/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:20:08,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:20:08,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:20:08,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:20:08,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:20:08,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:20:08,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:20:08,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:20:08,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:20:08,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:20:08,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:20:08,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:20:08,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:20:08,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:20:08,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:20:08,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:20:08,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:20:08,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:20:08,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:20:08,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:20:08,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:20:08,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:20:08,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:20:08,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:20:08,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:20:08,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:20:08,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:20:08,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:20:08,765 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:20:08,783 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:20:08,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:20:08,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:20:08,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:20:08,785 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:20:08,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:20:08,786 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:20:08,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:20:08,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:20:08,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:20:08,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:20:08,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:20:08,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:20:08,787 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:20:08,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:20:08,787 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:20:08,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:20:08,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:20:08,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:20:08,788 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:20:08,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:20:08,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:20:08,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:20:08,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:20:08,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:20:08,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:20:08,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:08,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:20:08,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:20:08,790 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:20:09,134 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:20:09,152 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:20:09,157 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:20:09,159 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:20:09,159 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:20:09,160 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-07-21 22:20:09,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9cea97ff/10625e4162794ab4b9e5ed441001215f/FLAGa69b124a1 [2020-07-21 22:20:09,823 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:20:09,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-07-21 22:20:09,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9cea97ff/10625e4162794ab4b9e5ed441001215f/FLAGa69b124a1 [2020-07-21 22:20:10,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9cea97ff/10625e4162794ab4b9e5ed441001215f [2020-07-21 22:20:10,143 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:20:10,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:20:10,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:20:10,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:20:10,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:20:10,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:20:10" (1/1) ... [2020-07-21 22:20:10,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70edd8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:10, skipping insertion in model container [2020-07-21 22:20:10,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:20:10" (1/1) ... [2020-07-21 22:20:10,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:20:10,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:20:10,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:20:10,465 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:20:10,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:20:10,506 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:20:10,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:10 WrapperNode [2020-07-21 22:20:10,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:20:10,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:20:10,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:20:10,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:20:10,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:10" (1/1) ... [2020-07-21 22:20:10,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:10" (1/1) ... [2020-07-21 22:20:10,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:10" (1/1) ... [2020-07-21 22:20:10,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:10" (1/1) ... [2020-07-21 22:20:10,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:10" (1/1) ... [2020-07-21 22:20:10,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:10" (1/1) ... [2020-07-21 22:20:10,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:10" (1/1) ... [2020-07-21 22:20:10,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:20:10,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:20:10,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:20:10,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:20:10,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:20:10,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:20:10,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:20:10,745 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 22:20:10,745 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 22:20:10,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:20:10,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:20:10,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:20:10,749 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 22:20:10,749 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 22:20:10,750 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:20:10,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:20:10,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:20:11,024 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:20:11,025 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:20:11,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:20:11 BoogieIcfgContainer [2020-07-21 22:20:11,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:20:11,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:20:11,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:20:11,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:20:11,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:20:10" (1/3) ... [2020-07-21 22:20:11,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605407e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:20:11, skipping insertion in model container [2020-07-21 22:20:11,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:10" (2/3) ... [2020-07-21 22:20:11,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605407e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:20:11, skipping insertion in model container [2020-07-21 22:20:11,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:20:11" (3/3) ... [2020-07-21 22:20:11,043 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-2.c [2020-07-21 22:20:11,059 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:20:11,070 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:20:11,094 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:20:11,137 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:20:11,137 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:20:11,138 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:20:11,138 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:20:11,139 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:20:11,139 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:20:11,140 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:20:11,140 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:20:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 22:20:11,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:20:11,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:11,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:11,186 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 22:20:11,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:11,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825534679] [2020-07-21 22:20:11,211 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:11,302 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:11,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:11,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:20:11,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:20:11,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:20:11,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825534679] [2020-07-21 22:20:11,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:20:11,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:20:11,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842617142] [2020-07-21 22:20:11,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:20:11,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:11,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:20:11,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:20:11,459 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 22:20:11,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:11,607 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 22:20:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:20:11,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:20:11,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:11,625 INFO L225 Difference]: With dead ends: 44 [2020-07-21 22:20:11,626 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 22:20:11,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:20:11,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 22:20:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 22:20:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:20:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:20:11,698 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 22:20:11,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:11,699 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:20:11,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:20:11,699 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:20:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:20:11,702 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:11,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:11,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:11,918 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:11,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:11,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 22:20:11,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:11,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769432877] [2020-07-21 22:20:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:11,964 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:20:11,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:11,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:20:11,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:20:12,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:20:12,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769432877] [2020-07-21 22:20:12,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:20:12,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:20:12,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955457377] [2020-07-21 22:20:12,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:20:12,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:12,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:20:12,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:20:12,028 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 22:20:12,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:12,138 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 22:20:12,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:20:12,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 22:20:12,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:12,141 INFO L225 Difference]: With dead ends: 36 [2020-07-21 22:20:12,141 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 22:20:12,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:20:12,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 22:20:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 22:20:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:20:12,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:20:12,155 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 22:20:12,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:12,156 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:20:12,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:20:12,156 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:20:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:20:12,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:12,159 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:12,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:12,365 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:12,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 22:20:12,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:12,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444286838] [2020-07-21 22:20:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:12,402 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:12,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:12,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:20:12,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:20:12,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:12,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:12,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:20:12,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444286838] [2020-07-21 22:20:12,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:12,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:20:12,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83981335] [2020-07-21 22:20:12,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:20:12,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:12,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:20:12,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:20:12,894 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 22:20:13,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:13,105 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 22:20:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:20:13,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 22:20:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:13,111 INFO L225 Difference]: With dead ends: 41 [2020-07-21 22:20:13,111 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 22:20:13,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:20:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 22:20:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 22:20:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:20:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:20:13,142 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 22:20:13,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:13,143 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:20:13,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:20:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:20:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:20:13,145 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:13,146 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:13,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:13,347 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:13,349 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 22:20:13,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:13,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202352934] [2020-07-21 22:20:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:13,381 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:13,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:13,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:20:13,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:20:13,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:13,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:13,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:20:13,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202352934] [2020-07-21 22:20:13,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:13,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:20:13,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062732868] [2020-07-21 22:20:13,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:20:13,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:13,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:20:13,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:20:13,671 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 22:20:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:13,847 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 22:20:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:20:13,847 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 22:20:13,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:13,852 INFO L225 Difference]: With dead ends: 46 [2020-07-21 22:20:13,852 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 22:20:13,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:20:13,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 22:20:13,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 22:20:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:20:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:20:13,869 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 22:20:13,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:13,870 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:20:13,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:20:13,870 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:20:13,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 22:20:13,872 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:13,873 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:14,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:14,086 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:14,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:14,088 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 22:20:14,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:14,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992465916] [2020-07-21 22:20:14,089 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:14,122 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:14,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:14,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:20:14,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 22:20:14,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:14,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:14,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:14,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:20:14,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992465916] [2020-07-21 22:20:14,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:14,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:20:14,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880371417] [2020-07-21 22:20:14,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:20:14,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:14,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:20:14,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:20:14,656 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 22:20:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:14,879 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 22:20:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:20:14,880 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 22:20:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:14,882 INFO L225 Difference]: With dead ends: 51 [2020-07-21 22:20:14,882 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 22:20:14,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:20:14,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 22:20:14,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 22:20:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:20:14,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:20:14,897 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 22:20:14,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:14,898 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:20:14,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:20:14,898 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:20:14,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 22:20:14,900 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:14,901 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:15,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:15,113 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:15,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:15,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 22:20:15,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:15,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043948029] [2020-07-21 22:20:15,115 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:15,147 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:15,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:15,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:20:15,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 22:20:15,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:15,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:15,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:15,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:20:15,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043948029] [2020-07-21 22:20:15,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:15,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:20:15,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384368798] [2020-07-21 22:20:15,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:20:15,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:15,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:20:15,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:20:15,571 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 22:20:15,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:15,786 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 22:20:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:20:15,787 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 22:20:15,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:15,791 INFO L225 Difference]: With dead ends: 56 [2020-07-21 22:20:15,792 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 22:20:15,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:20:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 22:20:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 22:20:15,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:20:15,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:20:15,830 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 22:20:15,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:15,831 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:20:15,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:20:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:20:15,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 22:20:15,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:15,834 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:16,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:16,050 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:16,051 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 22:20:16,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:16,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339708408] [2020-07-21 22:20:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:16,096 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:16,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:16,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:20:16,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 22:20:16,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:16,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:16,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:16,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:16,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:20:16,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339708408] [2020-07-21 22:20:16,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:16,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 22:20:16,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24272072] [2020-07-21 22:20:16,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:20:16,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:16,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:20:16,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:20:16,842 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 22:20:17,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:17,059 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 22:20:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:20:17,060 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 22:20:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:17,062 INFO L225 Difference]: With dead ends: 61 [2020-07-21 22:20:17,063 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 22:20:17,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:20:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 22:20:17,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 22:20:17,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:20:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:20:17,083 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 22:20:17,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:17,084 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:20:17,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:20:17,084 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:20:17,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 22:20:17,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:17,091 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:17,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:17,293 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:17,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:17,294 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 22:20:17,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:17,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600841525] [2020-07-21 22:20:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:17,334 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:17,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:17,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:20:17,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 22:20:17,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:17,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:17,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:17,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:17,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:17,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:20:18,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600841525] [2020-07-21 22:20:18,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:18,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 22:20:18,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913852930] [2020-07-21 22:20:18,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:20:18,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:18,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:20:18,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:20:18,014 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 22:20:18,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:18,224 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 22:20:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:20:18,225 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 22:20:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:18,227 INFO L225 Difference]: With dead ends: 66 [2020-07-21 22:20:18,227 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 22:20:18,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:20:18,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 22:20:18,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 22:20:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:20:18,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:20:18,239 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 22:20:18,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:18,239 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:20:18,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:20:18,240 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:20:18,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 22:20:18,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:18,241 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:18,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:18,457 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:18,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:18,458 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 22:20:18,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:18,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405156601] [2020-07-21 22:20:18,459 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:18,519 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:18,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:18,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:20:18,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 22:20:18,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:19,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:19,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:19,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:19,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:19,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:19,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:19,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 22:20:19,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405156601] [2020-07-21 22:20:19,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:19,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 22:20:19,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530175721] [2020-07-21 22:20:19,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:20:19,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:19,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:20:19,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:20:19,566 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 22:20:19,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:19,837 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 22:20:19,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:20:19,838 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 22:20:19,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:19,841 INFO L225 Difference]: With dead ends: 71 [2020-07-21 22:20:19,841 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 22:20:19,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:20:19,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 22:20:19,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 22:20:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:20:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 22:20:19,856 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 22:20:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:19,856 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 22:20:19,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:20:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 22:20:19,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 22:20:19,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:19,859 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:20,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:20,071 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:20,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:20,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 22:20:20,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:20,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771603665] [2020-07-21 22:20:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:20,125 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:20,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:20,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:20:20,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 22:20:20,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:20,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:20,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:21,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:21,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 22:20:21,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771603665] [2020-07-21 22:20:21,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:21,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 22:20:21,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884553631] [2020-07-21 22:20:21,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:20:21,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:21,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:20:21,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:20:21,194 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 22:20:21,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:21,454 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 22:20:21,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:20:21,455 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 22:20:21,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:21,457 INFO L225 Difference]: With dead ends: 76 [2020-07-21 22:20:21,458 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 22:20:21,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:20:21,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 22:20:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 22:20:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:20:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 22:20:21,496 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 22:20:21,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:21,497 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 22:20:21,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:20:21,498 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 22:20:21,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 22:20:21,503 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:21,503 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:21,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:21,718 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:21,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:21,719 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 22:20:21,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:21,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744836239] [2020-07-21 22:20:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:21,797 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:21,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:21,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:20:21,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 22:20:21,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:23,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:23,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:23,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:23,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:23,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:23,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:23,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:23,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 22:20:23,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744836239] [2020-07-21 22:20:23,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:23,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 22:20:23,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708273746] [2020-07-21 22:20:23,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:20:23,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:23,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:20:23,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:20:23,827 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 22:20:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:24,157 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 22:20:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:20:24,158 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 22:20:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:24,161 INFO L225 Difference]: With dead ends: 81 [2020-07-21 22:20:24,162 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 22:20:24,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:20:24,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 22:20:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 22:20:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 22:20:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 22:20:24,176 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 22:20:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:24,177 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 22:20:24,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:20:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 22:20:24,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 22:20:24,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:24,180 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:24,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:24,388 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:24,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 22:20:24,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:24,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544398403] [2020-07-21 22:20:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:24,463 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:24,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:24,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:20:24,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 22:20:24,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:25,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:25,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:25,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:25,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:25,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:25,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:26,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 22:20:26,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544398403] [2020-07-21 22:20:26,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:26,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 22:20:26,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657320859] [2020-07-21 22:20:26,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:20:26,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:26,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:20:26,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:20:26,161 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 22:20:26,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:26,564 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 22:20:26,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:20:26,564 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 22:20:26,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:26,567 INFO L225 Difference]: With dead ends: 86 [2020-07-21 22:20:26,568 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 22:20:26,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:20:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 22:20:26,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 22:20:26,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 22:20:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 22:20:26,582 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 22:20:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:26,583 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 22:20:26,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:20:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 22:20:26,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 22:20:26,586 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:26,586 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:26,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:26,800 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:26,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:26,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 22:20:26,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:26,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449103776] [2020-07-21 22:20:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:26,895 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:26,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:26,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:20:26,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 22:20:27,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:28,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:28,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:28,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:29,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:29,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:29,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:29,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:29,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:29,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:29,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:29,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 22:20:29,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449103776] [2020-07-21 22:20:29,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:29,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 22:20:29,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249069266] [2020-07-21 22:20:29,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:20:29,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:29,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:20:29,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:20:29,627 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 22:20:30,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:30,092 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 22:20:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:20:30,092 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 22:20:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:30,096 INFO L225 Difference]: With dead ends: 91 [2020-07-21 22:20:30,096 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 22:20:30,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:20:30,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 22:20:30,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 22:20:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 22:20:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 22:20:30,111 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 22:20:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:30,112 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 22:20:30,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:20:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 22:20:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 22:20:30,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:30,116 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:30,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:30,330 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:30,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:30,331 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 22:20:30,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:30,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372936212] [2020-07-21 22:20:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:30,442 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:30,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:30,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:20:30,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 22:20:30,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:32,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:32,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:32,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:32,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:33,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:33,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:33,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:33,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 22:20:33,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372936212] [2020-07-21 22:20:33,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:33,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:20:33,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774368179] [2020-07-21 22:20:33,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:20:33,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:33,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:20:33,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:20:33,269 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 19 states. [2020-07-21 22:20:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:33,623 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 22:20:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:20:33,624 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 201 [2020-07-21 22:20:33,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:33,626 INFO L225 Difference]: With dead ends: 96 [2020-07-21 22:20:33,627 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 22:20:33,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:20:33,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 22:20:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 22:20:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 22:20:33,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 22:20:33,640 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 22:20:33,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:33,641 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 22:20:33,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:20:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 22:20:33,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 22:20:33,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:33,651 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:33,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:33,866 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:33,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:33,867 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 22:20:33,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:33,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247699834] [2020-07-21 22:20:33,868 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:34,017 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:34,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:34,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:20:34,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 22:20:34,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:36,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:36,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:38,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:38,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 22:20:38,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247699834] [2020-07-21 22:20:38,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:38,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:20:38,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7268702] [2020-07-21 22:20:38,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:20:38,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:38,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:20:38,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:20:38,336 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 21 states. [2020-07-21 22:20:38,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:38,922 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 22:20:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:20:38,924 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 351 [2020-07-21 22:20:38,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:38,930 INFO L225 Difference]: With dead ends: 101 [2020-07-21 22:20:38,930 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 22:20:38,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:20:38,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 22:20:38,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 22:20:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:20:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 22:20:38,956 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 22:20:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:38,957 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 22:20:38,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:20:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 22:20:38,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-07-21 22:20:38,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:38,963 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 19, 17, 17, 13, 13, 13, 13, 13, 13, 13, 13, 11, 8, 8, 8, 8, 8, 8, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:39,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:39,176 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:39,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1494010988, now seen corresponding path program 3 times [2020-07-21 22:20:39,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:39,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468702643] [2020-07-21 22:20:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:39,335 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:39,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:39,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:20:39,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 533 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-21 22:20:39,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:41,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:41,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:41,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:41,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:42,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:42,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:42,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:42,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:42,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:42,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 554 refuted. 0 times theorem prover too weak. 1839 trivial. 0 not checked. [2020-07-21 22:20:42,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468702643] [2020-07-21 22:20:42,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:42,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:20:42,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093850161] [2020-07-21 22:20:42,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:20:42,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:42,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:20:42,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:20:42,833 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 19 states. [2020-07-21 22:20:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:43,308 INFO L93 Difference]: Finished difference Result 129 states and 362 transitions. [2020-07-21 22:20:43,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:20:43,309 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 297 [2020-07-21 22:20:43,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:43,315 INFO L225 Difference]: With dead ends: 129 [2020-07-21 22:20:43,315 INFO L226 Difference]: Without dead ends: 125 [2020-07-21 22:20:43,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:20:43,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-21 22:20:43,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 67. [2020-07-21 22:20:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 22:20:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 120 transitions. [2020-07-21 22:20:43,353 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 120 transitions. Word has length 297 [2020-07-21 22:20:43,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:43,356 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 120 transitions. [2020-07-21 22:20:43,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:20:43,357 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 120 transitions. [2020-07-21 22:20:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-21 22:20:43,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:43,361 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 25, 25, 25, 23, 17, 17, 17, 17, 17, 17, 17, 12, 12, 12, 12, 12, 12, 12, 11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:43,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:43,577 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:43,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:43,577 INFO L82 PathProgramCache]: Analyzing trace with hash -948476032, now seen corresponding path program 1 times [2020-07-21 22:20:43,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:43,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396373991] [2020-07-21 22:20:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:43,782 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:43,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:43,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:20:43,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 707 refuted. 0 times theorem prover too weak. 3930 trivial. 0 not checked. [2020-07-21 22:20:44,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:45,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:46,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:46,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:46,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:46,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:46,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 723 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2020-07-21 22:20:46,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396373991] [2020-07-21 22:20:46,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:46,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:20:46,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307736079] [2020-07-21 22:20:46,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:20:46,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:46,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:20:46,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:20:46,811 INFO L87 Difference]: Start difference. First operand 67 states and 120 transitions. Second operand 17 states. [2020-07-21 22:20:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:47,309 INFO L93 Difference]: Finished difference Result 139 states and 413 transitions. [2020-07-21 22:20:47,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:20:47,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 409 [2020-07-21 22:20:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:47,315 INFO L225 Difference]: With dead ends: 139 [2020-07-21 22:20:47,316 INFO L226 Difference]: Without dead ends: 135 [2020-07-21 22:20:47,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 790 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:20:47,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-21 22:20:47,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 69. [2020-07-21 22:20:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 22:20:47,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 127 transitions. [2020-07-21 22:20:47,342 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 127 transitions. Word has length 409 [2020-07-21 22:20:47,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:47,343 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 127 transitions. [2020-07-21 22:20:47,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:20:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 127 transitions. [2020-07-21 22:20:47,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-07-21 22:20:47,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:47,349 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 33, 33, 32, 30, 22, 22, 22, 22, 22, 22, 22, 16, 16, 16, 16, 16, 16, 16, 14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:47,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:47,565 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:47,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:47,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1385064961, now seen corresponding path program 1 times [2020-07-21 22:20:47,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:47,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238522202] [2020-07-21 22:20:47,567 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:47,797 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:47,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:47,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:20:47,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 323 proven. 1219 refuted. 0 times theorem prover too weak. 6689 trivial. 0 not checked. [2020-07-21 22:20:48,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:50,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:52,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:52,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:52,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:52,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:52,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:52,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:52,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 327 proven. 1245 refuted. 0 times theorem prover too weak. 6659 trivial. 0 not checked. [2020-07-21 22:20:53,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238522202] [2020-07-21 22:20:53,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:53,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:20:53,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804937531] [2020-07-21 22:20:53,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:20:53,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:53,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:20:53,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:20:53,088 INFO L87 Difference]: Start difference. First operand 69 states and 127 transitions. Second operand 21 states. [2020-07-21 22:20:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:53,824 INFO L93 Difference]: Finished difference Result 166 states and 566 transitions. [2020-07-21 22:20:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:20:53,825 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 531 [2020-07-21 22:20:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:53,829 INFO L225 Difference]: With dead ends: 166 [2020-07-21 22:20:53,829 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 22:20:53,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 1025 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:20:53,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 22:20:53,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-07-21 22:20:53,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-21 22:20:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 146 transitions. [2020-07-21 22:20:53,848 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 146 transitions. Word has length 531 [2020-07-21 22:20:53,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:53,849 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 146 transitions. [2020-07-21 22:20:53,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:20:53,850 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 146 transitions. [2020-07-21 22:20:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 22:20:53,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:53,857 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 28, 26, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 11, 10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:54,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:54,072 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:54,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:54,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2146290224, now seen corresponding path program 2 times [2020-07-21 22:20:54,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:54,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390757614] [2020-07-21 22:20:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:54,324 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:54,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:54,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:20:54,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7475 backedges. 270 proven. 993 refuted. 0 times theorem prover too weak. 6212 trivial. 0 not checked. [2020-07-21 22:20:54,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:56,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:56,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:57,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:57,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:57,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:58,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:58,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:58,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:58,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7475 backedges. 270 proven. 1014 refuted. 0 times theorem prover too weak. 6191 trivial. 0 not checked. [2020-07-21 22:20:58,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390757614] [2020-07-21 22:20:58,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:58,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:20:58,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644414617] [2020-07-21 22:20:58,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:20:58,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:58,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:20:58,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:20:58,482 INFO L87 Difference]: Start difference. First operand 88 states and 146 transitions. Second operand 19 states. [2020-07-21 22:20:58,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:58,984 INFO L93 Difference]: Finished difference Result 167 states and 414 transitions. [2020-07-21 22:20:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:20:58,986 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 511 [2020-07-21 22:20:58,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:58,991 INFO L225 Difference]: With dead ends: 167 [2020-07-21 22:20:58,991 INFO L226 Difference]: Without dead ends: 153 [2020-07-21 22:20:58,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 989 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:20:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-21 22:20:59,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 94. [2020-07-21 22:20:59,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 22:20:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 160 transitions. [2020-07-21 22:20:59,012 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 160 transitions. Word has length 511 [2020-07-21 22:20:59,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:59,013 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 160 transitions. [2020-07-21 22:20:59,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:20:59,014 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 160 transitions. [2020-07-21 22:20:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2020-07-21 22:20:59,018 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:59,018 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 25, 25, 21, 21, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:59,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:59,234 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:59,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:59,235 INFO L82 PathProgramCache]: Analyzing trace with hash 66148448, now seen corresponding path program 3 times [2020-07-21 22:20:59,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:59,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936159315] [2020-07-21 22:20:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:59,487 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:59,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:59,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:20:59,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4044 backedges. 200 proven. 597 refuted. 0 times theorem prover too weak. 3247 trivial. 0 not checked. [2020-07-21 22:20:59,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:01,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:01,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:01,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:02,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:02,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:02,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:02,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:02,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:02,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4044 backedges. 200 proven. 613 refuted. 0 times theorem prover too weak. 3231 trivial. 0 not checked. [2020-07-21 22:21:02,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936159315] [2020-07-21 22:21:02,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:02,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:21:02,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117223760] [2020-07-21 22:21:02,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:21:02,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:02,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:21:02,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:21:02,390 INFO L87 Difference]: Start difference. First operand 94 states and 160 transitions. Second operand 17 states. [2020-07-21 22:21:02,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:02,774 INFO L93 Difference]: Finished difference Result 173 states and 423 transitions. [2020-07-21 22:21:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:02,775 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 379 [2020-07-21 22:21:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:02,782 INFO L225 Difference]: With dead ends: 173 [2020-07-21 22:21:02,782 INFO L226 Difference]: Without dead ends: 158 [2020-07-21 22:21:02,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 729 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:21:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-21 22:21:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 101. [2020-07-21 22:21:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-21 22:21:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 180 transitions. [2020-07-21 22:21:02,804 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 180 transitions. Word has length 379 [2020-07-21 22:21:02,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:02,805 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 180 transitions. [2020-07-21 22:21:02,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:21:02,806 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 180 transitions. [2020-07-21 22:21:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-07-21 22:21:02,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:02,811 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 26, 26, 21, 19, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 13, 10, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:03,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:03,026 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:03,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:03,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1659960505, now seen corresponding path program 4 times [2020-07-21 22:21:03,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:03,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428507439] [2020-07-21 22:21:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:03,325 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:03,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:03,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:21:03,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4273 backedges. 230 proven. 703 refuted. 0 times theorem prover too weak. 3340 trivial. 0 not checked. [2020-07-21 22:21:03,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:05,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:05,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:06,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:06,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:06,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:06,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:06,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:07,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:07,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4273 backedges. 232 proven. 722 refuted. 0 times theorem prover too weak. 3319 trivial. 0 not checked. [2020-07-21 22:21:07,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428507439] [2020-07-21 22:21:07,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:07,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:21:07,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212136656] [2020-07-21 22:21:07,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:21:07,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:07,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:21:07,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:21:07,228 INFO L87 Difference]: Start difference. First operand 101 states and 180 transitions. Second operand 19 states. [2020-07-21 22:21:07,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:07,571 INFO L93 Difference]: Finished difference Result 162 states and 374 transitions. [2020-07-21 22:21:07,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:21:07,572 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 389 [2020-07-21 22:21:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:07,576 INFO L225 Difference]: With dead ends: 162 [2020-07-21 22:21:07,577 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 22:21:07,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 745 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:21:07,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 22:21:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 99. [2020-07-21 22:21:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-21 22:21:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 173 transitions. [2020-07-21 22:21:07,593 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 173 transitions. Word has length 389 [2020-07-21 22:21:07,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:07,594 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 173 transitions. [2020-07-21 22:21:07,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:21:07,594 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 173 transitions. [2020-07-21 22:21:07,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 22:21:07,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:07,599 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 29, 26, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 12, 10, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:07,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:07,813 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:07,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2106460354, now seen corresponding path program 5 times [2020-07-21 22:21:07,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:07,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390742783] [2020-07-21 22:21:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:08,117 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:08,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:08,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:21:08,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6819 backedges. 310 proven. 1084 refuted. 0 times theorem prover too weak. 5425 trivial. 0 not checked. [2020-07-21 22:21:08,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:11,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:11,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:13,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:13,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:13,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:13,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:13,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6819 backedges. 312 proven. 1112 refuted. 0 times theorem prover too weak. 5395 trivial. 0 not checked. [2020-07-21 22:21:13,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390742783] [2020-07-21 22:21:13,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:13,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:21:13,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511542397] [2020-07-21 22:21:13,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:21:13,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:13,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:21:13,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:21:13,581 INFO L87 Difference]: Start difference. First operand 99 states and 173 transitions. Second operand 21 states. [2020-07-21 22:21:14,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:14,497 INFO L93 Difference]: Finished difference Result 211 states and 568 transitions. [2020-07-21 22:21:14,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:21:14,504 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 488 [2020-07-21 22:21:14,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:14,507 INFO L225 Difference]: With dead ends: 211 [2020-07-21 22:21:14,507 INFO L226 Difference]: Without dead ends: 115 [2020-07-21 22:21:14,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 939 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:21:14,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-21 22:21:14,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2020-07-21 22:21:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 22:21:14,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-21 22:21:14,532 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 488 [2020-07-21 22:21:14,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:14,533 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-21 22:21:14,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:21:14,533 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-21 22:21:14,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-07-21 22:21:14,538 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:14,539 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 27, 22, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 12, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:14,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:14,752 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:14,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:14,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1743261426, now seen corresponding path program 6 times [2020-07-21 22:21:14,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:14,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120511684] [2020-07-21 22:21:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:15,114 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:15,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:15,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:21:15,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 208 proven. 697 refuted. 0 times theorem prover too weak. 4429 trivial. 0 not checked. [2020-07-21 22:21:15,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:17,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:17,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:17,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 208 proven. 711 refuted. 0 times theorem prover too weak. 4415 trivial. 0 not checked. [2020-07-21 22:21:18,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120511684] [2020-07-21 22:21:18,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:18,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:21:18,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867272017] [2020-07-21 22:21:18,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:21:18,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:18,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:21:18,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:21:18,531 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-21 22:21:18,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:18,935 INFO L93 Difference]: Finished difference Result 190 states and 442 transitions. [2020-07-21 22:21:18,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:18,936 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 434 [2020-07-21 22:21:18,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:18,940 INFO L225 Difference]: With dead ends: 190 [2020-07-21 22:21:18,940 INFO L226 Difference]: Without dead ends: 178 [2020-07-21 22:21:18,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 839 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:21:18,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-21 22:21:18,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 109. [2020-07-21 22:21:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 22:21:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-21 22:21:18,965 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 434 [2020-07-21 22:21:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:18,966 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-21 22:21:18,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:21:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-21 22:21:18,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2020-07-21 22:21:18,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:18,973 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 38, 38, 35, 30, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 16, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:19,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:19,189 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:19,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1228494058, now seen corresponding path program 7 times [2020-07-21 22:21:19,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:19,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30602253] [2020-07-21 22:21:19,192 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:19,562 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:19,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:19,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:21:19,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8566 backedges. 414 proven. 1045 refuted. 0 times theorem prover too weak. 7107 trivial. 0 not checked. [2020-07-21 22:21:19,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:23,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:23,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:24,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:24,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:24,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:24,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:24,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:24,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:24,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:24,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8566 backedges. 413 proven. 1067 refuted. 0 times theorem prover too weak. 7086 trivial. 0 not checked. [2020-07-21 22:21:24,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30602253] [2020-07-21 22:21:24,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:24,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 22:21:24,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285860088] [2020-07-21 22:21:24,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:21:24,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:21:24,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:21:24,952 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 21 states. [2020-07-21 22:21:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:25,454 INFO L93 Difference]: Finished difference Result 173 states and 381 transitions. [2020-07-21 22:21:25,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:21:25,456 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 546 [2020-07-21 22:21:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:25,459 INFO L225 Difference]: With dead ends: 173 [2020-07-21 22:21:25,460 INFO L226 Difference]: Without dead ends: 145 [2020-07-21 22:21:25,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1098 GetRequests, 1057 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:21:25,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-21 22:21:25,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-07-21 22:21:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-21 22:21:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 300 transitions. [2020-07-21 22:21:25,481 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 300 transitions. Word has length 546 [2020-07-21 22:21:25,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:25,482 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 300 transitions. [2020-07-21 22:21:25,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:21:25,482 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 300 transitions. [2020-07-21 22:21:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2020-07-21 22:21:25,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:25,489 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 37, 37, 31, 26, 21, 21, 21, 21, 21, 21, 21, 18, 18, 18, 18, 18, 18, 18, 16, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:25,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:25,703 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:25,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:25,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2064724342, now seen corresponding path program 8 times [2020-07-21 22:21:25,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:25,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744840053] [2020-07-21 22:21:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:26,114 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:26,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:26,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:21:26,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8350 backedges. 330 proven. 1027 refuted. 0 times theorem prover too weak. 6993 trivial. 0 not checked. [2020-07-21 22:21:26,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:29,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:29,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:29,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:29,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:30,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:30,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:30,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:30,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:30,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:30,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:30,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:30,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8350 backedges. 338 proven. 1042 refuted. 0 times theorem prover too weak. 6970 trivial. 0 not checked. [2020-07-21 22:21:31,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744840053] [2020-07-21 22:21:31,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:31,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 22:21:31,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604558786] [2020-07-21 22:21:31,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:21:31,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:31,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:21:31,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:21:31,200 INFO L87 Difference]: Start difference. First operand 145 states and 300 transitions. Second operand 20 states. [2020-07-21 22:21:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:31,879 INFO L93 Difference]: Finished difference Result 291 states and 776 transitions. [2020-07-21 22:21:31,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:21:31,881 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 538 [2020-07-21 22:21:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:31,885 INFO L225 Difference]: With dead ends: 291 [2020-07-21 22:21:31,886 INFO L226 Difference]: Without dead ends: 200 [2020-07-21 22:21:31,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 1043 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:21:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-07-21 22:21:31,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 151. [2020-07-21 22:21:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-07-21 22:21:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 315 transitions. [2020-07-21 22:21:31,913 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 315 transitions. Word has length 538 [2020-07-21 22:21:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:31,914 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 315 transitions. [2020-07-21 22:21:31,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:21:31,914 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 315 transitions. [2020-07-21 22:21:31,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-07-21 22:21:31,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:31,921 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 25, 25, 22, 20, 16, 16, 16, 16, 16, 16, 16, 12, 12, 12, 12, 12, 12, 12, 12, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:32,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:32,177 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:32,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:32,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1721576607, now seen corresponding path program 9 times [2020-07-21 22:21:32,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:32,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431409459] [2020-07-21 22:21:32,180 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:32,527 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:32,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:32,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:21:32,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4349 backedges. 238 proven. 749 refuted. 0 times theorem prover too weak. 3362 trivial. 0 not checked. [2020-07-21 22:21:32,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:35,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:35,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:35,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:35,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:36,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:36,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:36,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:36,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:36,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4349 backedges. 239 proven. 769 refuted. 0 times theorem prover too weak. 3341 trivial. 0 not checked. [2020-07-21 22:21:37,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431409459] [2020-07-21 22:21:37,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:37,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 22:21:37,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365328532] [2020-07-21 22:21:37,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:21:37,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:37,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:21:37,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:21:37,399 INFO L87 Difference]: Start difference. First operand 151 states and 315 transitions. Second operand 21 states. [2020-07-21 22:21:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:38,190 INFO L93 Difference]: Finished difference Result 267 states and 671 transitions. [2020-07-21 22:21:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:21:38,192 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 391 [2020-07-21 22:21:38,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:38,198 INFO L225 Difference]: With dead ends: 267 [2020-07-21 22:21:38,199 INFO L226 Difference]: Without dead ends: 160 [2020-07-21 22:21:38,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 747 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:21:38,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-21 22:21:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 140. [2020-07-21 22:21:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-21 22:21:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 271 transitions. [2020-07-21 22:21:38,228 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 271 transitions. Word has length 391 [2020-07-21 22:21:38,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:38,228 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 271 transitions. [2020-07-21 22:21:38,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:21:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 271 transitions. [2020-07-21 22:21:38,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-07-21 22:21:38,235 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:38,236 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 27, 27, 22, 21, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 13, 9, 8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:38,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:38,451 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:38,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:38,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1740366261, now seen corresponding path program 10 times [2020-07-21 22:21:38,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:38,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073991747] [2020-07-21 22:21:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:38,864 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:38,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:38,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:21:38,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4317 backedges. 255 proven. 571 refuted. 0 times theorem prover too weak. 3491 trivial. 0 not checked. [2020-07-21 22:21:39,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:41,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:41,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:41,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:42,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:42,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:42,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:42,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:42,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4317 backedges. 257 proven. 585 refuted. 0 times theorem prover too weak. 3475 trivial. 0 not checked. [2020-07-21 22:21:42,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073991747] [2020-07-21 22:21:42,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:42,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:21:42,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552606511] [2020-07-21 22:21:42,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:21:42,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:42,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:21:42,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:21:42,599 INFO L87 Difference]: Start difference. First operand 140 states and 271 transitions. Second operand 17 states. [2020-07-21 22:21:42,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:42,998 INFO L93 Difference]: Finished difference Result 193 states and 418 transitions. [2020-07-21 22:21:42,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:42,999 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 392 [2020-07-21 22:21:43,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:43,003 INFO L225 Difference]: With dead ends: 193 [2020-07-21 22:21:43,003 INFO L226 Difference]: Without dead ends: 184 [2020-07-21 22:21:43,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 755 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:21:43,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-07-21 22:21:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 152. [2020-07-21 22:21:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-21 22:21:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 317 transitions. [2020-07-21 22:21:43,029 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 317 transitions. Word has length 392 [2020-07-21 22:21:43,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:43,029 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 317 transitions. [2020-07-21 22:21:43,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:21:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 317 transitions. [2020-07-21 22:21:43,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 22:21:43,036 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:43,037 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 32, 32, 28, 25, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 12, 11, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:43,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:43,251 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:43,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:43,252 INFO L82 PathProgramCache]: Analyzing trace with hash 164052198, now seen corresponding path program 11 times [2020-07-21 22:21:43,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:43,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7687947] [2020-07-21 22:21:43,252 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:43,637 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:43,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:43,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:21:43,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6790 backedges. 286 proven. 942 refuted. 0 times theorem prover too weak. 5562 trivial. 0 not checked. [2020-07-21 22:21:44,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:46,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:46,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:47,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:47,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:47,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:47,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:47,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:47,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:48,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:48,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6790 backedges. 290 proven. 961 refuted. 0 times theorem prover too weak. 5539 trivial. 0 not checked. [2020-07-21 22:21:48,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7687947] [2020-07-21 22:21:48,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:48,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:21:48,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960703560] [2020-07-21 22:21:48,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:21:48,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:48,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:21:48,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:21:48,338 INFO L87 Difference]: Start difference. First operand 152 states and 317 transitions. Second operand 19 states. [2020-07-21 22:21:48,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:48,806 INFO L93 Difference]: Finished difference Result 279 states and 705 transitions. [2020-07-21 22:21:48,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:21:48,807 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 486 [2020-07-21 22:21:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:48,811 INFO L225 Difference]: With dead ends: 279 [2020-07-21 22:21:48,811 INFO L226 Difference]: Without dead ends: 188 [2020-07-21 22:21:48,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 939 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:21:48,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-21 22:21:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 147. [2020-07-21 22:21:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 22:21:48,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 303 transitions. [2020-07-21 22:21:48,837 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 303 transitions. Word has length 486 [2020-07-21 22:21:48,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:48,838 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 303 transitions. [2020-07-21 22:21:48,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:21:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 303 transitions. [2020-07-21 22:21:48,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2020-07-21 22:21:48,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:48,845 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 22, 20, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:49,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:49,060 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:49,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:49,061 INFO L82 PathProgramCache]: Analyzing trace with hash -57186028, now seen corresponding path program 12 times [2020-07-21 22:21:49,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:49,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383838660] [2020-07-21 22:21:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:49,568 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:49,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:49,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:21:49,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4577 backedges. 297 proven. 730 refuted. 0 times theorem prover too weak. 3550 trivial. 0 not checked. [2020-07-21 22:21:49,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:52,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:52,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:53,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:53,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:53,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:53,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:54,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:54,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:54,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:54,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:54,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:54,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4577 backedges. 296 proven. 752 refuted. 0 times theorem prover too weak. 3529 trivial. 0 not checked. [2020-07-21 22:21:54,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383838660] [2020-07-21 22:21:54,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:54,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 22:21:54,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299736718] [2020-07-21 22:21:54,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:21:54,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:54,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:21:54,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:21:54,762 INFO L87 Difference]: Start difference. First operand 147 states and 303 transitions. Second operand 21 states. [2020-07-21 22:21:55,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:55,588 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-07-21 22:21:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:21:55,590 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 403 [2020-07-21 22:21:55,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:55,594 INFO L225 Difference]: With dead ends: 241 [2020-07-21 22:21:55,595 INFO L226 Difference]: Without dead ends: 150 [2020-07-21 22:21:55,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 771 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:21:55,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-21 22:21:55,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 128. [2020-07-21 22:21:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-21 22:21:55,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 239 transitions. [2020-07-21 22:21:55,623 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 239 transitions. Word has length 403 [2020-07-21 22:21:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:55,624 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 239 transitions. [2020-07-21 22:21:55,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:21:55,624 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 239 transitions. [2020-07-21 22:21:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-07-21 22:21:55,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:55,634 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 26, 26, 21, 20, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 13, 10, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:55,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:55,849 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:55,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:55,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1792603405, now seen corresponding path program 13 times [2020-07-21 22:21:55,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:55,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774091551] [2020-07-21 22:21:55,850 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:56,261 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:56,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:56,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:21:56,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4292 backedges. 304 proven. 632 refuted. 0 times theorem prover too weak. 3356 trivial. 0 not checked. [2020-07-21 22:21:56,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:58,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:58,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:59,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:59,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:59,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:00,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:00,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:00,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:00,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:00,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4292 backedges. 306 proven. 651 refuted. 0 times theorem prover too weak. 3335 trivial. 0 not checked. [2020-07-21 22:22:00,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774091551] [2020-07-21 22:22:00,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:00,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:22:00,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588610433] [2020-07-21 22:22:00,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:22:00,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:00,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:22:00,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:22:00,695 INFO L87 Difference]: Start difference. First operand 128 states and 239 transitions. Second operand 19 states. [2020-07-21 22:22:01,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:01,140 INFO L93 Difference]: Finished difference Result 171 states and 343 transitions. [2020-07-21 22:22:01,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:22:01,142 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 390 [2020-07-21 22:22:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:01,144 INFO L225 Difference]: With dead ends: 171 [2020-07-21 22:22:01,144 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 22:22:01,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 747 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:22:01,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 22:22:01,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 124. [2020-07-21 22:22:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-21 22:22:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 224 transitions. [2020-07-21 22:22:01,161 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 224 transitions. Word has length 390 [2020-07-21 22:22:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:01,162 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 224 transitions. [2020-07-21 22:22:01,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:22:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 224 transitions. [2020-07-21 22:22:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-07-21 22:22:01,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:01,166 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 20, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:01,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:01,381 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:01,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:01,381 INFO L82 PathProgramCache]: Analyzing trace with hash -650602361, now seen corresponding path program 14 times [2020-07-21 22:22:01,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:01,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395694705] [2020-07-21 22:22:01,382 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:01,849 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:22:01,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:01,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:22:01,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4307 backedges. 269 proven. 536 refuted. 0 times theorem prover too weak. 3502 trivial. 0 not checked. [2020-07-21 22:22:02,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:03,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:04,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:04,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:04,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:04,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:04,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:04,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:04,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:04,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4307 backedges. 269 proven. 552 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2020-07-21 22:22:05,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395694705] [2020-07-21 22:22:05,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:05,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:22:05,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62349512] [2020-07-21 22:22:05,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:22:05,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:05,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:22:05,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:22:05,238 INFO L87 Difference]: Start difference. First operand 124 states and 224 transitions. Second operand 17 states. [2020-07-21 22:22:05,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:05,664 INFO L93 Difference]: Finished difference Result 183 states and 374 transitions. [2020-07-21 22:22:05,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:22:05,666 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 392 [2020-07-21 22:22:05,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:05,669 INFO L225 Difference]: With dead ends: 183 [2020-07-21 22:22:05,670 INFO L226 Difference]: Without dead ends: 174 [2020-07-21 22:22:05,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 755 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:22:05,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-07-21 22:22:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 121. [2020-07-21 22:22:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 22:22:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 214 transitions. [2020-07-21 22:22:05,690 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 214 transitions. Word has length 392 [2020-07-21 22:22:05,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:05,690 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 214 transitions. [2020-07-21 22:22:05,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:22:05,691 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 214 transitions. [2020-07-21 22:22:05,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 22:22:05,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:05,695 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 32, 32, 28, 26, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:05,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:05,910 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:05,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:05,910 INFO L82 PathProgramCache]: Analyzing trace with hash -555807280, now seen corresponding path program 15 times [2020-07-21 22:22:05,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:05,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954038987] [2020-07-21 22:22:05,911 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:06,370 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:22:06,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:06,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:22:06,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6091 backedges. 271 proven. 566 refuted. 0 times theorem prover too weak. 5254 trivial. 0 not checked. [2020-07-21 22:22:06,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:08,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:08,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:08,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:09,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:09,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:09,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6091 backedges. 271 proven. 576 refuted. 0 times theorem prover too weak. 5244 trivial. 0 not checked. [2020-07-21 22:22:09,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954038987] [2020-07-21 22:22:09,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:09,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:22:09,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911311359] [2020-07-21 22:22:09,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:22:09,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:09,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:22:09,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:22:09,502 INFO L87 Difference]: Start difference. First operand 121 states and 214 transitions. Second operand 15 states. [2020-07-21 22:22:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:09,797 INFO L93 Difference]: Finished difference Result 165 states and 321 transitions. [2020-07-21 22:22:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:22:09,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 463 [2020-07-21 22:22:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:09,803 INFO L225 Difference]: With dead ends: 165 [2020-07-21 22:22:09,803 INFO L226 Difference]: Without dead ends: 156 [2020-07-21 22:22:09,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 901 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:22:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-21 22:22:09,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 121. [2020-07-21 22:22:09,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 22:22:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 214 transitions. [2020-07-21 22:22:09,820 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 214 transitions. Word has length 463 [2020-07-21 22:22:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:09,821 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 214 transitions. [2020-07-21 22:22:09,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:22:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 214 transitions. [2020-07-21 22:22:09,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-07-21 22:22:09,825 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:09,825 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 22, 20, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 10, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:10,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:10,041 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:10,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:10,042 INFO L82 PathProgramCache]: Analyzing trace with hash 431289426, now seen corresponding path program 16 times [2020-07-21 22:22:10,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:10,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731900561] [2020-07-21 22:22:10,043 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:10,517 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:22:10,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:10,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:22:10,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3505 backedges. 386 proven. 347 refuted. 0 times theorem prover too weak. 2772 trivial. 0 not checked. [2020-07-21 22:22:10,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:12,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:13,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:13,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:13,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3505 backedges. 388 proven. 361 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2020-07-21 22:22:13,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731900561] [2020-07-21 22:22:13,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:13,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:22:13,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604174030] [2020-07-21 22:22:13,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:22:13,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:13,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:22:13,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:22:13,647 INFO L87 Difference]: Start difference. First operand 121 states and 214 transitions. Second operand 17 states. [2020-07-21 22:22:13,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:13,960 INFO L93 Difference]: Finished difference Result 173 states and 365 transitions. [2020-07-21 22:22:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:22:13,961 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 355 [2020-07-21 22:22:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:13,965 INFO L225 Difference]: With dead ends: 173 [2020-07-21 22:22:13,965 INFO L226 Difference]: Without dead ends: 164 [2020-07-21 22:22:13,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 681 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:22:13,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-21 22:22:13,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 141. [2020-07-21 22:22:13,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-21 22:22:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 277 transitions. [2020-07-21 22:22:13,982 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 277 transitions. Word has length 355 [2020-07-21 22:22:13,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:13,983 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 277 transitions. [2020-07-21 22:22:13,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:22:13,983 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 277 transitions. [2020-07-21 22:22:13,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-07-21 22:22:13,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:13,988 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 24, 23, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:14,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:14,203 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:14,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:14,203 INFO L82 PathProgramCache]: Analyzing trace with hash 873192572, now seen corresponding path program 17 times [2020-07-21 22:22:14,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:14,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692244550] [2020-07-21 22:22:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:14,664 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:22:14,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:14,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:22:14,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5281 backedges. 466 proven. 584 refuted. 0 times theorem prover too weak. 4231 trivial. 0 not checked. [2020-07-21 22:22:15,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:18,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:18,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:18,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:19,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:19,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:19,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:19,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:19,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5281 backedges. 470 proven. 601 refuted. 0 times theorem prover too weak. 4210 trivial. 0 not checked. [2020-07-21 22:22:20,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692244550] [2020-07-21 22:22:20,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:20,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:22:20,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349803111] [2020-07-21 22:22:20,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:22:20,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:20,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:22:20,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:22:20,091 INFO L87 Difference]: Start difference. First operand 141 states and 277 transitions. Second operand 19 states. [2020-07-21 22:22:20,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:20,589 INFO L93 Difference]: Finished difference Result 184 states and 394 transitions. [2020-07-21 22:22:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:22:20,591 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 432 [2020-07-21 22:22:20,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:20,594 INFO L225 Difference]: With dead ends: 184 [2020-07-21 22:22:20,594 INFO L226 Difference]: Without dead ends: 175 [2020-07-21 22:22:20,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 831 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:22:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-21 22:22:20,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2020-07-21 22:22:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-21 22:22:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 275 transitions. [2020-07-21 22:22:20,616 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 275 transitions. Word has length 432 [2020-07-21 22:22:20,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:20,616 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 275 transitions. [2020-07-21 22:22:20,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:22:20,616 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 275 transitions. [2020-07-21 22:22:20,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2020-07-21 22:22:20,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:20,623 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 36, 36, 32, 29, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 14, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:20,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:20,836 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:20,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:20,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1824791267, now seen corresponding path program 18 times [2020-07-21 22:22:20,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:20,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884985717] [2020-07-21 22:22:20,838 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:21,332 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:22:21,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:21,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:22:21,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8074 backedges. 425 proven. 703 refuted. 0 times theorem prover too weak. 6946 trivial. 0 not checked. [2020-07-21 22:22:21,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:24,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:24,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:24,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:25,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:25,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:25,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:25,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:25,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:25,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8074 backedges. 427 proven. 715 refuted. 0 times theorem prover too weak. 6932 trivial. 0 not checked. [2020-07-21 22:22:25,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884985717] [2020-07-21 22:22:25,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:25,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:22:25,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839907629] [2020-07-21 22:22:25,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:22:25,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:25,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:22:25,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:22:25,927 INFO L87 Difference]: Start difference. First operand 145 states and 275 transitions. Second operand 17 states. [2020-07-21 22:22:26,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:26,354 INFO L93 Difference]: Finished difference Result 220 states and 491 transitions. [2020-07-21 22:22:26,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:22:26,356 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 530 [2020-07-21 22:22:26,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:26,360 INFO L225 Difference]: With dead ends: 220 [2020-07-21 22:22:26,360 INFO L226 Difference]: Without dead ends: 211 [2020-07-21 22:22:26,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1065 GetRequests, 1031 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:22:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-21 22:22:26,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 137. [2020-07-21 22:22:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-21 22:22:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 253 transitions. [2020-07-21 22:22:26,381 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 253 transitions. Word has length 530 [2020-07-21 22:22:26,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:26,382 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 253 transitions. [2020-07-21 22:22:26,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:22:26,382 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 253 transitions. [2020-07-21 22:22:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-21 22:22:26,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:26,387 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 26, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:26,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:26,601 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:26,602 INFO L82 PathProgramCache]: Analyzing trace with hash 803771790, now seen corresponding path program 19 times [2020-07-21 22:22:26,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:26,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863279058] [2020-07-21 22:22:26,603 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:27,142 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:22:27,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:27,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:22:27,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 629 proven. 589 refuted. 0 times theorem prover too weak. 4159 trivial. 0 not checked. [2020-07-21 22:22:27,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:30,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:31,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:32,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:32,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:32,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:32,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:32,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:32,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:32,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:33,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:33,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:33,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 629 proven. 619 refuted. 0 times theorem prover too weak. 4129 trivial. 0 not checked. [2020-07-21 22:22:33,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863279058] [2020-07-21 22:22:33,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:33,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:22:33,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165108633] [2020-07-21 22:22:33,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:22:33,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:33,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:22:33,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:22:33,776 INFO L87 Difference]: Start difference. First operand 137 states and 253 transitions. Second operand 21 states. [2020-07-21 22:22:34,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:34,308 INFO L93 Difference]: Finished difference Result 216 states and 438 transitions. [2020-07-21 22:22:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:22:34,310 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 436 [2020-07-21 22:22:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:34,314 INFO L225 Difference]: With dead ends: 216 [2020-07-21 22:22:34,314 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 22:22:34,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 879 GetRequests, 835 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:22:34,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 22:22:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 174. [2020-07-21 22:22:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-07-21 22:22:34,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 339 transitions. [2020-07-21 22:22:34,333 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 339 transitions. Word has length 436 [2020-07-21 22:22:34,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:34,333 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 339 transitions. [2020-07-21 22:22:34,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:22:34,333 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 339 transitions. [2020-07-21 22:22:34,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-21 22:22:34,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:34,337 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 26, 26, 23, 22, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 13, 10, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:34,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:34,538 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:34,538 INFO L82 PathProgramCache]: Analyzing trace with hash 407269797, now seen corresponding path program 20 times [2020-07-21 22:22:34,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:34,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369822793] [2020-07-21 22:22:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:35,035 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:22:35,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:35,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:22:35,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4376 backedges. 397 proven. 570 refuted. 0 times theorem prover too weak. 3409 trivial. 0 not checked. [2020-07-21 22:22:35,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:37,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:37,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:38,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:39,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:39,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:39,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:39,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:39,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:39,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:39,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4376 backedges. 401 proven. 587 refuted. 0 times theorem prover too weak. 3388 trivial. 0 not checked. [2020-07-21 22:22:40,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369822793] [2020-07-21 22:22:40,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:40,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:22:40,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220932288] [2020-07-21 22:22:40,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:22:40,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:40,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:22:40,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:22:40,265 INFO L87 Difference]: Start difference. First operand 174 states and 339 transitions. Second operand 19 states. [2020-07-21 22:22:41,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:41,088 INFO L93 Difference]: Finished difference Result 235 states and 481 transitions. [2020-07-21 22:22:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:22:41,090 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 394 [2020-07-21 22:22:41,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:41,094 INFO L225 Difference]: With dead ends: 235 [2020-07-21 22:22:41,094 INFO L226 Difference]: Without dead ends: 201 [2020-07-21 22:22:41,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 755 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:22:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-07-21 22:22:41,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 180. [2020-07-21 22:22:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-21 22:22:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 365 transitions. [2020-07-21 22:22:41,121 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 365 transitions. Word has length 394 [2020-07-21 22:22:41,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:41,121 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 365 transitions. [2020-07-21 22:22:41,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:22:41,122 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 365 transitions. [2020-07-21 22:22:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-07-21 22:22:41,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:41,128 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 24, 21, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:41,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:41,343 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:41,344 INFO L82 PathProgramCache]: Analyzing trace with hash 134800916, now seen corresponding path program 21 times [2020-07-21 22:22:41,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:41,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120521587] [2020-07-21 22:22:41,345 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:41,888 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:22:41,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:41,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:22:41,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4642 backedges. 293 proven. 545 refuted. 0 times theorem prover too weak. 3804 trivial. 0 not checked. [2020-07-21 22:22:42,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:44,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:44,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:45,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:45,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:45,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:45,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:45,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:45,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:45,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:46,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4642 backedges. 295 proven. 557 refuted. 0 times theorem prover too weak. 3790 trivial. 0 not checked. [2020-07-21 22:22:46,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120521587] [2020-07-21 22:22:46,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:46,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:22:46,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650171299] [2020-07-21 22:22:46,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:22:46,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:46,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:22:46,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:22:46,313 INFO L87 Difference]: Start difference. First operand 180 states and 365 transitions. Second operand 17 states. [2020-07-21 22:22:46,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:46,857 INFO L93 Difference]: Finished difference Result 232 states and 496 transitions. [2020-07-21 22:22:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:22:46,862 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 406 [2020-07-21 22:22:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:46,866 INFO L225 Difference]: With dead ends: 232 [2020-07-21 22:22:46,867 INFO L226 Difference]: Without dead ends: 223 [2020-07-21 22:22:46,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 783 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:22:46,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-21 22:22:46,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 180. [2020-07-21 22:22:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-21 22:22:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 365 transitions. [2020-07-21 22:22:46,895 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 365 transitions. Word has length 406 [2020-07-21 22:22:46,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:46,896 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 365 transitions. [2020-07-21 22:22:46,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:22:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 365 transitions. [2020-07-21 22:22:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-21 22:22:46,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:46,903 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:47,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:47,116 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:47,117 INFO L82 PathProgramCache]: Analyzing trace with hash 488517587, now seen corresponding path program 22 times [2020-07-21 22:22:47,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:47,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972137722] [2020-07-21 22:22:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:47,690 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:22:47,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:47,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:22:47,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 358 proven. 335 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2020-07-21 22:22:47,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:49,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:49,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:50,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:50,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:50,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:50,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:50,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:50,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:50,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:50,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 358 proven. 347 refuted. 0 times theorem prover too weak. 3643 trivial. 0 not checked. [2020-07-21 22:22:51,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972137722] [2020-07-21 22:22:51,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:51,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:22:51,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395678105] [2020-07-21 22:22:51,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:22:51,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:51,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:22:51,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:22:51,379 INFO L87 Difference]: Start difference. First operand 180 states and 365 transitions. Second operand 15 states. [2020-07-21 22:22:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:51,925 INFO L93 Difference]: Finished difference Result 272 states and 639 transitions. [2020-07-21 22:22:51,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:22:51,928 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 394 [2020-07-21 22:22:51,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:51,933 INFO L225 Difference]: With dead ends: 272 [2020-07-21 22:22:51,933 INFO L226 Difference]: Without dead ends: 263 [2020-07-21 22:22:51,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 763 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:22:51,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-07-21 22:22:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 180. [2020-07-21 22:22:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-21 22:22:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 365 transitions. [2020-07-21 22:22:51,962 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 365 transitions. Word has length 394 [2020-07-21 22:22:51,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:51,963 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 365 transitions. [2020-07-21 22:22:51,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:22:51,963 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 365 transitions. [2020-07-21 22:22:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-07-21 22:22:51,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:51,970 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 25, 23, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:52,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:52,185 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:52,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:52,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1080223758, now seen corresponding path program 23 times [2020-07-21 22:22:52,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:52,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032507962] [2020-07-21 22:22:52,187 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 [2020-07-21 22:22:52,774 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:22:52,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:52,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:22:52,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5297 backedges. 569 proven. 495 refuted. 0 times theorem prover too weak. 4233 trivial. 0 not checked. [2020-07-21 22:22:53,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:55,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:56,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:56,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:56,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:56,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:57,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:57,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:57,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:57,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:57,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:57,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:57,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:57,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5297 backedges. 569 proven. 518 refuted. 0 times theorem prover too weak. 4210 trivial. 0 not checked. [2020-07-21 22:22:57,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032507962] [2020-07-21 22:22:57,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:57,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:22:57,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078973090] [2020-07-21 22:22:57,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:22:57,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:57,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:22:57,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:22:57,886 INFO L87 Difference]: Start difference. First operand 180 states and 365 transitions. Second operand 19 states. [2020-07-21 22:22:58,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:58,435 INFO L93 Difference]: Finished difference Result 253 states and 544 transitions. [2020-07-21 22:22:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:22:58,437 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 433 [2020-07-21 22:22:58,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:58,441 INFO L225 Difference]: With dead ends: 253 [2020-07-21 22:22:58,442 INFO L226 Difference]: Without dead ends: 235 [2020-07-21 22:22:58,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 833 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:22:58,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-07-21 22:22:58,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 180. [2020-07-21 22:22:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-21 22:22:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 365 transitions. [2020-07-21 22:22:58,467 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 365 transitions. Word has length 433 [2020-07-21 22:22:58,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:58,468 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 365 transitions. [2020-07-21 22:22:58,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:22:58,468 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 365 transitions. [2020-07-21 22:22:58,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-07-21 22:22:58,474 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:58,475 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 23, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:58,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:58,689 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:58,690 INFO L82 PathProgramCache]: Analyzing trace with hash 502386486, now seen corresponding path program 24 times [2020-07-21 22:22:58,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:58,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785163023] [2020-07-21 22:22:58,691 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 [2020-07-21 22:22:59,289 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:22:59,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:59,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:22:59,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4654 backedges. 432 proven. 409 refuted. 0 times theorem prover too weak. 3813 trivial. 0 not checked. [2020-07-21 22:22:59,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:01,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:01,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:02,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:02,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:02,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:02,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:03,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:03,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:03,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:03,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:03,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4654 backedges. 432 proven. 425 refuted. 0 times theorem prover too weak. 3797 trivial. 0 not checked. [2020-07-21 22:23:04,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785163023] [2020-07-21 22:23:04,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:04,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:23:04,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411994804] [2020-07-21 22:23:04,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:23:04,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:04,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:23:04,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:23:04,151 INFO L87 Difference]: Start difference. First operand 180 states and 365 transitions. Second operand 17 states. [2020-07-21 22:23:04,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:04,632 INFO L93 Difference]: Finished difference Result 246 states and 534 transitions. [2020-07-21 22:23:04,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:23:04,635 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 407 [2020-07-21 22:23:04,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:04,639 INFO L225 Difference]: With dead ends: 246 [2020-07-21 22:23:04,639 INFO L226 Difference]: Without dead ends: 237 [2020-07-21 22:23:04,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 785 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:23:04,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-07-21 22:23:04,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 177. [2020-07-21 22:23:04,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-21 22:23:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 355 transitions. [2020-07-21 22:23:04,666 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 355 transitions. Word has length 407 [2020-07-21 22:23:04,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:04,667 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 355 transitions. [2020-07-21 22:23:04,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:23:04,667 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 355 transitions. [2020-07-21 22:23:04,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2020-07-21 22:23:04,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:04,674 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 32, 29, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 13, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:04,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:04,890 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:04,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:04,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1318187364, now seen corresponding path program 25 times [2020-07-21 22:23:04,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:04,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241560099] [2020-07-21 22:23:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 22:23:05,542 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:23:05,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:05,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:23:05,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8430 backedges. 411 proven. 547 refuted. 0 times theorem prover too weak. 7472 trivial. 0 not checked. [2020-07-21 22:23:05,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:08,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:08,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:09,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:09,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:09,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:09,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:09,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:09,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:09,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:10,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8430 backedges. 411 proven. 557 refuted. 0 times theorem prover too weak. 7462 trivial. 0 not checked. [2020-07-21 22:23:10,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241560099] [2020-07-21 22:23:10,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:10,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:23:10,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912661883] [2020-07-21 22:23:10,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:23:10,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:10,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:23:10,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:23:10,822 INFO L87 Difference]: Start difference. First operand 177 states and 355 transitions. Second operand 15 states. [2020-07-21 22:23:11,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:11,289 INFO L93 Difference]: Finished difference Result 221 states and 462 transitions. [2020-07-21 22:23:11,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:23:11,292 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 542 [2020-07-21 22:23:11,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:11,296 INFO L225 Difference]: With dead ends: 221 [2020-07-21 22:23:11,296 INFO L226 Difference]: Without dead ends: 212 [2020-07-21 22:23:11,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1088 GetRequests, 1059 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:23:11,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-07-21 22:23:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 180. [2020-07-21 22:23:11,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-21 22:23:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 369 transitions. [2020-07-21 22:23:11,317 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 369 transitions. Word has length 542 [2020-07-21 22:23:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:11,318 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 369 transitions. [2020-07-21 22:23:11,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:23:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 369 transitions. [2020-07-21 22:23:11,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-07-21 22:23:11,324 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:11,325 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 25, 24, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:11,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:11,526 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:11,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:11,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1907843532, now seen corresponding path program 26 times [2020-07-21 22:23:11,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:11,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798531864] [2020-07-21 22:23:11,528 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 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:12,150 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:23:12,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:12,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:23:12,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4724 backedges. 661 proven. 209 refuted. 0 times theorem prover too weak. 3854 trivial. 0 not checked. [2020-07-21 22:23:12,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:14,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:14,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:15,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:15,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:15,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:15,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:15,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:15,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4724 backedges. 665 proven. 221 refuted. 0 times theorem prover too weak. 3838 trivial. 0 not checked. [2020-07-21 22:23:16,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798531864] [2020-07-21 22:23:16,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:16,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:23:16,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630186200] [2020-07-21 22:23:16,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:23:16,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:16,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:23:16,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:23:16,729 INFO L87 Difference]: Start difference. First operand 180 states and 369 transitions. Second operand 17 states. [2020-07-21 22:23:17,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:17,081 INFO L93 Difference]: Finished difference Result 259 states and 627 transitions. [2020-07-21 22:23:17,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:23:17,082 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 410 [2020-07-21 22:23:17,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:17,087 INFO L225 Difference]: With dead ends: 259 [2020-07-21 22:23:17,087 INFO L226 Difference]: Without dead ends: 244 [2020-07-21 22:23:17,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 791 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:23:17,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-07-21 22:23:17,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 213. [2020-07-21 22:23:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-07-21 22:23:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 484 transitions. [2020-07-21 22:23:17,116 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 484 transitions. Word has length 410 [2020-07-21 22:23:17,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:17,117 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 484 transitions. [2020-07-21 22:23:17,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:23:17,117 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 484 transitions. [2020-07-21 22:23:17,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-07-21 22:23:17,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:17,125 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 25, 24, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:17,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:17,341 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:17,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:17,341 INFO L82 PathProgramCache]: Analyzing trace with hash 808947026, now seen corresponding path program 27 times [2020-07-21 22:23:17,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:17,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969905465] [2020-07-21 22:23:17,342 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 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:17,976 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:23:17,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:17,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:23:17,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 479 proven. 424 refuted. 0 times theorem prover too weak. 4425 trivial. 0 not checked. [2020-07-21 22:23:18,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:20,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:21,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:21,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:21,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:22,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:22,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:22,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:22,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:22,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:22,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 483 proven. 434 refuted. 0 times theorem prover too weak. 4411 trivial. 0 not checked. [2020-07-21 22:23:23,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969905465] [2020-07-21 22:23:23,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:23,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:23:23,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661409061] [2020-07-21 22:23:23,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:23:23,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:23,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:23:23,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:23:23,148 INFO L87 Difference]: Start difference. First operand 213 states and 484 transitions. Second operand 17 states. [2020-07-21 22:23:23,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:23,727 INFO L93 Difference]: Finished difference Result 252 states and 573 transitions. [2020-07-21 22:23:23,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:23:23,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 434 [2020-07-21 22:23:23,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:23,736 INFO L225 Difference]: With dead ends: 252 [2020-07-21 22:23:23,737 INFO L226 Difference]: Without dead ends: 243 [2020-07-21 22:23:23,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 839 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:23:23,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-21 22:23:23,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 207. [2020-07-21 22:23:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-07-21 22:23:23,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 462 transitions. [2020-07-21 22:23:23,767 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 462 transitions. Word has length 434 [2020-07-21 22:23:23,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:23,767 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 462 transitions. [2020-07-21 22:23:23,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:23:23,767 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 462 transitions. [2020-07-21 22:23:23,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 22:23:23,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:23,775 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 30, 30, 25, 24, 20, 20, 20, 20, 20, 20, 20, 16, 15, 15, 15, 15, 15, 15, 15, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:23,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:23,985 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:23,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:23,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1349532802, now seen corresponding path program 28 times [2020-07-21 22:23:23,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:23,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470613154] [2020-07-21 22:23:23,987 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:24,621 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:23:24,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:24,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:23:24,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6776 backedges. 388 proven. 708 refuted. 0 times theorem prover too weak. 5680 trivial. 0 not checked. [2020-07-21 22:23:25,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:28,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:29,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:29,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:30,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:30,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:30,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:30,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:30,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:30,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:31,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6776 backedges. 390 proven. 720 refuted. 0 times theorem prover too weak. 5666 trivial. 0 not checked. [2020-07-21 22:23:31,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470613154] [2020-07-21 22:23:31,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:31,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 22:23:31,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432965153] [2020-07-21 22:23:31,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:23:31,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:31,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:23:31,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:23:31,542 INFO L87 Difference]: Start difference. First operand 207 states and 462 transitions. Second operand 19 states. [2020-07-21 22:23:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:32,255 INFO L93 Difference]: Finished difference Result 271 states and 611 transitions. [2020-07-21 22:23:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:23:32,258 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 482 [2020-07-21 22:23:32,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:32,263 INFO L225 Difference]: With dead ends: 271 [2020-07-21 22:23:32,263 INFO L226 Difference]: Without dead ends: 237 [2020-07-21 22:23:32,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 933 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:23:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-07-21 22:23:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 213. [2020-07-21 22:23:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-07-21 22:23:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2020-07-21 22:23:32,286 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 482 [2020-07-21 22:23:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:32,287 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2020-07-21 22:23:32,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:23:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2020-07-21 22:23:32,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-07-21 22:23:32,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:32,292 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 28, 28, 23, 23, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 10, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:32,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:32,493 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:32,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:32,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1875820497, now seen corresponding path program 29 times [2020-07-21 22:23:32,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:32,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622792372] [2020-07-21 22:23:32,495 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 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:33,157 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:23:33,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:33,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:23:33,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4974 backedges. 556 proven. 381 refuted. 0 times theorem prover too weak. 4037 trivial. 0 not checked. [2020-07-21 22:23:33,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:36,694 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-07-21 22:23:36,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:36,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:37,247 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 22:23:37,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:38,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:38,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:38,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:38,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:39,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4974 backedges. 556 proven. 395 refuted. 0 times theorem prover too weak. 4023 trivial. 0 not checked. [2020-07-21 22:23:39,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622792372] [2020-07-21 22:23:39,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:39,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 22:23:39,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787577071] [2020-07-21 22:23:39,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:23:39,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:39,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:23:39,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:23:39,811 INFO L87 Difference]: Start difference. First operand 213 states and 480 transitions. Second operand 19 states. [2020-07-21 22:23:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:40,636 INFO L93 Difference]: Finished difference Result 248 states and 555 transitions. [2020-07-21 22:23:40,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:23:40,640 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 419 [2020-07-21 22:23:40,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:40,644 INFO L225 Difference]: With dead ends: 248 [2020-07-21 22:23:40,645 INFO L226 Difference]: Without dead ends: 230 [2020-07-21 22:23:40,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 807 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:23:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-21 22:23:40,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2020-07-21 22:23:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 22:23:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 499 transitions. [2020-07-21 22:23:40,671 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 499 transitions. Word has length 419 [2020-07-21 22:23:40,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:40,672 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 499 transitions. [2020-07-21 22:23:40,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:23:40,672 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 499 transitions. [2020-07-21 22:23:40,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-07-21 22:23:40,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:40,682 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 24, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 9, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:40,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:40,895 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:40,896 INFO L82 PathProgramCache]: Analyzing trace with hash 99192718, now seen corresponding path program 30 times [2020-07-21 22:23:40,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:40,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034996933] [2020-07-21 22:23:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:41,569 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:23:41,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:41,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:23:41,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4685 backedges. 469 proven. 391 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2020-07-21 22:23:41,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:44,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:44,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:44,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:44,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:44,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:44,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:44,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:44,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:44,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:44,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:45,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:45,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:45,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4685 backedges. 473 proven. 403 refuted. 0 times theorem prover too weak. 3809 trivial. 0 not checked. [2020-07-21 22:23:45,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034996933] [2020-07-21 22:23:45,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:45,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:23:45,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488713273] [2020-07-21 22:23:45,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:23:45,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:45,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:23:45,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:23:45,793 INFO L87 Difference]: Start difference. First operand 221 states and 499 transitions. Second operand 17 states. [2020-07-21 22:23:46,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:46,240 INFO L93 Difference]: Finished difference Result 321 states and 776 transitions. [2020-07-21 22:23:46,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:23:46,242 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 408 [2020-07-21 22:23:46,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:46,249 INFO L225 Difference]: With dead ends: 321 [2020-07-21 22:23:46,249 INFO L226 Difference]: Without dead ends: 303 [2020-07-21 22:23:46,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 787 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:23:46,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-07-21 22:23:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 215. [2020-07-21 22:23:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-07-21 22:23:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 467 transitions. [2020-07-21 22:23:46,281 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 467 transitions. Word has length 408 [2020-07-21 22:23:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:46,282 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 467 transitions. [2020-07-21 22:23:46,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:23:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 467 transitions. [2020-07-21 22:23:46,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-07-21 22:23:46,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:46,287 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 23, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:46,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:46,488 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:46,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:46,489 INFO L82 PathProgramCache]: Analyzing trace with hash -142621718, now seen corresponding path program 31 times [2020-07-21 22:23:46,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:46,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396039988] [2020-07-21 22:23:46,490 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:47,209 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:23:47,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:47,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:23:47,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 761 proven. 220 refuted. 0 times theorem prover too weak. 3681 trivial. 0 not checked. [2020-07-21 22:23:47,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:50,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:50,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:51,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:51,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:51,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:51,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:51,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:51,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:52,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:52,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 765 proven. 237 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2020-07-21 22:23:53,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396039988] [2020-07-21 22:23:53,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:53,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:23:53,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333416342] [2020-07-21 22:23:53,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:23:53,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:53,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:23:53,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:23:53,987 INFO L87 Difference]: Start difference. First operand 215 states and 467 transitions. Second operand 19 states. [2020-07-21 22:23:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:54,858 INFO L93 Difference]: Finished difference Result 284 states and 672 transitions. [2020-07-21 22:23:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:23:54,862 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 407 [2020-07-21 22:23:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:54,868 INFO L225 Difference]: With dead ends: 284 [2020-07-21 22:23:54,868 INFO L226 Difference]: Without dead ends: 269 [2020-07-21 22:23:54,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 781 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:23:54,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-07-21 22:23:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 230. [2020-07-21 22:23:54,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-07-21 22:23:54,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 504 transitions. [2020-07-21 22:23:54,904 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 504 transitions. Word has length 407 [2020-07-21 22:23:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:54,905 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 504 transitions. [2020-07-21 22:23:54,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:23:54,905 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 504 transitions. [2020-07-21 22:23:54,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 22:23:54,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:54,923 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:55,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:55,138 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:55,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:55,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1532483613, now seen corresponding path program 32 times [2020-07-21 22:23:55,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:55,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295274004] [2020-07-21 22:23:55,140 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 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:55,868 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:23:55,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:55,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:23:55,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 686 proven. 317 refuted. 0 times theorem prover too weak. 5423 trivial. 0 not checked. [2020-07-21 22:23:56,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:58,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:58,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:59,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:59,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:00,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:00,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:00,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:00,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:00,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:01,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 688 proven. 331 refuted. 0 times theorem prover too weak. 5407 trivial. 0 not checked. [2020-07-21 22:24:02,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295274004] [2020-07-21 22:24:02,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:02,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:24:02,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398764157] [2020-07-21 22:24:02,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:24:02,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:02,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:24:02,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:24:02,846 INFO L87 Difference]: Start difference. First operand 230 states and 504 transitions. Second operand 17 states. [2020-07-21 22:24:03,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:03,644 INFO L93 Difference]: Finished difference Result 344 states and 816 transitions. [2020-07-21 22:24:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:24:03,647 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-21 22:24:03,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:03,654 INFO L225 Difference]: With dead ends: 344 [2020-07-21 22:24:03,655 INFO L226 Difference]: Without dead ends: 329 [2020-07-21 22:24:03,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 921 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:24:03,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-07-21 22:24:03,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 220. [2020-07-21 22:24:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-07-21 22:24:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 463 transitions. [2020-07-21 22:24:03,696 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 463 transitions. Word has length 475 [2020-07-21 22:24:03,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:03,697 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 463 transitions. [2020-07-21 22:24:03,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:24:03,697 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 463 transitions. [2020-07-21 22:24:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-07-21 22:24:03,705 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:03,705 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 28, 28, 26, 24, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 12, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:03,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:03,919 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:03,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1875781881, now seen corresponding path program 33 times [2020-07-21 22:24:03,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:03,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658413767] [2020-07-21 22:24:03,920 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 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:04,668 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:24:04,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:04,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:24:04,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5069 backedges. 513 proven. 434 refuted. 0 times theorem prover too weak. 4122 trivial. 0 not checked. [2020-07-21 22:24:05,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:06,854 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-07-21 22:24:08,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:09,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:09,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:10,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:10,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:10,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:10,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:10,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:10,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:11,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:11,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5069 backedges. 511 proven. 452 refuted. 0 times theorem prover too weak. 4106 trivial. 0 not checked. [2020-07-21 22:24:12,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658413767] [2020-07-21 22:24:12,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:12,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 22:24:12,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050358399] [2020-07-21 22:24:12,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:24:12,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:12,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:24:12,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:24:12,416 INFO L87 Difference]: Start difference. First operand 220 states and 463 transitions. Second operand 19 states. [2020-07-21 22:24:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:13,498 INFO L93 Difference]: Finished difference Result 310 states and 688 transitions. [2020-07-21 22:24:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:24:13,503 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 423 [2020-07-21 22:24:13,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:13,509 INFO L225 Difference]: With dead ends: 310 [2020-07-21 22:24:13,509 INFO L226 Difference]: Without dead ends: 292 [2020-07-21 22:24:13,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 815 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:24:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-07-21 22:24:13,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 217. [2020-07-21 22:24:13,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-07-21 22:24:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 447 transitions. [2020-07-21 22:24:13,536 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 447 transitions. Word has length 423 [2020-07-21 22:24:13,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:13,536 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 447 transitions. [2020-07-21 22:24:13,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:24:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 447 transitions. [2020-07-21 22:24:13,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-21 22:24:13,541 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:13,541 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 32, 32, 28, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 10, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:13,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:13,743 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:13,744 INFO L82 PathProgramCache]: Analyzing trace with hash 224917928, now seen corresponding path program 34 times [2020-07-21 22:24:13,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:13,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681956519] [2020-07-21 22:24:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:14,466 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:24:14,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:14,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:24:14,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 589 proven. 250 refuted. 0 times theorem prover too weak. 5278 trivial. 0 not checked. [2020-07-21 22:24:14,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:16,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:16,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:17,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:17,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:17,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:17,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:17,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:17,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:18,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 591 proven. 258 refuted. 0 times theorem prover too weak. 5268 trivial. 0 not checked. [2020-07-21 22:24:19,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681956519] [2020-07-21 22:24:19,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:19,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:24:19,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443538387] [2020-07-21 22:24:19,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:24:19,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:19,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:24:19,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:24:19,276 INFO L87 Difference]: Start difference. First operand 217 states and 447 transitions. Second operand 15 states. [2020-07-21 22:24:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:19,633 INFO L93 Difference]: Finished difference Result 357 states and 877 transitions. [2020-07-21 22:24:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:24:19,634 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 464 [2020-07-21 22:24:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:19,641 INFO L225 Difference]: With dead ends: 357 [2020-07-21 22:24:19,642 INFO L226 Difference]: Without dead ends: 342 [2020-07-21 22:24:19,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 903 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:24:19,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-07-21 22:24:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 217. [2020-07-21 22:24:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-07-21 22:24:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 447 transitions. [2020-07-21 22:24:19,676 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 447 transitions. Word has length 464 [2020-07-21 22:24:19,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:19,676 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 447 transitions. [2020-07-21 22:24:19,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:24:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 447 transitions. [2020-07-21 22:24:19,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-21 22:24:19,682 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:19,683 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 26, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:19,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:19,894 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:19,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:19,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1584175489, now seen corresponding path program 35 times [2020-07-21 22:24:19,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:19,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162393149] [2020-07-21 22:24:19,896 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 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:20,747 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:24:20,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:20,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:24:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 695 proven. 243 refuted. 0 times theorem prover too weak. 4743 trivial. 0 not checked. [2020-07-21 22:24:20,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:23,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:23,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:24,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:24,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:24,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:25,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:25,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:25,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:25,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:25,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:25,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 699 proven. 253 refuted. 0 times theorem prover too weak. 4729 trivial. 0 not checked. [2020-07-21 22:24:27,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162393149] [2020-07-21 22:24:27,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:27,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:24:27,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990042379] [2020-07-21 22:24:27,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:24:27,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:27,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:24:27,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:24:27,641 INFO L87 Difference]: Start difference. First operand 217 states and 447 transitions. Second operand 17 states. [2020-07-21 22:24:28,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:28,443 INFO L93 Difference]: Finished difference Result 296 states and 651 transitions. [2020-07-21 22:24:28,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:24:28,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 448 [2020-07-21 22:24:28,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:28,453 INFO L225 Difference]: With dead ends: 296 [2020-07-21 22:24:28,453 INFO L226 Difference]: Without dead ends: 281 [2020-07-21 22:24:28,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 867 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:24:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-07-21 22:24:28,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 209. [2020-07-21 22:24:28,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-07-21 22:24:28,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 423 transitions. [2020-07-21 22:24:28,484 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 423 transitions. Word has length 448 [2020-07-21 22:24:28,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:28,485 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 423 transitions. [2020-07-21 22:24:28,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:24:28,485 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 423 transitions. [2020-07-21 22:24:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 22:24:28,493 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:28,493 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 27, 26, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:28,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:28,704 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:28,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:28,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1537228671, now seen corresponding path program 36 times [2020-07-21 22:24:28,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:28,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590868959] [2020-07-21 22:24:28,706 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 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:29,615 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:24:29,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:29,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:24:29,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5732 backedges. 874 proven. 246 refuted. 0 times theorem prover too weak. 4612 trivial. 0 not checked. [2020-07-21 22:24:29,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:33,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:33,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:34,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:35,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:36,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:36,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:36,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:36,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:36,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:37,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5732 backedges. 876 proven. 265 refuted. 0 times theorem prover too weak. 4591 trivial. 0 not checked. [2020-07-21 22:24:39,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590868959] [2020-07-21 22:24:39,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:39,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:24:39,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526257011] [2020-07-21 22:24:39,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:24:39,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:39,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:24:39,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:24:39,064 INFO L87 Difference]: Start difference. First operand 209 states and 423 transitions. Second operand 19 states. [2020-07-21 22:24:40,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:40,059 INFO L93 Difference]: Finished difference Result 285 states and 598 transitions. [2020-07-21 22:24:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:24:40,059 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 450 [2020-07-21 22:24:40,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:40,066 INFO L225 Difference]: With dead ends: 285 [2020-07-21 22:24:40,066 INFO L226 Difference]: Without dead ends: 270 [2020-07-21 22:24:40,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 867 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:24:40,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-07-21 22:24:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 235. [2020-07-21 22:24:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-07-21 22:24:40,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 488 transitions. [2020-07-21 22:24:40,096 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 488 transitions. Word has length 450 [2020-07-21 22:24:40,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:40,097 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 488 transitions. [2020-07-21 22:24:40,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:24:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 488 transitions. [2020-07-21 22:24:40,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-21 22:24:40,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:40,108 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 26, 25, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 11, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:40,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:40,323 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:40,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:40,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1264905697, now seen corresponding path program 37 times [2020-07-21 22:24:40,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:40,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731066343] [2020-07-21 22:24:40,324 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 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:41,240 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:24:41,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:41,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:24:41,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5693 backedges. 740 proven. 199 refuted. 0 times theorem prover too weak. 4754 trivial. 0 not checked. [2020-07-21 22:24:41,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:44,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:44,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:45,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:45,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:45,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:45,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:46,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:46,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:46,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:46,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:46,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5693 backedges. 744 proven. 211 refuted. 0 times theorem prover too weak. 4738 trivial. 0 not checked. [2020-07-21 22:24:48,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731066343] [2020-07-21 22:24:48,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:48,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:24:48,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219759530] [2020-07-21 22:24:48,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:24:48,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:48,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:24:48,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:24:48,295 INFO L87 Difference]: Start difference. First operand 235 states and 488 transitions. Second operand 17 states. [2020-07-21 22:24:48,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:48,686 INFO L93 Difference]: Finished difference Result 274 states and 565 transitions. [2020-07-21 22:24:48,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:24:48,688 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 448 [2020-07-21 22:24:48,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:48,692 INFO L225 Difference]: With dead ends: 274 [2020-07-21 22:24:48,693 INFO L226 Difference]: Without dead ends: 259 [2020-07-21 22:24:48,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 867 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:24:48,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-07-21 22:24:48,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 227. [2020-07-21 22:24:48,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-07-21 22:24:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 466 transitions. [2020-07-21 22:24:48,716 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 466 transitions. Word has length 448 [2020-07-21 22:24:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:48,716 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 466 transitions. [2020-07-21 22:24:48,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:24:48,717 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 466 transitions. [2020-07-21 22:24:48,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 22:24:48,721 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:48,721 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 26, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:48,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:48,922 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:48,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:48,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1988433848, now seen corresponding path program 38 times [2020-07-21 22:24:48,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:48,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342034173] [2020-07-21 22:24:48,924 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 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:49,735 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:24:49,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:49,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:24:49,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6083 backedges. 931 proven. 220 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2020-07-21 22:24:50,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:53,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:55,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:55,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:55,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:56,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:56,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:56,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:56,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:57,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6083 backedges. 931 proven. 243 refuted. 0 times theorem prover too weak. 4909 trivial. 0 not checked. [2020-07-21 22:24:59,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342034173] [2020-07-21 22:24:59,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:59,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:24:59,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875666501] [2020-07-21 22:24:59,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:24:59,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:59,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:24:59,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:24:59,629 INFO L87 Difference]: Start difference. First operand 227 states and 466 transitions. Second operand 19 states. [2020-07-21 22:25:00,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:25:00,799 INFO L93 Difference]: Finished difference Result 261 states and 528 transitions. [2020-07-21 22:25:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:25:00,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 463 [2020-07-21 22:25:00,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:25:00,805 INFO L225 Difference]: With dead ends: 261 [2020-07-21 22:25:00,805 INFO L226 Difference]: Without dead ends: 246 [2020-07-21 22:25:00,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 893 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:25:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-21 22:25:00,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 227. [2020-07-21 22:25:00,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-07-21 22:25:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 464 transitions. [2020-07-21 22:25:00,834 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 464 transitions. Word has length 463 [2020-07-21 22:25:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:25:00,834 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 464 transitions. [2020-07-21 22:25:00,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:25:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 464 transitions. [2020-07-21 22:25:00,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 22:25:00,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:25:00,839 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 10, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:25:01,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:01,040 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:25:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:25:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash -987013899, now seen corresponding path program 39 times [2020-07-21 22:25:01,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:25:01,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051295815] [2020-07-21 22:25:01,042 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 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:01,913 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:25:01,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:25:01,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:25:01,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:25:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 684 proven. 169 refuted. 0 times theorem prover too weak. 5600 trivial. 0 not checked. [2020-07-21 22:25:02,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:25:05,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:05,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:05,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:05,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:06,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:06,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:06,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:06,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:06,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:07,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 688 proven. 175 refuted. 0 times theorem prover too weak. 5590 trivial. 0 not checked. [2020-07-21 22:25:09,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051295815] [2020-07-21 22:25:09,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:25:09,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:25:09,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141063675] [2020-07-21 22:25:09,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:25:09,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:25:09,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:25:09,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:25:09,528 INFO L87 Difference]: Start difference. First operand 227 states and 464 transitions. Second operand 15 states. [2020-07-21 22:25:10,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:25:10,079 INFO L93 Difference]: Finished difference Result 288 states and 613 transitions. [2020-07-21 22:25:10,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:25:10,082 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 476 [2020-07-21 22:25:10,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:25:10,088 INFO L225 Difference]: With dead ends: 288 [2020-07-21 22:25:10,088 INFO L226 Difference]: Without dead ends: 275 [2020-07-21 22:25:10,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 927 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:25:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-07-21 22:25:10,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 238. [2020-07-21 22:25:10,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-21 22:25:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 480 transitions. [2020-07-21 22:25:10,115 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 480 transitions. Word has length 476 [2020-07-21 22:25:10,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:25:10,116 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 480 transitions. [2020-07-21 22:25:10,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:25:10,116 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 480 transitions. [2020-07-21 22:25:10,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-07-21 22:25:10,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:25:10,121 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 26, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 10, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:25:10,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:10,322 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:25:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:25:10,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1346520638, now seen corresponding path program 40 times [2020-07-21 22:25:10,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:25:10,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618792336] [2020-07-21 22:25:10,324 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 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:11,148 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:25:11,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:25:11,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:25:11,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:25:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 819 proven. 154 refuted. 0 times theorem prover too weak. 5083 trivial. 0 not checked. [2020-07-21 22:25:11,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:25:14,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:14,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:15,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:15,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:15,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:15,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:15,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:15,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:15,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:15,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:16,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:16,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 825 proven. 162 refuted. 0 times theorem prover too weak. 5069 trivial. 0 not checked. [2020-07-21 22:25:18,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618792336] [2020-07-21 22:25:18,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:25:18,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:25:18,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495329749] [2020-07-21 22:25:18,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:25:18,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:25:18,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:25:18,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:25:18,515 INFO L87 Difference]: Start difference. First operand 238 states and 480 transitions. Second operand 17 states. [2020-07-21 22:25:19,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:25:19,195 INFO L93 Difference]: Finished difference Result 279 states and 559 transitions. [2020-07-21 22:25:19,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:25:19,197 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 462 [2020-07-21 22:25:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:25:19,202 INFO L225 Difference]: With dead ends: 279 [2020-07-21 22:25:19,203 INFO L226 Difference]: Without dead ends: 266 [2020-07-21 22:25:19,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 929 GetRequests, 895 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:25:19,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-07-21 22:25:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 227. [2020-07-21 22:25:19,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-07-21 22:25:19,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 450 transitions. [2020-07-21 22:25:19,231 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 450 transitions. Word has length 462 [2020-07-21 22:25:19,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:25:19,231 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 450 transitions. [2020-07-21 22:25:19,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:25:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 450 transitions. [2020-07-21 22:25:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 22:25:19,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:25:19,238 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 29, 25, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:25:19,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:19,447 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:25:19,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:25:19,448 INFO L82 PathProgramCache]: Analyzing trace with hash -239087612, now seen corresponding path program 41 times [2020-07-21 22:25:19,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:25:19,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939360929] [2020-07-21 22:25:19,449 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 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:20,259 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:25:20,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:25:20,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:25:20,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:25:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6762 backedges. 805 proven. 306 refuted. 0 times theorem prover too weak. 5651 trivial. 0 not checked. [2020-07-21 22:25:20,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:25:24,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:24,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:25,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:25,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:25,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:25,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:25,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:25,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:26,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:26,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:26,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6762 backedges. 805 proven. 320 refuted. 0 times theorem prover too weak. 5637 trivial. 0 not checked. [2020-07-21 22:25:28,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939360929] [2020-07-21 22:25:28,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:25:28,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 22:25:28,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672694370] [2020-07-21 22:25:28,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:25:28,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:25:28,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:25:28,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:25:28,458 INFO L87 Difference]: Start difference. First operand 227 states and 450 transitions. Second operand 19 states. [2020-07-21 22:25:28,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:25:28,872 INFO L93 Difference]: Finished difference Result 292 states and 566 transitions. [2020-07-21 22:25:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:25:28,873 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-21 22:25:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:25:28,879 INFO L225 Difference]: With dead ends: 292 [2020-07-21 22:25:28,879 INFO L226 Difference]: Without dead ends: 277 [2020-07-21 22:25:28,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:25:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-07-21 22:25:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 221. [2020-07-21 22:25:28,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 22:25:28,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 430 transitions. [2020-07-21 22:25:28,910 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 430 transitions. Word has length 487 [2020-07-21 22:25:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:25:28,911 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 430 transitions. [2020-07-21 22:25:28,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:25:28,911 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 430 transitions. [2020-07-21 22:25:28,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-21 22:25:28,916 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:25:28,917 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 25, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 12, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:25:29,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:29,132 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:25:29,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:25:29,133 INFO L82 PathProgramCache]: Analyzing trace with hash 791007561, now seen corresponding path program 42 times [2020-07-21 22:25:29,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:25:29,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82897685] [2020-07-21 22:25:29,133 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 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:29,975 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:25:29,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:25:29,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:25:29,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:25:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5719 backedges. 599 proven. 177 refuted. 0 times theorem prover too weak. 4943 trivial. 0 not checked. [2020-07-21 22:25:30,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:25:32,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:32,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:33,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:33,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:33,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:33,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:33,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:33,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:34,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:34,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5719 backedges. 599 proven. 187 refuted. 0 times theorem prover too weak. 4933 trivial. 0 not checked. [2020-07-21 22:25:36,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82897685] [2020-07-21 22:25:36,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:25:36,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:25:36,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216581402] [2020-07-21 22:25:36,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:25:36,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:25:36,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:25:36,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:25:36,913 INFO L87 Difference]: Start difference. First operand 221 states and 430 transitions. Second operand 15 states. [2020-07-21 22:25:37,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:25:37,667 INFO L93 Difference]: Finished difference Result 254 states and 483 transitions. [2020-07-21 22:25:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:25:37,672 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 449 [2020-07-21 22:25:37,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:25:37,679 INFO L225 Difference]: With dead ends: 254 [2020-07-21 22:25:37,680 INFO L226 Difference]: Without dead ends: 239 [2020-07-21 22:25:37,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 873 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:25:37,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-21 22:25:37,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 215. [2020-07-21 22:25:37,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-07-21 22:25:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 420 transitions. [2020-07-21 22:25:37,701 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 420 transitions. Word has length 449 [2020-07-21 22:25:37,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:25:37,702 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 420 transitions. [2020-07-21 22:25:37,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:25:37,702 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 420 transitions. [2020-07-21 22:25:37,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 22:25:37,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:25:37,710 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 28, 25, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 13, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:25:37,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:37,925 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:25:37,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:25:37,926 INFO L82 PathProgramCache]: Analyzing trace with hash -272301621, now seen corresponding path program 43 times [2020-07-21 22:25:37,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:25:37,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880964364] [2020-07-21 22:25:37,927 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 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:38,783 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:25:38,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:25:38,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:25:38,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:25:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5746 backedges. 778 proven. 186 refuted. 0 times theorem prover too weak. 4782 trivial. 0 not checked. [2020-07-21 22:25:39,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:25:42,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:42,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:43,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:43,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:43,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:43,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:44,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:44,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:44,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:44,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:44,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:45,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5746 backedges. 778 proven. 206 refuted. 0 times theorem prover too weak. 4762 trivial. 0 not checked. [2020-07-21 22:25:47,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880964364] [2020-07-21 22:25:47,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:25:47,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:25:47,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291797161] [2020-07-21 22:25:47,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:25:47,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:25:47,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:25:47,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:25:47,507 INFO L87 Difference]: Start difference. First operand 215 states and 420 transitions. Second operand 17 states. [2020-07-21 22:25:48,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:25:48,481 INFO L93 Difference]: Finished difference Result 286 states and 600 transitions. [2020-07-21 22:25:48,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:25:48,481 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 450 [2020-07-21 22:25:48,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:25:48,487 INFO L225 Difference]: With dead ends: 286 [2020-07-21 22:25:48,487 INFO L226 Difference]: Without dead ends: 271 [2020-07-21 22:25:48,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 871 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:25:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-07-21 22:25:48,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 215. [2020-07-21 22:25:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-07-21 22:25:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 420 transitions. [2020-07-21 22:25:48,515 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 420 transitions. Word has length 450 [2020-07-21 22:25:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:25:48,516 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 420 transitions. [2020-07-21 22:25:48,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:25:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 420 transitions. [2020-07-21 22:25:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-07-21 22:25:48,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:25:48,521 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 26, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:25:48,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:48,722 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:25:48,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:25:48,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1953810544, now seen corresponding path program 44 times [2020-07-21 22:25:48,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:25:48,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403490780] [2020-07-21 22:25:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:49,695 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:25:49,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:25:49,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:25:49,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:25:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 545 proven. 116 refuted. 0 times theorem prover too weak. 5395 trivial. 0 not checked. [2020-07-21 22:25:49,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:25:51,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:51,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:52,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:52,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:52,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:52,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:52,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:52,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:53,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 545 proven. 123 refuted. 0 times theorem prover too weak. 5388 trivial. 0 not checked. [2020-07-21 22:25:55,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403490780] [2020-07-21 22:25:55,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:25:55,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 22:25:55,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715255491] [2020-07-21 22:25:55,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:25:55,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:25:55,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:25:55,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:25:55,516 INFO L87 Difference]: Start difference. First operand 215 states and 420 transitions. Second operand 13 states. [2020-07-21 22:25:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:25:55,979 INFO L93 Difference]: Finished difference Result 271 states and 573 transitions. [2020-07-21 22:25:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:25:55,982 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 462 [2020-07-21 22:25:55,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:25:55,987 INFO L225 Difference]: With dead ends: 271 [2020-07-21 22:25:55,988 INFO L226 Difference]: Without dead ends: 261 [2020-07-21 22:25:55,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 903 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:25:55,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-07-21 22:25:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 215. [2020-07-21 22:25:56,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-07-21 22:25:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 420 transitions. [2020-07-21 22:25:56,011 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 420 transitions. Word has length 462 [2020-07-21 22:25:56,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:25:56,012 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 420 transitions. [2020-07-21 22:25:56,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:25:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 420 transitions. [2020-07-21 22:25:56,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2020-07-21 22:25:56,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:25:56,020 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 37, 37, 30, 29, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 12, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:25:56,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:56,235 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:25:56,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:25:56,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2006560653, now seen corresponding path program 45 times [2020-07-21 22:25:56,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:25:56,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207133035] [2020-07-21 22:25:56,237 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 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:57,063 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:25:57,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:25:57,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:25:57,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:25:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 867 proven. 347 refuted. 0 times theorem prover too weak. 6783 trivial. 0 not checked. [2020-07-21 22:25:57,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:25:59,342 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-07-21 22:26:00,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:00,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:02,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:03,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:03,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:03,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:03,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:03,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:03,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:03,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:04,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 865 proven. 365 refuted. 0 times theorem prover too weak. 6767 trivial. 0 not checked. [2020-07-21 22:26:07,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207133035] [2020-07-21 22:26:07,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:26:07,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 22:26:07,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661165919] [2020-07-21 22:26:07,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:26:07,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:26:07,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:26:07,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:26:07,129 INFO L87 Difference]: Start difference. First operand 215 states and 420 transitions. Second operand 19 states. [2020-07-21 22:26:08,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:26:08,194 INFO L93 Difference]: Finished difference Result 230 states and 438 transitions. [2020-07-21 22:26:08,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:26:08,194 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 528 [2020-07-21 22:26:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:26:08,198 INFO L225 Difference]: With dead ends: 230 [2020-07-21 22:26:08,198 INFO L226 Difference]: Without dead ends: 215 [2020-07-21 22:26:08,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1061 GetRequests, 1025 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:26:08,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-21 22:26:08,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2020-07-21 22:26:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-07-21 22:26:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 389 transitions. [2020-07-21 22:26:08,217 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 389 transitions. Word has length 528 [2020-07-21 22:26:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:26:08,217 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 389 transitions. [2020-07-21 22:26:08,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:26:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 389 transitions. [2020-07-21 22:26:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 22:26:08,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:26:08,222 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:26:08,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:26:08,423 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:26:08,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:26:08,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 46 times [2020-07-21 22:26:08,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:26:08,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624104357] [2020-07-21 22:26:08,425 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 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:26:09,351 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:26:09,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 22:26:09,352 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:26:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 22:26:09,457 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:26:09,558 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 22:26:09,558 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 22:26:09,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:26:09,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:26:09 BoogieIcfgContainer [2020-07-21 22:26:09,941 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:26:09,944 INFO L168 Benchmark]: Toolchain (without parser) took 359798.22 ms. Allocated memory was 144.2 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 100.9 MB in the beginning and 401.8 MB in the end (delta: -300.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2020-07-21 22:26:09,944 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 22:26:09,945 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.92 ms. Allocated memory is still 144.2 MB. Free memory was 100.5 MB in the beginning and 90.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:26:09,945 INFO L168 Benchmark]: Boogie Preprocessor took 41.23 ms. Allocated memory is still 144.2 MB. Free memory was 90.5 MB in the beginning and 89.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:26:09,946 INFO L168 Benchmark]: RCFGBuilder took 481.11 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 89.1 MB in the beginning and 168.8 MB in the end (delta: -79.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 22:26:09,946 INFO L168 Benchmark]: TraceAbstraction took 358908.73 ms. Allocated memory was 202.4 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 168.2 MB in the beginning and 401.8 MB in the end (delta: -233.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2020-07-21 22:26:09,949 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 357.92 ms. Allocated memory is still 144.2 MB. Free memory was 100.5 MB in the beginning and 90.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.23 ms. Allocated memory is still 144.2 MB. Free memory was 90.5 MB in the beginning and 89.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 481.11 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 89.1 MB in the beginning and 168.8 MB in the end (delta: -79.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 358908.73 ms. Allocated memory was 202.4 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 168.2 MB in the beginning and 401.8 MB in the end (delta: -233.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 8; VAL [x=8] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=8] [L8] COND FALSE !(n < 1) VAL [\old(n)=8, n=8] [L10] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=7] [L18] COND FALSE !(n < 1) VAL [\old(n)=7, n=7] [L20] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=6] [L8] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L10] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L18] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L20] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=7, fibo1(n-1)=8, n=7] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=7, fibo1(n-1)=8, fibo1(n-2)=5, n=7] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=8, fibo2(n-1)=13, n=8] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=6] [L18] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L20] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=6, fibo1(n-1)=5, n=6] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=6, fibo1(n-1)=5, fibo1(n-2)=3, n=6] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=8, fibo2(n-1)=13, fibo2(n-2)=8, n=8] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=21, x=8] [L37] int result = fibo1(x); [L38] COND TRUE result == 21 VAL [result=21, x=8] [L39] __VERIFIER_error() VAL [result=21, x=8] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 358.6s, OverallIterations: 63, TraceHistogramMax: 44, AutomataDifference: 33.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1735 SDtfs, 3073 SDslu, 12315 SDs, 0 SdLazy, 13403 SolverSat, 3172 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44976 GetRequests, 42927 SyntacticMatches, 762 SemanticMatches, 1287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6113 ImplicationChecksByTransitivity, 33.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=238occurred in iteration=56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 62 MinimizatonAttempts, 2296 StatesRemovedByMinimization, 59 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 4.2s SatisfiabilityAnalysisTime, 280.7s InterpolantComputationTime, 22803 NumberOfCodeBlocks, 13725 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 44531 ConstructedInterpolants, 0 QuantifiedInterpolants, 25253634 SizeOfPredicates, 421 NumberOfNonLiveVariables, 29426 ConjunctsInSsa, 850 ConjunctsInUnsatCore, 122 InterpolantComputations, 2 PerfectInterpolantSequences, 493680/547306 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...