44,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 00:31:44,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:31:44,561 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 00:31:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:44,673 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 00:31:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:31:44,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 00:31:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:44,678 INFO L225 Difference]: With dead ends: 32 [2020-07-21 00:31:44,678 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 00:31:44,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:31:44,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 00:31:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 00:31:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 00:31:44,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 00:31:44,695 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 00:31:44,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:44,696 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 00:31:44,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 00:31:44,696 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 00:31:44,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 00:31:44,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:44,701 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:44,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:44,916 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:44,917 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2020-07-21 00:31:44,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:44,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222334471] [2020-07-21 00:31:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) [2020-07-21 00:31:44,943 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:44,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:44,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:31:44,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 00:31:44,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:45,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 00:31:45,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222334471] [2020-07-21 00:31:45,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:45,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 00:31:45,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185444357] [2020-07-21 00:31:45,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 00:31:45,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:45,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 00:31:45,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:31:45,153 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 00:31:45,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:45,217 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 00:31:45,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:31:45,217 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 00:31:45,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:45,220 INFO L225 Difference]: With dead ends: 37 [2020-07-21 00:31:45,220 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 00:31:45,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:31:45,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 00:31:45,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 00:31:45,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 00:31:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 00:31:45,229 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 00:31:45,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:45,230 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 00:31:45,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 00:31:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 00:31:45,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 00:31:45,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:45,232 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:45,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:45,446 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:45,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:45,446 INFO L82 PathProgramCache]: Analyzing trace with hash 246499846, now seen corresponding path program 2 times [2020-07-21 00:31:45,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:45,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595112629] [2020-07-21 00:31:45,447 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:45,475 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:45,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:45,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:31:45,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:31:45,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:45,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:45,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 00:31:45,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595112629] [2020-07-21 00:31:45,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:45,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 00:31:45,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357598279] [2020-07-21 00:31:45,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:31:45,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:45,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:31:45,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:31:45,844 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 00:31:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:46,001 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 00:31:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:31:46,001 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 00:31:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:46,003 INFO L225 Difference]: With dead ends: 42 [2020-07-21 00:31:46,003 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 00:31:46,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:31:46,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 00:31:46,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 00:31:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 00:31:46,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 00:31:46,015 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 00:31:46,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:46,016 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 00:31:46,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:31:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 00:31:46,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 00:31:46,018 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:46,018 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:46,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:46,232 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash 380905728, now seen corresponding path program 2 times [2020-07-21 00:31:46,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:46,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839847709] [2020-07-21 00:31:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:46,266 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:46,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:46,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:31:46,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 00:31:46,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:46,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:46,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 00:31:46,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839847709] [2020-07-21 00:31:46,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:46,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 00:31:46,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852867807] [2020-07-21 00:31:46,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:31:46,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:46,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:31:46,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:31:46,608 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 00:31:46,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:46,762 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 00:31:46,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:31:46,763 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 00:31:46,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:46,765 INFO L225 Difference]: With dead ends: 47 [2020-07-21 00:31:46,765 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 00:31:46,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:31:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 00:31:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 00:31:46,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 00:31:46,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 00:31:46,776 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 00:31:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:46,777 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 00:31:46,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:31:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 00:31:46,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 00:31:46,779 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:46,780 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:46,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:46,983 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:46,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:46,984 INFO L82 PathProgramCache]: Analyzing trace with hash 2029845474, now seen corresponding path program 3 times [2020-07-21 00:31:46,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:46,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630696151] [2020-07-21 00:31:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:47,019 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:47,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:47,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:31:47,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 00:31:47,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:47,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:47,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:47,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:47,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:47,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 00:31:47,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630696151] [2020-07-21 00:31:47,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:47,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 00:31:47,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469531135] [2020-07-21 00:31:47,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:31:47,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:47,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:31:47,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:31:47,678 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 00:31:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:47,853 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 00:31:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:31:47,853 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 00:31:47,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:47,856 INFO L225 Difference]: With dead ends: 52 [2020-07-21 00:31:47,856 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 00:31:47,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:31:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 00:31:47,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 00:31:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 00:31:47,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 00:31:47,884 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 00:31:47,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:47,885 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 00:31:47,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:31:47,885 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 00:31:47,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 00:31:47,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:47,891 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:48,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:48,092 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:48,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:48,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1541039141, now seen corresponding path program 3 times [2020-07-21 00:31:48,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:48,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214635847] [2020-07-21 00:31:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:48,140 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:31:48,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:48,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:31:48,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-07-21 00:31:48,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:48,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:48,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:48,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:48,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 142 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-21 00:31:48,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214635847] [2020-07-21 00:31:48,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:48,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 00:31:48,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484912488] [2020-07-21 00:31:48,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:31:48,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:48,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:31:48,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:31:48,804 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-21 00:31:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:48,995 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 00:31:48,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:31:48,997 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-21 00:31:48,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:48,999 INFO L225 Difference]: With dead ends: 57 [2020-07-21 00:31:48,999 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 00:31:49,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 144 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:31:49,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 00:31:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 00:31:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 00:31:49,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 00:31:49,012 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 82 [2020-07-21 00:31:49,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:49,013 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 00:31:49,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:31:49,022 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 00:31:49,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 00:31:49,025 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:49,025 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:49,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:49,239 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:49,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:49,240 INFO L82 PathProgramCache]: Analyzing trace with hash 332479940, now seen corresponding path program 4 times [2020-07-21 00:31:49,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:49,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083830194] [2020-07-21 00:31:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:49,294 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:31:49,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:49,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:31:49,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 507 refuted. 0 times theorem prover too weak. 1481 trivial. 0 not checked. [2020-07-21 00:31:49,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:50,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:50,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:50,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:50,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 529 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2020-07-21 00:31:50,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083830194] [2020-07-21 00:31:50,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:50,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 00:31:50,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759678821] [2020-07-21 00:31:50,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:31:50,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:50,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:31:50,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:31:50,572 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-21 00:31:50,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:50,744 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 00:31:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:31:50,744 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 195 [2020-07-21 00:31:50,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:50,747 INFO L225 Difference]: With dead ends: 62 [2020-07-21 00:31:50,747 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 00:31:50,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 367 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:31:50,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 00:31:50,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 00:31:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 00:31:50,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 00:31:50,773 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 195 [2020-07-21 00:31:50,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:50,774 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 00:31:50,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:31:50,774 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 00:31:50,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 00:31:50,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:50,778 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:50,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:50,979 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:50,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:50,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2116311810, now seen corresponding path program 4 times [2020-07-21 00:31:50,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:50,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842370240] [2020-07-21 00:31:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:51,030 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:31:51,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:51,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:31:51,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 268 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-07-21 00:31:51,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:51,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:51,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:51,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:51,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:51,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:51,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:51,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:51,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 294 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 00:31:52,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842370240] [2020-07-21 00:31:52,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:52,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 00:31:52,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124728163] [2020-07-21 00:31:52,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:31:52,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:52,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:31:52,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:31:52,036 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-21 00:31:52,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:52,231 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-21 00:31:52,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:31:52,231 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 122 [2020-07-21 00:31:52,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:52,234 INFO L225 Difference]: With dead ends: 67 [2020-07-21 00:31:52,234 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 00:31:52,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 220 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:31:52,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 00:31:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-21 00:31:52,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 00:31:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 00:31:52,248 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 122 [2020-07-21 00:31:52,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:52,248 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 00:31:52,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:31:52,249 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 00:31:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 00:31:52,257 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:52,257 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:52,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:52,472 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:52,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1067745099, now seen corresponding path program 5 times [2020-07-21 00:31:52,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:52,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181733310] [2020-07-21 00:31:52,474 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:52,554 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:31:52,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:52,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:31:52,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-21 00:31:52,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:53,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:53,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:54,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:54,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:54,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:54,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:54,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:54,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:54,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-21 00:31:54,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181733310] [2020-07-21 00:31:54,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:54,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 00:31:54,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734196324] [2020-07-21 00:31:54,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:31:54,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:54,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:31:54,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:31:54,582 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-21 00:31:54,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:54,844 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-21 00:31:54,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:31:54,845 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-21 00:31:54,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:54,848 INFO L225 Difference]: With dead ends: 72 [2020-07-21 00:31:54,849 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 00:31:54,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:31:54,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 00:31:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-21 00:31:54,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 00:31:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 00:31:54,864 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-21 00:31:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:54,864 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 00:31:54,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:31:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 00:31:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-21 00:31:54,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:54,869 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:55,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:55,084 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash -738141547, now seen corresponding path program 5 times [2020-07-21 00:31:55,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:55,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777282222] [2020-07-21 00:31:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:55,177 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:31:55,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:55,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:31:55,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-21 00:31:55,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:56,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:56,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:56,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:57,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:57,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:57,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:57,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:57,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-21 00:31:57,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777282222] [2020-07-21 00:31:57,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:57,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 00:31:57,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98410662] [2020-07-21 00:31:57,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:31:57,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:57,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:31:57,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:31:57,263 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-21 00:31:57,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:57,515 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-21 00:31:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:31:57,515 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 299 [2020-07-21 00:31:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:57,523 INFO L225 Difference]: With dead ends: 77 [2020-07-21 00:31:57,523 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 00:31:57,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 570 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:31:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 00:31:57,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-21 00:31:57,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 00:31:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 00:31:57,548 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-21 00:31:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:57,549 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 00:31:57,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:31:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 00:31:57,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 00:31:57,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:57,557 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:57,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:57,772 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:57,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:57,772 INFO L82 PathProgramCache]: Analyzing trace with hash 956910434, now seen corresponding path program 6 times [2020-07-21 00:31:57,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:57,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836512576] [2020-07-21 00:31:57,773 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:57,888 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:31:57,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:31:57,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 268 proven. 1385 refuted. 0 times theorem prover too weak. 5484 trivial. 0 not checked. [2020-07-21 00:31:58,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:59,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:00,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:00,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:00,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:00,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:00,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:00,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:00,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 268 proven. 1436 refuted. 0 times theorem prover too weak. 5433 trivial. 0 not checked. [2020-07-21 00:32:00,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836512576] [2020-07-21 00:32:00,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:00,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 00:32:00,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408409489] [2020-07-21 00:32:00,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:32:00,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:00,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:32:00,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:32:00,834 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-21 00:32:01,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:01,169 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-21 00:32:01,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:32:01,170 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 351 [2020-07-21 00:32:01,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:01,174 INFO L225 Difference]: With dead ends: 82 [2020-07-21 00:32:01,174 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 00:32:01,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 671 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:32:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 00:32:01,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-21 00:32:01,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 00:32:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 00:32:01,199 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 351 [2020-07-21 00:32:01,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:01,200 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 00:32:01,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:32:01,200 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 00:32:01,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2020-07-21 00:32:01,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:01,206 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 77, 44, 44, 44, 44, 44, 44, 44, 33, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:01,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:01,420 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:01,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:01,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2029957590, now seen corresponding path program 6 times [2020-07-21 00:32:01,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:01,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511871990] [2020-07-21 00:32:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:01,569 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:32:01,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:01,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:32:01,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 22374 backedges. 491 proven. 2720 refuted. 0 times theorem prover too weak. 19163 trivial. 0 not checked. [2020-07-21 00:32:01,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:03,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:03,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:04,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:05,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:05,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:05,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:05,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:05,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 22374 backedges. 491 proven. 2777 refuted. 0 times theorem prover too weak. 19106 trivial. 0 not checked. [2020-07-21 00:32:05,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511871990] [2020-07-21 00:32:05,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:05,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 00:32:05,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010165170] [2020-07-21 00:32:05,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:32:05,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:05,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:32:05,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:32:05,654 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-21 00:32:05,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:05,906 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-21 00:32:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:32:05,906 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 618 [2020-07-21 00:32:05,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:05,910 INFO L225 Difference]: With dead ends: 87 [2020-07-21 00:32:05,910 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 00:32:05,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1242 GetRequests, 1204 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:32:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 00:32:05,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-21 00:32:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 00:32:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 00:32:05,933 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 618 [2020-07-21 00:32:05,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:05,935 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 00:32:05,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:32:05,935 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 00:32:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-21 00:32:05,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:05,944 INFO L422 BasicCegarLoop]: trace histogram [133, 133, 67, 66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:06,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:06,158 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:06,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:06,159 INFO L82 PathProgramCache]: Analyzing trace with hash 341063264, now seen corresponding path program 7 times [2020-07-21 00:32:06,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:06,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906363999] [2020-07-21 00:32:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:06,408 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:32:06,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:06,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:32:06,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 687 proven. 4497 refuted. 0 times theorem prover too weak. 40653 trivial. 0 not checked. [2020-07-21 00:32:06,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:09,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:11,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:11,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:11,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:11,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:12,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:12,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:12,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 687 proven. 4567 refuted. 0 times theorem prover too weak. 40583 trivial. 0 not checked. [2020-07-21 00:32:12,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906363999] [2020-07-21 00:32:12,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:12,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 00:32:12,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629816235] [2020-07-21 00:32:12,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:32:12,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:12,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:32:12,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:32:12,628 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-21 00:32:12,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:12,957 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-21 00:32:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:32:12,958 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 871 [2020-07-21 00:32:12,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:12,964 INFO L225 Difference]: With dead ends: 92 [2020-07-21 00:32:12,964 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 00:32:12,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1750 GetRequests, 1707 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:32:12,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 00:32:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-21 00:32:12,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 00:32:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 00:32:12,978 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 871 [2020-07-21 00:32:12,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:12,979 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 00:32:12,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:32:12,979 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 00:32:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 838 [2020-07-21 00:32:12,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:12,987 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 104, 60, 60, 60, 60, 60, 60, 60, 44, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:13,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:13,200 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:13,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:13,200 INFO L82 PathProgramCache]: Analyzing trace with hash 847273596, now seen corresponding path program 7 times [2020-07-21 00:32:13,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:13,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297199193] [2020-07-21 00:32:13,201 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:13,415 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:32:13,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:13,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:32:13,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 41476 backedges. 671 proven. 4412 refuted. 0 times theorem prover too weak. 36393 trivial. 0 not checked. [2020-07-21 00:32:13,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:16,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:16,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:17,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:17,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:18,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:18,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:18,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:18,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:19,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:19,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:19,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:19,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 41476 backedges. 671 proven. 4489 refuted. 0 times theorem prover too weak. 36316 trivial. 0 not checked. [2020-07-21 00:32:19,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297199193] [2020-07-21 00:32:19,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:19,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 00:32:19,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780024182] [2020-07-21 00:32:19,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:32:19,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:19,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:32:19,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:32:19,533 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 20 states. [2020-07-21 00:32:19,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:19,995 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-21 00:32:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:32:19,996 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 837 [2020-07-21 00:32:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:20,001 INFO L225 Difference]: With dead ends: 97 [2020-07-21 00:32:20,001 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 00:32:20,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1681 GetRequests, 1638 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 00:32:20,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 00:32:20,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-21 00:32:20,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 00:32:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 00:32:20,019 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 837 [2020-07-21 00:32:20,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:20,021 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 00:32:20,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:32:20,021 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 00:32:20,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 937 [2020-07-21 00:32:20,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:20,030 INFO L422 BasicCegarLoop]: trace histogram [143, 143, 72, 71, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:20,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:20,244 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:20,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:20,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1176387739, now seen corresponding path program 8 times [2020-07-21 00:32:20,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:20,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664332143] [2020-07-21 00:32:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:20,509 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:32:20,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:20,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:32:20,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 53037 backedges. 863 proven. 5431 refuted. 0 times theorem prover too weak. 46743 trivial. 0 not checked. [2020-07-21 00:32:20,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:24,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:26,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:26,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:27,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:27,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:27,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:27,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:28,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:28,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:28,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:28,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 53037 backedges. 863 proven. 5523 refuted. 0 times theorem prover too weak. 46651 trivial. 0 not checked. [2020-07-21 00:32:28,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664332143] [2020-07-21 00:32:28,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:28,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 00:32:28,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65592700] [2020-07-21 00:32:28,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:32:28,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:28,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:32:28,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:32:28,470 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 22 states. [2020-07-21 00:32:28,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:28,919 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-21 00:32:28,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:32:28,920 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 936 [2020-07-21 00:32:28,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:28,924 INFO L225 Difference]: With dead ends: 102 [2020-07-21 00:32:28,925 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 00:32:28,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1881 GetRequests, 1833 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 00:32:28,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 00:32:28,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-21 00:32:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 00:32:28,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 00:32:28,939 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 936 [2020-07-21 00:32:28,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:28,941 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 00:32:28,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:32:28,941 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 00:32:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1690 [2020-07-21 00:32:28,962 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:28,963 INFO L422 BasicCegarLoop]: trace histogram [245, 245, 212, 122, 122, 122, 122, 122, 122, 122, 90, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:29,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:29,179 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:29,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:29,180 INFO L82 PathProgramCache]: Analyzing trace with hash -263746810, now seen corresponding path program 8 times [2020-07-21 00:32:29,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:29,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906165434] [2020-07-21 00:32:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:29,580 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:32:29,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:29,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:32:29,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1790 proven. 10673 refuted. 0 times theorem prover too weak. 158987 trivial. 0 not checked. [2020-07-21 00:32:30,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:36,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:36,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:38,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:38,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:40,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:40,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:40,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:41,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:41,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:41,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:41,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1800 proven. 10755 refuted. 0 times theorem prover too weak. 158895 trivial. 0 not checked. [2020-07-21 00:32:42,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906165434] [2020-07-21 00:32:42,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:42,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 00:32:42,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106907388] [2020-07-21 00:32:42,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:32:42,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:42,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:32:42,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:32:42,417 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 22 states. [2020-07-21 00:32:42,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:42,911 INFO L93 Difference]: Finished difference Result 245 states and 2197 transitions. [2020-07-21 00:32:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:32:42,912 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1689 [2020-07-21 00:32:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:42,918 INFO L225 Difference]: With dead ends: 245 [2020-07-21 00:32:42,918 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 00:32:42,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3386 GetRequests, 3338 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 00:32:42,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 00:32:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-21 00:32:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 00:32:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 94 transitions. [2020-07-21 00:32:42,942 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 94 transitions. Word has length 1689 [2020-07-21 00:32:42,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:42,943 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 94 transitions. [2020-07-21 00:32:42,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:32:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 94 transitions. [2020-07-21 00:32:42,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2020-07-21 00:32:42,954 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:42,955 INFO L422 BasicCegarLoop]: trace histogram [151, 151, 122, 75, 75, 75, 75, 75, 75, 75, 47, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:43,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:43,170 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:43,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:43,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1302353203, now seen corresponding path program 9 times [2020-07-21 00:32:43,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:43,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853923403] [2020-07-21 00:32:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:43,510 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:32:43,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:43,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:32:43,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 1347 proven. 6076 refuted. 0 times theorem prover too weak. 56358 trivial. 0 not checked. [2020-07-21 00:32:44,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:48,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:49,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:50,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:51,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 1355 proven. 6160 refuted. 0 times theorem prover too weak. 56266 trivial. 0 not checked. [2020-07-21 00:32:52,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853923403] [2020-07-21 00:32:52,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:52,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 00:32:52,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213052330] [2020-07-21 00:32:52,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:32:52,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:52,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:32:52,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:32:52,398 INFO L87 Difference]: Start difference. First operand 69 states and 94 transitions. Second operand 22 states. [2020-07-21 00:32:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:52,790 INFO L93 Difference]: Finished difference Result 107 states and 145 transitions. [2020-07-21 00:32:52,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:32:52,791 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1035 [2020-07-21 00:32:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:52,795 INFO L225 Difference]: With dead ends: 107 [2020-07-21 00:32:52,795 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 00:32:52,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2078 GetRequests, 2030 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 00:32:52,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 00:32:52,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-07-21 00:32:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-21 00:32:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2020-07-21 00:32:52,807 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 1035 [2020-07-21 00:32:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:52,808 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2020-07-21 00:32:52,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:32:52,808 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2020-07-21 00:32:52,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2020-07-21 00:32:52,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:52,817 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 97, 60, 60, 60, 60, 60, 60, 60, 37, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:53,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:53,031 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:53,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:53,032 INFO L82 PathProgramCache]: Analyzing trace with hash -260964346, now seen corresponding path program 10 times [2020-07-21 00:32:53,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:53,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378579943] [2020-07-21 00:32:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:53,398 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:32:53,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:53,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:32:53,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1287 proven. 4357 refuted. 0 times theorem prover too weak. 35132 trivial. 0 not checked. [2020-07-21 00:32:53,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:57,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:59,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:59,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:59,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:00,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:00,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:00,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:00,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:00,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:00,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:00,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:01,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1293 proven. 4443 refuted. 0 times theorem prover too weak. 35040 trivial. 0 not checked. [2020-07-21 00:33:01,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378579943] [2020-07-21 00:33:01,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:33:01,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 00:33:01,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931999226] [2020-07-21 00:33:01,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:33:01,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:33:01,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:33:01,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:33:01,535 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand 22 states. [2020-07-21 00:33:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:33:01,900 INFO L93 Difference]: Finished difference Result 117 states and 160 transitions. [2020-07-21 00:33:01,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:33:01,901 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 830 [2020-07-21 00:33:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:33:01,904 INFO L225 Difference]: With dead ends: 117 [2020-07-21 00:33:01,904 INFO L226 Difference]: Without dead ends: 95 [2020-07-21 00:33:01,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1668 GetRequests, 1620 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 00:33:01,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-21 00:33:01,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2020-07-21 00:33:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 00:33:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2020-07-21 00:33:01,917 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 830 [2020-07-21 00:33:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:33:01,917 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2020-07-21 00:33:01,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:33:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2020-07-21 00:33:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2020-07-21 00:33:01,925 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:33:01,925 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:33:02,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:02,140 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:33:02,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:33:02,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 11 times [2020-07-21 00:33:02,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:33:02,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420892171] [2020-07-21 00:33:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:02,674 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:33:02,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:33:02,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 439 conjunts are in the unsatisfiable core [2020-07-21 00:33:02,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:33:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 00:33:03,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:33:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 00:33:16,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420892171] [2020-07-21 00:33:16,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:33:16,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-21 00:33:16,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059073699] [2020-07-21 00:33:16,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 00:33:16,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:33:16,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 00:33:16,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 00:33:16,277 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 36 states. [2020-07-21 00:33:17,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:33:17,284 INFO L93 Difference]: Finished difference Result 167 states and 272 transitions. [2020-07-21 00:33:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 00:33:17,285 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749 [2020-07-21 00:33:17,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:33:17,292 INFO L225 Difference]: With dead ends: 167 [2020-07-21 00:33:17,292 INFO L226 Difference]: Without dead ends: 160 [2020-07-21 00:33:17,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1499 GetRequests, 1462 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=1313, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 00:33:17,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-21 00:33:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2020-07-21 00:33:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 00:33:17,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 221 transitions. [2020-07-21 00:33:17,322 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 221 transitions. Word has length 749 [2020-07-21 00:33:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:33:17,323 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 221 transitions. [2020-07-21 00:33:17,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 00:33:17,323 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 221 transitions. [2020-07-21 00:33:17,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 882 [2020-07-21 00:33:17,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:33:17,337 INFO L422 BasicCegarLoop]: trace histogram [131, 131, 88, 65, 65, 65, 65, 65, 65, 65, 43, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:33:17,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:17,551 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:33:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:33:17,552 INFO L82 PathProgramCache]: Analyzing trace with hash -393055563, now seen corresponding path program 12 times [2020-07-21 00:33:17,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:33:17,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123742073] [2020-07-21 00:33:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:17,987 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:33:17,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:33:17,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:33:17,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:33:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 46208 backedges. 1040 proven. 4530 refuted. 0 times theorem prover too weak. 40638 trivial. 0 not checked. [2020-07-21 00:33:18,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:33:22,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:22,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:23,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:24,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:24,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:24,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:25,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:25,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:25,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:25,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 46208 backedges. 1043 proven. 4597 refuted. 0 times theorem prover too weak. 40568 trivial. 0 not checked. [2020-07-21 00:33:26,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123742073] [2020-07-21 00:33:26,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:33:26,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 00:33:26,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300143520] [2020-07-21 00:33:26,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:33:26,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:33:26,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:33:26,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:33:26,021 INFO L87 Difference]: Start difference. First operand 131 states and 221 transitions. Second operand 22 states. [2020-07-21 00:33:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:33:26,511 INFO L93 Difference]: Finished difference Result 292 states and 547 transitions. [2020-07-21 00:33:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:33:26,514 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 881 [2020-07-21 00:33:26,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:33:26,519 INFO L225 Difference]: With dead ends: 292 [2020-07-21 00:33:26,519 INFO L226 Difference]: Without dead ends: 131 [2020-07-21 00:33:26,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1769 GetRequests, 1724 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:33:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-21 00:33:26,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-07-21 00:33:26,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 00:33:26,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 207 transitions. [2020-07-21 00:33:26,548 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 207 transitions. Word has length 881 [2020-07-21 00:33:26,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:33:26,549 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 207 transitions. [2020-07-21 00:33:26,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:33:26,549 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 207 transitions. [2020-07-21 00:33:26,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-21 00:33:26,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:33:26,561 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:33:26,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:26,776 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:33:26,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:33:26,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1934761414, now seen corresponding path program 13 times [2020-07-21 00:33:26,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:33:26,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899658529] [2020-07-21 00:33:26,777 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:27,281 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:33:27,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:33:27,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 00:33:27,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:33:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1757 proven. 1940 refuted. 0 times theorem prover too weak. 31603 trivial. 0 not checked. [2020-07-21 00:33:27,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:33:30,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:30,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:30,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:30,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:31,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:31,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:31,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:31,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:31,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:31,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1762 proven. 1976 refuted. 0 times theorem prover too weak. 31562 trivial. 0 not checked. [2020-07-21 00:33:32,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899658529] [2020-07-21 00:33:32,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:33:32,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 00:33:32,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647282137] [2020-07-21 00:33:32,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:33:32,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:33:32,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:33:32,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:33:32,475 INFO L87 Difference]: Start difference. First operand 131 states and 207 transitions. Second operand 18 states. [2020-07-21 00:33:32,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:33:32,728 INFO L93 Difference]: Finished difference Result 176 states and 281 transitions. [2020-07-21 00:33:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:33:32,729 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 773 [2020-07-21 00:33:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:33:32,734 INFO L225 Difference]: With dead ends: 176 [2020-07-21 00:33:32,734 INFO L226 Difference]: Without dead ends: 164 [2020-07-21 00:33:32,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1551 GetRequests, 1516 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:33:32,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-21 00:33:32,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 142. [2020-07-21 00:33:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-21 00:33:32,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 224 transitions. [2020-07-21 00:33:32,763 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 224 transitions. Word has length 773 [2020-07-21 00:33:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:33:32,764 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 224 transitions. [2020-07-21 00:33:32,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:33:32,764 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 224 transitions. [2020-07-21 00:33:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-07-21 00:33:32,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:33:32,781 INFO L422 BasicCegarLoop]: trace histogram [125, 125, 88, 62, 62, 62, 62, 62, 62, 62, 37, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:33:32,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:32,996 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:33:32,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:33:32,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1643039650, now seen corresponding path program 14 times [2020-07-21 00:33:32,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:33:32,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959939777] [2020-07-21 00:33:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:33,464 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:33:33,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:33:33,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 00:33:33,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:33:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 42392 backedges. 1019 proven. 3681 refuted. 0 times theorem prover too weak. 37692 trivial. 0 not checked. [2020-07-21 00:33:33,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:33:37,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:38,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:38,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:38,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:39,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:39,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:39,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:39,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:39,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:39,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:39,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 42392 backedges. 1029 proven. 3724 refuted. 0 times theorem prover too weak. 37639 trivial. 0 not checked. [2020-07-21 00:33:39,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959939777] [2020-07-21 00:33:39,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:33:39,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 00:33:39,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006829850] [2020-07-21 00:33:39,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:33:39,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:33:39,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:33:39,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:33:39,979 INFO L87 Difference]: Start difference. First operand 142 states and 224 transitions. Second operand 20 states. [2020-07-21 00:33:40,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:33:40,355 INFO L93 Difference]: Finished difference Result 183 states and 294 transitions. [2020-07-21 00:33:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:33:40,357 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 845 [2020-07-21 00:33:40,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:33:40,363 INFO L225 Difference]: With dead ends: 183 [2020-07-21 00:33:40,363 INFO L226 Difference]: Without dead ends: 156 [2020-07-21 00:33:40,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1696 GetRequests, 1656 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 00:33:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-21 00:33:40,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2020-07-21 00:33:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 00:33:40,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 210 transitions. [2020-07-21 00:33:40,391 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 210 transitions. Word has length 845 [2020-07-21 00:33:40,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:33:40,392 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 210 transitions. [2020-07-21 00:33:40,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:33:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 210 transitions. [2020-07-21 00:33:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 764 [2020-07-21 00:33:40,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:33:40,406 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 90, 55, 55, 55, 55, 55, 55, 55, 35, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:33:40,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:40,621 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:33:40,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:33:40,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1955028575, now seen corresponding path program 15 times [2020-07-21 00:33:40,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:33:40,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782199631] [2020-07-21 00:33:40,623 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:41,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:33:41,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:33:41,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:33:41,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:33:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 34365 backedges. 1411 proven. 3185 refuted. 0 times theorem prover too weak. 29769 trivial. 0 not checked. [2020-07-21 00:33:41,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:33:44,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:46,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:46,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:46,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:46,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:47,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:47,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:47,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:47,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:47,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 34365 backedges. 1425 proven. 3243 refuted. 0 times theorem prover too weak. 29697 trivial. 0 not checked. [2020-07-21 00:33:47,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782199631] [2020-07-21 00:33:47,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:33:47,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 00:33:47,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387026010] [2020-07-21 00:33:47,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:33:47,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:33:47,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:33:47,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:33:47,858 INFO L87 Difference]: Start difference. First operand 134 states and 210 transitions. Second operand 20 states. [2020-07-21 00:33:48,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:33:48,224 INFO L93 Difference]: Finished difference Result 193 states and 303 transitions. [2020-07-21 00:33:48,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:33:48,226 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 763 [2020-07-21 00:33:48,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:33:48,233 INFO L225 Difference]: With dead ends: 193 [2020-07-21 00:33:48,233 INFO L226 Difference]: Without dead ends: 176 [2020-07-21 00:33:48,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1533 GetRequests, 1490 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 00:33:48,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-07-21 00:33:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 152. [2020-07-21 00:33:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-21 00:33:48,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 242 transitions. [2020-07-21 00:33:48,278 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 242 transitions. Word has length 763 [2020-07-21 00:33:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:33:48,279 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 242 transitions. [2020-07-21 00:33:48,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:33:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 242 transitions. [2020-07-21 00:33:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2020-07-21 00:33:48,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:33:48,302 INFO L422 BasicCegarLoop]: trace histogram [115, 115, 88, 57, 57, 57, 57, 57, 57, 57, 31, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:33:48,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:48,518 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:33:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:33:48,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1976418447, now seen corresponding path program 16 times [2020-07-21 00:33:48,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:33:48,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564718471] [2020-07-21 00:33:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:48,990 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:33:48,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:33:48,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:33:49,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:33:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 1009 proven. 3921 refuted. 0 times theorem prover too weak. 31502 trivial. 0 not checked. [2020-07-21 00:33:49,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:33:53,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:54,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:55,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:55,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:55,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:55,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:55,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:55,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:56,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:56,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:56,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:56,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:33:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 1010 proven. 3990 refuted. 0 times theorem prover too weak. 31432 trivial. 0 not checked. [2020-07-21 00:33:56,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564718471] [2020-07-21 00:33:56,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:33:56,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 00:33:56,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231850457] [2020-07-21 00:33:56,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:33:56,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:33:56,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:33:56,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:33:56,608 INFO L87 Difference]: Start difference. First operand 152 states and 242 transitions. Second operand 22 states. [2020-07-21 00:33:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:33:56,992 INFO L93 Difference]: Finished difference Result 191 states and 297 transitions. [2020-07-21 00:33:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:33:56,993 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 785 [2020-07-21 00:33:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:33:56,997 INFO L225 Difference]: With dead ends: 191 [2020-07-21 00:33:56,998 INFO L226 Difference]: Without dead ends: 161 [2020-07-21 00:33:57,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1577 GetRequests, 1532 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:33:57,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-07-21 00:33:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 149. [2020-07-21 00:33:57,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-21 00:33:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 236 transitions. [2020-07-21 00:33:57,024 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 236 transitions. Word has length 785 [2020-07-21 00:33:57,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:33:57,025 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 236 transitions. [2020-07-21 00:33:57,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:33:57,025 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 236 transitions. [2020-07-21 00:33:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 00:33:57,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:33:57,039 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:33:57,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:57,253 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:33:57,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:33:57,253 INFO L82 PathProgramCache]: Analyzing trace with hash 514107411, now seen corresponding path program 17 times [2020-07-21 00:33:57,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:33:57,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230663687] [2020-07-21 00:33:57,254 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:33:57,884 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:33:57,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:33:57,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 00:33:57,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:33:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 1890 proven. 1747 refuted. 0 times theorem prover too weak. 30551 trivial. 0 not checked. [2020-07-21 00:33:58,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:00,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:01,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:01,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:01,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:01,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:01,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:01,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:02,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:02,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 1893 proven. 1785 refuted. 0 times theorem prover too weak. 30510 trivial. 0 not checked. [2020-07-21 00:34:03,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230663687] [2020-07-21 00:34:03,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:03,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 00:34:03,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205158642] [2020-07-21 00:34:03,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:34:03,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:03,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:34:03,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:34:03,386 INFO L87 Difference]: Start difference. First operand 149 states and 236 transitions. Second operand 18 states. [2020-07-21 00:34:03,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:03,706 INFO L93 Difference]: Finished difference Result 214 states and 332 transitions. [2020-07-21 00:34:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:34:03,708 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 761 [2020-07-21 00:34:03,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:03,714 INFO L225 Difference]: With dead ends: 214 [2020-07-21 00:34:03,714 INFO L226 Difference]: Without dead ends: 202 [2020-07-21 00:34:03,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1527 GetRequests, 1492 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:34:03,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-21 00:34:03,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2020-07-21 00:34:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-21 00:34:03,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 253 transitions. [2020-07-21 00:34:03,749 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 253 transitions. Word has length 761 [2020-07-21 00:34:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:03,749 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 253 transitions. [2020-07-21 00:34:03,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:34:03,750 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 253 transitions. [2020-07-21 00:34:03,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2020-07-21 00:34:03,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:03,764 INFO L422 BasicCegarLoop]: trace histogram [117, 117, 88, 58, 58, 58, 58, 58, 58, 58, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:03,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:03,979 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:03,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:03,980 INFO L82 PathProgramCache]: Analyzing trace with hash 691746214, now seen corresponding path program 18 times [2020-07-21 00:34:03,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:03,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217933492] [2020-07-21 00:34:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:04,553 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:34:04,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 00:34:04,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 37584 backedges. 1383 proven. 3037 refuted. 0 times theorem prover too weak. 33164 trivial. 0 not checked. [2020-07-21 00:34:04,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:08,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:09,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:09,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:09,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:09,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:10,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:10,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:10,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:10,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:10,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:10,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:10,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 37584 backedges. 1389 proven. 3084 refuted. 0 times theorem prover too weak. 33111 trivial. 0 not checked. [2020-07-21 00:34:11,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217933492] [2020-07-21 00:34:11,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:11,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 00:34:11,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34440885] [2020-07-21 00:34:11,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:34:11,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:11,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:34:11,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:34:11,144 INFO L87 Difference]: Start difference. First operand 160 states and 253 transitions. Second operand 20 states. [2020-07-21 00:34:11,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:11,493 INFO L93 Difference]: Finished difference Result 255 states and 407 transitions. [2020-07-21 00:34:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:34:11,495 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 797 [2020-07-21 00:34:11,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:11,504 INFO L225 Difference]: With dead ends: 255 [2020-07-21 00:34:11,504 INFO L226 Difference]: Without dead ends: 228 [2020-07-21 00:34:11,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1600 GetRequests, 1560 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 00:34:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-21 00:34:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 173. [2020-07-21 00:34:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-21 00:34:11,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 275 transitions. [2020-07-21 00:34:11,560 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 275 transitions. Word has length 797 [2020-07-21 00:34:11,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:11,561 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 275 transitions. [2020-07-21 00:34:11,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:34:11,562 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 275 transitions. [2020-07-21 00:34:11,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2020-07-21 00:34:11,580 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:11,581 INFO L422 BasicCegarLoop]: trace histogram [119, 119, 89, 59, 59, 59, 59, 59, 59, 59, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:11,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:11,797 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:11,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1991593041, now seen corresponding path program 19 times [2020-07-21 00:34:11,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:11,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411291913] [2020-07-21 00:34:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:12,364 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:34:12,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:12,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:34:12,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 38844 backedges. 1206 proven. 3892 refuted. 0 times theorem prover too weak. 33746 trivial. 0 not checked. [2020-07-21 00:34:12,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:16,504 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:34:16,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:16,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:18,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:18,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:19,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:19,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:19,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:19,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:19,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:19,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:19,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:20,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:20,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 38844 backedges. 1205 proven. 3963 refuted. 0 times theorem prover too weak. 33676 trivial. 0 not checked. [2020-07-21 00:34:20,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411291913] [2020-07-21 00:34:20,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:20,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 00:34:20,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796963548] [2020-07-21 00:34:20,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:34:20,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:20,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:34:20,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:34:20,640 INFO L87 Difference]: Start difference. First operand 173 states and 275 transitions. Second operand 22 states. [2020-07-21 00:34:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:21,082 INFO L93 Difference]: Finished difference Result 228 states and 353 transitions. [2020-07-21 00:34:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:34:21,084 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 810 [2020-07-21 00:34:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:21,093 INFO L225 Difference]: With dead ends: 228 [2020-07-21 00:34:21,094 INFO L226 Difference]: Without dead ends: 203 [2020-07-21 00:34:21,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1627 GetRequests, 1582 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:34:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-07-21 00:34:21,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 149. [2020-07-21 00:34:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-21 00:34:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 235 transitions. [2020-07-21 00:34:21,131 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 235 transitions. Word has length 810 [2020-07-21 00:34:21,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:21,132 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 235 transitions. [2020-07-21 00:34:21,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:34:21,133 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 235 transitions. [2020-07-21 00:34:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2020-07-21 00:34:21,151 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:21,152 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 90, 56, 56, 56, 56, 56, 56, 56, 34, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:21,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:21,366 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:21,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:21,367 INFO L82 PathProgramCache]: Analyzing trace with hash -628162504, now seen corresponding path program 20 times [2020-07-21 00:34:21,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:21,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114401660] [2020-07-21 00:34:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:22,016 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:34:22,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:22,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:34:22,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 35477 backedges. 2095 proven. 2577 refuted. 0 times theorem prover too weak. 30805 trivial. 0 not checked. [2020-07-21 00:34:22,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:26,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:27,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:28,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:28,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:28,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:28,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:28,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:28,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:28,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:28,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:28,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:29,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:29,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 35477 backedges. 2107 proven. 2637 refuted. 0 times theorem prover too weak. 30733 trivial. 0 not checked. [2020-07-21 00:34:30,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114401660] [2020-07-21 00:34:30,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:30,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 00:34:30,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164360773] [2020-07-21 00:34:30,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:34:30,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:30,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:34:30,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:34:30,187 INFO L87 Difference]: Start difference. First operand 149 states and 235 transitions. Second operand 20 states. [2020-07-21 00:34:30,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:30,612 INFO L93 Difference]: Finished difference Result 221 states and 345 transitions. [2020-07-21 00:34:30,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:34:30,614 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 775 [2020-07-21 00:34:30,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:30,619 INFO L225 Difference]: With dead ends: 221 [2020-07-21 00:34:30,620 INFO L226 Difference]: Without dead ends: 209 [2020-07-21 00:34:30,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1557 GetRequests, 1514 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 00:34:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-07-21 00:34:30,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 167. [2020-07-21 00:34:30,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-07-21 00:34:30,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 263 transitions. [2020-07-21 00:34:30,660 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 263 transitions. Word has length 775 [2020-07-21 00:34:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:30,661 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 263 transitions. [2020-07-21 00:34:30,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:34:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 263 transitions. [2020-07-21 00:34:30,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 763 [2020-07-21 00:34:30,677 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:30,677 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 89, 55, 55, 55, 55, 55, 55, 55, 34, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:30,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:30,891 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:30,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:30,891 INFO L82 PathProgramCache]: Analyzing trace with hash 214059397, now seen corresponding path program 21 times [2020-07-21 00:34:30,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:30,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127979301] [2020-07-21 00:34:30,892 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:31,556 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:34:31,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:31,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 00:34:31,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 34276 backedges. 1921 proven. 2296 refuted. 0 times theorem prover too weak. 30059 trivial. 0 not checked. [2020-07-21 00:34:31,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:35,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:35,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:36,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:36,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:36,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:36,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:36,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:37,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:37,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:37,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:37,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 34276 backedges. 1925 proven. 2345 refuted. 0 times theorem prover too weak. 30006 trivial. 0 not checked. [2020-07-21 00:34:38,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127979301] [2020-07-21 00:34:38,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:38,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 00:34:38,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541429759] [2020-07-21 00:34:38,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:34:38,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:38,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:34:38,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:34:38,593 INFO L87 Difference]: Start difference. First operand 167 states and 263 transitions. Second operand 20 states. [2020-07-21 00:34:39,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:39,007 INFO L93 Difference]: Finished difference Result 259 states and 402 transitions. [2020-07-21 00:34:39,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:34:39,009 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 762 [2020-07-21 00:34:39,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:39,015 INFO L225 Difference]: With dead ends: 259 [2020-07-21 00:34:39,015 INFO L226 Difference]: Without dead ends: 242 [2020-07-21 00:34:39,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1530 GetRequests, 1490 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 00:34:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-21 00:34:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 159. [2020-07-21 00:34:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-21 00:34:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 247 transitions. [2020-07-21 00:34:39,049 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 247 transitions. Word has length 762 [2020-07-21 00:34:39,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:39,050 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 247 transitions. [2020-07-21 00:34:39,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:34:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 247 transitions. [2020-07-21 00:34:39,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 00:34:39,064 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:39,064 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 89, 54, 54, 54, 54, 54, 54, 54, 35, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:39,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:39,279 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:39,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:39,280 INFO L82 PathProgramCache]: Analyzing trace with hash -193438124, now seen corresponding path program 22 times [2020-07-21 00:34:39,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:39,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826622069] [2020-07-21 00:34:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:39,997 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:34:39,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:40,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1252 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:34:40,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 3182 proven. 1330 refuted. 0 times theorem prover too weak. 28672 trivial. 0 not checked. [2020-07-21 00:34:40,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:43,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:44,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:45,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:45,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:45,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:45,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:45,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:45,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:45,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:45,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:45,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:46,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:46,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 3192 proven. 1392 refuted. 0 times theorem prover too weak. 28600 trivial. 0 not checked. [2020-07-21 00:34:48,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826622069] [2020-07-21 00:34:48,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:48,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 00:34:48,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260985971] [2020-07-21 00:34:48,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:34:48,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:48,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:34:48,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:34:48,234 INFO L87 Difference]: Start difference. First operand 159 states and 247 transitions. Second operand 20 states. [2020-07-21 00:34:48,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:48,787 INFO L93 Difference]: Finished difference Result 254 states and 394 transitions. [2020-07-21 00:34:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:34:48,789 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 750 [2020-07-21 00:34:48,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:48,798 INFO L225 Difference]: With dead ends: 254 [2020-07-21 00:34:48,798 INFO L226 Difference]: Without dead ends: 247 [2020-07-21 00:34:48,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1507 GetRequests, 1464 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 00:34:48,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-07-21 00:34:48,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 182. [2020-07-21 00:34:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-07-21 00:34:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 282 transitions. [2020-07-21 00:34:48,837 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 282 transitions. Word has length 750 [2020-07-21 00:34:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:48,838 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 282 transitions. [2020-07-21 00:34:48,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:34:48,838 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 282 transitions. [2020-07-21 00:34:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-21 00:34:48,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:48,852 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:49,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:49,068 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1129228228, now seen corresponding path program 23 times [2020-07-21 00:34:49,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:49,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040290590] [2020-07-21 00:34:49,070 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:49,786 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:34:49,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:49,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:34:49,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 2169 proven. 2681 refuted. 0 times theorem prover too weak. 30450 trivial. 0 not checked. [2020-07-21 00:34:50,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:55,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:56,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:56,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:57,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:57,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:57,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:57,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:57,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:58,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 2164 proven. 2756 refuted. 0 times theorem prover too weak. 30380 trivial. 0 not checked. [2020-07-21 00:34:59,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040290590] [2020-07-21 00:34:59,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:59,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 00:34:59,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722512759] [2020-07-21 00:34:59,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:34:59,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:59,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:34:59,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:34:59,301 INFO L87 Difference]: Start difference. First operand 182 states and 282 transitions. Second operand 22 states. [2020-07-21 00:34:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:59,821 INFO L93 Difference]: Finished difference Result 407 states and 643 transitions. [2020-07-21 00:34:59,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:34:59,824 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 773 [2020-07-21 00:34:59,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:59,839 INFO L225 Difference]: With dead ends: 407 [2020-07-21 00:34:59,840 INFO L226 Difference]: Without dead ends: 371 [2020-07-21 00:34:59,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1508 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:34:59,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-07-21 00:34:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 192. [2020-07-21 00:34:59,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-21 00:34:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 305 transitions. [2020-07-21 00:34:59,903 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 305 transitions. Word has length 773 [2020-07-21 00:34:59,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:59,904 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 305 transitions. [2020-07-21 00:34:59,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:34:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 305 transitions. [2020-07-21 00:34:59,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2020-07-21 00:34:59,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:59,920 INFO L422 BasicCegarLoop]: trace histogram [115, 115, 88, 57, 57, 57, 57, 57, 57, 57, 31, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:00,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:00,135 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:00,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:00,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1869165065, now seen corresponding path program 24 times [2020-07-21 00:35:00,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:00,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519014631] [2020-07-21 00:35:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:00,884 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:35:00,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:00,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:35:00,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 1521 proven. 3409 refuted. 0 times theorem prover too weak. 31502 trivial. 0 not checked. [2020-07-21 00:35:01,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:06,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:06,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:07,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:07,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:08,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:09,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:09,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:09,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:09,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:09,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:09,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:09,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 1518 proven. 3482 refuted. 0 times theorem prover too weak. 31432 trivial. 0 not checked. [2020-07-21 00:35:10,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519014631] [2020-07-21 00:35:10,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:35:10,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 00:35:10,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756914203] [2020-07-21 00:35:10,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:35:10,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:10,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:35:10,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:35:10,502 INFO L87 Difference]: Start difference. First operand 192 states and 305 transitions. Second operand 22 states. [2020-07-21 00:35:11,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:11,100 INFO L93 Difference]: Finished difference Result 289 states and 444 transitions. [2020-07-21 00:35:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:35:11,103 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 785 [2020-07-21 00:35:11,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:11,115 INFO L225 Difference]: With dead ends: 289 [2020-07-21 00:35:11,115 INFO L226 Difference]: Without dead ends: 259 [2020-07-21 00:35:11,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1577 GetRequests, 1532 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:35:11,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-07-21 00:35:11,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 156. [2020-07-21 00:35:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-21 00:35:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 237 transitions. [2020-07-21 00:35:11,157 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 237 transitions. Word has length 785 [2020-07-21 00:35:11,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:11,158 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 237 transitions. [2020-07-21 00:35:11,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:35:11,158 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 237 transitions. [2020-07-21 00:35:11,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 00:35:11,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:11,176 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:11,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:11,390 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:11,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:11,391 INFO L82 PathProgramCache]: Analyzing trace with hash -435112683, now seen corresponding path program 25 times [2020-07-21 00:35:11,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:11,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416776059] [2020-07-21 00:35:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:12,448 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:35:12,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:12,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 00:35:12,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2984 proven. 1226 refuted. 0 times theorem prover too weak. 29978 trivial. 0 not checked. [2020-07-21 00:35:12,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:16,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:16,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:17,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:17,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:17,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:17,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:18,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:18,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:18,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:18,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:18,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:19,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2986 proven. 1277 refuted. 0 times theorem prover too weak. 29925 trivial. 0 not checked. [2020-07-21 00:35:21,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416776059] [2020-07-21 00:35:21,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:35:21,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 00:35:21,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221745344] [2020-07-21 00:35:21,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:35:21,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:21,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:35:21,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:35:21,570 INFO L87 Difference]: Start difference. First operand 156 states and 237 transitions. Second operand 20 states. [2020-07-21 00:35:22,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:22,103 INFO L93 Difference]: Finished difference Result 302 states and 461 transitions. [2020-07-21 00:35:22,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:35:22,105 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 761 [2020-07-21 00:35:22,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:22,114 INFO L225 Difference]: With dead ends: 302 [2020-07-21 00:35:22,114 INFO L226 Difference]: Without dead ends: 295 [2020-07-21 00:35:22,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 1488 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 00:35:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-07-21 00:35:22,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 179. [2020-07-21 00:35:22,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-07-21 00:35:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 271 transitions. [2020-07-21 00:35:22,158 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 271 transitions. Word has length 761 [2020-07-21 00:35:22,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:22,158 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 271 transitions. [2020-07-21 00:35:22,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:35:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 271 transitions. [2020-07-21 00:35:22,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 00:35:22,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:22,171 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:22,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:22,382 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:22,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:22,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1365832043, now seen corresponding path program 26 times [2020-07-21 00:35:22,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:22,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009062613] [2020-07-21 00:35:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:23,319 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:35:23,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:23,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:35:23,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3378 proven. 1392 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-21 00:35:23,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:27,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:28,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:29,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:30,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:30,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:30,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:30,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:30,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:30,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:30,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:30,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:31,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3371 proven. 1469 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-21 00:35:33,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009062613] [2020-07-21 00:35:33,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:35:33,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 00:35:33,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469599110] [2020-07-21 00:35:33,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:35:33,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:33,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:35:33,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:35:33,704 INFO L87 Difference]: Start difference. First operand 179 states and 271 transitions. Second operand 22 states. [2020-07-21 00:35:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:34,385 INFO L93 Difference]: Finished difference Result 433 states and 670 transitions. [2020-07-21 00:35:34,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:35:34,387 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-21 00:35:34,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:34,402 INFO L225 Difference]: With dead ends: 433 [2020-07-21 00:35:34,402 INFO L226 Difference]: Without dead ends: 371 [2020-07-21 00:35:34,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:35:34,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-07-21 00:35:34,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 101. [2020-07-21 00:35:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-21 00:35:34,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 149 transitions. [2020-07-21 00:35:34,440 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 149 transitions. Word has length 761 [2020-07-21 00:35:34,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:34,441 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 149 transitions. [2020-07-21 00:35:34,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:35:34,441 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 149 transitions. [2020-07-21 00:35:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 00:35:34,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:34,539 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 89, 54, 54, 54, 54, 54, 54, 54, 35, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:34,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:34,740 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:34,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:34,742 INFO L82 PathProgramCache]: Analyzing trace with hash 19782726, now seen corresponding path program 27 times [2020-07-21 00:35:34,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:34,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805037065] [2020-07-21 00:35:34,743 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:35,503 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:35:35,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:35,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:35:35,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 805 proven. 4251 refuted. 0 times theorem prover too weak. 28128 trivial. 0 not checked. [2020-07-21 00:35:36,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:42,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:42,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:43,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:45,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:45,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:45,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:46,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:46,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:47,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:47,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:47,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 819 proven. 4329 refuted. 0 times theorem prover too weak. 28036 trivial. 0 not checked. [2020-07-21 00:35:47,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805037065] [2020-07-21 00:35:47,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:35:47,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 00:35:47,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548945217] [2020-07-21 00:35:47,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:35:47,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:47,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:35:47,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:35:47,517 INFO L87 Difference]: Start difference. First operand 101 states and 149 transitions. Second operand 22 states. [2020-07-21 00:35:48,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:48,274 INFO L93 Difference]: Finished difference Result 271 states and 409 transitions. [2020-07-21 00:35:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:35:48,276 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 750 [2020-07-21 00:35:48,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:48,281 INFO L225 Difference]: With dead ends: 271 [2020-07-21 00:35:48,281 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 00:35:48,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1508 GetRequests, 1460 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 00:35:48,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 00:35:48,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-07-21 00:35:48,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-21 00:35:48,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-07-21 00:35:48,300 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 750 [2020-07-21 00:35:48,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:48,301 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-07-21 00:35:48,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:35:48,301 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-07-21 00:35:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 00:35:48,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:48,310 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:48,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:48,525 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:48,525 INFO L82 PathProgramCache]: Analyzing trace with hash 795943445, now seen corresponding path program 28 times [2020-07-21 00:35:48,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:48,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953598079] [2020-07-21 00:35:48,526 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:49,336 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:35:49,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:49,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:35:49,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 872 proven. 3898 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-21 00:35:49,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:55,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:57,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:58,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:58,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:59,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:59,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:00,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:00,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:00,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:00,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:00,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:00,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 877 proven. 3963 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-21 00:36:01,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953598079] [2020-07-21 00:36:01,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:36:01,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 00:36:01,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619318764] [2020-07-21 00:36:01,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:36:01,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:36:01,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:36:01,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:36:01,025 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 22 states. [2020-07-21 00:36:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:36:01,510 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2020-07-21 00:36:01,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:36:01,512 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-21 00:36:01,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:36:01,515 INFO L225 Difference]: With dead ends: 135 [2020-07-21 00:36:01,516 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 00:36:01,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:36:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 00:36:01,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-07-21 00:36:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 00:36:01,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2020-07-21 00:36:01,529 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 761 [2020-07-21 00:36:01,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:36:01,529 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2020-07-21 00:36:01,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:36:01,529 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2020-07-21 00:36:01,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 00:36:01,537 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:36:01,537 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:36:01,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:36:01,743 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:36:01,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:36:01,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1599781781, now seen corresponding path program 29 times [2020-07-21 00:36:01,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:36:01,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033739474] [2020-07-21 00:36:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:36:02,598 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:36:02,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:36:02,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 00:36:02,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:36:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 883 proven. 4434 refuted. 0 times theorem prover too weak. 28871 trivial. 0 not checked. [2020-07-21 00:36:03,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:36:10,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:12,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:14,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:15,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:15,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:15,962 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 00:36:16,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:16,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:17,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:17,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 875 proven. 4534 refuted. 0 times theorem prover too weak. 28779 trivial. 0 not checked. [2020-07-21 00:36:17,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033739474] [2020-07-21 00:36:17,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:36:17,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 00:36:17,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200109726] [2020-07-21 00:36:17,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:36:17,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:36:17,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:36:17,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:36:17,549 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 24 states. [2020-07-21 00:36:18,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:36:18,468 INFO L93 Difference]: Finished difference Result 219 states and 262 transitions. [2020-07-21 00:36:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:36:18,471 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 761 [2020-07-21 00:36:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:36:18,474 INFO L225 Difference]: With dead ends: 219 [2020-07-21 00:36:18,474 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 00:36:18,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1530 GetRequests, 1480 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 00:36:18,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 00:36:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 00:36:18,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 00:36:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 00:36:18,487 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 761 [2020-07-21 00:36:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:36:18,487 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 00:36:18,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:36:18,488 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 00:36:18,488 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 00:36:18,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:36:18,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 00:36:20,313 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:36:26,434 WARN L193 SmtUtils]: Spent 6.12 s on a formula simplification. DAG size of input: 653 DAG size of output: 246 [2020-07-21 00:36:26,581 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:36:32,961 WARN L193 SmtUtils]: Spent 6.38 s on a formula simplification. DAG size of input: 695 DAG size of output: 285 [2020-07-21 00:36:39,705 WARN L193 SmtUtils]: Spent 6.74 s on a formula simplification. DAG size of input: 725 DAG size of output: 285 [2020-07-21 00:36:40,187 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 94 [2020-07-21 00:36:40,819 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 104 [2020-07-21 00:36:47,248 WARN L193 SmtUtils]: Spent 6.43 s on a formula simplification. DAG size of input: 720 DAG size of output: 281 [2020-07-21 00:36:53,677 WARN L193 SmtUtils]: Spent 6.43 s on a formula simplification. DAG size of input: 702 DAG size of output: 285 [2020-07-21 00:36:53,829 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:37:00,083 WARN L193 SmtUtils]: Spent 6.25 s on a formula simplification. DAG size of input: 695 DAG size of output: 285 [2020-07-21 00:37:00,232 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:37:01,332 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 423 DAG size of output: 110 [2020-07-21 00:37:02,661 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 436 DAG size of output: 116 [2020-07-21 00:37:09,287 WARN L193 SmtUtils]: Spent 6.62 s on a formula simplification. DAG size of input: 716 DAG size of output: 285 [2020-07-21 00:37:09,708 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 94 [2020-07-21 00:37:16,888 WARN L193 SmtUtils]: Spent 7.18 s on a formula simplification. DAG size of input: 720 DAG size of output: 281 [2020-07-21 00:37:17,039 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:37:18,164 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 423 DAG size of output: 110 [2020-07-21 00:37:23,048 WARN L193 SmtUtils]: Spent 4.88 s on a formula simplification. DAG size of input: 653 DAG size of output: 246 [2020-07-21 00:37:29,219 WARN L193 SmtUtils]: Spent 6.17 s on a formula simplification. DAG size of input: 695 DAG size of output: 285 [2020-07-21 00:37:29,870 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 104 [2020-07-21 00:37:36,629 WARN L193 SmtUtils]: Spent 6.76 s on a formula simplification. DAG size of input: 725 DAG size of output: 285 [2020-07-21 00:37:36,782 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:37:37,193 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 94 [2020-07-21 00:37:43,272 WARN L193 SmtUtils]: Spent 6.08 s on a formula simplification. DAG size of input: 695 DAG size of output: 285 [2020-07-21 00:37:44,581 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 435 DAG size of output: 116 [2020-07-21 00:37:50,680 WARN L193 SmtUtils]: Spent 6.10 s on a formula simplification. DAG size of input: 695 DAG size of output: 285 [2020-07-21 00:37:51,828 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 422 DAG size of output: 110 [2020-07-21 00:37:51,981 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:37:58,858 WARN L193 SmtUtils]: Spent 6.87 s on a formula simplification. DAG size of input: 725 DAG size of output: 285 [2020-07-21 00:37:59,311 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 94 [2020-07-21 00:38:06,067 WARN L193 SmtUtils]: Spent 6.75 s on a formula simplification. DAG size of input: 716 DAG size of output: 285 [2020-07-21 00:38:06,220 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:38:08,011 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 477 DAG size of output: 163 [2020-07-21 00:38:08,436 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 94 [2020-07-21 00:38:10,253 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 477 DAG size of output: 163 [2020-07-21 00:38:16,521 WARN L193 SmtUtils]: Spent 6.26 s on a formula simplification. DAG size of input: 686 DAG size of output: 285 [2020-07-21 00:38:16,677 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:38:17,806 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 422 DAG size of output: 110 [2020-07-21 00:38:24,500 WARN L193 SmtUtils]: Spent 6.69 s on a formula simplification. DAG size of input: 720 DAG size of output: 281 [2020-07-21 00:38:26,004 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 456 DAG size of output: 123 [2020-07-21 00:38:26,441 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 94 [2020-07-21 00:38:32,913 WARN L193 SmtUtils]: Spent 6.47 s on a formula simplification. DAG size of input: 695 DAG size of output: 285 [2020-07-21 00:38:37,909 WARN L193 SmtUtils]: Spent 4.99 s on a formula simplification. DAG size of input: 653 DAG size of output: 246 [2020-07-21 00:38:38,067 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:38:44,939 WARN L193 SmtUtils]: Spent 6.87 s on a formula simplification. DAG size of input: 716 DAG size of output: 285 [2020-07-21 00:38:51,764 WARN L193 SmtUtils]: Spent 6.82 s on a formula simplification. DAG size of input: 724 DAG size of output: 285 [2020-07-21 00:38:57,987 WARN L193 SmtUtils]: Spent 6.22 s on a formula simplification. DAG size of input: 695 DAG size of output: 285 [2020-07-21 00:38:58,171 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 65 [2020-07-21 00:38:58,600 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 94 [2020-07-21 00:38:58,754 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:38:59,176 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 94 [2020-07-21 00:39:04,364 WARN L193 SmtUtils]: Spent 5.19 s on a formula simplification. DAG size of input: 657 DAG size of output: 250 [2020-07-21 00:39:09,550 WARN L193 SmtUtils]: Spent 5.18 s on a formula simplification. DAG size of input: 657 DAG size of output: 250 [2020-07-21 00:39:16,169 WARN L193 SmtUtils]: Spent 6.61 s on a formula simplification. DAG size of input: 720 DAG size of output: 281 [2020-07-21 00:39:23,108 WARN L193 SmtUtils]: Spent 6.94 s on a formula simplification. DAG size of input: 724 DAG size of output: 285 [2020-07-21 00:39:23,272 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:39:29,437 WARN L193 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 686 DAG size of output: 285 [2020-07-21 00:39:29,618 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 65 [2020-07-21 00:39:35,844 WARN L193 SmtUtils]: Spent 6.22 s on a formula simplification. DAG size of input: 695 DAG size of output: 285 [2020-07-21 00:39:36,269 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 94 [2020-07-21 00:39:41,532 WARN L193 SmtUtils]: Spent 5.26 s on a formula simplification. DAG size of input: 657 DAG size of output: 250 [2020-07-21 00:39:47,902 WARN L193 SmtUtils]: Spent 6.37 s on a formula simplification. DAG size of input: 695 DAG size of output: 285 [2020-07-21 00:39:48,094 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 00:39:54,834 WARN L193 SmtUtils]: Spent 6.74 s on a formula simplification. DAG size of input: 720 DAG size of output: 281 [2020-07-21 00:39:54,990 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:40:02,006 WARN L193 SmtUtils]: Spent 7.01 s on a formula simplification. DAG size of input: 724 DAG size of output: 285 [2020-07-21 00:40:02,170 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:40:08,663 WARN L193 SmtUtils]: Spent 6.49 s on a formula simplification. DAG size of input: 686 DAG size of output: 285 [2020-07-21 00:40:09,098 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 94 [2020-07-21 00:40:12,681 WARN L193 SmtUtils]: Spent 3.58 s on a formula simplification. DAG size of input: 570 DAG size of output: 212 [2020-07-21 00:40:12,846 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:40:19,829 WARN L193 SmtUtils]: Spent 6.98 s on a formula simplification. DAG size of input: 724 DAG size of output: 285 [2020-07-21 00:40:23,288 WARN L193 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 570 DAG size of output: 212 [2020-07-21 00:40:23,731 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 94 [2020-07-21 00:40:29,993 WARN L193 SmtUtils]: Spent 6.26 s on a formula simplification. DAG size of input: 695 DAG size of output: 285 [2020-07-21 00:40:30,157 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:40:35,412 WARN L193 SmtUtils]: Spent 5.25 s on a formula simplification. DAG size of input: 656 DAG size of output: 250 [2020-07-21 00:40:35,855 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 94 [2020-07-21 00:40:42,936 WARN L193 SmtUtils]: Spent 7.08 s on a formula simplification. DAG size of input: 724 DAG size of output: 286 [2020-07-21 00:40:43,093 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:40:49,584 WARN L193 SmtUtils]: Spent 6.49 s on a formula simplification. DAG size of input: 695 DAG size of output: 285 [2020-07-21 00:40:50,531 WARN L193 SmtUtils]: Spent 943.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 118 [2020-07-21 00:40:50,956 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 94 [2020-07-21 00:40:57,215 WARN L193 SmtUtils]: Spent 6.26 s on a formula simplification. DAG size of input: 690 DAG size of output: 281 [2020-07-21 00:41:04,316 WARN L193 SmtUtils]: Spent 7.09 s on a formula simplification. DAG size of input: 724 DAG size of output: 286 [2020-07-21 00:41:12,779 WARN L193 SmtUtils]: Spent 8.46 s on a formula simplification. DAG size of input: 730 DAG size of output: 301 [2020-07-21 00:41:19,959 WARN L193 SmtUtils]: Spent 7.18 s on a formula simplification. DAG size of input: 723 DAG size of output: 286 [2020-07-21 00:41:20,119 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:41:26,393 WARN L193 SmtUtils]: Spent 6.27 s on a formula simplification. DAG size of input: 686 DAG size of output: 285 [2020-07-21 00:41:27,211 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 116 [2020-07-21 00:41:30,721 WARN L193 SmtUtils]: Spent 3.51 s on a formula simplification. DAG size of input: 570 DAG size of output: 211 [2020-07-21 00:41:31,179 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 94 [2020-07-21 00:41:33,214 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 634 DAG size of output: 226 [2020-07-21 00:41:36,769 WARN L193 SmtUtils]: Spent 3.55 s on a formula simplification. DAG size of input: 570 DAG size of output: 211 [2020-07-21 00:41:43,669 WARN L193 SmtUtils]: Spent 6.90 s on a formula simplification. DAG size of input: 725 DAG size of output: 285 [2020-07-21 00:41:43,830 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:41:49,871 WARN L193 SmtUtils]: Spent 6.04 s on a formula simplification. DAG size of input: 690 DAG size of output: 281 [2020-07-21 00:41:50,615 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 111 [2020-07-21 00:41:57,529 WARN L193 SmtUtils]: Spent 6.91 s on a formula simplification. DAG size of input: 725 DAG size of output: 285 [2020-07-21 00:42:00,239 WARN L193 SmtUtils]: Spent 2.71 s on a formula simplification. DAG size of input: 541 DAG size of output: 195 [2020-07-21 00:42:06,850 WARN L193 SmtUtils]: Spent 6.61 s on a formula simplification. DAG size of input: 704 DAG size of output: 284 [2020-07-21 00:42:07,010 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:42:07,445 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 94 [2020-07-21 00:42:10,058 WARN L193 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 541 DAG size of output: 195 [2020-07-21 00:42:16,226 WARN L193 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 686 DAG size of output: 285 [2020-07-21 00:42:23,096 WARN L193 SmtUtils]: Spent 6.86 s on a formula simplification. DAG size of input: 725 DAG size of output: 285 [2020-07-21 00:42:23,532 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 94 [2020-07-21 00:42:29,690 WARN L193 SmtUtils]: Spent 6.15 s on a formula simplification. DAG size of input: 690 DAG size of output: 281 [2020-07-21 00:42:36,514 WARN L193 SmtUtils]: Spent 6.82 s on a formula simplification. DAG size of input: 725 DAG size of output: 285 [2020-07-21 00:42:36,978 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 94 [2020-07-21 00:42:37,843 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 114 [2020-07-21 00:42:44,877 WARN L193 SmtUtils]: Spent 7.03 s on a formula simplification. DAG size of input: 725 DAG size of output: 285 [2020-07-21 00:42:51,226 WARN L193 SmtUtils]: Spent 6.35 s on a formula simplification. DAG size of input: 694 DAG size of output: 285 [2020-07-21 00:42:52,002 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 111 [2020-07-21 00:42:52,443 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 94 [2020-07-21 00:42:52,616 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 64 [2020-07-21 00:42:53,115 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 98 [2020-07-21 00:43:00,047 WARN L193 SmtUtils]: Spent 6.93 s on a formula simplification. DAG size of input: 704 DAG size of output: 284 [2020-07-21 00:43:07,402 WARN L193 SmtUtils]: Spent 7.35 s on a formula simplification. DAG size of input: 725 DAG size of output: 285 [2020-07-21 00:43:13,855 WARN L193 SmtUtils]: Spent 6.45 s on a formula simplification. DAG size of input: 690 DAG size of output: 281 [2020-07-21 00:43:14,727 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 114 [2020-07-21 00:43:14,890 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:43:22,198 WARN L193 SmtUtils]: Spent 7.30 s on a formula simplification. DAG size of input: 725 DAG size of output: 285 [2020-07-21 00:43:29,559 WARN L193 SmtUtils]: Spent 7.36 s on a formula simplification. DAG size of input: 725 DAG size of output: 285 [2020-07-21 00:43:30,013 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 94 [2020-07-21 00:43:32,784 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 541 DAG size of output: 194 [2020-07-21 00:43:39,450 WARN L193 SmtUtils]: Spent 6.66 s on a formula simplification. DAG size of input: 694 DAG size of output: 285 [2020-07-21 00:43:42,259 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 541 DAG size of output: 194 [2020-07-21 00:43:42,422 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:43:42,609 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 64 [2020-07-21 00:43:49,989 WARN L193 SmtUtils]: Spent 7.38 s on a formula simplification. DAG size of input: 725 DAG size of output: 285 [2020-07-21 00:43:56,930 WARN L193 SmtUtils]: Spent 6.94 s on a formula simplification. DAG size of input: 695 DAG size of output: 284 [2020-07-21 00:43:57,387 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 94 [2020-07-21 00:43:57,550 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:43:57,726 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 64 [2020-07-21 00:44:04,469 WARN L193 SmtUtils]: Spent 6.74 s on a formula simplification. DAG size of input: 694 DAG size of output: 285 [2020-07-21 00:44:11,900 WARN L193 SmtUtils]: Spent 7.43 s on a formula simplification. DAG size of input: 725 DAG size of output: 285 [2020-07-21 00:44:12,357 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 94 [2020-07-21 00:44:19,694 WARN L193 SmtUtils]: Spent 7.33 s on a formula simplification. DAG size of input: 716 DAG size of output: 285 [2020-07-21 00:44:20,591 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 114 [2020-07-21 00:44:27,515 WARN L193 SmtUtils]: Spent 6.92 s on a formula simplification. DAG size of input: 694 DAG size of output: 286 [2020-07-21 00:44:27,970 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 94 [2020-07-21 00:44:35,550 WARN L193 SmtUtils]: Spent 7.58 s on a formula simplification. DAG size of input: 725 DAG size of output: 285 [2020-07-21 00:44:35,713 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:44:42,592 WARN L193 SmtUtils]: Spent 6.88 s on a formula simplification. DAG size of input: 699 DAG size of output: 280 [2020-07-21 00:44:49,121 WARN L193 SmtUtils]: Spent 6.52 s on a formula simplification. DAG size of input: 695 DAG size of output: 285 [2020-07-21 00:44:49,305 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 63 [2020-07-21 00:44:49,745 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 94 [2020-07-21 00:44:50,404 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 105 [2020-07-21 00:44:50,567 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:44:57,517 WARN L193 SmtUtils]: Spent 6.95 s on a formula simplification. DAG size of input: 725 DAG size of output: 285 [2020-07-21 00:45:04,356 WARN L193 SmtUtils]: Spent 6.83 s on a formula simplification. DAG size of input: 716 DAG size of output: 285 [2020-07-21 00:45:10,791 WARN L193 SmtUtils]: Spent 6.43 s on a formula simplification. DAG size of input: 694 DAG size of output: 286 [2020-07-21 00:45:10,959 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 00:45:17,267 WARN L193 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 695 DAG size of output: 285 [2020-07-21 00:45:23,870 WARN L193 SmtUtils]: Spent 6.60 s on a formula simplification. DAG size of input: 725 DAG size of output: 285