/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:58:11,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:58:11,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:58:11,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:58:11,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:58:11,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:58:11,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:58:11,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:58:11,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:58:11,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:58:11,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:58:11,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:58:11,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:58:11,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:58:11,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:58:11,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:58:11,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:58:11,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:58:11,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:58:11,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:58:11,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:58:11,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:58:11,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:58:11,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:58:11,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:58:11,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:58:11,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:58:11,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:58:11,824 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 12:58:11,866 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:58:11,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:58:11,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:58:11,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:58:11,869 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:58:11,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:58:11,870 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:58:11,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:58:11,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:58:11,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:58:11,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:58:11,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:58:11,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:58:11,874 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:58:11,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:58:11,874 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:58:11,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:58:11,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:58:11,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:58:11,875 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:58:11,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:58:11,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:58:11,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:58:11,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:58:11,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:58:11,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:58:11,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:11,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:58:11,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:58:11,877 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 12:58:12,280 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:58:12,296 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:58:12,299 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:58:12,301 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:58:12,302 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:58:12,303 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-07-21 12:58:12,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad23dd1a0/315ea8a3e6a94075a8062ed8c5bf49f6/FLAG38c1808f5 [2020-07-21 12:58:12,891 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:58:12,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-07-21 12:58:12,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad23dd1a0/315ea8a3e6a94075a8062ed8c5bf49f6/FLAG38c1808f5 [2020-07-21 12:58:13,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad23dd1a0/315ea8a3e6a94075a8062ed8c5bf49f6 [2020-07-21 12:58:13,248 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:58:13,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:58:13,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:58:13,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:58:13,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:58:13,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:58:13" (1/1) ... [2020-07-21 12:58:13,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b27b408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:58:13, skipping insertion in model container [2020-07-21 12:58:13,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:58:13" (1/1) ... [2020-07-21 12:58:13,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:58:13,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:58:13,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:58:13,537 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:58:13,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:58:13,574 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:58:13,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:58:13 WrapperNode [2020-07-21 12:58:13,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:58:13,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:58:13,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:58:13,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:58:13,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:58:13" (1/1) ... [2020-07-21 12:58:13,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:58:13" (1/1) ... [2020-07-21 12:58:13,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:58:13" (1/1) ... [2020-07-21 12:58:13,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:58:13" (1/1) ... [2020-07-21 12:58:13,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:58:13" (1/1) ... [2020-07-21 12:58:13,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:58:13" (1/1) ... [2020-07-21 12:58:13,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:58:13" (1/1) ... [2020-07-21 12:58:13,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:58:13,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:58:13,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:58:13,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:58:13,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:58:13" (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 12:58:13,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:58:13,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:58:13,887 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-21 12:58:13,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:58:13,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:58:13,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:58:13,889 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-21 12:58:13,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:58:13,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:58:13,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:58:14,085 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:58:14,086 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:58:14,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:58:14 BoogieIcfgContainer [2020-07-21 12:58:14,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:58:14,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:58:14,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:58:14,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:58:14,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:58:13" (1/3) ... [2020-07-21 12:58:14,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa3b62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:58:14, skipping insertion in model container [2020-07-21 12:58:14,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:58:13" (2/3) ... [2020-07-21 12:58:14,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa3b62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:58:14, skipping insertion in model container [2020-07-21 12:58:14,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:58:14" (3/3) ... [2020-07-21 12:58:14,103 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-07-21 12:58:14,116 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:58:14,126 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:58:14,143 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:58:14,173 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:58:14,174 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:58:14,174 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:58:14,174 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:58:14,174 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:58:14,174 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:58:14,175 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:58:14,175 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:58:14,195 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 12:58:14,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 12:58:14,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:14,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:14,205 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:14,213 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2020-07-21 12:58:14,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:14,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064781043] [2020-07-21 12:58:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:58:14,307 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:14,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:14,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:58:14,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:14,482 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 12:58:14,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:58:14,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064781043] [2020-07-21 12:58:14,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:58:14,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 12:58:14,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394814944] [2020-07-21 12:58:14,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 12:58:14,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:14,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 12:58:14,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:58:14,516 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-07-21 12:58:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:14,679 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-21 12:58:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:58:14,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-21 12:58:14,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:14,695 INFO L225 Difference]: With dead ends: 33 [2020-07-21 12:58:14,696 INFO L226 Difference]: Without dead ends: 19 [2020-07-21 12:58:14,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:58:14,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-21 12:58:14,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-21 12:58:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 12:58:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-07-21 12:58:14,758 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-07-21 12:58:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:14,758 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-07-21 12:58:14,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 12:58:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-21 12:58:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 12:58:14,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:14,762 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:14,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:14,977 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:14,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:14,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2020-07-21 12:58:14,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:14,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597540992] [2020-07-21 12:58:14,979 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:58:15,016 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:15,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:15,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 12:58:15,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:15,218 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 12:58:15,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:58:15,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:15,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:45,648 WARN L193 SmtUtils]: Spent 10.10 s on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 12:59:01,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:03,572 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 12:59:03,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597540992] [2020-07-21 12:59:03,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:59:03,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2020-07-21 12:59:03,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237570538] [2020-07-21 12:59:03,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 12:59:03,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:59:03,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 12:59:03,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=160, Unknown=11, NotChecked=0, Total=210 [2020-07-21 12:59:03,585 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 15 states. [2020-07-21 12:59:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:59:12,259 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-07-21 12:59:12,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:59:12,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-07-21 12:59:12,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:59:12,263 INFO L225 Difference]: With dead ends: 31 [2020-07-21 12:59:12,263 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 12:59:12,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 56.4s TimeCoverageRelationStatistics Valid=76, Invalid=289, Unknown=15, NotChecked=0, Total=380 [2020-07-21 12:59:12,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 12:59:12,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 12:59:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 12:59:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-07-21 12:59:12,273 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2020-07-21 12:59:12,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:59:12,273 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-07-21 12:59:12,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 12:59:12,274 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-07-21 12:59:12,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 12:59:12,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:59:12,276 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:59:12,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:12,478 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:59:12,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:59:12,480 INFO L82 PathProgramCache]: Analyzing trace with hash -547108535, now seen corresponding path program 2 times [2020-07-21 12:59:12,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:59:12,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622905633] [2020-07-21 12:59:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:59:12,519 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:59:12,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:59:12,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 12:59:12,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:59:15,351 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 12:59:15,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:59:16,207 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 12:59:16,424 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 12:59:17,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622905633] [2020-07-21 12:59:17,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 12:59:17,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-21 12:59:17,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388783648] [2020-07-21 12:59:17,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 12:59:17,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:59:17,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 12:59:17,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=223, Unknown=1, NotChecked=0, Total=272 [2020-07-21 12:59:17,508 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 12 states. [2020-07-21 12:59:25,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:59:25,655 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-07-21 12:59:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:59:25,658 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-07-21 12:59:25,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:59:25,661 INFO L225 Difference]: With dead ends: 32 [2020-07-21 12:59:25,661 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 12:59:25,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=90, Invalid=461, Unknown=1, NotChecked=0, Total=552 [2020-07-21 12:59:25,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 12:59:25,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 12:59:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 12:59:25,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-07-21 12:59:25,670 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 32 [2020-07-21 12:59:25,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:59:25,671 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-07-21 12:59:25,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 12:59:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-07-21 12:59:25,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 12:59:25,673 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:59:25,673 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:59:25,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:25,875 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:59:25,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:59:25,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1152432193, now seen corresponding path program 3 times [2020-07-21 12:59:25,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:59:25,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803393796] [2020-07-21 12:59:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:59:25,942 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:59:25,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:59:25,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 12:59:25,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:59:53,281 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 12:59:53,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:59:54,336 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 12:59:54,442 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 12:59:54,566 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 12:59:54,679 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 12:59:54,822 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 12:59:54,963 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 12:59:55,808 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 12:59:56,208 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 12:59:56,321 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 12:59:56,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803393796] [2020-07-21 12:59:56,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 12:59:56,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-21 12:59:56,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458218973] [2020-07-21 12:59:56,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 12:59:56,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:59:56,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 12:59:56,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=274, Unknown=12, NotChecked=0, Total=342 [2020-07-21 12:59:56,501 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-07-21 13:00:53,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:53,599 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-07-21 13:00:53,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 13:00:53,608 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-07-21 13:00:53,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:53,609 INFO L225 Difference]: With dead ends: 35 [2020-07-21 13:00:53,610 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 13:00:53,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 56.1s TimeCoverageRelationStatistics Valid=110, Invalid=628, Unknown=18, NotChecked=0, Total=756 [2020-07-21 13:00:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 13:00:53,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-21 13:00:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 13:00:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-07-21 13:00:53,623 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 38 [2020-07-21 13:00:53,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:53,623 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-07-21 13:00:53,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 13:00:53,623 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-07-21 13:00:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-21 13:00:53,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:53,629 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:00:53,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:53,843 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:53,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:53,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1461718089, now seen corresponding path program 4 times [2020-07-21 13:00:53,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:53,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402558863] [2020-07-21 13:00:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:00:53,903 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:00:53,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:53,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 13:00:53,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:01:48,826 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 13:01:48,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:01:49,893 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 13:01:50,007 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 13:01:50,139 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 13:01:50,264 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 13:01:50,425 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 13:01:50,581 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 13:01:50,753 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 13:01:50,920 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 13:01:51,123 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 13:01:51,311 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 13:01:51,518 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 13:01:51,731 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 13:01:51,963 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 13:01:52,185 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 13:01:53,276 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 13:01:53,391 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 13:01:53,520 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 13:01:53,658 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 13:01:53,819 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 13:01:53,982 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 13:01:54,147 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 13:01:54,312 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 13:01:54,502 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 13:01:54,696 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 13:01:54,826 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 13:01:55,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402558863] [2020-07-21 13:01:55,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:01:55,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-21 13:01:55,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234295636] [2020-07-21 13:01:55,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 13:01:55,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:01:55,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 13:01:55,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=332, Unknown=24, NotChecked=0, Total=420 [2020-07-21 13:01:55,142 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2020-07-21 13:03:33,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:03:33,987 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-07-21 13:03:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 13:03:33,999 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-07-21 13:03:34,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:03:34,001 INFO L225 Difference]: With dead ends: 38 [2020-07-21 13:03:34,001 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 13:03:34,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 107.7s TimeCoverageRelationStatistics Valid=130, Invalid=823, Unknown=39, NotChecked=0, Total=992 [2020-07-21 13:03:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 13:03:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-21 13:03:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 13:03:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-07-21 13:03:34,012 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 44 [2020-07-21 13:03:34,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:03:34,012 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-07-21 13:03:34,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 13:03:34,013 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-07-21 13:03:34,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 13:03:34,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:03:34,015 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:03:34,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:03:34,218 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:03:34,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:03:34,219 INFO L82 PathProgramCache]: Analyzing trace with hash -269168065, now seen corresponding path program 5 times [2020-07-21 13:03:34,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:03:34,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140276307] [2020-07-21 13:03:34,221 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:03:34,330 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:03:34,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:03:34,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-21 13:03:34,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:05:22,860 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 13:05:22,922 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 13:05:22,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:05:23,973 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:24,102 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:24,272 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 13:05:24,437 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 13:05:24,642 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 13:05:24,848 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 13:05:25,066 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 13:05:25,267 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 13:05:25,501 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 13:05:25,721 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 13:05:25,952 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 13:05:26,178 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 13:05:26,428 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 13:05:26,677 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 13:05:26,960 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 13:05:27,242 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 13:05:27,553 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 13:05:27,859 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 13:05:28,188 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 13:05:28,513 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 13:05:28,901 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 13:05:29,258 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 13:05:29,664 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 13:05:30,047 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 13:05:31,090 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 13:05:31,209 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 13:05:31,360 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 13:05:31,500 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 13:05:31,683 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 13:05:31,845 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 13:05:32,041 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 13:05:32,232 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 13:05:32,453 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 13:05:32,676 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 13:05:32,922 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 13:05:33,180 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 13:05:33,456 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 13:05:33,731 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 13:05:34,034 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 13:05:34,329 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 13:05:34,664 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 13:05:34,987 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 13:05:35,205 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 13:05:35,462 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 13:05:35,657 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 13:05:35,842 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 13:05:35,979 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 13:05:36,114 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 13:05:36,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140276307] [2020-07-21 13:05:36,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:05:36,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-21 13:05:36,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084994865] [2020-07-21 13:05:36,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 13:05:36,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:05:36,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 13:05:36,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=392, Unknown=42, NotChecked=0, Total=506 [2020-07-21 13:05:36,466 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states. [2020-07-21 13:09:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:09:42,817 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-07-21 13:09:42,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 13:09:42,833 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-07-21 13:09:42,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:09:42,835 INFO L225 Difference]: With dead ends: 41 [2020-07-21 13:09:42,835 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 13:09:42,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 241.6s TimeCoverageRelationStatistics Valid=150, Invalid=1032, Unknown=78, NotChecked=0, Total=1260 [2020-07-21 13:09:42,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 13:09:42,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-21 13:09:42,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 13:09:42,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-07-21 13:09:42,846 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 50 [2020-07-21 13:09:42,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:09:42,847 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-07-21 13:09:42,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 13:09:42,847 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-07-21 13:09:42,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 13:09:42,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:09:42,850 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:09:43,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:09:43,066 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:09:43,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:09:43,067 INFO L82 PathProgramCache]: Analyzing trace with hash 585432905, now seen corresponding path program 6 times [2020-07-21 13:09:43,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:09:43,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527877843] [2020-07-21 13:09:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:09:43,170 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:09:43,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:09:43,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 13:09:43,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:11:07,291 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-07-21 13:11:07,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527877843] [2020-07-21 13:11:07,293 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-07-21 13:11:07,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:11:07,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-07-21 13:11:07,293 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-07-21 13:11:07,293 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 13:11:07,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:11:07,517 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-21 13:11:07,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:11:07 BoogieIcfgContainer [2020-07-21 13:11:07,517 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:11:07,519 INFO L168 Benchmark]: Toolchain (without parser) took 774269.33 ms. Allocated memory was 138.4 MB in the beginning and 232.3 MB in the end (delta: 93.8 MB). Free memory was 102.5 MB in the beginning and 123.6 MB in the end (delta: -21.1 MB). Peak memory consumption was 72.7 MB. Max. memory is 7.1 GB. [2020-07-21 13:11:07,522 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 13:11:07,523 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.51 ms. Allocated memory is still 138.4 MB. Free memory was 102.0 MB in the beginning and 92.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-21 13:11:07,524 INFO L168 Benchmark]: Boogie Preprocessor took 207.93 ms. Allocated memory was 138.4 MB in the beginning and 207.1 MB in the end (delta: 68.7 MB). Free memory was 92.7 MB in the beginning and 186.4 MB in the end (delta: -93.7 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-21 13:11:07,524 INFO L168 Benchmark]: RCFGBuilder took 305.56 ms. Allocated memory is still 207.1 MB. Free memory was 186.4 MB in the beginning and 174.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-07-21 13:11:07,525 INFO L168 Benchmark]: TraceAbstraction took 773424.56 ms. Allocated memory was 207.1 MB in the beginning and 232.3 MB in the end (delta: 25.2 MB). Free memory was 173.6 MB in the beginning and 123.6 MB in the end (delta: 50.0 MB). Peak memory consumption was 75.2 MB. Max. memory is 7.1 GB. [2020-07-21 13:11:07,528 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 323.51 ms. Allocated memory is still 138.4 MB. Free memory was 102.0 MB in the beginning and 92.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 207.93 ms. Allocated memory was 138.4 MB in the beginning and 207.1 MB in the end (delta: 68.7 MB). Free memory was 92.7 MB in the beginning and 186.4 MB in the end (delta: -93.7 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 305.56 ms. Allocated memory is still 207.1 MB. Free memory was 186.4 MB in the beginning and 174.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 773424.56 ms. Allocated memory was 207.1 MB in the beginning and 232.3 MB in the end (delta: 25.2 MB). Free memory was 173.6 MB in the beginning and 123.6 MB in the end (delta: 50.0 MB). Peak memory consumption was 75.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 33]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L25] int n = __VERIFIER_nondet_int(); [L26] COND FALSE !(n < 1 || n > 31) [L29] CALL, EXPR hanoi(n) [L17] COND FALSE !(n == 1) [L20] CALL, EXPR hanoi(n-1) [L17] COND FALSE !(n == 1) [L20] CALL, EXPR hanoi(n-1) [L17] COND FALSE !(n == 1) [L20] CALL, EXPR hanoi(n-1) [L17] COND FALSE !(n == 1) [L20] CALL, EXPR hanoi(n-1) [L17] COND FALSE !(n == 1) [L20] CALL, EXPR hanoi(n-1) [L17] COND FALSE !(n == 1) [L20] CALL, EXPR hanoi(n-1) [L17] COND FALSE !(n == 1) [L20] CALL, EXPR hanoi(n-1) [L17] COND TRUE n == 1 [L18] return 1; [L20] RET, EXPR hanoi(n-1) [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) [L20] return 2 * (hanoi(n-1)) + 1; [L29] RET, EXPR hanoi(n) [L29] int result = hanoi(n); [L30] COND FALSE !(result >= n) [L33] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 773.3s, OverallIterations: 7, TraceHistogramMax: 8, AutomataDifference: 419.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 48 SDslu, 785 SDs, 0 SdLazy, 955 SolverSat, 22 SolverUnsat, 82 SolverUnknown, 0 SolverNotchecked, 180.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 290 GetRequests, 152 SyntacticMatches, 3 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 465.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 267.6s InterpolantComputationTime, 198 NumberOfCodeBlocks, 198 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 211 ConstructedInterpolants, 54 QuantifiedInterpolants, 84029 SizeOfPredicates, 38 NumberOfNonLiveVariables, 476 ConjunctsInSsa, 118 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 141/284 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...