/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_VARIABLES --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/Addition01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:45:03,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:45:03,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:45:03,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:45:03,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:45:03,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:45:03,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:45:03,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:45:03,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:45:03,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:45:03,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:45:03,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:45:03,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:45:03,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:45:03,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:45:03,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:45:03,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:45:03,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:45:03,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:45:03,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:45:03,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:45:03,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:45:03,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:45:03,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:45:03,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:45:03,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:45:03,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:45:03,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:45:03,241 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 15:45:03,271 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:45:03,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:45:03,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:45:03,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:45:03,278 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:45:03,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:45:03,278 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:45:03,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:45:03,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:45:03,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:45:03,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:45:03,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:45:03,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:45:03,282 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:45:03,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:45:03,282 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:45:03,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:45:03,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:45:03,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:45:03,283 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:45:03,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:45:03,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:45:03,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:45:03,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:45:03,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:45:03,287 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:45:03,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:03,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:45:03,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:45:03,288 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_VARIABLES 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 15:45:03,575 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:45:03,589 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:45:03,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:45:03,594 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:45:03,594 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:45:03,595 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition01-2.c [2020-07-21 15:45:03,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4db425500/085df3d0d617499ab2b23f0ff5c417bc/FLAG99266a289 [2020-07-21 15:45:04,095 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:45:04,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition01-2.c [2020-07-21 15:45:04,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4db425500/085df3d0d617499ab2b23f0ff5c417bc/FLAG99266a289 [2020-07-21 15:45:04,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4db425500/085df3d0d617499ab2b23f0ff5c417bc [2020-07-21 15:45:04,530 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:45:04,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:45:04,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:04,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:45:04,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:45:04,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:04" (1/1) ... [2020-07-21 15:45:04,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c612bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:04, skipping insertion in model container [2020-07-21 15:45:04,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:04" (1/1) ... [2020-07-21 15:45:04,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:45:04,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:45:04,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:04,748 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:45:04,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:04,777 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:45:04,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:04 WrapperNode [2020-07-21 15:45:04,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:04,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:45:04,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:45:04,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:45:04,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:04" (1/1) ... [2020-07-21 15:45:04,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:04" (1/1) ... [2020-07-21 15:45:04,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:04" (1/1) ... [2020-07-21 15:45:04,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:04" (1/1) ... [2020-07-21 15:45:04,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:04" (1/1) ... [2020-07-21 15:45:04,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:04" (1/1) ... [2020-07-21 15:45:04,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:04" (1/1) ... [2020-07-21 15:45:04,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:45:04,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:45:04,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:45:04,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:45:04,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:04" (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 15:45:04,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:45:04,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:45:04,957 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-07-21 15:45:04,957 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:45:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:45:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:45:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-07-21 15:45:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:45:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:45:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:45:05,150 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:45:05,151 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 15:45:05,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:05 BoogieIcfgContainer [2020-07-21 15:45:05,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:45:05,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:45:05,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:45:05,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:45:05,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:45:04" (1/3) ... [2020-07-21 15:45:05,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1470a58c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:05, skipping insertion in model container [2020-07-21 15:45:05,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:04" (2/3) ... [2020-07-21 15:45:05,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1470a58c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:05, skipping insertion in model container [2020-07-21 15:45:05,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:05" (3/3) ... [2020-07-21 15:45:05,164 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition01-2.c [2020-07-21 15:45:05,175 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:45:05,183 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:45:05,208 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:45:05,276 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:45:05,277 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:45:05,277 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:45:05,278 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:45:05,278 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:45:05,278 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:45:05,278 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:45:05,278 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:45:05,309 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-21 15:45:05,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 15:45:05,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:05,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:05,317 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:05,322 INFO L82 PathProgramCache]: Analyzing trace with hash -854965079, now seen corresponding path program 1 times [2020-07-21 15:45:05,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:05,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134672616] [2020-07-21 15:45:05,330 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 15:45:05,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:05,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:05,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 15:45:05,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:05,511 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 15:45:05,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:05,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134672616] [2020-07-21 15:45:05,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:05,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 15:45:05,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73915675] [2020-07-21 15:45:05,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:45:05,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:05,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:45:05,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:05,535 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-07-21 15:45:05,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:05,703 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-07-21 15:45:05,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:05,706 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-21 15:45:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:05,717 INFO L225 Difference]: With dead ends: 38 [2020-07-21 15:45:05,718 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 15:45:05,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 15:45:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 15:45:05,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 15:45:05,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 15:45:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-21 15:45:05,774 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-07-21 15:45:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:05,775 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-21 15:45:05,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:45:05,775 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-21 15:45:05,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 15:45:05,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:05,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:05,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:05,992 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:05,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:05,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1632999070, now seen corresponding path program 1 times [2020-07-21 15:45:05,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:05,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707580014] [2020-07-21 15:45:05,995 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 15:45:06,027 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:06,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:06,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 15:45:06,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:06,062 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 15:45:06,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:06,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707580014] [2020-07-21 15:45:06,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:06,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 15:45:06,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435240638] [2020-07-21 15:45:06,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 15:45:06,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:06,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 15:45:06,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:45:06,070 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2020-07-21 15:45:06,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:06,114 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-07-21 15:45:06,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 15:45:06,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-21 15:45:06,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:06,118 INFO L225 Difference]: With dead ends: 34 [2020-07-21 15:45:06,120 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 15:45:06,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:45:06,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 15:45:06,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-21 15:45:06,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 15:45:06,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-21 15:45:06,137 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2020-07-21 15:45:06,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:06,137 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-21 15:45:06,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 15:45:06,138 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-21 15:45:06,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 15:45:06,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:06,140 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:06,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:06,341 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:06,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:06,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1746800232, now seen corresponding path program 1 times [2020-07-21 15:45:06,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:06,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722508047] [2020-07-21 15:45:06,344 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 15:45:06,381 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:06,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:06,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 15:45:06,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:06,520 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 15:45:06,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:06,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:06,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:06,929 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 15:45:06,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722508047] [2020-07-21 15:45:06,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:06,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-07-21 15:45:06,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628721642] [2020-07-21 15:45:06,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 15:45:06,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:06,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 15:45:06,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:45:06,932 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 17 states. [2020-07-21 15:45:07,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:07,257 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-07-21 15:45:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 15:45:07,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2020-07-21 15:45:07,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:07,259 INFO L225 Difference]: With dead ends: 38 [2020-07-21 15:45:07,259 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 15:45:07,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-07-21 15:45:07,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 15:45:07,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-07-21 15:45:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 15:45:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-21 15:45:07,268 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2020-07-21 15:45:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:07,269 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-21 15:45:07,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 15:45:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-21 15:45:07,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 15:45:07,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:07,271 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:07,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:07,485 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:07,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:07,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1365148867, now seen corresponding path program 1 times [2020-07-21 15:45:07,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:07,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909761011] [2020-07-21 15:45:07,487 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 15:45:07,530 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:07,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:07,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-21 15:45:07,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:07,626 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 15:45:07,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:07,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:07,959 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 15:45:07,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909761011] [2020-07-21 15:45:07,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:07,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-07-21 15:45:07,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457603511] [2020-07-21 15:45:07,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:45:07,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:07,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:45:07,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:45:07,963 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 14 states. [2020-07-21 15:45:08,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:08,202 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-07-21 15:45:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 15:45:08,203 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-07-21 15:45:08,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:08,204 INFO L225 Difference]: With dead ends: 39 [2020-07-21 15:45:08,204 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 15:45:08,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:45:08,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 15:45:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-07-21 15:45:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 15:45:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-07-21 15:45:08,213 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 23 [2020-07-21 15:45:08,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:08,214 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-07-21 15:45:08,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:45:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-07-21 15:45:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 15:45:08,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:08,216 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:08,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:08,430 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash -716524734, now seen corresponding path program 1 times [2020-07-21 15:45:08,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:08,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965054163] [2020-07-21 15:45:08,433 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 15:45:08,462 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:08,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:08,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:45:08,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 15:45:08,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:08,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965054163] [2020-07-21 15:45:08,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:08,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 15:45:08,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282611501] [2020-07-21 15:45:08,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:45:08,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:08,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:45:08,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:08,499 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 6 states. [2020-07-21 15:45:08,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:08,563 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2020-07-21 15:45:08,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:08,564 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-07-21 15:45:08,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:08,565 INFO L225 Difference]: With dead ends: 37 [2020-07-21 15:45:08,566 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 15:45:08,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-21 15:45:08,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 15:45:08,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-21 15:45:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 15:45:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-07-21 15:45:08,572 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 30 [2020-07-21 15:45:08,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:08,573 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-07-21 15:45:08,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:45:08,573 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-07-21 15:45:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 15:45:08,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:08,574 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:08,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:08,782 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:08,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:08,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1459427924, now seen corresponding path program 2 times [2020-07-21 15:45:08,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:08,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384047040] [2020-07-21 15:45:08,784 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 15:45:08,814 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:08,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:08,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:45:08,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 15:45:08,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:08,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384047040] [2020-07-21 15:45:08,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:08,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 15:45:08,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164880599] [2020-07-21 15:45:08,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:45:08,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:08,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:45:08,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:08,855 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2020-07-21 15:45:08,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:08,911 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-07-21 15:45:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:08,912 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-07-21 15:45:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:08,913 INFO L225 Difference]: With dead ends: 26 [2020-07-21 15:45:08,913 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 15:45:08,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-21 15:45:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 15:45:08,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 15:45:08,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 15:45:08,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 15:45:08,915 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2020-07-21 15:45:08,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:08,915 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 15:45:08,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:45:08,915 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 15:45:08,915 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 15:45:09,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:09,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 15:45:09,259 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 15:45:09,259 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:45:09,259 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:45:09,259 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 15:45:09,260 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 15:45:09,260 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 15:45:09,260 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-21 15:45:09,260 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 45) the Hoare annotation is: true [2020-07-21 15:45:09,260 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-21 15:45:09,260 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 45) no Hoare annotation was computed. [2020-07-21 15:45:09,260 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 45) no Hoare annotation was computed. [2020-07-21 15:45:09,261 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-21 15:45:09,261 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-21 15:45:09,261 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-21 15:45:09,261 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-21 15:45:09,261 INFO L268 CegarLoopResult]: For program point L34(lines 34 38) no Hoare annotation was computed. [2020-07-21 15:45:09,261 INFO L268 CegarLoopResult]: For program point additionFINAL(lines 13 23) no Hoare annotation was computed. [2020-07-21 15:45:09,261 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= |addition_#in~n| addition_~n) (= |addition_#in~m| addition_~m) (<= addition_~n |addition_#in~n|) (< addition_~n 0)) [2020-07-21 15:45:09,262 INFO L268 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2020-07-21 15:45:09,262 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-21 15:45:09,262 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (<= |addition_#in~n| addition_~n) (= |addition_#in~m| addition_~m) (<= addition_~n |addition_#in~n|) (< 0 addition_~n)) [2020-07-21 15:45:09,262 INFO L268 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-07-21 15:45:09,262 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-07-21 15:45:09,262 INFO L271 CegarLoopResult]: At program point additionENTRY(lines 13 23) the Hoare annotation is: true [2020-07-21 15:45:09,262 INFO L268 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-07-21 15:45:09,263 INFO L268 CegarLoopResult]: For program point additionEXIT(lines 13 23) no Hoare annotation was computed. [2020-07-21 15:45:09,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:45:09 BoogieIcfgContainer [2020-07-21 15:45:09,269 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 15:45:09,272 INFO L168 Benchmark]: Toolchain (without parser) took 4738.52 ms. Allocated memory was 140.0 MB in the beginning and 243.3 MB in the end (delta: 103.3 MB). Free memory was 104.4 MB in the beginning and 105.3 MB in the end (delta: -891.4 kB). Peak memory consumption was 102.4 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:09,273 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 15:45:09,274 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.14 ms. Allocated memory is still 140.0 MB. Free memory was 104.0 MB in the beginning and 94.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:09,275 INFO L168 Benchmark]: Boogie Preprocessor took 27.87 ms. Allocated memory is still 140.0 MB. Free memory was 94.5 MB in the beginning and 93.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:09,276 INFO L168 Benchmark]: RCFGBuilder took 348.42 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 93.1 MB in the beginning and 170.8 MB in the end (delta: -77.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:09,277 INFO L168 Benchmark]: TraceAbstraction took 4112.50 ms. Allocated memory was 204.5 MB in the beginning and 243.3 MB in the end (delta: 38.8 MB). Free memory was 170.2 MB in the beginning and 105.3 MB in the end (delta: 64.9 MB). Peak memory consumption was 103.7 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:09,281 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.14 ms. Allocated memory is still 140.0 MB. Free memory was 104.0 MB in the beginning and 94.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.87 ms. Allocated memory is still 140.0 MB. Free memory was 94.5 MB in the beginning and 93.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 348.42 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 93.1 MB in the beginning and 170.8 MB in the end (delta: -77.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4112.50 ms. Allocated memory was 204.5 MB in the beginning and 243.3 MB in the end (delta: 38.8 MB). Free memory was 170.2 MB in the beginning and 105.3 MB in the end (delta: 64.9 MB). Peak memory consumption was 103.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 117 SDtfs, 77 SDslu, 380 SDs, 0 SdLazy, 463 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=4, 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, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 16 NumberOfFragments, 32 HoareAnnotationTreeSize, 14 FomulaSimplifications, 53 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 25 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 137 NumberOfCodeBlocks, 119 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 174 ConstructedInterpolants, 0 QuantifiedInterpolants, 13594 SizeOfPredicates, 30 NumberOfNonLiveVariables, 358 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 31/42 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...