/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/sum_10x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:30:47,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:30:47,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:30:47,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 22:30:47,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:30:47,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:30:47,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:30:47,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:30:47,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:30:47,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:30:47,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:30:47,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:30:47,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:30:47,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:30:47,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:30:47,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:30:47,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:30:47,714 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:30:47,732 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:30:47,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:30:47,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:30:47,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:30:47,735 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:30:47,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:30:47,736 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:30:47,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:30:47,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:30:47,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:30:47,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:30:47,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:30:47,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:30:47,737 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:30:47,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:30:47,738 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:30:47,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:30:47,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:30:47,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:30:47,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:30:47,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:30:47,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:30:47,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:30:47,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:30:47,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:30:47,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:30:47,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:47,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:30:47,741 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:30:47,741 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:30:48,133 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:30:48,152 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:30:48,158 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:30:48,161 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:30:48,161 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:30:48,164 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-21 22:30:48,255 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bed07bfc9/82b02188d92e4a52a54aa6b2806352b5/FLAG6a576a7a1 [2020-07-21 22:30:48,868 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:30:48,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-21 22:30:48,878 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bed07bfc9/82b02188d92e4a52a54aa6b2806352b5/FLAG6a576a7a1 [2020-07-21 22:30:49,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bed07bfc9/82b02188d92e4a52a54aa6b2806352b5 [2020-07-21 22:30:49,233 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:30:49,237 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:30:49,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:30:49,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:30:49,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:30:49,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:30:49" (1/1) ... [2020-07-21 22:30:49,257 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 10:30:49, skipping insertion in model container [2020-07-21 22:30:49,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:30:49" (1/1) ... [2020-07-21 22:30:49,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:30:49,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:30:49,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:30:49,534 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:30:49,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:30:49,584 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:30:49,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:49 WrapperNode [2020-07-21 22:30:49,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:30:49,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:30:49,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:30:49,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:30:49,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:49" (1/1) ... [2020-07-21 22:30:49,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:49" (1/1) ... [2020-07-21 22:30:49,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:49" (1/1) ... [2020-07-21 22:30:49,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:49" (1/1) ... [2020-07-21 22:30:49,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:49" (1/1) ... [2020-07-21 22:30:49,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:49" (1/1) ... [2020-07-21 22:30:49,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:49" (1/1) ... [2020-07-21 22:30:49,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:30:49,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:30:49,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:30:49,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:30:49,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:30:49,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:30:49,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:30:49,859 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-21 22:30:49,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:30:49,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:30:49,859 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-21 22:30:49,859 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:30:49,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:30:49,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:30:50,064 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:30:50,065 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:30:50,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:30:50 BoogieIcfgContainer [2020-07-21 22:30:50,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:30:50,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:30:50,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:30:50,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:30:50,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:30:49" (1/3) ... [2020-07-21 22:30:50,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d30c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:30:50, skipping insertion in model container [2020-07-21 22:30:50,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:49" (2/3) ... [2020-07-21 22:30:50,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d30c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:30:50, skipping insertion in model container [2020-07-21 22:30:50,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:30:50" (3/3) ... [2020-07-21 22:30:50,082 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-07-21 22:30:50,097 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:30:50,108 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:30:50,159 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:30:50,245 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:30:50,245 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:30:50,246 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:30:50,246 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:30:50,246 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:30:50,249 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:30:50,250 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:30:50,250 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:30:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 22:30:50,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:30:50,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:30:50,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:30:50,290 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:30:50,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:30:50,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-21 22:30:50,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:30:50,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229989550] [2020-07-21 22:30:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:50,393 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:30:50,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:30:50,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:30:50,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:30:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:30:50,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:30:50,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229989550] [2020-07-21 22:30:50,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:30:50,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:30:50,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83558876] [2020-07-21 22:30:50,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:30:50,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:30:50,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:30:50,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:30:50,567 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 22:30:50,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:30:50,694 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-21 22:30:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:30:50,697 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:30:50,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:30:50,709 INFO L225 Difference]: With dead ends: 30 [2020-07-21 22:30:50,709 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 22:30:50,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:30:50,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 22:30:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 22:30:50,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 22:30:50,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 22:30:50,776 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 22:30:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:30:50,777 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 22:30:50,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:30:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 22:30:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 22:30:50,780 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:30:50,781 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:30:50,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:50,994 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:30:50,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:30:50,995 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-21 22:30:50,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:30:50,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708346873] [2020-07-21 22:30:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:51,034 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:30:51,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:30:51,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:30:51,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:30:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 22:30:51,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:30:51,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:30:51,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708346873] [2020-07-21 22:30:51,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:30:51,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 22:30:51,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656706752] [2020-07-21 22:30:51,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 22:30:51,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:30:51,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 22:30:51,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 22:30:51,390 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-07-21 22:30:51,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:30:51,488 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-21 22:30:51,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:30:51,489 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-07-21 22:30:51,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:30:51,491 INFO L225 Difference]: With dead ends: 25 [2020-07-21 22:30:51,491 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 22:30:51,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:30:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 22:30:51,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 22:30:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 22:30:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-21 22:30:51,502 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-21 22:30:51,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:30:51,503 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-21 22:30:51,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 22:30:51,504 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-21 22:30:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 22:30:51,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:30:51,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:30:51,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:51,720 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:30:51,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:30:51,722 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-21 22:30:51,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:30:51,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359766799] [2020-07-21 22:30:51,723 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 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:51,770 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:30:51,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:30:51,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:30:51,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:30:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 22:30:51,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:30:52,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:52,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:52,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:52,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 22:30:52,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359766799] [2020-07-21 22:30:52,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:30:52,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 22:30:52,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965374172] [2020-07-21 22:30:52,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:30:52,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:30:52,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:30:52,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:30:52,290 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-07-21 22:30:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:30:52,392 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-21 22:30:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:30:52,393 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-07-21 22:30:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:30:52,394 INFO L225 Difference]: With dead ends: 28 [2020-07-21 22:30:52,394 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 22:30:52,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:30:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 22:30:52,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 22:30:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 22:30:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 22:30:52,402 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-21 22:30:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:30:52,402 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 22:30:52,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:30:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 22:30:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 22:30:52,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:30:52,404 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:30:52,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:52,605 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:30:52,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:30:52,606 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-21 22:30:52,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:30:52,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728446848] [2020-07-21 22:30:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:52,660 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:30:52,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:30:52,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:30:52,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:30:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 22:30:52,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:30:53,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:53,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:53,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:53,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:53,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 22:30:53,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728446848] [2020-07-21 22:30:53,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:30:53,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 22:30:53,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908835119] [2020-07-21 22:30:53,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:30:53,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:30:53,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:30:53,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:30:53,384 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2020-07-21 22:30:53,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:30:53,499 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-21 22:30:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:30:53,500 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-07-21 22:30:53,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:30:53,501 INFO L225 Difference]: With dead ends: 31 [2020-07-21 22:30:53,501 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 22:30:53,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:30:53,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 22:30:53,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 22:30:53,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 22:30:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-21 22:30:53,510 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-21 22:30:53,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:30:53,511 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-21 22:30:53,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:30:53,511 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-21 22:30:53,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 22:30:53,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:30:53,513 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:30:53,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:53,721 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:30:53,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:30:53,722 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-21 22:30:53,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:30:53,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491288852] [2020-07-21 22:30:53,724 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:53,775 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:30:53,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:30:53,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:30:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:30:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-21 22:30:53,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:30:54,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:54,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:54,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:54,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:54,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 22:30:54,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491288852] [2020-07-21 22:30:54,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:30:54,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 22:30:54,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018753852] [2020-07-21 22:30:54,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:30:54,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:30:54,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:30:54,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:30:54,828 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 15 states. [2020-07-21 22:30:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:30:54,954 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-21 22:30:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:30:54,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-07-21 22:30:54,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:30:54,960 INFO L225 Difference]: With dead ends: 34 [2020-07-21 22:30:54,960 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 22:30:54,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:30:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 22:30:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 22:30:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:30:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-21 22:30:54,967 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-21 22:30:54,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:30:54,968 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-21 22:30:54,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:30:54,968 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-21 22:30:54,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-21 22:30:54,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:30:54,970 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:30:55,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:55,171 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:30:55,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:30:55,172 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-21 22:30:55,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:30:55,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690004371] [2020-07-21 22:30:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:55,222 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:30:55,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:30:55,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:30:55,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:30:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 22:30:55,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:30:56,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:56,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:56,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:56,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:56,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:56,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:56,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 22:30:56,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690004371] [2020-07-21 22:30:56,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:30:56,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 22:30:56,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015968984] [2020-07-21 22:30:56,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:30:56,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:30:56,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:30:56,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:30:56,799 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2020-07-21 22:30:56,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:30:56,961 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-21 22:30:56,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:30:56,962 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-07-21 22:30:56,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:30:56,964 INFO L225 Difference]: With dead ends: 37 [2020-07-21 22:30:56,964 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 22:30:56,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:30:56,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 22:30:56,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 22:30:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 22:30:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-21 22:30:56,973 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-21 22:30:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:30:56,973 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-21 22:30:56,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:30:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-21 22:30:56,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-21 22:30:56,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:30:56,976 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:30:57,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:57,180 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:30:57,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:30:57,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-21 22:30:57,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:30:57,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709404274] [2020-07-21 22:30:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:57,239 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:30:57,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:30:57,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:30:57,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:30:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-21 22:30:57,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:30:58,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:58,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:58,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:59,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:59,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:59,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:59,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 22:30:59,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709404274] [2020-07-21 22:30:59,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:30:59,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 22:30:59,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586898262] [2020-07-21 22:30:59,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:30:59,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:30:59,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:30:59,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:30:59,558 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2020-07-21 22:30:59,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:30:59,800 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-21 22:30:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:30:59,802 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-07-21 22:30:59,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:30:59,804 INFO L225 Difference]: With dead ends: 40 [2020-07-21 22:30:59,804 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 22:30:59,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:30:59,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 22:30:59,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 22:30:59,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 22:30:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-21 22:30:59,812 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-21 22:30:59,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:30:59,813 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-21 22:30:59,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:30:59,813 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-21 22:30:59,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 22:30:59,814 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:30:59,815 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:31:00,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:31:00,021 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:31:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:31:00,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-21 22:31:00,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:31:00,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955953380] [2020-07-21 22:31:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:31:00,106 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:31:00,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:31:00,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:31:00,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:31:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-21 22:31:00,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:31:01,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:02,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:02,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:03,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:03,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:03,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:03,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:03,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:03,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-21 22:31:03,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955953380] [2020-07-21 22:31:03,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:31:03,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 22:31:03,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189311199] [2020-07-21 22:31:03,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:31:03,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:31:03,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:31:03,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:31:03,364 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 21 states. [2020-07-21 22:31:03,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:31:03,614 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-21 22:31:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:31:03,630 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-07-21 22:31:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:31:03,632 INFO L225 Difference]: With dead ends: 43 [2020-07-21 22:31:03,633 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 22:31:03,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:31:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 22:31:03,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 22:31:03,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 22:31:03,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-21 22:31:03,640 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-21 22:31:03,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:31:03,641 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-21 22:31:03,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:31:03,641 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-21 22:31:03,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-21 22:31:03,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:31:03,643 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:31:03,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:31:03,850 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:31:03,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:31:03,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-21 22:31:03,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:31:03,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935583804] [2020-07-21 22:31:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:31:03,965 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:31:03,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:31:03,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:31:03,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:31:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-21 22:31:04,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:31:06,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:06,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:07,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:07,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:07,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:07,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:07,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:08,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:08,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:08,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:08,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:08,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:08,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:08,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-21 22:31:08,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935583804] [2020-07-21 22:31:08,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:31:08,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 22:31:08,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047755003] [2020-07-21 22:31:08,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:31:08,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:31:08,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:31:08,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:31:08,638 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 23 states. [2020-07-21 22:31:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:31:08,884 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-21 22:31:08,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:31:08,885 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-07-21 22:31:08,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:31:08,887 INFO L225 Difference]: With dead ends: 46 [2020-07-21 22:31:08,887 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 22:31:08,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:31:08,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 22:31:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-21 22:31:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 22:31:08,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-21 22:31:08,895 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-21 22:31:08,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:31:08,896 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-21 22:31:08,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:31:08,896 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-21 22:31:08,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 22:31:08,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:31:08,898 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:31:09,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:31:09,105 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:31:09,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:31:09,106 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-21 22:31:09,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:31:09,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886540078] [2020-07-21 22:31:09,107 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:31:09,262 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:31:09,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:31:09,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:31:09,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:31:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-21 22:31:09,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:31:12,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:12,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:13,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:14,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:14,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:15,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:15,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:15,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:15,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:15,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:15,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:15,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:15,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-21 22:31:15,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886540078] [2020-07-21 22:31:15,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:31:15,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-21 22:31:15,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736362332] [2020-07-21 22:31:15,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 22:31:15,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:31:15,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 22:31:15,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:31:15,936 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2020-07-21 22:31:16,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:31:16,183 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-21 22:31:16,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:31:16,184 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-07-21 22:31:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:31:16,186 INFO L225 Difference]: With dead ends: 49 [2020-07-21 22:31:16,186 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 22:31:16,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 22:31:16,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 22:31:16,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-21 22:31:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:31:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-21 22:31:16,194 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-21 22:31:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:31:16,195 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-21 22:31:16,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 22:31:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-21 22:31:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-21 22:31:16,197 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:31:16,197 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:31:16,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:31:16,407 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:31:16,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:31:16,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-21 22:31:16,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:31:16,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835715115] [2020-07-21 22:31:16,409 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:31:16,604 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:31:16,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:31:16,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-21 22:31:16,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:31:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 19 proven. 155 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-07-21 22:31:17,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:31:19,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:31:19,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:31:20,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:31:21,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:31:21,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:31:21,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:31:22,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:31:22,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:31:22,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:31:22,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:31:22,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:31:22,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:31:22,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:31:22,579 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 22:31:22,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:22,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:31:22,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:22,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:31:22,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-07-21 22:31:22,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835715115] [2020-07-21 22:31:22,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:31:22,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 34 [2020-07-21 22:31:22,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372196626] [2020-07-21 22:31:22,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 22:31:22,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:31:22,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 22:31:22,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1046, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 22:31:22,782 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 34 states. [2020-07-21 22:31:24,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:31:24,591 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-21 22:31:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-21 22:31:24,592 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 73 [2020-07-21 22:31:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:31:24,593 INFO L225 Difference]: With dead ends: 52 [2020-07-21 22:31:24,594 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 22:31:24,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 101 SyntacticMatches, 12 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=270, Invalid=2810, Unknown=0, NotChecked=0, Total=3080 [2020-07-21 22:31:24,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 22:31:24,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-21 22:31:24,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 22:31:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-21 22:31:24,605 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-21 22:31:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:31:24,605 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-21 22:31:24,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 22:31:24,606 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-21 22:31:24,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-21 22:31:24,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:31:24,607 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:31:24,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:31:24,813 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:31:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:31:24,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-21 22:31:24,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:31:24,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405049730] [2020-07-21 22:31:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:31:25,028 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:31:25,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:31:25,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 22:31:25,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:31:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 21 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-07-21 22:31:25,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:31:29,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:31,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:31,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:32,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:32,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:33,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:33,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:34,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:34,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:34,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:34,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:34,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:34,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:35,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:35,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:35,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:35,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 22:31:35,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405049730] [2020-07-21 22:31:35,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:31:35,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 26 [2020-07-21 22:31:35,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999480539] [2020-07-21 22:31:35,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 22:31:35,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:31:35,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 22:31:35,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:31:35,485 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 26 states. [2020-07-21 22:31:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:31:35,865 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-07-21 22:31:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:31:35,867 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 79 [2020-07-21 22:31:35,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:31:35,867 INFO L225 Difference]: With dead ends: 48 [2020-07-21 22:31:35,867 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:31:35,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 23 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=456, Invalid=876, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 22:31:35,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:31:35,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:31:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:31:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:31:35,870 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2020-07-21 22:31:35,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:31:35,870 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:31:35,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 22:31:35,871 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:31:35,871 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:31:36,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:31:36,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:31:36,224 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 22:31:36,224 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:31:36,224 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:31:36,224 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 22:31:36,225 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:31:36,225 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:31:36,225 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-21 22:31:36,225 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (< 0 sum_~n) (<= |sum_#in~n| sum_~n)) [2020-07-21 22:31:36,227 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-21 22:31:36,227 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-21 22:31:36,228 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-21 22:31:36,228 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-21 22:31:36,228 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-21 22:31:36,228 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-21 22:31:36,228 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-21 22:31:36,228 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-21 22:31:36,228 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-21 22:31:36,229 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= 10 main_~a~0) [2020-07-21 22:31:36,229 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-21 22:31:36,229 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-21 22:31:36,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:31:36 BoogieIcfgContainer [2020-07-21 22:31:36,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:31:36,252 INFO L168 Benchmark]: Toolchain (without parser) took 47009.10 ms. Allocated memory was 144.2 MB in the beginning and 455.1 MB in the end (delta: 310.9 MB). Free memory was 102.2 MB in the beginning and 150.1 MB in the end (delta: -47.9 MB). Peak memory consumption was 263.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:31:36,253 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 22:31:36,255 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.18 ms. Allocated memory is still 144.2 MB. Free memory was 101.7 MB in the beginning and 92.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:31:36,262 INFO L168 Benchmark]: Boogie Preprocessor took 43.21 ms. Allocated memory is still 144.2 MB. Free memory was 92.6 MB in the beginning and 91.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 22:31:36,263 INFO L168 Benchmark]: RCFGBuilder took 438.83 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 91.2 MB in the beginning and 171.0 MB in the end (delta: -79.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 22:31:36,267 INFO L168 Benchmark]: TraceAbstraction took 46169.73 ms. Allocated memory was 202.4 MB in the beginning and 455.1 MB in the end (delta: 252.7 MB). Free memory was 170.3 MB in the beginning and 150.1 MB in the end (delta: 20.2 MB). Peak memory consumption was 272.9 MB. Max. memory is 7.1 GB. [2020-07-21 22:31:36,273 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 342.18 ms. Allocated memory is still 144.2 MB. Free memory was 101.7 MB in the beginning and 92.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.21 ms. Allocated memory is still 144.2 MB. Free memory was 92.6 MB in the beginning and 91.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 438.83 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 91.2 MB in the beginning and 171.0 MB in the end (delta: -79.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 46169.73 ms. Allocated memory was 202.4 MB in the beginning and 455.1 MB in the end (delta: 252.7 MB). Free memory was 170.3 MB in the beginning and 150.1 MB in the end (delta: 20.2 MB). Peak memory consumption was 272.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 45.8s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 174 SDtfs, 588 SDslu, 1275 SDs, 0 SdLazy, 1311 SolverSat, 275 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1178 GetRequests, 753 SyntacticMatches, 144 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 21 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 37.8s InterpolantComputationTime, 552 NumberOfCodeBlocks, 378 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1068 ConstructedInterpolants, 0 QuantifiedInterpolants, 212976 SizeOfPredicates, 95 NumberOfNonLiveVariables, 1236 ConjunctsInSsa, 251 ConjunctsInUnsatCore, 23 InterpolantComputations, 1 PerfectInterpolantSequences, 1512/3168 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...