/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --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 [2020-07-20 13:08:46,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:08:46,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:08:46,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:08:46,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:08:46,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:08:46,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:08:46,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:08:46,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:08:46,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:08:46,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:08:46,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:08:46,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:08:46,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:08:46,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:08:46,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:08:46,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:08:46,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:08:46,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:08:46,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:08:46,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:08:46,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:08:46,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:08:46,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:08:46,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:08:46,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:08:46,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:08:46,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:08:46,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 13:08:46,603 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:08:46,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:08:46,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:08:46,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:08:46,604 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:08:46,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:08:46,605 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:08:46,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:08:46,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:08:46,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:08:46,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:08:46,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:08:46,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:08:46,606 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:08:46,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:08:46,607 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:08:46,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:08:46,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:08:46,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:08:46,607 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:08:46,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:08:46,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:08:46,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:08:46,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:08:46,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:08:46,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:08:46,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:46,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:08:46,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:08:46,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:08:46,900 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:08:46,912 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:08:46,916 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:08:46,917 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:08:46,918 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:08:46,918 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-20 13:08:46,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2bee2a96/b48d6fa85a3d447da5cd66f9ea2c9a19/FLAGf141455f8 [2020-07-20 13:08:47,390 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:08:47,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-20 13:08:47,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2bee2a96/b48d6fa85a3d447da5cd66f9ea2c9a19/FLAGf141455f8 [2020-07-20 13:08:47,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2bee2a96/b48d6fa85a3d447da5cd66f9ea2c9a19 [2020-07-20 13:08:47,822 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:08:47,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:08:47,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:08:47,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:08:47,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:08:47,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:08:47" (1/1) ... [2020-07-20 13:08:47,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd08649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:47, skipping insertion in model container [2020-07-20 13:08:47,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:08:47" (1/1) ... [2020-07-20 13:08:47,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:08:47,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:08:48,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:08:48,098 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:08:48,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:08:48,133 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:08:48,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:48 WrapperNode [2020-07-20 13:08:48,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:08:48,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:08:48,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:08:48,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:08:48,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:48" (1/1) ... [2020-07-20 13:08:48,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:48" (1/1) ... [2020-07-20 13:08:48,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:48" (1/1) ... [2020-07-20 13:08:48,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:48" (1/1) ... [2020-07-20 13:08:48,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:48" (1/1) ... [2020-07-20 13:08:48,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:48" (1/1) ... [2020-07-20 13:08:48,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:48" (1/1) ... [2020-07-20 13:08:48,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:08:48,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:08:48,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:08:48,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:08:48,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:08:48,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:08:48,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:08:48,313 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-20 13:08:48,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:08:48,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:08:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:08:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-20 13:08:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:08:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:08:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:08:48,469 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:08:48,470 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:08:48,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:08:48 BoogieIcfgContainer [2020-07-20 13:08:48,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:08:48,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:08:48,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:08:48,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:08:48,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:08:47" (1/3) ... [2020-07-20 13:08:48,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e70307c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:08:48, skipping insertion in model container [2020-07-20 13:08:48,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:48" (2/3) ... [2020-07-20 13:08:48,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e70307c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:08:48, skipping insertion in model container [2020-07-20 13:08:48,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:08:48" (3/3) ... [2020-07-20 13:08:48,482 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci02.c [2020-07-20 13:08:48,492 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:08:48,498 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:08:48,512 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:08:48,535 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:08:48,535 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:08:48,536 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:08:48,536 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:08:48,536 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:08:48,536 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:08:48,536 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:08:48,537 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:08:48,553 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-20 13:08:48,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 13:08:48,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:48,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:08:48,560 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:48,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:48,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2020-07-20 13:08:48,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:48,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898711796] [2020-07-20 13:08:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:48,639 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:08:48,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:48,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:08:48,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:08:48,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:08:48,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898711796] [2020-07-20 13:08:48,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:08:48,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:08:48,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331928432] [2020-07-20 13:08:48,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:08:48,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:48,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:08:48,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:08:48,783 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-20 13:08:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:48,904 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-07-20 13:08:48,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:08:48,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 13:08:48,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:48,923 INFO L225 Difference]: With dead ends: 33 [2020-07-20 13:08:48,924 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 13:08:48,927 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 [2020-07-20 13:08:48,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 13:08:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 13:08:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 13:08:48,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 13:08:48,974 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-20 13:08:48,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:48,975 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 13:08:48,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:08:48,975 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 13:08:48,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 13:08:48,977 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:48,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:08:49,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:49,193 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:49,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:49,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2020-07-20 13:08:49,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:49,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721318168] [2020-07-20 13:08:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:49,219 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:08:49,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:49,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:08:49,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:08:49,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:08:49,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721318168] [2020-07-20 13:08:49,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:08:49,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:08:49,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717038507] [2020-07-20 13:08:49,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:08:49,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:49,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:08:49,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:08:49,263 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-20 13:08:49,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:49,330 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-20 13:08:49,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:08:49,331 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 13:08:49,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:49,333 INFO L225 Difference]: With dead ends: 27 [2020-07-20 13:08:49,333 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 13:08:49,334 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 [2020-07-20 13:08:49,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 13:08:49,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-20 13:08:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 13:08:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 13:08:49,342 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-20 13:08:49,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:49,342 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 13:08:49,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:08:49,343 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 13:08:49,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 13:08:49,344 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:49,344 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] [2020-07-20 13:08:49,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:49,559 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:49,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:49,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2020-07-20 13:08:49,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:49,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766421237] [2020-07-20 13:08:49,563 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:49,593 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:08:49,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:49,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:08:49,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 13:08:49,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:08:49,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:49,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 13:08:49,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766421237] [2020-07-20 13:08:49,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:08:49,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 13:08:49,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584384846] [2020-07-20 13:08:49,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:08:49,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:49,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:08:49,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:08:49,927 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-20 13:08:50,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:50,031 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-20 13:08:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:08:50,032 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 13:08:50,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:50,034 INFO L225 Difference]: With dead ends: 32 [2020-07-20 13:08:50,034 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 13:08:50,035 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 [2020-07-20 13:08:50,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 13:08:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 13:08:50,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 13:08:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 13:08:50,044 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-20 13:08:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:50,045 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 13:08:50,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:08:50,045 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 13:08:50,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:08:50,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:50,047 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] [2020-07-20 13:08:50,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:50,249 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:50,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:50,251 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2020-07-20 13:08:50,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:50,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187919241] [2020-07-20 13:08:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:50,280 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:08:50,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:50,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:08:50,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 13:08:50,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:08:50,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 13:08:50,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187919241] [2020-07-20 13:08:50,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:08:50,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 13:08:50,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337779067] [2020-07-20 13:08:50,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:08:50,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:50,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:08:50,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:08:50,483 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-20 13:08:50,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:50,547 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-20 13:08:50,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:08:50,548 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 13:08:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:50,550 INFO L225 Difference]: With dead ends: 37 [2020-07-20 13:08:50,550 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 13:08:50,551 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 [2020-07-20 13:08:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 13:08:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-20 13:08:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 13:08:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 13:08:50,560 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-20 13:08:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:50,561 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 13:08:50,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:08:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 13:08:50,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 13:08:50,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:50,563 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] [2020-07-20 13:08:50,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:50,766 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:50,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:50,767 INFO L82 PathProgramCache]: Analyzing trace with hash 246499846, now seen corresponding path program 2 times [2020-07-20 13:08:50,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:50,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499061389] [2020-07-20 13:08:50,768 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:50,803 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:08:50,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:50,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:08:50,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:08:50,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:08:51,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:51,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 13:08:51,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499061389] [2020-07-20 13:08:51,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:08:51,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 13:08:51,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569200973] [2020-07-20 13:08:51,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:08:51,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:51,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:08:51,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:08:51,205 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-20 13:08:51,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:51,341 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-20 13:08:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:08:51,344 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 13:08:51,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:51,346 INFO L225 Difference]: With dead ends: 42 [2020-07-20 13:08:51,346 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 13:08:51,347 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 [2020-07-20 13:08:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 13:08:51,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-20 13:08:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 13:08:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 13:08:51,359 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-20 13:08:51,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:51,359 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 13:08:51,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:08:51,360 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 13:08:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 13:08:51,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:51,362 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] [2020-07-20 13:08:51,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:51,565 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:51,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:51,566 INFO L82 PathProgramCache]: Analyzing trace with hash 380905728, now seen corresponding path program 2 times [2020-07-20 13:08:51,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:51,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347819082] [2020-07-20 13:08:51,567 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:51,603 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:08:51,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:51,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:08:51,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-20 13:08:51,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:08:51,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:51,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 13:08:51,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347819082] [2020-07-20 13:08:51,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:08:51,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 13:08:51,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563681188] [2020-07-20 13:08:51,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:08:51,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:51,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:08:51,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:08:51,938 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-20 13:08:52,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:52,069 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-20 13:08:52,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:08:52,069 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 13:08:52,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:52,072 INFO L225 Difference]: With dead ends: 47 [2020-07-20 13:08:52,072 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 13:08:52,073 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 [2020-07-20 13:08:52,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 13:08:52,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-20 13:08:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 13:08:52,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 13:08:52,083 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-20 13:08:52,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:52,084 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 13:08:52,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:08:52,084 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 13:08:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 13:08:52,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:52,087 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] [2020-07-20 13:08:52,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:52,291 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:52,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:52,291 INFO L82 PathProgramCache]: Analyzing trace with hash 2029845474, now seen corresponding path program 3 times [2020-07-20 13:08:52,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:52,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21047228] [2020-07-20 13:08:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:52,339 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:08:52,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:52,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:08:52,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 13:08:52,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:08:52,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:52,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:52,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:52,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:52,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 13:08:52,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21047228] [2020-07-20 13:08:52,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:08:52,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 13:08:52,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658075367] [2020-07-20 13:08:52,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:08:52,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:52,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:08:52,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:08:52,933 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-20 13:08:53,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:53,092 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-20 13:08:53,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:08:53,093 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-20 13:08:53,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:53,095 INFO L225 Difference]: With dead ends: 52 [2020-07-20 13:08:53,095 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 13:08:53,099 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 [2020-07-20 13:08:53,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 13:08:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-20 13:08:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 13:08:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 13:08:53,124 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-20 13:08:53,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:53,125 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 13:08:53,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:08:53,126 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 13:08:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 13:08:53,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:53,135 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] [2020-07-20 13:08:53,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:53,349 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:53,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:53,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1541039141, now seen corresponding path program 3 times [2020-07-20 13:08:53,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:53,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891804159] [2020-07-20 13:08:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:53,399 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:08:53,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:53,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:08:53,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-07-20 13:08:53,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:08:53,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:53,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:53,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:53,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 142 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-20 13:08:54,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891804159] [2020-07-20 13:08:54,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:08:54,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 13:08:54,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270562978] [2020-07-20 13:08:54,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:08:54,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:54,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:08:54,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:08:54,022 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-20 13:08:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:54,197 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-20 13:08:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:08:54,198 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-20 13:08:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:54,200 INFO L225 Difference]: With dead ends: 57 [2020-07-20 13:08:54,200 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 13:08:54,201 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 [2020-07-20 13:08:54,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 13:08:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-20 13:08:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 13:08:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 13:08:54,213 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 82 [2020-07-20 13:08:54,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:54,214 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 13:08:54,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:08:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 13:08:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-20 13:08:54,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:54,217 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] [2020-07-20 13:08:54,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:54,433 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:54,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:54,434 INFO L82 PathProgramCache]: Analyzing trace with hash 332479940, now seen corresponding path program 4 times [2020-07-20 13:08:54,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:54,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932592268] [2020-07-20 13:08:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:54,536 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:08:54,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:54,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:08:54,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 507 refuted. 0 times theorem prover too weak. 1481 trivial. 0 not checked. [2020-07-20 13:08:54,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:08:55,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:55,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:55,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:55,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 529 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2020-07-20 13:08:55,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932592268] [2020-07-20 13:08:55,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:08:55,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 13:08:55,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125131262] [2020-07-20 13:08:55,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:08:55,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:55,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:08:55,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:08:55,782 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-20 13:08:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:55,962 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-20 13:08:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:08:55,962 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 195 [2020-07-20 13:08:55,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:55,965 INFO L225 Difference]: With dead ends: 62 [2020-07-20 13:08:55,965 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 13:08:55,968 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 [2020-07-20 13:08:55,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 13:08:55,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-20 13:08:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 13:08:55,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 13:08:55,981 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 195 [2020-07-20 13:08:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:55,981 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 13:08:55,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:08:55,982 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 13:08:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 13:08:55,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:55,988 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] [2020-07-20 13:08:56,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:56,202 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:56,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:56,202 INFO L82 PathProgramCache]: Analyzing trace with hash 2116311810, now seen corresponding path program 4 times [2020-07-20 13:08:56,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:56,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532615620] [2020-07-20 13:08:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:56,267 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:08:56,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:56,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:08:56,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 268 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-07-20 13:08:56,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:08:56,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:56,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:57,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:57,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:57,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:57,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:57,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:57,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 294 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-20 13:08:57,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532615620] [2020-07-20 13:08:57,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:08:57,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 13:08:57,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738407534] [2020-07-20 13:08:57,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:08:57,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:57,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:08:57,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:08:57,202 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-20 13:08:57,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:57,389 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-20 13:08:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:08:57,390 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 122 [2020-07-20 13:08:57,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:57,394 INFO L225 Difference]: With dead ends: 67 [2020-07-20 13:08:57,395 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 13:08:57,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 220 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:08:57,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 13:08:57,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-20 13:08:57,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 13:08:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 13:08:57,420 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 122 [2020-07-20 13:08:57,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:57,425 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 13:08:57,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:08:57,425 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 13:08:57,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-20 13:08:57,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:57,431 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] [2020-07-20 13:08:57,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:57,647 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:57,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:57,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1067745099, now seen corresponding path program 5 times [2020-07-20 13:08:57,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:57,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517521541] [2020-07-20 13:08:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:57,769 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:08:57,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:57,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:08:57,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-20 13:08:57,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:08:59,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:59,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:59,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:59,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:59,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:59,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:59,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:59,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:59,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-20 13:08:59,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517521541] [2020-07-20 13:08:59,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:08:59,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 13:08:59,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895330602] [2020-07-20 13:08:59,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:08:59,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:59,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:08:59,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:08:59,673 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-20 13:08:59,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:59,927 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-20 13:08:59,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:08:59,928 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-20 13:08:59,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:59,931 INFO L225 Difference]: With dead ends: 72 [2020-07-20 13:08:59,931 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 13:08:59,932 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 [2020-07-20 13:08:59,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 13:08:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-20 13:08:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 13:08:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 13:08:59,952 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-20 13:08:59,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:59,952 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 13:08:59,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:08:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 13:08:59,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-20 13:08:59,958 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:59,958 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] [2020-07-20 13:09:00,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:00,172 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:09:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:09:00,173 INFO L82 PathProgramCache]: Analyzing trace with hash -738141547, now seen corresponding path program 5 times [2020-07-20 13:09:00,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:09:00,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304079980] [2020-07-20 13:09:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:00,306 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:09:00,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:09:00,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:09:00,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:09:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-20 13:09:00,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:09:01,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:01,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:01,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:02,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:02,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:02,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:02,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:02,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-20 13:09:02,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304079980] [2020-07-20 13:09:02,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:09:02,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 13:09:02,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512883680] [2020-07-20 13:09:02,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:09:02,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:09:02,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:09:02,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:09:02,292 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-20 13:09:02,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:09:02,546 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-20 13:09:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:09:02,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 299 [2020-07-20 13:09:02,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:09:02,554 INFO L225 Difference]: With dead ends: 77 [2020-07-20 13:09:02,554 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 13:09:02,555 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 [2020-07-20 13:09:02,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 13:09:02,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-20 13:09:02,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 13:09:02,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 13:09:02,575 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-20 13:09:02,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:09:02,576 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 13:09:02,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:09:02,576 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 13:09:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 13:09:02,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:09:02,584 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:09:02,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:02,794 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:09:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:09:02,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1744921577, now seen corresponding path program 6 times [2020-07-20 13:09:02,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:09:02,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594752267] [2020-07-20 13:09:02,795 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:02,939 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:09:02,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:09:02,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:09:02,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:09:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6600 backedges. 256 proven. 1325 refuted. 0 times theorem prover too weak. 5019 trivial. 0 not checked. [2020-07-20 13:09:03,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:09:04,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:05,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:05,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:05,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:05,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:05,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:05,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:05,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6600 backedges. 256 proven. 1376 refuted. 0 times theorem prover too weak. 4968 trivial. 0 not checked. [2020-07-20 13:09:05,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594752267] [2020-07-20 13:09:05,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:09:05,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 13:09:05,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656045313] [2020-07-20 13:09:05,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 13:09:05,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:09:05,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 13:09:05,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 13:09:05,657 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-20 13:09:05,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:09:05,907 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-20 13:09:05,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:09:05,907 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 338 [2020-07-20 13:09:05,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:09:05,911 INFO L225 Difference]: With dead ends: 82 [2020-07-20 13:09:05,912 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 13:09:05,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 645 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 13:09:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 13:09:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-20 13:09:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 13:09:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-20 13:09:05,923 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 338 [2020-07-20 13:09:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:09:05,924 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-20 13:09:05,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 13:09:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-20 13:09:05,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2020-07-20 13:09:05,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:09:05,929 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 76, 44, 44, 44, 44, 44, 44, 44, 32, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:09:06,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:06,143 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:09:06,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:09:06,143 INFO L82 PathProgramCache]: Analyzing trace with hash -694257440, now seen corresponding path program 6 times [2020-07-20 13:09:06,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:09:06,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672547520] [2020-07-20 13:09:06,144 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:06,400 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:09:06,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:09:06,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:09:06,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:09:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 22298 backedges. 491 proven. 2713 refuted. 0 times theorem prover too weak. 19094 trivial. 0 not checked. [2020-07-20 13:09:06,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:09:08,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:08,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:09,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:09,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:09,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:09,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:10,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:10,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 22298 backedges. 491 proven. 2770 refuted. 0 times theorem prover too weak. 19037 trivial. 0 not checked. [2020-07-20 13:09:10,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672547520] [2020-07-20 13:09:10,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:09:10,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 13:09:10,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397097355] [2020-07-20 13:09:10,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 13:09:10,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:09:10,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 13:09:10,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 13:09:10,220 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-20 13:09:10,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:09:10,646 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-20 13:09:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:09:10,647 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 617 [2020-07-20 13:09:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:09:10,651 INFO L225 Difference]: With dead ends: 87 [2020-07-20 13:09:10,651 INFO L226 Difference]: Without dead ends: 83 [2020-07-20 13:09:10,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1240 GetRequests, 1202 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 13:09:10,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-20 13:09:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-20 13:09:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 13:09:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-20 13:09:10,664 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 617 [2020-07-20 13:09:10,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:09:10,667 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-20 13:09:10,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 13:09:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-20 13:09:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1184 [2020-07-20 13:09:10,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:09:10,685 INFO L422 BasicCegarLoop]: trace histogram [181, 181, 91, 90, 90, 90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:09:10,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:10,901 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:09:10,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:09:10,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1630389726, now seen corresponding path program 7 times [2020-07-20 13:09:10,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:09:10,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398504578] [2020-07-20 13:09:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:11,297 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:09:11,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:09:11,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 2152 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 13:09:11,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:09:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 85185 backedges. 1108 proven. 6068 refuted. 0 times theorem prover too weak. 78009 trivial. 0 not checked. [2020-07-20 13:09:12,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:09:15,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:16,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:17,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:17,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:17,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:18,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:18,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:18,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 85185 backedges. 1108 proven. 6138 refuted. 0 times theorem prover too weak. 77939 trivial. 0 not checked. [2020-07-20 13:09:18,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398504578] [2020-07-20 13:09:18,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:09:18,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-20 13:09:18,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3040794] [2020-07-20 13:09:18,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 13:09:18,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:09:18,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 13:09:18,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-20 13:09:18,892 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-20 13:09:19,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:09:19,345 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-20 13:09:19,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:09:19,345 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1183 [2020-07-20 13:09:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:09:19,351 INFO L225 Difference]: With dead ends: 92 [2020-07-20 13:09:19,351 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 13:09:19,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2374 GetRequests, 2331 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-20 13:09:19,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 13:09:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-20 13:09:19,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 13:09:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-20 13:09:19,364 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1183 [2020-07-20 13:09:19,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:09:19,366 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-20 13:09:19,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 13:09:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-20 13:09:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 913 [2020-07-20 13:09:19,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:09:19,375 INFO L422 BasicCegarLoop]: trace histogram [133, 133, 107, 66, 66, 66, 66, 66, 66, 66, 41, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:09:19,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:19,589 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:09:19,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:09:19,589 INFO L82 PathProgramCache]: Analyzing trace with hash 90638034, now seen corresponding path program 7 times [2020-07-20 13:09:19,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:09:19,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548547360] [2020-07-20 13:09:19,590 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:19,920 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:09:19,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:09:19,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1648 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 13:09:19,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:09:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 49363 backedges. 687 proven. 4876 refuted. 0 times theorem prover too weak. 43800 trivial. 0 not checked. [2020-07-20 13:09:20,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:09:23,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:23,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:24,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:24,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:24,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:24,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:25,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:25,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:25,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:25,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:25,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:25,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 49363 backedges. 687 proven. 4953 refuted. 0 times theorem prover too weak. 43723 trivial. 0 not checked. [2020-07-20 13:09:26,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548547360] [2020-07-20 13:09:26,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:09:26,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-20 13:09:26,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186613274] [2020-07-20 13:09:26,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:09:26,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:09:26,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:09:26,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:09:26,042 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 20 states. [2020-07-20 13:09:26,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:09:26,423 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-20 13:09:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:09:26,424 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 912 [2020-07-20 13:09:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:09:26,428 INFO L225 Difference]: With dead ends: 97 [2020-07-20 13:09:26,428 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 13:09:26,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1831 GetRequests, 1788 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-20 13:09:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 13:09:26,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-20 13:09:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 13:09:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-20 13:09:26,445 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 912 [2020-07-20 13:09:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:09:26,446 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-20 13:09:26,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:09:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-20 13:09:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1951 [2020-07-20 13:09:26,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:09:26,478 INFO L422 BasicCegarLoop]: trace histogram [299, 299, 150, 149, 149, 149, 149, 149, 149, 149, 149, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:09:26,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:26,692 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:09:26,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:09:26,693 INFO L82 PathProgramCache]: Analyzing trace with hash 595836749, now seen corresponding path program 8 times [2020-07-20 13:09:26,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:09:26,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243519445] [2020-07-20 13:09:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:27,371 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:09:27,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:09:27,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 3544 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 13:09:27,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:09:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 233334 backedges. 1911 proven. 11715 refuted. 0 times theorem prover too weak. 219708 trivial. 0 not checked. [2020-07-20 13:09:28,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:09:34,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:37,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:37,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:38,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:39,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:39,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:39,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:39,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:39,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:39,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:39,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 233334 backedges. 1911 proven. 11807 refuted. 0 times theorem prover too weak. 219616 trivial. 0 not checked. [2020-07-20 13:09:41,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243519445] [2020-07-20 13:09:41,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:09:41,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 13:09:41,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387487329] [2020-07-20 13:09:41,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:09:41,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:09:41,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:09:41,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:09:41,015 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 22 states. [2020-07-20 13:09:41,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:09:41,383 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-20 13:09:41,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:09:41,383 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1950 [2020-07-20 13:09:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:09:41,388 INFO L225 Difference]: With dead ends: 102 [2020-07-20 13:09:41,388 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 13:09:41,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3909 GetRequests, 3861 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 13:09:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 13:09:41,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-20 13:09:41,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 13:09:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-20 13:09:41,407 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1950 [2020-07-20 13:09:41,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:09:41,408 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-20 13:09:41,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:09:41,409 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-20 13:09:41,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1690 [2020-07-20 13:09:41,431 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:09:41,432 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] [2020-07-20 13:09:41,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:41,644 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:09:41,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:09:41,646 INFO L82 PathProgramCache]: Analyzing trace with hash -263746810, now seen corresponding path program 8 times [2020-07-20 13:09:41,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:09:41,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220355940] [2020-07-20 13:09:41,647 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:42,241 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:09:42,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:09:42,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 3051 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 13:09:42,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:09:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1790 proven. 10673 refuted. 0 times theorem prover too weak. 158987 trivial. 0 not checked. [2020-07-20 13:09:43,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:09:48,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:48,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:51,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:51,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:52,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:53,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:53,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:53,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:53,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:53,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:53,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:09:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1800 proven. 10755 refuted. 0 times theorem prover too weak. 158895 trivial. 0 not checked. [2020-07-20 13:09:54,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220355940] [2020-07-20 13:09:54,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:09:54,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 13:09:54,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702440997] [2020-07-20 13:09:54,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:09:54,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:09:54,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:09:54,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:09:54,825 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 22 states. [2020-07-20 13:09:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:09:55,297 INFO L93 Difference]: Finished difference Result 245 states and 2197 transitions. [2020-07-20 13:09:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:09:55,298 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1689 [2020-07-20 13:09:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:09:55,304 INFO L225 Difference]: With dead ends: 245 [2020-07-20 13:09:55,304 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 13:09:55,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3386 GetRequests, 3338 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 13:09:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 13:09:55,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-20 13:09:55,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 13:09:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 94 transitions. [2020-07-20 13:09:55,331 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 94 transitions. Word has length 1689 [2020-07-20 13:09:55,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:09:55,332 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 94 transitions. [2020-07-20 13:09:55,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:09:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 94 transitions. [2020-07-20 13:09:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2020-07-20 13:09:55,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:09:55,344 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] [2020-07-20 13:09:55,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:55,558 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:09:55,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:09:55,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1302353203, now seen corresponding path program 9 times [2020-07-20 13:09:55,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:09:55,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348436730] [2020-07-20 13:09:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:09:56,021 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:09:56,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:09:56,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1872 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 13:09:56,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:09:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 1347 proven. 6076 refuted. 0 times theorem prover too weak. 56358 trivial. 0 not checked. [2020-07-20 13:09:56,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:10:00,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:01,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:02,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:03,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:03,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:03,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:03,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:03,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:03,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:03,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:03,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:04,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 1355 proven. 6160 refuted. 0 times theorem prover too weak. 56266 trivial. 0 not checked. [2020-07-20 13:10:04,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348436730] [2020-07-20 13:10:04,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:10:04,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 13:10:04,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727131170] [2020-07-20 13:10:04,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:10:04,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:10:04,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:10:04,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:10:04,471 INFO L87 Difference]: Start difference. First operand 69 states and 94 transitions. Second operand 22 states. [2020-07-20 13:10:04,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:10:04,851 INFO L93 Difference]: Finished difference Result 107 states and 145 transitions. [2020-07-20 13:10:04,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:10:04,852 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1035 [2020-07-20 13:10:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:10:04,856 INFO L225 Difference]: With dead ends: 107 [2020-07-20 13:10:04,856 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 13:10:04,859 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 [2020-07-20 13:10:04,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 13:10:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-07-20 13:10:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 13:10:04,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2020-07-20 13:10:04,870 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 1035 [2020-07-20 13:10:04,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:10:04,871 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2020-07-20 13:10:04,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:10:04,871 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2020-07-20 13:10:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2020-07-20 13:10:04,879 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:10:04,879 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] [2020-07-20 13:10:05,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:10:05,095 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:10:05,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:10:05,096 INFO L82 PathProgramCache]: Analyzing trace with hash -260964346, now seen corresponding path program 10 times [2020-07-20 13:10:05,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:10:05,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628415268] [2020-07-20 13:10:05,097 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:10:05,543 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:10:05,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:10:05,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 13:10:05,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:10:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1287 proven. 4349 refuted. 0 times theorem prover too weak. 35140 trivial. 0 not checked. [2020-07-20 13:10:05,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:10:09,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:10,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:10,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:11,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:11,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:12,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:12,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:12,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:12,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:12,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:12,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:12,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1293 proven. 4443 refuted. 0 times theorem prover too weak. 35040 trivial. 0 not checked. [2020-07-20 13:10:12,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628415268] [2020-07-20 13:10:12,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:10:12,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 13:10:12,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543577246] [2020-07-20 13:10:12,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:10:12,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:10:12,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:10:12,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:10:12,942 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand 22 states. [2020-07-20 13:10:13,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:10:13,262 INFO L93 Difference]: Finished difference Result 117 states and 160 transitions. [2020-07-20 13:10:13,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:10:13,262 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 830 [2020-07-20 13:10:13,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:10:13,265 INFO L225 Difference]: With dead ends: 117 [2020-07-20 13:10:13,265 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 13:10:13,267 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 [2020-07-20 13:10:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 13:10:13,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2020-07-20 13:10:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-20 13:10:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2020-07-20 13:10:13,277 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 830 [2020-07-20 13:10:13,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:10:13,277 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2020-07-20 13:10:13,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:10:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2020-07-20 13:10:13,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2020-07-20 13:10:13,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:10:13,285 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] [2020-07-20 13:10:13,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:10:13,499 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:10:13,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:10:13,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 11 times [2020-07-20 13:10:13,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:10:13,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222046711] [2020-07-20 13:10:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:10:13,987 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:10:13,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:10:14,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 439 conjunts are in the unsatisfiable core [2020-07-20 13:10:14,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:10:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-20 13:10:14,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:10:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-20 13:10:26,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222046711] [2020-07-20 13:10:26,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:10:26,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-20 13:10:26,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069734741] [2020-07-20 13:10:26,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 13:10:26,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:10:26,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 13:10:26,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 13:10:26,840 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 36 states. [2020-07-20 13:10:27,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:10:27,738 INFO L93 Difference]: Finished difference Result 167 states and 272 transitions. [2020-07-20 13:10:27,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 13:10:27,739 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749 [2020-07-20 13:10:27,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:10:27,745 INFO L225 Difference]: With dead ends: 167 [2020-07-20 13:10:27,746 INFO L226 Difference]: Without dead ends: 160 [2020-07-20 13:10:27,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1499 GetRequests, 1454 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=1313, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 13:10:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-20 13:10:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2020-07-20 13:10:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-20 13:10:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 221 transitions. [2020-07-20 13:10:27,775 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 221 transitions. Word has length 749 [2020-07-20 13:10:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:10:27,775 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 221 transitions. [2020-07-20 13:10:27,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 13:10:27,776 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 221 transitions. [2020-07-20 13:10:27,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2020-07-20 13:10:27,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:10:27,787 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 88, 60, 60, 60, 60, 60, 60, 60, 33, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:10:28,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:10:28,003 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:10:28,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:10:28,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2067144568, now seen corresponding path program 12 times [2020-07-20 13:10:28,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:10:28,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235683410] [2020-07-20 13:10:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:10:28,505 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:10:28,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:10:28,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 13:10:28,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:10:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 39948 backedges. 1490 proven. 3070 refuted. 0 times theorem prover too weak. 35388 trivial. 0 not checked. [2020-07-20 13:10:28,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:10:31,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:31,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:32,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:32,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:33,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:33,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:33,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:33,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:33,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:33,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:33,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 39948 backedges. 1494 proven. 3119 refuted. 0 times theorem prover too weak. 35335 trivial. 0 not checked. [2020-07-20 13:10:34,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235683410] [2020-07-20 13:10:34,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:10:34,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 13:10:34,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192250077] [2020-07-20 13:10:34,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:10:34,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:10:34,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:10:34,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:10:34,536 INFO L87 Difference]: Start difference. First operand 131 states and 221 transitions. Second operand 20 states. [2020-07-20 13:10:34,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:10:34,821 INFO L93 Difference]: Finished difference Result 183 states and 305 transitions. [2020-07-20 13:10:34,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:10:34,824 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 821 [2020-07-20 13:10:34,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:10:34,827 INFO L225 Difference]: With dead ends: 183 [2020-07-20 13:10:34,828 INFO L226 Difference]: Without dead ends: 166 [2020-07-20 13:10:34,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1608 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:10:34,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-20 13:10:34,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 157. [2020-07-20 13:10:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-20 13:10:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 271 transitions. [2020-07-20 13:10:34,858 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 271 transitions. Word has length 821 [2020-07-20 13:10:34,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:10:34,859 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 271 transitions. [2020-07-20 13:10:34,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:10:34,859 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 271 transitions. [2020-07-20 13:10:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 848 [2020-07-20 13:10:34,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:10:34,874 INFO L422 BasicCegarLoop]: trace histogram [125, 125, 90, 62, 62, 62, 62, 62, 62, 62, 35, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:10:35,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:10:35,087 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:10:35,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:10:35,088 INFO L82 PathProgramCache]: Analyzing trace with hash -788512462, now seen corresponding path program 13 times [2020-07-20 13:10:35,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:10:35,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903569133] [2020-07-20 13:10:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:10:35,581 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:10:35,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:10:35,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 1535 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 13:10:35,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:10:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 42569 backedges. 1644 proven. 3477 refuted. 0 times theorem prover too weak. 37448 trivial. 0 not checked. [2020-07-20 13:10:35,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:10:39,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:39,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:40,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:40,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:41,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:41,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:41,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:41,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:41,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:41,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:41,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:41,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 42569 backedges. 1658 proven. 3542 refuted. 0 times theorem prover too weak. 37369 trivial. 0 not checked. [2020-07-20 13:10:42,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903569133] [2020-07-20 13:10:42,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:10:42,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-20 13:10:42,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040774926] [2020-07-20 13:10:42,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:10:42,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:10:42,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:10:42,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:10:42,093 INFO L87 Difference]: Start difference. First operand 157 states and 271 transitions. Second operand 20 states. [2020-07-20 13:10:42,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:10:42,407 INFO L93 Difference]: Finished difference Result 253 states and 434 transitions. [2020-07-20 13:10:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:10:42,408 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 847 [2020-07-20 13:10:42,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:10:42,416 INFO L225 Difference]: With dead ends: 253 [2020-07-20 13:10:42,416 INFO L226 Difference]: Without dead ends: 236 [2020-07-20 13:10:42,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1701 GetRequests, 1658 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-20 13:10:42,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-20 13:10:42,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 152. [2020-07-20 13:10:42,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-20 13:10:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 261 transitions. [2020-07-20 13:10:42,453 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 261 transitions. Word has length 847 [2020-07-20 13:10:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:10:42,454 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 261 transitions. [2020-07-20 13:10:42,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:10:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 261 transitions. [2020-07-20 13:10:42,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2020-07-20 13:10:42,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:10:42,468 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] [2020-07-20 13:10:42,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:10:42,682 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:10:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:10:42,683 INFO L82 PathProgramCache]: Analyzing trace with hash 750891876, now seen corresponding path program 14 times [2020-07-20 13:10:42,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:10:42,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212677671] [2020-07-20 13:10:42,684 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 [2020-07-20 13:10:43,226 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:10:43,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:10:43,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1446 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 13:10:43,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:10:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 37584 backedges. 949 proven. 4061 refuted. 0 times theorem prover too weak. 32574 trivial. 0 not checked. [2020-07-20 13:10:43,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:10:47,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:48,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:48,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:48,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:48,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:49,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:49,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:49,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:49,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:49,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:49,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:49,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:49,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 37584 backedges. 952 proven. 4128 refuted. 0 times theorem prover too weak. 32504 trivial. 0 not checked. [2020-07-20 13:10:50,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212677671] [2020-07-20 13:10:50,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:10:50,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 13:10:50,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615835283] [2020-07-20 13:10:50,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:10:50,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:10:50,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:10:50,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:10:50,060 INFO L87 Difference]: Start difference. First operand 152 states and 261 transitions. Second operand 22 states. [2020-07-20 13:10:50,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:10:50,567 INFO L93 Difference]: Finished difference Result 310 states and 557 transitions. [2020-07-20 13:10:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:10:50,568 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 797 [2020-07-20 13:10:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:10:50,572 INFO L225 Difference]: With dead ends: 310 [2020-07-20 13:10:50,572 INFO L226 Difference]: Without dead ends: 149 [2020-07-20 13:10:50,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1601 GetRequests, 1556 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 13:10:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-07-20 13:10:50,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-07-20 13:10:50,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-20 13:10:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 239 transitions. [2020-07-20 13:10:50,604 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 239 transitions. Word has length 797 [2020-07-20 13:10:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:10:50,605 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 239 transitions. [2020-07-20 13:10:50,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:10:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 239 transitions. [2020-07-20 13:10:50,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2020-07-20 13:10:50,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:10:50,618 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] [2020-07-20 13:10:50,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:10:50,832 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:10:50,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:10:50,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1756284450, now seen corresponding path program 15 times [2020-07-20 13:10:50,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:10:50,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712113458] [2020-07-20 13:10:50,833 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 [2020-07-20 13:10:51,389 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:10:51,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:10:51,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1446 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 13:10:51,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:10:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 37584 backedges. 1307 proven. 2510 refuted. 0 times theorem prover too weak. 33767 trivial. 0 not checked. [2020-07-20 13:10:51,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:10:54,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:55,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:55,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:55,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:55,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:55,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:55,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:55,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:55,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:55,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:10:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 37584 backedges. 1314 proven. 2544 refuted. 0 times theorem prover too weak. 33726 trivial. 0 not checked. [2020-07-20 13:10:56,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712113458] [2020-07-20 13:10:56,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:10:56,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-20 13:10:56,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335246830] [2020-07-20 13:10:56,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:10:56,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:10:56,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:10:56,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:10:56,245 INFO L87 Difference]: Start difference. First operand 149 states and 239 transitions. Second operand 18 states. [2020-07-20 13:10:56,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:10:56,500 INFO L93 Difference]: Finished difference Result 204 states and 331 transitions. [2020-07-20 13:10:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:10:56,501 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 797 [2020-07-20 13:10:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:10:56,505 INFO L225 Difference]: With dead ends: 204 [2020-07-20 13:10:56,505 INFO L226 Difference]: Without dead ends: 187 [2020-07-20 13:10:56,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1599 GetRequests, 1564 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:10:56,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-20 13:10:56,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 152. [2020-07-20 13:10:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-20 13:10:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 245 transitions. [2020-07-20 13:10:56,533 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 245 transitions. Word has length 797 [2020-07-20 13:10:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:10:56,534 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 245 transitions. [2020-07-20 13:10:56,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:10:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 245 transitions. [2020-07-20 13:10:56,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2020-07-20 13:10:56,546 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:10:56,546 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] [2020-07-20 13:10:56,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:10:56,761 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:10:56,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:10:56,761 INFO L82 PathProgramCache]: Analyzing trace with hash 655886067, now seen corresponding path program 16 times [2020-07-20 13:10:56,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:10:56,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122621061] [2020-07-20 13:10:56,762 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 [2020-07-20 13:10:57,376 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:10:57,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:10:57,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1424 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 13:10:57,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:10:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 952 proven. 3398 refuted. 0 times theorem prover too weak. 32082 trivial. 0 not checked. [2020-07-20 13:10:57,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:00,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:01,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:02,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:02,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:02,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:02,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:02,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:02,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:02,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 962 proven. 3441 refuted. 0 times theorem prover too weak. 32029 trivial. 0 not checked. [2020-07-20 13:11:03,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122621061] [2020-07-20 13:11:03,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:11:03,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 13:11:03,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891337352] [2020-07-20 13:11:03,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:11:03,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:03,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:11:03,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:11:03,241 INFO L87 Difference]: Start difference. First operand 152 states and 245 transitions. Second operand 20 states. [2020-07-20 13:11:03,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:03,542 INFO L93 Difference]: Finished difference Result 206 states and 336 transitions. [2020-07-20 13:11:03,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:11:03,543 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 785 [2020-07-20 13:11:03,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:03,547 INFO L225 Difference]: With dead ends: 206 [2020-07-20 13:11:03,548 INFO L226 Difference]: Without dead ends: 179 [2020-07-20 13:11:03,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1576 GetRequests, 1536 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:11:03,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-07-20 13:11:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 152. [2020-07-20 13:11:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-20 13:11:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 242 transitions. [2020-07-20 13:11:03,574 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 242 transitions. Word has length 785 [2020-07-20 13:11:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:03,574 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 242 transitions. [2020-07-20 13:11:03,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:11:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 242 transitions. [2020-07-20 13:11:03,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2020-07-20 13:11:03,586 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:03,586 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 88, 60, 60, 60, 60, 60, 60, 60, 33, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:11:03,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:03,800 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:03,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:03,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1716110660, now seen corresponding path program 17 times [2020-07-20 13:11:03,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:03,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745749904] [2020-07-20 13:11:03,801 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 [2020-07-20 13:11:04,382 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:11:04,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:04,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 13:11:04,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 39948 backedges. 1126 proven. 3434 refuted. 0 times theorem prover too weak. 35388 trivial. 0 not checked. [2020-07-20 13:11:04,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:07,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:08,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:09,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:09,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:09,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:09,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:09,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:10,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:10,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 39948 backedges. 1134 proven. 3479 refuted. 0 times theorem prover too weak. 35335 trivial. 0 not checked. [2020-07-20 13:11:10,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745749904] [2020-07-20 13:11:10,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:11:10,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 13:11:10,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230707977] [2020-07-20 13:11:10,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:11:10,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:10,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:11:10,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:11:10,523 INFO L87 Difference]: Start difference. First operand 152 states and 242 transitions. Second operand 20 states. [2020-07-20 13:11:10,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:10,809 INFO L93 Difference]: Finished difference Result 219 states and 346 transitions. [2020-07-20 13:11:10,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:11:10,810 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 821 [2020-07-20 13:11:10,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:10,815 INFO L225 Difference]: With dead ends: 219 [2020-07-20 13:11:10,815 INFO L226 Difference]: Without dead ends: 197 [2020-07-20 13:11:10,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1608 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:11:10,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-07-20 13:11:10,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 149. [2020-07-20 13:11:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-20 13:11:10,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 239 transitions. [2020-07-20 13:11:10,842 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 239 transitions. Word has length 821 [2020-07-20 13:11:10,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:10,842 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 239 transitions. [2020-07-20 13:11:10,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:11:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 239 transitions. [2020-07-20 13:11:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-07-20 13:11:10,855 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:10,856 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] [2020-07-20 13:11:11,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:11,069 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:11,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1822250204, now seen corresponding path program 18 times [2020-07-20 13:11:11,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:11,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635737831] [2020-07-20 13:11:11,071 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 [2020-07-20 13:11:11,667 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:11:11,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:11,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 1534 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 13:11:11,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 42392 backedges. 1076 proven. 4254 refuted. 0 times theorem prover too weak. 37062 trivial. 0 not checked. [2020-07-20 13:11:12,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:16,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:17,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:17,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:18,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:18,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:18,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:18,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:18,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:19,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:19,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:19,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:19,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:19,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42392 backedges. 1077 proven. 4323 refuted. 0 times theorem prover too weak. 36992 trivial. 0 not checked. [2020-07-20 13:11:19,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635737831] [2020-07-20 13:11:19,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:11:19,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 13:11:19,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587854924] [2020-07-20 13:11:19,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:11:19,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:19,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:11:19,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:11:19,670 INFO L87 Difference]: Start difference. First operand 149 states and 239 transitions. Second operand 22 states. [2020-07-20 13:11:20,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:20,026 INFO L93 Difference]: Finished difference Result 188 states and 294 transitions. [2020-07-20 13:11:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:11:20,028 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 845 [2020-07-20 13:11:20,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:20,032 INFO L225 Difference]: With dead ends: 188 [2020-07-20 13:11:20,032 INFO L226 Difference]: Without dead ends: 158 [2020-07-20 13:11:20,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1697 GetRequests, 1652 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 13:11:20,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-20 13:11:20,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2020-07-20 13:11:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-20 13:11:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 236 transitions. [2020-07-20 13:11:20,055 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 236 transitions. Word has length 845 [2020-07-20 13:11:20,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:20,055 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 236 transitions. [2020-07-20 13:11:20,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:11:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 236 transitions. [2020-07-20 13:11:20,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-20 13:11:20,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:20,066 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] [2020-07-20 13:11:20,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:20,281 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:20,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1607399174, now seen corresponding path program 19 times [2020-07-20 13:11:20,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:20,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203778010] [2020-07-20 13:11:20,283 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 [2020-07-20 13:11:20,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:11:20,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:20,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 13:11:20,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1170 proven. 3680 refuted. 0 times theorem prover too weak. 30450 trivial. 0 not checked. [2020-07-20 13:11:21,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:24,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:24,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:26,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:26,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:26,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:27,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:27,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:27,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:27,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:27,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:27,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1169 proven. 3751 refuted. 0 times theorem prover too weak. 30380 trivial. 0 not checked. [2020-07-20 13:11:28,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203778010] [2020-07-20 13:11:28,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:11:28,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 13:11:28,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938329094] [2020-07-20 13:11:28,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:11:28,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:28,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:11:28,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:11:28,160 INFO L87 Difference]: Start difference. First operand 149 states and 236 transitions. Second operand 22 states. [2020-07-20 13:11:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:28,566 INFO L93 Difference]: Finished difference Result 204 states and 314 transitions. [2020-07-20 13:11:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:11:28,567 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 773 [2020-07-20 13:11:28,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:28,573 INFO L225 Difference]: With dead ends: 204 [2020-07-20 13:11:28,573 INFO L226 Difference]: Without dead ends: 182 [2020-07-20 13:11:28,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1508 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 13:11:28,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-20 13:11:28,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-07-20 13:11:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 13:11:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 213 transitions. [2020-07-20 13:11:28,597 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 213 transitions. Word has length 773 [2020-07-20 13:11:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:28,598 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 213 transitions. [2020-07-20 13:11:28,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:11:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 213 transitions. [2020-07-20 13:11:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2020-07-20 13:11:28,608 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:28,609 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] [2020-07-20 13:11:28,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:28,823 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:28,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:28,823 INFO L82 PathProgramCache]: Analyzing trace with hash 657681720, now seen corresponding path program 20 times [2020-07-20 13:11:28,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:28,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117541277] [2020-07-20 13:11:28,824 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 [2020-07-20 13:11:29,462 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:11:29,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 13:11:29,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 35477 backedges. 2095 proven. 2570 refuted. 0 times theorem prover too weak. 30812 trivial. 0 not checked. [2020-07-20 13:11:29,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:33,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:33,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:34,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:34,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:34,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:34,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:34,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:34,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:34,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:35,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:35,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 35477 backedges. 2107 proven. 2637 refuted. 0 times theorem prover too weak. 30733 trivial. 0 not checked. [2020-07-20 13:11:36,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117541277] [2020-07-20 13:11:36,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:11:36,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-20 13:11:36,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704627660] [2020-07-20 13:11:36,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:11:36,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:36,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:11:36,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:11:36,092 INFO L87 Difference]: Start difference. First operand 136 states and 213 transitions. Second operand 20 states. [2020-07-20 13:11:36,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:36,431 INFO L93 Difference]: Finished difference Result 195 states and 301 transitions. [2020-07-20 13:11:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:11:36,432 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 775 [2020-07-20 13:11:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:36,436 INFO L225 Difference]: With dead ends: 195 [2020-07-20 13:11:36,437 INFO L226 Difference]: Without dead ends: 183 [2020-07-20 13:11:36,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1557 GetRequests, 1514 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-20 13:11:36,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-07-20 13:11:36,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 141. [2020-07-20 13:11:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-20 13:11:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 219 transitions. [2020-07-20 13:11:36,465 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 219 transitions. Word has length 775 [2020-07-20 13:11:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:36,465 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 219 transitions. [2020-07-20 13:11:36,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:11:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 219 transitions. [2020-07-20 13:11:36,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-20 13:11:36,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:36,478 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] [2020-07-20 13:11:36,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:36,693 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash -193438124, now seen corresponding path program 21 times [2020-07-20 13:11:36,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:36,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330300413] [2020-07-20 13:11:36,694 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 [2020-07-20 13:11:37,380 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:11:37,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:37,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 13:11:37,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 3182 proven. 1323 refuted. 0 times theorem prover too weak. 28679 trivial. 0 not checked. [2020-07-20 13:11:37,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:40,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:40,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:40,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:41,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:41,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:42,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:42,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:42,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:42,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:42,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:42,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 3192 proven. 1392 refuted. 0 times theorem prover too weak. 28600 trivial. 0 not checked. [2020-07-20 13:11:43,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330300413] [2020-07-20 13:11:43,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:11:43,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-20 13:11:43,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287506536] [2020-07-20 13:11:43,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:11:43,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:11:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:11:43,953 INFO L87 Difference]: Start difference. First operand 141 states and 219 transitions. Second operand 20 states. [2020-07-20 13:11:44,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:44,328 INFO L93 Difference]: Finished difference Result 218 states and 338 transitions. [2020-07-20 13:11:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:11:44,328 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 750 [2020-07-20 13:11:44,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:44,335 INFO L225 Difference]: With dead ends: 218 [2020-07-20 13:11:44,335 INFO L226 Difference]: Without dead ends: 211 [2020-07-20 13:11:44,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1507 GetRequests, 1464 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-20 13:11:44,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-20 13:11:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 146. [2020-07-20 13:11:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-20 13:11:44,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 226 transitions. [2020-07-20 13:11:44,376 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 226 transitions. Word has length 750 [2020-07-20 13:11:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:44,377 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 226 transitions. [2020-07-20 13:11:44,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:11:44,377 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 226 transitions. [2020-07-20 13:11:44,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-20 13:11:44,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:44,390 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] [2020-07-20 13:11:44,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:44,605 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:44,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:44,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1892267012, now seen corresponding path program 22 times [2020-07-20 13:11:44,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:44,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344291012] [2020-07-20 13:11:44,606 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 [2020-07-20 13:11:45,412 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:11:45,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:45,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 13:11:45,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1926 proven. 2354 refuted. 0 times theorem prover too weak. 31020 trivial. 0 not checked. [2020-07-20 13:11:45,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:48,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:49,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:49,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:49,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:49,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:50,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:50,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:50,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:50,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:50,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:50,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1930 proven. 2403 refuted. 0 times theorem prover too weak. 30967 trivial. 0 not checked. [2020-07-20 13:11:51,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344291012] [2020-07-20 13:11:51,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:11:51,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 13:11:51,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165242531] [2020-07-20 13:11:51,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:11:51,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:51,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:11:51,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:11:51,513 INFO L87 Difference]: Start difference. First operand 146 states and 226 transitions. Second operand 20 states. [2020-07-20 13:11:51,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:51,831 INFO L93 Difference]: Finished difference Result 264 states and 415 transitions. [2020-07-20 13:11:51,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:11:51,832 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 773 [2020-07-20 13:11:51,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:51,838 INFO L225 Difference]: With dead ends: 264 [2020-07-20 13:11:51,838 INFO L226 Difference]: Without dead ends: 247 [2020-07-20 13:11:51,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1552 GetRequests, 1512 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:11:51,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-07-20 13:11:51,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 182. [2020-07-20 13:11:51,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-07-20 13:11:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 288 transitions. [2020-07-20 13:11:51,872 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 288 transitions. Word has length 773 [2020-07-20 13:11:51,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:51,873 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 288 transitions. [2020-07-20 13:11:51,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:11:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 288 transitions. [2020-07-20 13:11:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 13:11:51,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:51,885 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] [2020-07-20 13:11:52,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:52,100 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:52,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:52,100 INFO L82 PathProgramCache]: Analyzing trace with hash -219590315, now seen corresponding path program 23 times [2020-07-20 13:11:52,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:52,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422658735] [2020-07-20 13:11:52,101 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 [2020-07-20 13:11:52,872 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:11:52,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:52,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 13:11:52,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3623 proven. 587 refuted. 0 times theorem prover too weak. 29978 trivial. 0 not checked. [2020-07-20 13:11:53,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:55,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:55,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:56,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:56,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:56,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:56,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:56,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:56,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:57,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3617 proven. 646 refuted. 0 times theorem prover too weak. 29925 trivial. 0 not checked. [2020-07-20 13:11:58,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422658735] [2020-07-20 13:11:58,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:11:58,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 13:11:58,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033531271] [2020-07-20 13:11:58,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:11:58,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:58,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:11:58,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:11:58,982 INFO L87 Difference]: Start difference. First operand 182 states and 288 transitions. Second operand 20 states. [2020-07-20 13:11:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:59,344 INFO L93 Difference]: Finished difference Result 306 states and 474 transitions. [2020-07-20 13:11:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:11:59,345 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 761 [2020-07-20 13:11:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:59,352 INFO L225 Difference]: With dead ends: 306 [2020-07-20 13:11:59,353 INFO L226 Difference]: Without dead ends: 299 [2020-07-20 13:11:59,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 1488 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:11:59,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-07-20 13:11:59,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 190. [2020-07-20 13:11:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-20 13:11:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 304 transitions. [2020-07-20 13:11:59,391 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 304 transitions. Word has length 761 [2020-07-20 13:11:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:59,392 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 304 transitions. [2020-07-20 13:11:59,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:11:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 304 transitions. [2020-07-20 13:11:59,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 13:11:59,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:59,411 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] [2020-07-20 13:11:59,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:59,626 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:59,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:59,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1953028691, now seen corresponding path program 24 times [2020-07-20 13:11:59,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:59,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651633377] [2020-07-20 13:11:59,627 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 [2020-07-20 13:12:00,300 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:12:00,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:00,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 13:12:00,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2164 proven. 2606 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-20 13:12:00,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:04,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:04,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:05,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:05,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:05,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:06,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:06,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:06,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:06,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:06,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:06,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:06,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2159 proven. 2681 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-20 13:12:07,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651633377] [2020-07-20 13:12:07,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:07,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 13:12:07,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785320209] [2020-07-20 13:12:07,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:12:07,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:07,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:12:07,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:12:07,616 INFO L87 Difference]: Start difference. First operand 190 states and 304 transitions. Second operand 22 states. [2020-07-20 13:12:08,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:08,057 INFO L93 Difference]: Finished difference Result 407 states and 649 transitions. [2020-07-20 13:12:08,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:12:08,059 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-20 13:12:08,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:08,068 INFO L225 Difference]: With dead ends: 407 [2020-07-20 13:12:08,068 INFO L226 Difference]: Without dead ends: 374 [2020-07-20 13:12:08,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 13:12:08,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-07-20 13:12:08,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 195. [2020-07-20 13:12:08,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-07-20 13:12:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 308 transitions. [2020-07-20 13:12:08,113 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 308 transitions. Word has length 761 [2020-07-20 13:12:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:08,114 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 308 transitions. [2020-07-20 13:12:08,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:12:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 308 transitions. [2020-07-20 13:12:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 13:12:08,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:08,128 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] [2020-07-20 13:12:08,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:08,343 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:08,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:08,344 INFO L82 PathProgramCache]: Analyzing trace with hash -435112683, now seen corresponding path program 25 times [2020-07-20 13:12:08,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:08,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203259497] [2020-07-20 13:12:08,345 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 [2020-07-20 13:12:09,112 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:09,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:09,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 13:12:09,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2984 proven. 1226 refuted. 0 times theorem prover too weak. 29978 trivial. 0 not checked. [2020-07-20 13:12:09,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:10,149 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 13:12:11,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:11,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:12,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:12,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:12,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:12,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:13,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:13,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:13,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:13,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:13,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:13,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2986 proven. 1277 refuted. 0 times theorem prover too weak. 29925 trivial. 0 not checked. [2020-07-20 13:12:15,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203259497] [2020-07-20 13:12:15,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:15,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 13:12:15,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593337729] [2020-07-20 13:12:15,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:12:15,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:15,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:12:15,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:12:15,280 INFO L87 Difference]: Start difference. First operand 195 states and 308 transitions. Second operand 20 states. [2020-07-20 13:12:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:15,630 INFO L93 Difference]: Finished difference Result 370 states and 597 transitions. [2020-07-20 13:12:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:12:15,635 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 761 [2020-07-20 13:12:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:15,645 INFO L225 Difference]: With dead ends: 370 [2020-07-20 13:12:15,646 INFO L226 Difference]: Without dead ends: 363 [2020-07-20 13:12:15,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 1488 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:12:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-07-20 13:12:15,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 241. [2020-07-20 13:12:15,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-07-20 13:12:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 393 transitions. [2020-07-20 13:12:15,698 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 393 transitions. Word has length 761 [2020-07-20 13:12:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:15,698 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 393 transitions. [2020-07-20 13:12:15,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:12:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 393 transitions. [2020-07-20 13:12:15,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-20 13:12:15,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:15,714 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] [2020-07-20 13:12:15,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:15,930 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:15,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:15,930 INFO L82 PathProgramCache]: Analyzing trace with hash 863066310, now seen corresponding path program 26 times [2020-07-20 13:12:15,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:15,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094302259] [2020-07-20 13:12:15,931 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:12:16,687 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:12:16,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:16,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 13:12:16,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1366 proven. 2914 refuted. 0 times theorem prover too weak. 31020 trivial. 0 not checked. [2020-07-20 13:12:16,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:20,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:21,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:21,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1372 proven. 2961 refuted. 0 times theorem prover too weak. 30967 trivial. 0 not checked. [2020-07-20 13:12:23,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094302259] [2020-07-20 13:12:23,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:23,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 13:12:23,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261467189] [2020-07-20 13:12:23,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:12:23,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:23,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:12:23,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:12:23,076 INFO L87 Difference]: Start difference. First operand 241 states and 393 transitions. Second operand 20 states. [2020-07-20 13:12:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:23,391 INFO L93 Difference]: Finished difference Result 310 states and 491 transitions. [2020-07-20 13:12:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:12:23,392 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 773 [2020-07-20 13:12:23,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:23,398 INFO L225 Difference]: With dead ends: 310 [2020-07-20 13:12:23,398 INFO L226 Difference]: Without dead ends: 283 [2020-07-20 13:12:23,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1552 GetRequests, 1512 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:12:23,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-07-20 13:12:23,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 215. [2020-07-20 13:12:23,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-07-20 13:12:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 341 transitions. [2020-07-20 13:12:23,434 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 341 transitions. Word has length 773 [2020-07-20 13:12:23,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:23,434 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 341 transitions. [2020-07-20 13:12:23,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:12:23,434 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 341 transitions. [2020-07-20 13:12:23,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2020-07-20 13:12:23,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:23,447 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 89, 56, 56, 56, 56, 56, 56, 56, 33, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:23,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:23,660 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:23,661 INFO L82 PathProgramCache]: Analyzing trace with hash 745548596, now seen corresponding path program 27 times [2020-07-20 13:12:23,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:23,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190172218] [2020-07-20 13:12:23,662 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 [2020-07-20 13:12:24,435 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:12:24,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:24,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 13:12:24,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 35388 backedges. 1604 proven. 3616 refuted. 0 times theorem prover too weak. 30168 trivial. 0 not checked. [2020-07-20 13:12:24,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:29,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:29,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:30,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:30,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:31,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:31,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:31,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:32,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:32,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:32,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:32,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:32,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 35388 backedges. 1608 proven. 3712 refuted. 0 times theorem prover too weak. 30068 trivial. 0 not checked. [2020-07-20 13:12:33,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190172218] [2020-07-20 13:12:33,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:33,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 13:12:33,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206042490] [2020-07-20 13:12:33,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:12:33,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:33,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:12:33,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:12:33,010 INFO L87 Difference]: Start difference. First operand 215 states and 341 transitions. Second operand 22 states. [2020-07-20 13:12:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:33,450 INFO L93 Difference]: Finished difference Result 330 states and 505 transitions. [2020-07-20 13:12:33,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:12:33,451 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 774 [2020-07-20 13:12:33,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:33,458 INFO L225 Difference]: With dead ends: 330 [2020-07-20 13:12:33,458 INFO L226 Difference]: Without dead ends: 303 [2020-07-20 13:12:33,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1556 GetRequests, 1508 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 13:12:33,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-07-20 13:12:33,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 197. [2020-07-20 13:12:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-07-20 13:12:33,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 306 transitions. [2020-07-20 13:12:33,493 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 306 transitions. Word has length 774 [2020-07-20 13:12:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:33,494 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 306 transitions. [2020-07-20 13:12:33,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:12:33,494 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 306 transitions. [2020-07-20 13:12:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-20 13:12:33,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:33,505 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] [2020-07-20 13:12:33,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:33,721 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:33,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:33,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1384108614, now seen corresponding path program 28 times [2020-07-20 13:12:33,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:33,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157076729] [2020-07-20 13:12:33,722 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 [2020-07-20 13:12:34,529 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:12:34,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:34,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 13:12:34,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1516 proven. 3334 refuted. 0 times theorem prover too weak. 30450 trivial. 0 not checked. [2020-07-20 13:12:34,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:38,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:38,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:40,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:40,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:40,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:41,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:41,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:41,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:41,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:41,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:41,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:41,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1513 proven. 3407 refuted. 0 times theorem prover too weak. 30380 trivial. 0 not checked. [2020-07-20 13:12:42,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157076729] [2020-07-20 13:12:42,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:42,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 13:12:42,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475007860] [2020-07-20 13:12:42,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:12:42,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:42,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:12:42,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:12:42,511 INFO L87 Difference]: Start difference. First operand 197 states and 306 transitions. Second operand 22 states. [2020-07-20 13:12:43,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:43,008 INFO L93 Difference]: Finished difference Result 289 states and 436 transitions. [2020-07-20 13:12:43,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:12:43,009 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 773 [2020-07-20 13:12:43,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:43,015 INFO L225 Difference]: With dead ends: 289 [2020-07-20 13:12:43,015 INFO L226 Difference]: Without dead ends: 272 [2020-07-20 13:12:43,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1508 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 13:12:43,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-07-20 13:12:43,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 179. [2020-07-20 13:12:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-07-20 13:12:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 271 transitions. [2020-07-20 13:12:43,045 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 271 transitions. Word has length 773 [2020-07-20 13:12:43,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:43,045 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 271 transitions. [2020-07-20 13:12:43,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:12:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 271 transitions. [2020-07-20 13:12:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 13:12:43,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:43,052 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] [2020-07-20 13:12:43,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:43,253 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:43,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1365832043, now seen corresponding path program 29 times [2020-07-20 13:12:43,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:43,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247110573] [2020-07-20 13:12:43,255 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 [2020-07-20 13:12:44,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:44,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:44,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 13:12:44,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3378 proven. 1392 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-20 13:12:44,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:47,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:48,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:48,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:49,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:49,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:49,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:49,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:50,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:50,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:50,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3371 proven. 1469 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-20 13:12:52,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247110573] [2020-07-20 13:12:52,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:52,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 13:12:52,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971190954] [2020-07-20 13:12:52,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:12:52,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:52,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:12:52,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:12:52,304 INFO L87 Difference]: Start difference. First operand 179 states and 271 transitions. Second operand 22 states. [2020-07-20 13:12:52,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:52,780 INFO L93 Difference]: Finished difference Result 433 states and 670 transitions. [2020-07-20 13:12:52,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:12:52,866 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-20 13:12:52,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:52,874 INFO L225 Difference]: With dead ends: 433 [2020-07-20 13:12:52,874 INFO L226 Difference]: Without dead ends: 371 [2020-07-20 13:12:52,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 13:12:52,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-07-20 13:12:52,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 101. [2020-07-20 13:12:52,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 13:12:52,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 149 transitions. [2020-07-20 13:12:52,903 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 149 transitions. Word has length 761 [2020-07-20 13:12:52,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:52,903 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 149 transitions. [2020-07-20 13:12:52,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:12:52,903 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 149 transitions. [2020-07-20 13:12:52,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-20 13:12:52,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:52,910 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] [2020-07-20 13:12:53,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:53,123 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:53,124 INFO L82 PathProgramCache]: Analyzing trace with hash 19782726, now seen corresponding path program 30 times [2020-07-20 13:12:53,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:53,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945443472] [2020-07-20 13:12:53,125 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 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:53,977 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:12:53,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:53,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 13:12:53,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 805 proven. 4243 refuted. 0 times theorem prover too weak. 28136 trivial. 0 not checked. [2020-07-20 13:12:54,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:58,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:00,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:01,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:01,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:02,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:02,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:02,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:02,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:02,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:02,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 819 proven. 4329 refuted. 0 times theorem prover too weak. 28036 trivial. 0 not checked. [2020-07-20 13:13:03,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945443472] [2020-07-20 13:13:03,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:13:03,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 13:13:03,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393877603] [2020-07-20 13:13:03,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:13:03,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:13:03,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:13:03,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:13:03,169 INFO L87 Difference]: Start difference. First operand 101 states and 149 transitions. Second operand 22 states. [2020-07-20 13:13:03,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:13:03,673 INFO L93 Difference]: Finished difference Result 271 states and 409 transitions. [2020-07-20 13:13:03,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:13:03,675 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 750 [2020-07-20 13:13:03,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:13:03,679 INFO L225 Difference]: With dead ends: 271 [2020-07-20 13:13:03,679 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 13:13:03,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1508 GetRequests, 1460 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 13:13:03,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 13:13:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-07-20 13:13:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-20 13:13:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-07-20 13:13:03,693 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 750 [2020-07-20 13:13:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:13:03,693 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-07-20 13:13:03,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:13:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-07-20 13:13:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 13:13:03,699 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:13:03,700 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] [2020-07-20 13:13:03,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:03,913 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:13:03,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:13:03,914 INFO L82 PathProgramCache]: Analyzing trace with hash 795943445, now seen corresponding path program 31 times [2020-07-20 13:13:03,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:13:03,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061931364] [2020-07-20 13:13:03,915 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:04,800 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:13:04,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:13:04,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 13:13:04,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:13:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 872 proven. 3898 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-20 13:13:05,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:13:09,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:10,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:10,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:11,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:11,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:12,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:12,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:12,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:12,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:13,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:13,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 877 proven. 3963 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-20 13:13:13,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061931364] [2020-07-20 13:13:13,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:13:13,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 13:13:13,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794747620] [2020-07-20 13:13:13,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:13:13,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:13:13,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:13:13,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:13:13,423 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 22 states. [2020-07-20 13:13:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:13:13,812 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2020-07-20 13:13:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:13:13,814 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-20 13:13:13,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:13:13,816 INFO L225 Difference]: With dead ends: 135 [2020-07-20 13:13:13,817 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 13:13:13,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 13:13:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 13:13:13,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-07-20 13:13:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-20 13:13:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2020-07-20 13:13:13,828 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 761 [2020-07-20 13:13:13,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:13:13,828 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2020-07-20 13:13:13,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:13:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2020-07-20 13:13:13,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 13:13:13,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:13:13,833 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] [2020-07-20 13:13:14,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:14,034 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:13:14,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:13:14,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1599781781, now seen corresponding path program 32 times [2020-07-20 13:13:14,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:13:14,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926573781] [2020-07-20 13:13:14,036 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 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:14,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:13:14,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:13:14,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 13:13:14,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:13:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 883 proven. 4434 refuted. 0 times theorem prover too weak. 28871 trivial. 0 not checked. [2020-07-20 13:13:15,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:13:17,237 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-07-20 13:13:20,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:22,168 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 6 [2020-07-20 13:13:22,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:22,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:23,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:23,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:24,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:24,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:24,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:24,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:24,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:25,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:25,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:25,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:25,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 875 proven. 4534 refuted. 0 times theorem prover too weak. 28779 trivial. 0 not checked. [2020-07-20 13:13:25,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926573781] [2020-07-20 13:13:25,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:13:25,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-20 13:13:25,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614587404] [2020-07-20 13:13:25,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 13:13:25,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:13:25,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 13:13:25,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:13:25,414 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 24 states. [2020-07-20 13:13:26,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:13:26,002 INFO L93 Difference]: Finished difference Result 219 states and 262 transitions. [2020-07-20 13:13:26,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 13:13:26,004 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 761 [2020-07-20 13:13:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:13:26,007 INFO L225 Difference]: With dead ends: 219 [2020-07-20 13:13:26,007 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:13:26,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1530 GetRequests, 1480 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 13:13:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:13:26,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:13:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:13:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:13:26,017 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 761 [2020-07-20 13:13:26,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:13:26,017 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:13:26,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 13:13:26,018 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:13:26,018 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:13:26,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:26,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:13:32,406 WARN L193 SmtUtils]: Spent 5.59 s on a formula simplification. DAG size of input: 640 DAG size of output: 195 [2020-07-20 13:13:38,633 WARN L193 SmtUtils]: Spent 6.22 s on a formula simplification. DAG size of input: 766 DAG size of output: 230 [2020-07-20 13:13:45,859 WARN L193 SmtUtils]: Spent 7.22 s on a formula simplification. DAG size of input: 787 DAG size of output: 310 [2020-07-20 13:13:46,825 WARN L193 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 126 [2020-07-20 13:13:52,980 WARN L193 SmtUtils]: Spent 6.15 s on a formula simplification. DAG size of input: 717 DAG size of output: 280 [2020-07-20 13:13:53,121 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:13:59,243 WARN L193 SmtUtils]: Spent 6.12 s on a formula simplification. DAG size of input: 717 DAG size of output: 280 [2020-07-20 13:13:59,771 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 104 [2020-07-20 13:14:05,749 WARN L193 SmtUtils]: Spent 5.98 s on a formula simplification. DAG size of input: 757 DAG size of output: 228 [2020-07-20 13:14:09,407 WARN L193 SmtUtils]: Spent 3.66 s on a formula simplification. DAG size of input: 640 DAG size of output: 195 [2020-07-20 13:14:15,474 WARN L193 SmtUtils]: Spent 6.06 s on a formula simplification. DAG size of input: 767 DAG size of output: 230 [2020-07-20 13:14:22,612 WARN L193 SmtUtils]: Spent 7.14 s on a formula simplification. DAG size of input: 787 DAG size of output: 310 [2020-07-20 13:14:23,157 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 104 [2020-07-20 13:14:23,298 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:14:30,789 WARN L193 SmtUtils]: Spent 7.49 s on a formula simplification. DAG size of input: 784 DAG size of output: 343 [2020-07-20 13:14:31,336 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 104 [2020-07-20 13:14:32,291 WARN L193 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 126 [2020-07-20 13:14:32,433 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:14:33,184 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 116 [2020-07-20 13:14:40,177 WARN L193 SmtUtils]: Spent 6.99 s on a formula simplification. DAG size of input: 778 DAG size of output: 310 [2020-07-20 13:14:46,026 WARN L193 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 757 DAG size of output: 228 [2020-07-20 13:14:46,565 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 104 [2020-07-20 13:14:53,980 WARN L193 SmtUtils]: Spent 7.41 s on a formula simplification. DAG size of input: 784 DAG size of output: 343 [2020-07-20 13:14:59,852 WARN L193 SmtUtils]: Spent 5.87 s on a formula simplification. DAG size of input: 757 DAG size of output: 228 [2020-07-20 13:15:06,325 WARN L193 SmtUtils]: Spent 6.47 s on a formula simplification. DAG size of input: 717 DAG size of output: 280 [2020-07-20 13:15:13,542 WARN L193 SmtUtils]: Spent 7.21 s on a formula simplification. DAG size of input: 787 DAG size of output: 310 [2020-07-20 13:15:19,422 WARN L193 SmtUtils]: Spent 5.88 s on a formula simplification. DAG size of input: 757 DAG size of output: 228 [2020-07-20 13:15:23,019 WARN L193 SmtUtils]: Spent 3.59 s on a formula simplification. DAG size of input: 642 DAG size of output: 194 [2020-07-20 13:15:23,580 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 104 [2020-07-20 13:15:24,552 WARN L193 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 126 [2020-07-20 13:15:28,165 WARN L193 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 642 DAG size of output: 194 [2020-07-20 13:15:31,588 WARN L193 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 610 DAG size of output: 176 [2020-07-20 13:15:38,729 WARN L193 SmtUtils]: Spent 7.14 s on a formula simplification. DAG size of input: 787 DAG size of output: 310 [2020-07-20 13:15:38,881 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 64 [2020-07-20 13:15:44,771 WARN L193 SmtUtils]: Spent 5.89 s on a formula simplification. DAG size of input: 757 DAG size of output: 228 [2020-07-20 13:15:51,880 WARN L193 SmtUtils]: Spent 7.11 s on a formula simplification. DAG size of input: 778 DAG size of output: 310 [2020-07-20 13:15:55,345 WARN L193 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 610 DAG size of output: 176 [2020-07-20 13:16:01,389 WARN L193 SmtUtils]: Spent 6.04 s on a formula simplification. DAG size of input: 717 DAG size of output: 280 [2020-07-20 13:16:01,530 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:16:02,073 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 104 [2020-07-20 13:16:09,547 WARN L193 SmtUtils]: Spent 7.47 s on a formula simplification. DAG size of input: 784 DAG size of output: 343 [2020-07-20 13:16:15,386 WARN L193 SmtUtils]: Spent 5.84 s on a formula simplification. DAG size of input: 748 DAG size of output: 228 [2020-07-20 13:16:15,927 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 104 [2020-07-20 13:16:16,072 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:16:16,223 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 64 [2020-07-20 13:16:22,108 WARN L193 SmtUtils]: Spent 5.88 s on a formula simplification. DAG size of input: 757 DAG size of output: 228 [2020-07-20 13:16:27,983 WARN L193 SmtUtils]: Spent 5.87 s on a formula simplification. DAG size of input: 757 DAG size of output: 228 [2020-07-20 13:16:35,037 WARN L193 SmtUtils]: Spent 7.05 s on a formula simplification. DAG size of input: 778 DAG size of output: 310 [2020-07-20 13:16:42,423 WARN L193 SmtUtils]: Spent 7.38 s on a formula simplification. DAG size of input: 787 DAG size of output: 328 [2020-07-20 13:16:42,564 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:16:42,717 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 64 [2020-07-20 13:16:43,258 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 104 [2020-07-20 13:16:43,799 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 104 [2020-07-20 13:16:44,341 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 104 [2020-07-20 13:16:49,780 WARN L193 SmtUtils]: Spent 5.44 s on a formula simplification. DAG size of input: 720 DAG size of output: 224 [2020-07-20 13:16:55,631 WARN L193 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 748 DAG size of output: 228 [2020-07-20 13:17:01,098 WARN L193 SmtUtils]: Spent 5.46 s on a formula simplification. DAG size of input: 720 DAG size of output: 224 [2020-07-20 13:17:08,513 WARN L193 SmtUtils]: Spent 7.41 s on a formula simplification. DAG size of input: 784 DAG size of output: 343 [2020-07-20 13:17:15,825 WARN L193 SmtUtils]: Spent 7.31 s on a formula simplification. DAG size of input: 787 DAG size of output: 328 [2020-07-20 13:17:19,271 WARN L193 SmtUtils]: Spent 3.44 s on a formula simplification. DAG size of input: 612 DAG size of output: 175 [2020-07-20 13:17:19,809 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 104 [2020-07-20 13:17:19,964 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:17:20,361 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 94 [2020-07-20 13:17:23,820 WARN L193 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 612 DAG size of output: 175 [2020-07-20 13:17:29,710 WARN L193 SmtUtils]: Spent 5.89 s on a formula simplification. DAG size of input: 757 DAG size of output: 228 [2020-07-20 13:17:37,123 WARN L193 SmtUtils]: Spent 7.41 s on a formula simplification. DAG size of input: 784 DAG size of output: 343 [2020-07-20 13:17:37,261 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:17:37,423 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 63 [2020-07-20 13:17:37,972 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 104 [2020-07-20 13:17:43,330 WARN L193 SmtUtils]: Spent 5.36 s on a formula simplification. DAG size of input: 720 DAG size of output: 209 [2020-07-20 13:17:49,232 WARN L193 SmtUtils]: Spent 5.90 s on a formula simplification. DAG size of input: 757 DAG size of output: 228 [2020-07-20 13:17:49,374 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:17:55,216 WARN L193 SmtUtils]: Spent 5.84 s on a formula simplification. DAG size of input: 748 DAG size of output: 228 [2020-07-20 13:18:02,642 WARN L193 SmtUtils]: Spent 7.42 s on a formula simplification. DAG size of input: 787 DAG size of output: 328 [2020-07-20 13:18:03,184 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 104 [2020-07-20 13:18:04,380 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 440 DAG size of output: 120 [2020-07-20 13:18:05,496 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 409 DAG size of output: 134 [2020-07-20 13:18:05,940 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 94 [2020-07-20 13:18:07,129 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 420 DAG size of output: 135 [2020-07-20 13:18:14,616 WARN L193 SmtUtils]: Spent 7.48 s on a formula simplification. DAG size of input: 787 DAG size of output: 328 [2020-07-20 13:18:14,754 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:18:22,061 WARN L193 SmtUtils]: Spent 7.30 s on a formula simplification. DAG size of input: 787 DAG size of output: 311 [2020-07-20 13:18:22,200 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:18:28,340 WARN L193 SmtUtils]: Spent 6.14 s on a formula simplification. DAG size of input: 757 DAG size of output: 228 [2020-07-20 13:18:28,878 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 104 [2020-07-20 13:18:34,982 WARN L193 SmtUtils]: Spent 6.10 s on a formula simplification. DAG size of input: 757 DAG size of output: 228 [2020-07-20 13:18:35,302 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 82 [2020-07-20 13:18:41,344 WARN L193 SmtUtils]: Spent 6.04 s on a formula simplification. DAG size of input: 721 DAG size of output: 209 [2020-07-20 13:18:41,483 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:18:48,693 WARN L193 SmtUtils]: Spent 7.21 s on a formula simplification. DAG size of input: 787 DAG size of output: 311 [2020-07-20 13:18:48,834 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:18:55,976 WARN L193 SmtUtils]: Spent 7.14 s on a formula simplification. DAG size of input: 754 DAG size of output: 338 [2020-07-20 13:19:04,488 WARN L193 SmtUtils]: Spent 8.51 s on a formula simplification. DAG size of input: 793 DAG size of output: 330 [2020-07-20 13:19:04,630 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:19:05,174 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 104 [2020-07-20 13:19:06,338 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 420 DAG size of output: 135 [2020-07-20 13:19:12,193 WARN L193 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 748 DAG size of output: 228 [2020-07-20 13:19:13,367 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 412 DAG size of output: 132 [2020-07-20 13:19:20,495 WARN L193 SmtUtils]: Spent 7.13 s on a formula simplification. DAG size of input: 788 DAG size of output: 311 [2020-07-20 13:19:20,634 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:19:21,181 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 104 [2020-07-20 13:19:21,514 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 82 [2020-07-20 13:19:26,056 WARN L193 SmtUtils]: Spent 4.54 s on a formula simplification. DAG size of input: 669 DAG size of output: 207 [2020-07-20 13:19:33,208 WARN L193 SmtUtils]: Spent 7.15 s on a formula simplification. DAG size of input: 754 DAG size of output: 338 [2020-07-20 13:19:35,014 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 705 DAG size of output: 280 [2020-07-20 13:19:35,155 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:19:42,338 WARN L193 SmtUtils]: Spent 7.18 s on a formula simplification. DAG size of input: 787 DAG size of output: 310 [2020-07-20 13:19:42,877 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 104 [2020-07-20 13:19:43,018 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:19:50,155 WARN L193 SmtUtils]: Spent 7.13 s on a formula simplification. DAG size of input: 787 DAG size of output: 310 [2020-07-20 13:19:56,167 WARN L193 SmtUtils]: Spent 6.01 s on a formula simplification. DAG size of input: 766 DAG size of output: 229 [2020-07-20 13:19:57,355 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 421 DAG size of output: 135 [2020-07-20 13:20:03,368 WARN L193 SmtUtils]: Spent 6.01 s on a formula simplification. DAG size of input: 748 DAG size of output: 228 [2020-07-20 13:20:03,553 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:20:11,002 WARN L193 SmtUtils]: Spent 7.45 s on a formula simplification. DAG size of input: 787 DAG size of output: 310 [2020-07-20 13:20:12,159 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 412 DAG size of output: 132 [2020-07-20 13:20:19,284 WARN L193 SmtUtils]: Spent 7.12 s on a formula simplification. DAG size of input: 787 DAG size of output: 310 [2020-07-20 13:20:19,821 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 104 [2020-07-20 13:20:26,943 WARN L193 SmtUtils]: Spent 7.12 s on a formula simplification. DAG size of input: 754 DAG size of output: 338 [2020-07-20 13:20:31,658 WARN L193 SmtUtils]: Spent 4.71 s on a formula simplification. DAG size of input: 671 DAG size of output: 191 [2020-07-20 13:20:31,798 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:20:38,957 WARN L193 SmtUtils]: Spent 7.16 s on a formula simplification. DAG size of input: 787 DAG size of output: 310 [2020-07-20 13:20:39,502 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 104 [2020-07-20 13:20:40,686 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 413 DAG size of output: 132 [2020-07-20 13:20:40,827 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:20:41,367 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 104 [2020-07-20 13:20:47,435 WARN L193 SmtUtils]: Spent 6.07 s on a formula simplification. DAG size of input: 757 DAG size of output: 246 [2020-07-20 13:20:47,575 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:20:53,576 WARN L193 SmtUtils]: Spent 6.00 s on a formula simplification. DAG size of input: 766 DAG size of output: 229 [2020-07-20 13:21:00,745 WARN L193 SmtUtils]: Spent 7.17 s on a formula simplification. DAG size of input: 787 DAG size of output: 310 [2020-07-20 13:21:07,912 WARN L193 SmtUtils]: Spent 7.16 s on a formula simplification. DAG size of input: 787 DAG size of output: 310 [2020-07-20 13:21:15,023 WARN L193 SmtUtils]: Spent 7.11 s on a formula simplification. DAG size of input: 787 DAG size of output: 310 [2020-07-20 13:21:15,167 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:21:22,281 WARN L193 SmtUtils]: Spent 7.11 s on a formula simplification. DAG size of input: 754 DAG size of output: 338 [2020-07-20 13:21:28,298 WARN L193 SmtUtils]: Spent 6.01 s on a formula simplification. DAG size of input: 757 DAG size of output: 246 [2020-07-20 13:21:28,462 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 65 [2020-07-20 13:21:28,984 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 104 [2020-07-20 13:21:31,387 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 552 DAG size of output: 153 [2020-07-20 13:21:31,525 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:21:38,589 WARN L193 SmtUtils]: Spent 7.06 s on a formula simplification. DAG size of input: 787 DAG size of output: 310 [2020-07-20 13:21:44,431 WARN L193 SmtUtils]: Spent 5.84 s on a formula simplification. DAG size of input: 757 DAG size of output: 229 [2020-07-20 13:21:45,013 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 110 [2020-07-20 13:21:45,538 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 104 [2020-07-20 13:21:51,529 WARN L193 SmtUtils]: Spent 5.99 s on a formula simplification. DAG size of input: 757 DAG size of output: 246 [2020-07-20 13:21:52,262 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 117 [2020-07-20 13:21:52,425 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 65 [2020-07-20 13:21:59,520 WARN L193 SmtUtils]: Spent 7.09 s on a formula simplification. DAG size of input: 787 DAG size of output: 310 [2020-07-20 13:22:01,922 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 552 DAG size of output: 153 [2020-07-20 13:22:08,838 WARN L193 SmtUtils]: Spent 6.91 s on a formula simplification. DAG size of input: 778 DAG size of output: 310 [2020-07-20 13:22:09,378 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 104 [2020-07-20 13:22:15,229 WARN L193 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 757 DAG size of output: 229 [2020-07-20 13:22:15,365 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 13:22:22,375 WARN L193 SmtUtils]: Spent 7.01 s on a formula simplification. DAG size of input: 787 DAG size of output: 310 [2020-07-20 13:22:28,178 WARN L193 SmtUtils]: Spent 5.80 s on a formula simplification. DAG size of input: 757 DAG size of output: 228 [2020-07-20 13:22:28,317 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63