/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:24:17,953 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 03:24:17,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:24:17,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:24:17,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:24:17,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:24:17,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:24:17,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:24:17,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:24:17,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:24:17,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:24:17,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:24:17,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:24:17,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:24:17,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:24:18,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:24:18,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:24:18,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:24:18,009 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 [2020-07-20 03:24:18,035 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:24:18,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:24:18,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:24:18,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:24:18,039 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:24:18,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:24:18,039 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:24:18,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:24:18,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:24:18,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:24:18,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:24:18,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:24:18,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:24:18,042 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:24:18,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:24:18,042 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:24:18,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:24:18,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:24:18,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:24:18,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:24:18,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:24:18,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:24:18,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:24:18,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:24:18,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:24:18,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:24:18,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:24:18,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:24:18,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:24:18,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:24:18,356 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:24:18,370 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:24:18,374 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:24:18,376 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:24:18,376 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:24:18,377 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-07-20 03:24:18,446 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e9d73805/32153feff9624bbbbab84bce1c9c9514/FLAGb4a47d0c9 [2020-07-20 03:24:18,946 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:24:18,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-07-20 03:24:18,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e9d73805/32153feff9624bbbbab84bce1c9c9514/FLAGb4a47d0c9 [2020-07-20 03:24:19,337 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e9d73805/32153feff9624bbbbab84bce1c9c9514 [2020-07-20 03:24:19,350 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:24:19,354 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:24:19,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:24:19,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:24:19,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:24:19,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:24:19" (1/1) ... [2020-07-20 03:24:19,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eea5cc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:24:19, skipping insertion in model container [2020-07-20 03:24:19,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:24:19" (1/1) ... [2020-07-20 03:24:19,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:24:19,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:24:19,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:24:19,666 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:24:19,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:24:19,704 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:24:19,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:24:19 WrapperNode [2020-07-20 03:24:19,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:24:19,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:24:19,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:24:19,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:24:19,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:24:19" (1/1) ... [2020-07-20 03:24:19,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:24:19" (1/1) ... [2020-07-20 03:24:19,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:24:19" (1/1) ... [2020-07-20 03:24:19,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:24:19" (1/1) ... [2020-07-20 03:24:19,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:24:19" (1/1) ... [2020-07-20 03:24:19,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:24:19" (1/1) ... [2020-07-20 03:24:19,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:24:19" (1/1) ... [2020-07-20 03:24:19,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:24:19,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:24:19,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:24:19,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:24:19,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:24:19" (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 [2020-07-20 03:24:19,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:24:19,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:24:19,911 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 03:24:19,911 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 03:24:19,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:24:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:24:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:24:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 03:24:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 03:24:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:24:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:24:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:24:20,143 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:24:20,144 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 03:24:20,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:24:20 BoogieIcfgContainer [2020-07-20 03:24:20,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:24:20,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:24:20,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:24:20,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:24:20,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:24:19" (1/3) ... [2020-07-20 03:24:20,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354f1501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:24:20, skipping insertion in model container [2020-07-20 03:24:20,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:24:19" (2/3) ... [2020-07-20 03:24:20,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354f1501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:24:20, skipping insertion in model container [2020-07-20 03:24:20,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:24:20" (3/3) ... [2020-07-20 03:24:20,159 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-07-20 03:24:20,171 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:24:20,180 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:24:20,199 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:24:20,235 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:24:20,235 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:24:20,236 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:24:20,236 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:24:20,236 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:24:20,236 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:24:20,236 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:24:20,237 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:24:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 03:24:20,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 03:24:20,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:24:20,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:24:20,287 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:24:20,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:24:20,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 03:24:20,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:24:20,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749199525] [2020-07-20 03:24:20,314 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fca7099 [2020-07-20 03:24:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:24:20,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749199525] [2020-07-20 03:24:20,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:24:20,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:24:20,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124650387] [2020-07-20 03:24:20,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:24:20,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:24:20,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:24:20,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:24:20,610 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 03:24:20,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:24:20,733 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 03:24:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:24:20,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 03:24:20,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:24:20,747 INFO L225 Difference]: With dead ends: 44 [2020-07-20 03:24:20,748 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 03:24:20,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:24:20,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 03:24:20,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 03:24:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 03:24:20,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 03:24:20,800 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 03:24:20,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:24:20,801 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 03:24:20,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:24:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 03:24:20,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 03:24:20,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:24:20,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:24:20,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:24:20,804 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:24:20,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:24:20,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 03:24:20,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:24:20,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460063674] [2020-07-20 03:24:20,806 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fca7099 [2020-07-20 03:24:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:24:20,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460063674] [2020-07-20 03:24:20,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:24:20,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:24:20,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207201494] [2020-07-20 03:24:20,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:24:20,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:24:20,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:24:20,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:24:20,884 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 03:24:20,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:24:20,965 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 03:24:20,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:24:20,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 03:24:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:24:20,968 INFO L225 Difference]: With dead ends: 36 [2020-07-20 03:24:20,968 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 03:24:20,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:24:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 03:24:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 03:24:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 03:24:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 03:24:20,981 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 03:24:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:24:20,981 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 03:24:20,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:24:20,982 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 03:24:20,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 03:24:20,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:24:20,983 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:24:20,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:24:20,984 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:24:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:24:20,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 03:24:20,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:24:20,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575714306] [2020-07-20 03:24:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fca7099 [2020-07-20 03:24:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:24:21,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575714306] [2020-07-20 03:24:21,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492090754] [2020-07-20 03:24:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5583f90a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:24:21,193 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5583f90a issued 3 check-sat command(s) [2020-07-20 03:24:21,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:24:21,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:24:21,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:24:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:24:21,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:24:21,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 03:24:21,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627915246] [2020-07-20 03:24:21,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:24:21,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:24:21,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:24:21,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:24:21,296 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 03:24:21,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:24:21,531 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-07-20 03:24:21,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:24:21,532 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 03:24:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:24:21,534 INFO L225 Difference]: With dead ends: 58 [2020-07-20 03:24:21,534 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 03:24:21,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:24:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 03:24:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-20 03:24:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 03:24:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-07-20 03:24:21,545 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-07-20 03:24:21,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:24:21,546 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-07-20 03:24:21,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:24:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-07-20 03:24:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 03:24:21,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:24:21,548 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:24:21,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 03:24:21,763 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:24:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:24:21,764 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 03:24:21,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:24:21,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071962079] [2020-07-20 03:24:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fca7099 [2020-07-20 03:24:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 03:24:21,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071962079] [2020-07-20 03:24:21,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897928805] [2020-07-20 03:24:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@561d61f9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:24:21,983 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@561d61f9 issued 4 check-sat command(s) [2020-07-20 03:24:21,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:24:21,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 03:24:21,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:24:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 03:24:22,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:24:22,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-20 03:24:22,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972509498] [2020-07-20 03:24:22,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:24:22,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:24:22,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:24:22,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:24:22,067 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2020-07-20 03:24:22,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:24:22,127 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-07-20 03:24:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:24:22,128 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 03:24:22,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:24:22,130 INFO L225 Difference]: With dead ends: 46 [2020-07-20 03:24:22,130 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 03:24:22,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:24:22,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 03:24:22,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-07-20 03:24:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 03:24:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-07-20 03:24:22,141 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2020-07-20 03:24:22,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:24:22,141 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-07-20 03:24:22,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:24:22,142 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-07-20 03:24:22,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 03:24:22,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:24:22,144 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:24:22,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:24:22,358 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:24:22,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:24:22,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1725129826, now seen corresponding path program 1 times [2020-07-20 03:24:22,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:24:22,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200486425] [2020-07-20 03:24:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fca7099 [2020-07-20 03:24:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 03:24:22,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200486425] [2020-07-20 03:24:22,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377918964] [2020-07-20 03:24:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d18a23b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:24:22,562 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d18a23b issued 4 check-sat command(s) [2020-07-20 03:24:22,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:24:22,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:24:22,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:24:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:24:22,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:24:22,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2020-07-20 03:24:22,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870613497] [2020-07-20 03:24:22,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:24:22,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:24:22,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:24:22,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:24:22,613 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 7 states. [2020-07-20 03:24:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:24:22,733 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2020-07-20 03:24:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:24:22,734 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-20 03:24:22,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:24:22,736 INFO L225 Difference]: With dead ends: 44 [2020-07-20 03:24:22,736 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 03:24:22,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:24:22,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 03:24:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-07-20 03:24:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 03:24:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-07-20 03:24:22,746 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2020-07-20 03:24:22,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:24:22,747 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-07-20 03:24:22,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:24:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-07-20 03:24:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 03:24:22,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:24:22,749 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:24:22,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:24:22,963 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:24:22,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:24:22,964 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 03:24:22,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:24:22,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862980501] [2020-07-20 03:24:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fca7099 [2020-07-20 03:24:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:24:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 03:24:23,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862980501] [2020-07-20 03:24:23,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214969076] [2020-07-20 03:24:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302bd019 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:24:23,186 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302bd019 issued 3 check-sat command(s) [2020-07-20 03:24:23,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:24:23,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 03:24:23,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:24:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 03:24:23,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:24:23,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2020-07-20 03:24:23,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800154186] [2020-07-20 03:24:23,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 03:24:23,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:24:23,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 03:24:23,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:24:23,275 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 12 states. [2020-07-20 03:24:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:24:23,528 INFO L93 Difference]: Finished difference Result 69 states and 101 transitions. [2020-07-20 03:24:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:24:23,529 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 03:24:23,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:24:23,530 INFO L225 Difference]: With dead ends: 69 [2020-07-20 03:24:23,530 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 03:24:23,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:24:23,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 03:24:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 03:24:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 03:24:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 03:24:23,533 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2020-07-20 03:24:23,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:24:23,534 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 03:24:23,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 03:24:23,534 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 03:24:23,534 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 03:24:23,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:24:23,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 03:24:23,892 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 03:24:23,892 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:24:23,892 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:24:23,893 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 03:24:23,893 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 03:24:23,893 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 03:24:23,893 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-20 03:24:23,894 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-20 03:24:23,894 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-20 03:24:23,894 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-20 03:24:23,894 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-20 03:24:23,894 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-20 03:24:23,894 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 2) (<= 2 main_~x~0)) [2020-07-20 03:24:23,895 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-20 03:24:23,895 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-20 03:24:23,895 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-20 03:24:23,895 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (< 1 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2020-07-20 03:24:23,896 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-20 03:24:23,896 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (< 1 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2020-07-20 03:24:23,896 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-20 03:24:23,897 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-20 03:24:23,897 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-20 03:24:23,897 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-20 03:24:23,897 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-20 03:24:23,898 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-20 03:24:23,898 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-07-20 03:24:23,898 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-20 03:24:23,898 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#in~n|) .cse0) (and (<= 1 |fibo1_#t~ret0|) (< 1 fibo1_~n) (<= |fibo1_#t~ret0| 1) .cse0))) [2020-07-20 03:24:23,898 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-20 03:24:23,899 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-20 03:24:23,899 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-20 03:24:23,899 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-20 03:24:23,899 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-20 03:24:23,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:24:23 BoogieIcfgContainer [2020-07-20 03:24:23,910 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:24:23,915 INFO L168 Benchmark]: Toolchain (without parser) took 4561.00 ms. Allocated memory was 137.4 MB in the beginning and 249.6 MB in the end (delta: 112.2 MB). Free memory was 101.8 MB in the beginning and 183.6 MB in the end (delta: -81.7 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:24:23,923 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 03:24:23,925 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.84 ms. Allocated memory is still 137.4 MB. Free memory was 101.4 MB in the beginning and 91.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:24:23,926 INFO L168 Benchmark]: Boogie Preprocessor took 128.20 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 91.9 MB in the beginning and 179.2 MB in the end (delta: -87.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:24:23,926 INFO L168 Benchmark]: RCFGBuilder took 314.31 ms. Allocated memory is still 200.8 MB. Free memory was 179.2 MB in the beginning and 165.9 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-07-20 03:24:23,930 INFO L168 Benchmark]: TraceAbstraction took 3759.66 ms. Allocated memory was 200.8 MB in the beginning and 249.6 MB in the end (delta: 48.8 MB). Free memory was 165.2 MB in the beginning and 183.6 MB in the end (delta: -18.4 MB). Peak memory consumption was 30.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:24:23,938 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 350.84 ms. Allocated memory is still 137.4 MB. Free memory was 101.4 MB in the beginning and 91.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.20 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 91.9 MB in the beginning and 179.2 MB in the end (delta: -87.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 314.31 ms. Allocated memory is still 200.8 MB. Free memory was 179.2 MB in the beginning and 165.9 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3759.66 ms. Allocated memory was 200.8 MB in the beginning and 249.6 MB in the end (delta: 48.8 MB). Free memory was 165.2 MB in the beginning and 183.6 MB in the end (delta: -18.4 MB). Peak memory consumption was 30.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 168 SDtfs, 94 SDslu, 734 SDs, 0 SdLazy, 450 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 214 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 50 PreInvPairs, 59 NumberOfFragments, 55 HoareAnnotationTreeSize, 50 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 267 NumberOfCodeBlocks, 253 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 257 ConstructedInterpolants, 0 QuantifiedInterpolants, 15275 SizeOfPredicates, 10 NumberOfNonLiveVariables, 250 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 35/58 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...