/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_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:48:19,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 00:48:19,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 00:48:19,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 00:48:19,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 00:48:19,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 00:48:19,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 00:48:19,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 00:48:19,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 00:48:19,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 00:48:19,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 00:48:19,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 00:48:19,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:48:19,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:48:19,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:48:19,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:48:19,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:48:19,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:48:19,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:48:19,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:48:19,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:48:19,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:48:19,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:48:19,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:48:19,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:48:19,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 00:48:19,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 00:48:19,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 00:48:19,225 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 00:48:19,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:48:19,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:48:19,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:48:19,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:48:19,242 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:48:19,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:48:19,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:48:19,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:48:19,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:48:19,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:48:19,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:48:19,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:48:19,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:48:19,244 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:48:19,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:48:19,244 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:48:19,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:48:19,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:48:19,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:48:19,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:48:19,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:48:19,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:48:19,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:48:19,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:48:19,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:48:19,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:48:19,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:19,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:48:19,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:48:19,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 00:48:19,536 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:48:19,555 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:48:19,558 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:48:19,560 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:48:19,563 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:48:19,564 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-21 00:48:19,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee3e88b79/6bc8b6795749473fada92e783c875b70/FLAGf98c1665b [2020-07-21 00:48:20,147 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:48:20,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-21 00:48:20,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee3e88b79/6bc8b6795749473fada92e783c875b70/FLAGf98c1665b [2020-07-21 00:48:20,504 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee3e88b79/6bc8b6795749473fada92e783c875b70 [2020-07-21 00:48:20,513 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:48:20,515 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:48:20,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:48:20,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:48:20,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:48:20,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:48:20" (1/1) ... [2020-07-21 00:48:20,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@509fad81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:48:20, skipping insertion in model container [2020-07-21 00:48:20,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:48:20" (1/1) ... [2020-07-21 00:48:20,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:48:20,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:48:20,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:48:20,801 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:48:20,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:48:20,834 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:48:20,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:48:20 WrapperNode [2020-07-21 00:48:20,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:48:20,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:48:20,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:48:20,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:48:20,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:48:20" (1/1) ... [2020-07-21 00:48:20,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:48:20" (1/1) ... [2020-07-21 00:48:20,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:48:20" (1/1) ... [2020-07-21 00:48:20,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:48:20" (1/1) ... [2020-07-21 00:48:20,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:48:20" (1/1) ... [2020-07-21 00:48:20,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:48:20" (1/1) ... [2020-07-21 00:48:20,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:48:20" (1/1) ... [2020-07-21 00:48:20,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:48:20,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:48:20,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:48:20,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:48:20,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:48:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:48:21,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:48:21,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:48:21,018 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 00:48:21,018 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 00:48:21,018 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:48:21,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:48:21,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:48:21,019 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 00:48:21,019 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 00:48:21,019 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:48:21,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:48:21,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:48:21,261 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:48:21,261 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:48:21,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:48:21 BoogieIcfgContainer [2020-07-21 00:48:21,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:48:21,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:48:21,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:48:21,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:48:21,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:48:20" (1/3) ... [2020-07-21 00:48:21,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31bfd13d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:48:21, skipping insertion in model container [2020-07-21 00:48:21,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:48:20" (2/3) ... [2020-07-21 00:48:21,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31bfd13d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:48:21, skipping insertion in model container [2020-07-21 00:48:21,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:48:21" (3/3) ... [2020-07-21 00:48:21,303 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-07-21 00:48:21,323 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:48:21,336 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:48:21,351 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:48:21,378 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:48:21,378 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:48:21,378 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:48:21,378 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:48:21,379 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:48:21,379 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:48:21,379 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:48:21,379 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:48:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 00:48:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 00:48:21,407 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:21,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:21,409 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:21,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:21,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 00:48:21,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:21,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632447679] [2020-07-21 00:48:21,422 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:21,484 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:21,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:21,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:48:21,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:48:21,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:48:21,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632447679] [2020-07-21 00:48:21,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:48:21,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:48:21,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322946289] [2020-07-21 00:48:21,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:48:21,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:21,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:48:21,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:48:21,616 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 00:48:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:21,743 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 00:48:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:48:21,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 00:48:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:21,757 INFO L225 Difference]: With dead ends: 44 [2020-07-21 00:48:21,758 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 00:48:21,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:48:21,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 00:48:21,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 00:48:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 00:48:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 00:48:21,815 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 00:48:21,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:21,816 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 00:48:21,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:48:21,816 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 00:48:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 00:48:21,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:21,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:22,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:22,033 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:22,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:22,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 00:48:22,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:22,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628448890] [2020-07-21 00:48:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:22,061 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:48:22,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:22,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:48:22,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:48:22,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:48:22,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628448890] [2020-07-21 00:48:22,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:48:22,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:48:22,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471864045] [2020-07-21 00:48:22,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:48:22,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:22,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:48:22,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:48:22,109 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 00:48:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:22,224 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 00:48:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:48:22,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 00:48:22,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:22,227 INFO L225 Difference]: With dead ends: 36 [2020-07-21 00:48:22,227 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 00:48:22,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:48:22,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 00:48:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 00:48:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 00:48:22,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 00:48:22,239 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 00:48:22,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:22,240 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 00:48:22,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:48:22,240 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 00:48:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 00:48:22,242 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:22,242 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 00:48:22,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:22,444 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:22,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:22,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 00:48:22,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:22,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592196223] [2020-07-21 00:48:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:22,499 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:22,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:22,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:48:22,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:22,593 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 00:48:22,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:22,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:22,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:22,857 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 00:48:22,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592196223] [2020-07-21 00:48:22,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:22,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 00:48:22,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678800494] [2020-07-21 00:48:22,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:48:22,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:22,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:48:22,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:48:22,867 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 00:48:22,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:22,988 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 00:48:22,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:48:22,989 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 00:48:22,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:22,991 INFO L225 Difference]: With dead ends: 41 [2020-07-21 00:48:22,991 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 00:48:22,992 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 00:48:22,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 00:48:23,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 00:48:23,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 00:48:23,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 00:48:23,002 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 00:48:23,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:23,003 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 00:48:23,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:48:23,003 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 00:48:23,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 00:48:23,005 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:23,005 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 00:48:23,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:23,220 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:23,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:23,221 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 00:48:23,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:23,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331754920] [2020-07-21 00:48:23,223 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 00:48:23,247 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:23,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:23,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:48:23,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:23,298 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 00:48:23,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:23,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:23,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:23,514 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 00:48:23,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331754920] [2020-07-21 00:48:23,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:23,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 00:48:23,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012745554] [2020-07-21 00:48:23,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:48:23,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:23,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:48:23,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:48:23,519 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 00:48:23,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:23,674 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 00:48:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:48:23,674 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 00:48:23,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:23,677 INFO L225 Difference]: With dead ends: 46 [2020-07-21 00:48:23,677 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 00:48:23,678 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 00:48:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 00:48:23,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 00:48:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 00:48:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 00:48:23,696 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 00:48:23,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:23,696 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 00:48:23,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:48:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 00:48:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 00:48:23,699 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:23,699 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 00:48:23,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:23,905 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:23,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:23,906 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 00:48:23,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:23,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759208374] [2020-07-21 00:48:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:23,944 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:23,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:23,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:48:23,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:24,002 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 00:48:24,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:24,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:24,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:24,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:24,412 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 00:48:24,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759208374] [2020-07-21 00:48:24,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:24,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 00:48:24,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42043950] [2020-07-21 00:48:24,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:48:24,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:24,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:48:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:48:24,415 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 00:48:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:24,600 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 00:48:24,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:48:24,601 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 00:48:24,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:24,603 INFO L225 Difference]: With dead ends: 51 [2020-07-21 00:48:24,603 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 00:48:24,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 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 00:48:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 00:48:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 00:48:24,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 00:48:24,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 00:48:24,621 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 00:48:24,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:24,621 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 00:48:24,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:48:24,621 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 00:48:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 00:48:24,623 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:24,624 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 00:48:24,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:24,830 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:24,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:24,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 00:48:24,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:24,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647672064] [2020-07-21 00:48:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:24,867 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:24,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:24,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:48:24,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:24,934 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 00:48:24,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:25,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:25,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:25,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:25,295 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 00:48:25,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647672064] [2020-07-21 00:48:25,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:25,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 00:48:25,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563681188] [2020-07-21 00:48:25,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:48:25,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:25,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:48:25,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:48:25,298 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 00:48:25,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:25,497 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 00:48:25,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:48:25,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 00:48:25,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:25,508 INFO L225 Difference]: With dead ends: 56 [2020-07-21 00:48:25,509 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 00:48:25,510 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 00:48:25,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 00:48:25,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 00:48:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 00:48:25,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 00:48:25,535 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 00:48:25,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:25,539 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 00:48:25,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:48:25,539 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 00:48:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 00:48:25,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:25,544 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 00:48:25,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:25,745 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 00:48:25,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:25,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481829055] [2020-07-21 00:48:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:25,794 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:25,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:25,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:48:25,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:25,871 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 00:48:25,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:26,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:26,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:26,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:26,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:26,462 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 00:48:26,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481829055] [2020-07-21 00:48:26,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:26,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 00:48:26,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452855266] [2020-07-21 00:48:26,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:48:26,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:26,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:48:26,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:48:26,464 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 00:48:26,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:26,680 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 00:48:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:48:26,680 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 00:48:26,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:26,684 INFO L225 Difference]: With dead ends: 61 [2020-07-21 00:48:26,684 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 00:48:26,685 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 00:48:26,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 00:48:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 00:48:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 00:48:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 00:48:26,696 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 00:48:26,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:26,696 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 00:48:26,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:48:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 00:48:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 00:48:26,699 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:26,699 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 00:48:26,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:26,903 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:26,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:26,904 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 00:48:26,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:26,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302438438] [2020-07-21 00:48:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:26,943 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:26,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:26,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:48:26,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:27,020 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 00:48:27,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:27,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:27,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:27,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:27,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:27,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:27,537 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 00:48:27,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302438438] [2020-07-21 00:48:27,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:27,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:48:27,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707150247] [2020-07-21 00:48:27,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:48:27,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:27,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:48:27,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:48:27,542 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 13 states. [2020-07-21 00:48:27,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:27,744 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 00:48:27,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:48:27,744 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-07-21 00:48:27,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:27,747 INFO L225 Difference]: With dead ends: 66 [2020-07-21 00:48:27,748 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 00:48:27,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:48:27,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 00:48:27,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 00:48:27,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 00:48:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 00:48:27,761 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 00:48:27,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:27,762 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 00:48:27,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:48:27,762 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 00:48:27,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 00:48:27,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:27,765 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 00:48:27,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:27,979 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:27,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:27,980 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 00:48:27,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:27,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519439759] [2020-07-21 00:48:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:28,044 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:28,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:28,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:48:28,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:28,123 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 00:48:28,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:28,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:28,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:28,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:28,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:28,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:29,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:29,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:29,063 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 00:48:29,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519439759] [2020-07-21 00:48:29,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:29,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:48:29,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695089604] [2020-07-21 00:48:29,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:48:29,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:29,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:48:29,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:48:29,066 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 15 states. [2020-07-21 00:48:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:29,318 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 00:48:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:48:29,319 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-07-21 00:48:29,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:29,321 INFO L225 Difference]: With dead ends: 71 [2020-07-21 00:48:29,321 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 00:48:29,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:48:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 00:48:29,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 00:48:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 00:48:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 00:48:29,335 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 00:48:29,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:29,335 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 00:48:29,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:48:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 00:48:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 00:48:29,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:29,340 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 00:48:29,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:29,550 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:29,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:29,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 00:48:29,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:29,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799305204] [2020-07-21 00:48:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:29,619 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:29,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:29,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:48:29,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 27 proven. 79 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-07-21 00:48:29,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:30,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:30,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:30,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:30,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 27 proven. 83 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-07-21 00:48:30,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799305204] [2020-07-21 00:48:30,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:30,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:48:30,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105697351] [2020-07-21 00:48:30,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:48:30,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:30,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:48:30,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:48:30,332 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 13 states. [2020-07-21 00:48:30,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:30,528 INFO L93 Difference]: Finished difference Result 84 states and 164 transitions. [2020-07-21 00:48:30,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:48:30,536 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-07-21 00:48:30,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:30,538 INFO L225 Difference]: With dead ends: 84 [2020-07-21 00:48:30,538 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 00:48:30,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 196 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:48:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 00:48:30,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2020-07-21 00:48:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 00:48:30,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2020-07-21 00:48:30,555 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 108 [2020-07-21 00:48:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:30,556 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2020-07-21 00:48:30,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:48:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2020-07-21 00:48:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 00:48:30,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:30,560 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:30,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:30,763 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:30,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:30,763 INFO L82 PathProgramCache]: Analyzing trace with hash -60364660, now seen corresponding path program 1 times [2020-07-21 00:48:30,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:30,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125106128] [2020-07-21 00:48:30,764 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:30,821 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:30,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:30,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:48:30,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 36 proven. 56 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-07-21 00:48:30,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:31,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:31,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:31,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-07-21 00:48:31,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125106128] [2020-07-21 00:48:31,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:31,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 00:48:31,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287479318] [2020-07-21 00:48:31,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:48:31,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:31,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:48:31,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:48:31,347 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand 11 states. [2020-07-21 00:48:31,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:31,494 INFO L93 Difference]: Finished difference Result 79 states and 145 transitions. [2020-07-21 00:48:31,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:48:31,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 109 [2020-07-21 00:48:31,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:31,497 INFO L225 Difference]: With dead ends: 79 [2020-07-21 00:48:31,497 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 00:48:31,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 202 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:48:31,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 00:48:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-07-21 00:48:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 00:48:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 85 transitions. [2020-07-21 00:48:31,510 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 85 transitions. Word has length 109 [2020-07-21 00:48:31,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:31,510 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 85 transitions. [2020-07-21 00:48:31,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:48:31,511 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 85 transitions. [2020-07-21 00:48:31,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 00:48:31,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:31,513 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:31,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:31,721 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:31,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:31,722 INFO L82 PathProgramCache]: Analyzing trace with hash 836558126, now seen corresponding path program 1 times [2020-07-21 00:48:31,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:31,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223866132] [2020-07-21 00:48:31,723 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:31,784 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:31,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:31,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:48:31,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 81 proven. 105 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-07-21 00:48:31,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:32,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:32,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:32,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:32,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:32,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:32,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:32,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 81 proven. 113 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-07-21 00:48:32,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223866132] [2020-07-21 00:48:32,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:32,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:48:32,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773852885] [2020-07-21 00:48:32,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:48:32,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:32,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:48:32,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:48:32,860 INFO L87 Difference]: Start difference. First operand 54 states and 85 transitions. Second operand 15 states. [2020-07-21 00:48:33,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:33,144 INFO L93 Difference]: Finished difference Result 94 states and 199 transitions. [2020-07-21 00:48:33,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:48:33,144 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-07-21 00:48:33,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:33,146 INFO L225 Difference]: With dead ends: 94 [2020-07-21 00:48:33,146 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 00:48:33,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 245 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:48:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 00:48:33,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-07-21 00:48:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 00:48:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 95 transitions. [2020-07-21 00:48:33,159 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 95 transitions. Word has length 135 [2020-07-21 00:48:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:33,160 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 95 transitions. [2020-07-21 00:48:33,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:48:33,160 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 95 transitions. [2020-07-21 00:48:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 00:48:33,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:33,163 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:33,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:33,378 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:33,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:33,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1608635723, now seen corresponding path program 2 times [2020-07-21 00:48:33,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:33,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96056433] [2020-07-21 00:48:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:33,447 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:33,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:33,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:48:33,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 48 proven. 78 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2020-07-21 00:48:33,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:33,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:33,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:34,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:34,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:34,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 48 proven. 82 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-07-21 00:48:34,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96056433] [2020-07-21 00:48:34,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:34,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:48:34,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750448240] [2020-07-21 00:48:34,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:48:34,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:34,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:48:34,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:48:34,170 INFO L87 Difference]: Start difference. First operand 62 states and 95 transitions. Second operand 13 states. [2020-07-21 00:48:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:34,365 INFO L93 Difference]: Finished difference Result 92 states and 161 transitions. [2020-07-21 00:48:34,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:48:34,366 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-07-21 00:48:34,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:34,367 INFO L225 Difference]: With dead ends: 92 [2020-07-21 00:48:34,368 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 00:48:34,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 221 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:48:34,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 00:48:34,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2020-07-21 00:48:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 00:48:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 103 transitions. [2020-07-21 00:48:34,391 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 103 transitions. Word has length 121 [2020-07-21 00:48:34,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:34,394 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 103 transitions. [2020-07-21 00:48:34,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:48:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 103 transitions. [2020-07-21 00:48:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-21 00:48:34,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:34,397 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:34,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:34,612 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:34,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:34,612 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 3 times [2020-07-21 00:48:34,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:34,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875993644] [2020-07-21 00:48:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:34,694 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:48:34,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:34,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:48:34,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-21 00:48:34,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:34,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:35,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:35,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:35,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-07-21 00:48:35,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875993644] [2020-07-21 00:48:35,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:35,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 00:48:35,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797230961] [2020-07-21 00:48:35,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:48:35,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:35,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:48:35,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:48:35,156 INFO L87 Difference]: Start difference. First operand 65 states and 103 transitions. Second operand 11 states. [2020-07-21 00:48:35,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:35,286 INFO L93 Difference]: Finished difference Result 84 states and 140 transitions. [2020-07-21 00:48:35,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:48:35,287 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 95 [2020-07-21 00:48:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:35,289 INFO L225 Difference]: With dead ends: 84 [2020-07-21 00:48:35,289 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 00:48:35,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 173 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:48:35,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 00:48:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-07-21 00:48:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 00:48:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 122 transitions. [2020-07-21 00:48:35,298 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 122 transitions. Word has length 95 [2020-07-21 00:48:35,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:35,299 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 122 transitions. [2020-07-21 00:48:35,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:48:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 122 transitions. [2020-07-21 00:48:35,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-21 00:48:35,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:35,301 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:35,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:35,516 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:35,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:35,517 INFO L82 PathProgramCache]: Analyzing trace with hash 594466134, now seen corresponding path program 4 times [2020-07-21 00:48:35,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:35,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140113565] [2020-07-21 00:48:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:35,591 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:48:35,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:35,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:48:35,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 83 proven. 24 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-07-21 00:48:35,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:35,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:35,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:36,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:36,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:36,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 85 proven. 26 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-07-21 00:48:36,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140113565] [2020-07-21 00:48:36,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:36,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:48:36,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577372670] [2020-07-21 00:48:36,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:48:36,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:36,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:48:36,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:48:36,266 INFO L87 Difference]: Start difference. First operand 72 states and 122 transitions. Second operand 13 states. [2020-07-21 00:48:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:36,467 INFO L93 Difference]: Finished difference Result 92 states and 158 transitions. [2020-07-21 00:48:36,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:48:36,467 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 107 [2020-07-21 00:48:36,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:36,472 INFO L225 Difference]: With dead ends: 92 [2020-07-21 00:48:36,472 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 00:48:36,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 193 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:48:36,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 00:48:36,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2020-07-21 00:48:36,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 00:48:36,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-21 00:48:36,495 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 107 [2020-07-21 00:48:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:36,496 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-21 00:48:36,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:48:36,496 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-21 00:48:36,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 00:48:36,499 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:36,499 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:36,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:36,715 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:36,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:36,716 INFO L82 PathProgramCache]: Analyzing trace with hash 235412830, now seen corresponding path program 5 times [2020-07-21 00:48:36,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:36,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094442394] [2020-07-21 00:48:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:36,796 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:48:36,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:36,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:48:36,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 19 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-07-21 00:48:36,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:37,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:37,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:37,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:37,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 00:48:37,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094442394] [2020-07-21 00:48:37,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:37,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 00:48:37,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888887947] [2020-07-21 00:48:37,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:48:37,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:37,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:48:37,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:48:37,266 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 11 states. [2020-07-21 00:48:37,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:37,405 INFO L93 Difference]: Finished difference Result 91 states and 155 transitions. [2020-07-21 00:48:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:48:37,406 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-07-21 00:48:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:37,408 INFO L225 Difference]: With dead ends: 91 [2020-07-21 00:48:37,412 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 00:48:37,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:48:37,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 00:48:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-07-21 00:48:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 00:48:37,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-21 00:48:37,424 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 108 [2020-07-21 00:48:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:37,425 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-21 00:48:37,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:48:37,425 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-21 00:48:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 00:48:37,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:37,429 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:37,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:37,643 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:37,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 6 times [2020-07-21 00:48:37,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:37,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998356122] [2020-07-21 00:48:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:37,801 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:48:37,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:37,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-21 00:48:37,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-21 00:48:38,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-21 00:48:39,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998356122] [2020-07-21 00:48:39,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:39,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-21 00:48:39,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429605257] [2020-07-21 00:48:39,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 00:48:39,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:39,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 00:48:39,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-21 00:48:39,145 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 28 states. [2020-07-21 00:48:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:39,637 INFO L93 Difference]: Finished difference Result 148 states and 317 transitions. [2020-07-21 00:48:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 00:48:39,638 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2020-07-21 00:48:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:39,640 INFO L225 Difference]: With dead ends: 148 [2020-07-21 00:48:39,641 INFO L226 Difference]: Without dead ends: 144 [2020-07-21 00:48:39,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:48:39,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-21 00:48:39,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2020-07-21 00:48:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 00:48:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 226 transitions. [2020-07-21 00:48:39,663 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 226 transitions. Word has length 109 [2020-07-21 00:48:39,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:39,664 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 226 transitions. [2020-07-21 00:48:39,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 00:48:39,664 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 226 transitions. [2020-07-21 00:48:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-07-21 00:48:39,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:39,669 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:39,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:39,884 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:39,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:39,884 INFO L82 PathProgramCache]: Analyzing trace with hash -706406608, now seen corresponding path program 7 times [2020-07-21 00:48:39,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:39,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136562007] [2020-07-21 00:48:39,885 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:39,966 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:39,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:39,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:48:39,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 60 proven. 98 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-07-21 00:48:40,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:40,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:40,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:40,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:40,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:40,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:40,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 62 proven. 100 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2020-07-21 00:48:40,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136562007] [2020-07-21 00:48:40,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:40,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:48:40,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249469882] [2020-07-21 00:48:40,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:48:40,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:40,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:48:40,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:48:40,746 INFO L87 Difference]: Start difference. First operand 107 states and 226 transitions. Second operand 13 states. [2020-07-21 00:48:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:40,980 INFO L93 Difference]: Finished difference Result 156 states and 384 transitions. [2020-07-21 00:48:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:48:40,981 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2020-07-21 00:48:40,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:40,984 INFO L225 Difference]: With dead ends: 156 [2020-07-21 00:48:40,985 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 00:48:40,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 253 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:48:40,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 00:48:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2020-07-21 00:48:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 00:48:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 226 transitions. [2020-07-21 00:48:41,006 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 226 transitions. Word has length 137 [2020-07-21 00:48:41,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:41,007 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 226 transitions. [2020-07-21 00:48:41,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:48:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 226 transitions. [2020-07-21 00:48:41,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-21 00:48:41,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:41,010 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:41,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:41,224 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:41,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:41,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1521075862, now seen corresponding path program 8 times [2020-07-21 00:48:41,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:41,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334188320] [2020-07-21 00:48:41,225 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:41,319 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:48:41,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:41,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:48:41,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 96 proven. 18 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-07-21 00:48:41,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:41,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:41,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:41,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:41,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:41,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:41,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:41,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 96 proven. 24 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-21 00:48:41,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334188320] [2020-07-21 00:48:41,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:41,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:48:41,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740049975] [2020-07-21 00:48:41,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:48:41,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:41,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:48:41,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:48:41,986 INFO L87 Difference]: Start difference. First operand 107 states and 226 transitions. Second operand 13 states. [2020-07-21 00:48:42,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:42,197 INFO L93 Difference]: Finished difference Result 138 states and 295 transitions. [2020-07-21 00:48:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:48:42,197 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 110 [2020-07-21 00:48:42,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:42,200 INFO L225 Difference]: With dead ends: 138 [2020-07-21 00:48:42,200 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 00:48:42,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 199 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:48:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 00:48:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 114. [2020-07-21 00:48:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-21 00:48:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 257 transitions. [2020-07-21 00:48:42,217 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 257 transitions. Word has length 110 [2020-07-21 00:48:42,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:42,218 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 257 transitions. [2020-07-21 00:48:42,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:48:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 257 transitions. [2020-07-21 00:48:42,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 00:48:42,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:42,222 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:42,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:42,436 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:42,437 INFO L82 PathProgramCache]: Analyzing trace with hash 989968015, now seen corresponding path program 9 times [2020-07-21 00:48:42,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:42,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561894308] [2020-07-21 00:48:42,438 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:42,545 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:48:42,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:42,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 00:48:42,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 112 proven. 26 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-07-21 00:48:42,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:43,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:43,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:43,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:43,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:43,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 111 proven. 31 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-21 00:48:43,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561894308] [2020-07-21 00:48:43,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:43,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 00:48:43,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043933005] [2020-07-21 00:48:43,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:48:43,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:43,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:48:43,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:48:43,446 INFO L87 Difference]: Start difference. First operand 114 states and 257 transitions. Second operand 15 states. [2020-07-21 00:48:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:43,692 INFO L93 Difference]: Finished difference Result 147 states and 340 transitions. [2020-07-21 00:48:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:48:43,693 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-21 00:48:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:43,696 INFO L225 Difference]: With dead ends: 147 [2020-07-21 00:48:43,696 INFO L226 Difference]: Without dead ends: 143 [2020-07-21 00:48:43,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:48:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-21 00:48:43,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 102. [2020-07-21 00:48:43,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-21 00:48:43,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2020-07-21 00:48:43,711 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 121 [2020-07-21 00:48:43,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:43,712 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2020-07-21 00:48:43,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:48:43,712 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2020-07-21 00:48:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 00:48:43,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:43,714 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:43,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:43,930 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:43,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:43,930 INFO L82 PathProgramCache]: Analyzing trace with hash -77183713, now seen corresponding path program 10 times [2020-07-21 00:48:43,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:43,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737482259] [2020-07-21 00:48:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:44,036 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:48:44,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:44,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 00:48:44,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 87 proven. 22 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2020-07-21 00:48:44,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:44,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:44,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:44,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:44,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 86 proven. 24 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-07-21 00:48:44,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737482259] [2020-07-21 00:48:44,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:44,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 00:48:44,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388808673] [2020-07-21 00:48:44,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:48:44,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:44,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:48:44,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:48:44,700 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand 13 states. [2020-07-21 00:48:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:44,896 INFO L93 Difference]: Finished difference Result 128 states and 276 transitions. [2020-07-21 00:48:44,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:48:44,896 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-07-21 00:48:44,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:44,901 INFO L225 Difference]: With dead ends: 128 [2020-07-21 00:48:44,901 INFO L226 Difference]: Without dead ends: 124 [2020-07-21 00:48:44,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 223 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:48:44,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-21 00:48:44,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2020-07-21 00:48:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 00:48:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 184 transitions. [2020-07-21 00:48:44,914 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 184 transitions. Word has length 121 [2020-07-21 00:48:44,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:44,916 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 184 transitions. [2020-07-21 00:48:44,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:48:44,916 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 184 transitions. [2020-07-21 00:48:44,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 00:48:44,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:44,919 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:45,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:45,134 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:45,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:45,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1853548191, now seen corresponding path program 11 times [2020-07-21 00:48:45,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:45,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414245105] [2020-07-21 00:48:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:45,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:45,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:45,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 00:48:45,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 67 proven. 71 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-07-21 00:48:45,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:45,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:45,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:45,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:45,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:46,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-21 00:48:46,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414245105] [2020-07-21 00:48:46,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:46,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 00:48:46,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704737208] [2020-07-21 00:48:46,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:48:46,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:46,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:48:46,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:48:46,038 INFO L87 Difference]: Start difference. First operand 94 states and 184 transitions. Second operand 15 states. [2020-07-21 00:48:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:46,287 INFO L93 Difference]: Finished difference Result 126 states and 280 transitions. [2020-07-21 00:48:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:48:46,291 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-21 00:48:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:46,293 INFO L225 Difference]: With dead ends: 126 [2020-07-21 00:48:46,293 INFO L226 Difference]: Without dead ends: 94 [2020-07-21 00:48:46,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:48:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-21 00:48:46,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2020-07-21 00:48:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 00:48:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 147 transitions. [2020-07-21 00:48:46,305 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 147 transitions. Word has length 121 [2020-07-21 00:48:46,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:46,305 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 147 transitions. [2020-07-21 00:48:46,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:48:46,305 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 147 transitions. [2020-07-21 00:48:46,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-21 00:48:46,307 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:46,308 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:46,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:46,521 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:46,522 INFO L82 PathProgramCache]: Analyzing trace with hash 250703466, now seen corresponding path program 1 times [2020-07-21 00:48:46,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:46,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492151178] [2020-07-21 00:48:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:46,649 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:46,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:46,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:48:46,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-07-21 00:48:46,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:47,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:47,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:47,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:47,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:47,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:47,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:47,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:47,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 38 proven. 102 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-07-21 00:48:47,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492151178] [2020-07-21 00:48:47,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:47,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:48:47,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895110910] [2020-07-21 00:48:47,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:48:47,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:47,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:48:47,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:48:47,726 INFO L87 Difference]: Start difference. First operand 81 states and 147 transitions. Second operand 15 states. [2020-07-21 00:48:47,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:47,976 INFO L93 Difference]: Finished difference Result 124 states and 266 transitions. [2020-07-21 00:48:47,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:48:47,977 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 110 [2020-07-21 00:48:47,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:47,979 INFO L225 Difference]: With dead ends: 124 [2020-07-21 00:48:47,979 INFO L226 Difference]: Without dead ends: 81 [2020-07-21 00:48:47,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 195 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:48:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-21 00:48:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2020-07-21 00:48:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 00:48:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-07-21 00:48:47,990 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 110 [2020-07-21 00:48:47,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:47,990 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-07-21 00:48:47,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:48:47,990 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-07-21 00:48:47,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 00:48:47,992 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:47,992 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:48,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:48,206 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:48,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:48,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1905629551, now seen corresponding path program 12 times [2020-07-21 00:48:48,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:48,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544475031] [2020-07-21 00:48:48,208 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:48,299 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:48:48,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:48,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 00:48:48,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 50 proven. 107 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-21 00:48:48,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:49,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:49,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:49,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:49,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:49,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:49,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:49,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 48 proven. 117 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-07-21 00:48:49,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544475031] [2020-07-21 00:48:49,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:49,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 00:48:49,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447532195] [2020-07-21 00:48:49,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:48:49,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:49,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:48:49,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:48:49,582 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 17 states. [2020-07-21 00:48:49,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:49,903 INFO L93 Difference]: Finished difference Result 129 states and 200 transitions. [2020-07-21 00:48:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:48:49,904 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 121 [2020-07-21 00:48:49,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:49,905 INFO L225 Difference]: With dead ends: 129 [2020-07-21 00:48:49,905 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 00:48:49,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 215 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:48:49,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 00:48:49,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-21 00:48:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 00:48:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-07-21 00:48:49,912 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 121 [2020-07-21 00:48:49,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:49,912 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-07-21 00:48:49,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:48:49,913 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-07-21 00:48:49,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 00:48:49,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:49,914 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:50,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:50,128 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:50,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1847656481, now seen corresponding path program 13 times [2020-07-21 00:48:50,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:50,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146257977] [2020-07-21 00:48:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:50,234 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:50,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:50,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 00:48:50,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 52 proven. 86 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-07-21 00:48:50,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:50,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:50,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:51,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:51,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:51,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:51,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 53 proven. 89 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-21 00:48:51,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146257977] [2020-07-21 00:48:51,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:51,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 00:48:51,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615931633] [2020-07-21 00:48:51,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:48:51,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:51,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:48:51,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:48:51,212 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 15 states. [2020-07-21 00:48:51,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:51,429 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-07-21 00:48:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:48:51,430 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-21 00:48:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:51,431 INFO L225 Difference]: With dead ends: 61 [2020-07-21 00:48:51,431 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 00:48:51,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:48:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 00:48:51,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 00:48:51,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 00:48:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 00:48:51,437 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2020-07-21 00:48:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:51,437 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 00:48:51,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:48:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 00:48:51,438 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 00:48:51,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:51,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 00:48:52,013 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2020-07-21 00:48:54,361 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 21 [2020-07-21 00:48:54,689 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-07-21 00:48:54,694 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 00:48:54,694 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:48:54,694 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:48:54,694 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 00:48:54,694 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 00:48:54,694 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 00:48:54,695 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 00:48:54,695 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-21 00:48:54,695 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-21 00:48:54,695 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-21 00:48:54,695 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 00:48:54,695 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 00:48:54,696 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-07-21 00:48:54,696 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 00:48:54,696 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-21 00:48:54,696 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-21 00:48:54,696 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 00:48:54,696 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 00:48:54,697 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (or (<= 5 |fibo2_#in~n|) (and (<= 4 |fibo2_#in~n|) (= 2 |fibo2_#t~ret2|)) (and (= 1 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 3))) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 00:48:54,697 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-21 00:48:54,697 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-21 00:48:54,697 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-21 00:48:54,697 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-21 00:48:54,697 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-21 00:48:54,697 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-21 00:48:54,697 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2020-07-21 00:48:54,697 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-21 00:48:54,698 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 4 |fibo1_#in~n|)) (and (<= 2 |fibo1_#in~n|) .cse0 (= 1 |fibo1_#t~ret0|)))) (let ((.cse1 (<= |fibo1_#in~n| fibo1_~n))) (or (and (<= 6 |fibo1_#in~n|) .cse1) (and (= 3 |fibo1_#t~ret0|) .cse1) (and (<= |fibo1_#in~n| 4) .cse1)))) [2020-07-21 00:48:54,698 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-21 00:48:54,698 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-21 00:48:54,698 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-21 00:48:54,698 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-21 00:48:54,698 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-21 00:48:54,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:48:54 BoogieIcfgContainer [2020-07-21 00:48:54,704 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:48:54,705 INFO L168 Benchmark]: Toolchain (without parser) took 34191.12 ms. Allocated memory was 145.8 MB in the beginning and 454.6 MB in the end (delta: 308.8 MB). Free memory was 102.9 MB in the beginning and 229.9 MB in the end (delta: -127.0 MB). Peak memory consumption was 326.5 MB. Max. memory is 7.1 GB. [2020-07-21 00:48:54,706 INFO L168 Benchmark]: CDTParser took 0.69 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 00:48:54,706 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.14 ms. Allocated memory is still 145.8 MB. Free memory was 102.5 MB in the beginning and 92.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 00:48:54,707 INFO L168 Benchmark]: Boogie Preprocessor took 28.12 ms. Allocated memory is still 145.8 MB. Free memory was 92.9 MB in the beginning and 91.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 00:48:54,707 INFO L168 Benchmark]: RCFGBuilder took 403.53 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 91.6 MB in the beginning and 169.0 MB in the end (delta: -77.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 00:48:54,708 INFO L168 Benchmark]: TraceAbstraction took 33426.95 ms. Allocated memory was 202.4 MB in the beginning and 454.6 MB in the end (delta: 252.2 MB). Free memory was 168.4 MB in the beginning and 229.9 MB in the end (delta: -61.5 MB). Peak memory consumption was 335.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:48:54,710 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.69 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 319.14 ms. Allocated memory is still 145.8 MB. Free memory was 102.5 MB in the beginning and 92.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.12 ms. Allocated memory is still 145.8 MB. Free memory was 92.9 MB in the beginning and 91.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 403.53 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 91.6 MB in the beginning and 169.0 MB in the end (delta: -77.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 33426.95 ms. Allocated memory was 202.4 MB in the beginning and 454.6 MB in the end (delta: 252.2 MB). Free memory was 168.4 MB in the beginning and 229.9 MB in the end (delta: -61.5 MB). Peak memory consumption was 335.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 30.2s, OverallIterations: 25, TraceHistogramMax: 11, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 707 SDtfs, 791 SDslu, 4724 SDs, 0 SdLazy, 3898 SolverSat, 554 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4445 GetRequests, 3901 SyntacticMatches, 181 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 25 MinimizatonAttempts, 340 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 134 PreInvPairs, 1204 NumberOfFragments, 102 HoareAnnotationTreeSize, 134 FomulaSimplifications, 3894644 FormulaSimplificationTreeSizeReduction, 2.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 2083 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 17.0s InterpolantComputationTime, 2197 NumberOfCodeBlocks, 1420 NumberOfCodeBlocksAsserted, 62 NumberOfCheckSat, 4319 ConstructedInterpolants, 0 QuantifiedInterpolants, 827309 SizeOfPredicates, 108 NumberOfNonLiveVariables, 3172 ConjunctsInSsa, 284 ConjunctsInUnsatCore, 48 InterpolantComputations, 2 PerfectInterpolantSequences, 8076/10394 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 correct! Received shutdown request...