/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 -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 0.1.25-3af5e1f [2020-09-04 13:15:12,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:15:12,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:15:12,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:15:12,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:15:12,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:15:12,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:15:12,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:15:12,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:15:12,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:15:12,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:15:12,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:15:12,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:15:12,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:15:12,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:15:12,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:15:12,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:15:12,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:15:12,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:15:12,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:15:12,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:15:12,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:15:12,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:15:12,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:15:12,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:15:12,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:15:12,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:15:12,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:15:12,802 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:15:12,855 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:15:12,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:15:12,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:15:12,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:15:12,858 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:15:12,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:15:12,859 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:15:12,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:15:12,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:15:12,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:15:12,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:15:12,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:15:12,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:15:12,862 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:15:12,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:15:12,862 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:15:12,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:15:12,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:15:12,863 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:15:12,863 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:15:12,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:15:12,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:15:12,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:15:12,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:15:12,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:15:12,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:15:12,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:15:12,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:15:12,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:15:12,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:15:13,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:15:13,350 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:15:13,353 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:15:13,355 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:15:13,356 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:15:13,357 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-09-04 13:15:13,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4a630a4e/66b5cea460c64a0cb27126f0578a535d/FLAGaaf3e5e28 [2020-09-04 13:15:14,055 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:15:14,056 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-09-04 13:15:14,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4a630a4e/66b5cea460c64a0cb27126f0578a535d/FLAGaaf3e5e28 [2020-09-04 13:15:14,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4a630a4e/66b5cea460c64a0cb27126f0578a535d [2020-09-04 13:15:14,343 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:15:14,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:15:14,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:15:14,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:15:14,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:15:14,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f7f464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14, skipping insertion in model container [2020-09-04 13:15:14,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:15:14,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:15:14,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:15:14,632 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:15:14,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:15:14,666 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:15:14,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14 WrapperNode [2020-09-04 13:15:14,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:15:14,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:15:14,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:15:14,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:15:14,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:15:14,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:15:14,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:15:14,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:15:14,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:15:14,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:15:14,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:15:14,866 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-04 13:15:14,866 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-04 13:15:14,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:15:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:15:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:15:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-04 13:15:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-04 13:15:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:15:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:15:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:15:15,099 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:15:15,100 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:15:15,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:15:15 BoogieIcfgContainer [2020-09-04 13:15:15,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:15:15,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:15:15,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:15:15,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:15:15,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:15:14" (1/3) ... [2020-09-04 13:15:15,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c558968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:15:15, skipping insertion in model container [2020-09-04 13:15:15,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (2/3) ... [2020-09-04 13:15:15,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c558968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:15:15, skipping insertion in model container [2020-09-04 13:15:15,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:15:15" (3/3) ... [2020-09-04 13:15:15,117 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-09-04 13:15:15,126 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:15:15,135 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:15:15,157 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:15:15,191 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:15:15,192 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:15:15,192 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:15:15,192 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:15:15,192 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:15:15,192 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:15:15,192 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:15:15,193 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:15:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-04 13:15:15,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:15:15,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:15:15,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:15:15,222 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:15:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:15:15,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-09-04 13:15:15,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:15:15,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113141251] [2020-09-04 13:15:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:15:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:15,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:15:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:15,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:15:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:15:15,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113141251] [2020-09-04 13:15:15,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:15:15,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:15:15,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615328424] [2020-09-04 13:15:15,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:15:15,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:15:15,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:15:15,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:15:15,513 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-09-04 13:15:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:15:15,812 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-09-04 13:15:15,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:15:15,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:15:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:15:15,829 INFO L225 Difference]: With dead ends: 44 [2020-09-04 13:15:15,829 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 13:15:15,834 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 [2020-09-04 13:15:15,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 13:15:15,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-04 13:15:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:15:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-09-04 13:15:15,898 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-09-04 13:15:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:15:15,899 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-09-04 13:15:15,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:15:15,899 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-09-04 13:15:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 13:15:15,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:15:15,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:15:15,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:15:15,903 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:15:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:15:15,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-09-04 13:15:15,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:15:15,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901984727] [2020-09-04 13:15:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:15:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:15,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:15:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:15,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:15:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:15:15,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901984727] [2020-09-04 13:15:15,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:15:15,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:15:15,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509374143] [2020-09-04 13:15:15,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:15:15,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:15:15,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:15:15,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:15:15,972 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-09-04 13:15:16,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:15:16,045 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-09-04 13:15:16,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:15:16,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-04 13:15:16,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:15:16,048 INFO L225 Difference]: With dead ends: 36 [2020-09-04 13:15:16,048 INFO L226 Difference]: Without dead ends: 32 [2020-09-04 13:15:16,049 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 [2020-09-04 13:15:16,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-04 13:15:16,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-09-04 13:15:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:15:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-09-04 13:15:16,060 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-09-04 13:15:16,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:15:16,060 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-09-04 13:15:16,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:15:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-09-04 13:15:16,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 13:15:16,062 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:15:16,063 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] [2020-09-04 13:15:16,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:15:16,063 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:15:16,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:15:16,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-09-04 13:15:16,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:15:16,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574939545] [2020-09-04 13:15:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:15:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:16,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:15:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:16,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:15:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:16,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:16,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:15:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:15:16,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574939545] [2020-09-04 13:15:16,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620003827] [2020-09-04 13:15:16,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:15:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:16,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:15:16,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:15:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:15:16,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:15:16,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-09-04 13:15:16,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246057799] [2020-09-04 13:15:16,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:15:16,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:15:16,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:15:16,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:15:16,445 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-09-04 13:15:16,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:15:16,680 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-09-04 13:15:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:15:16,681 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-09-04 13:15:16,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:15:16,683 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:15:16,683 INFO L226 Difference]: Without dead ends: 34 [2020-09-04 13:15:16,684 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 [2020-09-04 13:15:16,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-04 13:15:16,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-04 13:15:16,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 13:15:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-09-04 13:15:16,694 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-09-04 13:15:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:15:16,694 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-09-04 13:15:16,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:15:16,695 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-09-04 13:15:16,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 13:15:16,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:15:16,697 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] [2020-09-04 13:15:16,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:15:16,912 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:15:16,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:15:16,913 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-09-04 13:15:16,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:15:16,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68798399] [2020-09-04 13:15:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:15:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:17,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:15:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:17,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:15:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:17,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:17,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:15:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:15:17,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68798399] [2020-09-04 13:15:17,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008907413] [2020-09-04 13:15:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-09-04 13:15:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:17,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:15:17,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:15:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:15:17,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:15:17,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-04 13:15:17,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695638838] [2020-09-04 13:15:17,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:15:17,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:15:17,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:15:17,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:15:17,253 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2020-09-04 13:15:17,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:15:17,316 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-09-04 13:15:17,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:15:17,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-09-04 13:15:17,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:15:17,319 INFO L225 Difference]: With dead ends: 46 [2020-09-04 13:15:17,320 INFO L226 Difference]: Without dead ends: 42 [2020-09-04 13:15:17,320 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 [2020-09-04 13:15:17,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-04 13:15:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-09-04 13:15:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 13:15:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-09-04 13:15:17,331 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2020-09-04 13:15:17,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:15:17,331 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-09-04 13:15:17,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:15:17,331 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-09-04 13:15:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 13:15:17,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:15:17,333 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] [2020-09-04 13:15:17,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:15:17,547 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:15:17,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:15:17,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1725129826, now seen corresponding path program 1 times [2020-09-04 13:15:17,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:15:17,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274473501] [2020-09-04 13:15:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:15:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:17,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:15:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:17,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:15:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:17,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:17,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:15:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:15:17,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274473501] [2020-09-04 13:15:17,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028066922] [2020-09-04 13:15:17,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:15:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:17,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:15:17,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:15:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:15:17,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:15:17,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2020-09-04 13:15:17,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872833425] [2020-09-04 13:15:17,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:15:17,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:15:17,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:15:17,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:15:17,743 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 7 states. [2020-09-04 13:15:17,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:15:17,860 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2020-09-04 13:15:17,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:15:17,861 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-04 13:15:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:15:17,863 INFO L225 Difference]: With dead ends: 44 [2020-09-04 13:15:17,863 INFO L226 Difference]: Without dead ends: 40 [2020-09-04 13:15:17,864 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 [2020-09-04 13:15:17,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-04 13:15:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-09-04 13:15:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 13:15:17,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-09-04 13:15:17,873 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2020-09-04 13:15:17,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:15:17,873 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-09-04 13:15:17,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:15:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-09-04 13:15:17,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-04 13:15:17,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:15:17,876 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] [2020-09-04 13:15:18,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:15:18,092 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:15:18,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:15:18,093 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-09-04 13:15:18,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:15:18,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171963905] [2020-09-04 13:15:18,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:15:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:18,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:15:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:18,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:15:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:18,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:18,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:18,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:15:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:18,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-04 13:15:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-04 13:15:18,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171963905] [2020-09-04 13:15:18,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755735356] [2020-09-04 13:15:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:15:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:18,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-04 13:15:18,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:15:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 13:15:18,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:15:18,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2020-09-04 13:15:18,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601781826] [2020-09-04 13:15:18,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 13:15:18,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:15:18,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 13:15:18,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:15:18,440 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 12 states. [2020-09-04 13:15:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:15:18,623 INFO L93 Difference]: Finished difference Result 69 states and 101 transitions. [2020-09-04 13:15:18,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:15:18,624 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-09-04 13:15:18,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:15:18,625 INFO L225 Difference]: With dead ends: 69 [2020-09-04 13:15:18,625 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:15:18,626 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 [2020-09-04 13:15:18,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:15:18,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:15:18,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:15:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:15:18,628 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2020-09-04 13:15:18,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:15:18,628 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:15:18,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 13:15:18,628 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:15:18,628 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:15:18,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:15:18,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:15:19,027 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:15:19,027 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:15:19,027 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:15:19,027 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:15:19,028 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:15:19,028 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:15:19,029 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-09-04 13:15:19,029 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-09-04 13:15:19,029 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-09-04 13:15:19,029 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-09-04 13:15:19,029 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-09-04 13:15:19,029 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-09-04 13:15:19,030 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 2 main_~x~0) (<= main_~x~0 2)) [2020-09-04 13:15:19,030 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-09-04 13:15:19,030 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-09-04 13:15:19,030 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-09-04 13:15:19,031 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-09-04 13:15:19,031 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-09-04 13:15:19,032 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-09-04 13:15:19,032 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-09-04 13:15:19,032 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-09-04 13:15:19,032 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-09-04 13:15:19,032 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-09-04 13:15:19,032 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-09-04 13:15:19,033 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-09-04 13:15:19,033 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-09-04 13:15:19,033 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-09-04 13:15:19,034 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (and (<= |fibo1_#t~ret0| 1) (< 1 fibo1_~n) (<= 1 |fibo1_#t~ret0|) .cse0))) [2020-09-04 13:15:19,035 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-09-04 13:15:19,035 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-09-04 13:15:19,035 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-09-04 13:15:19,035 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-09-04 13:15:19,035 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-09-04 13:15:19,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:15:19 BoogieIcfgContainer [2020-09-04 13:15:19,045 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:15:19,050 INFO L168 Benchmark]: Toolchain (without parser) took 4702.43 ms. Allocated memory was 141.0 MB in the beginning and 243.3 MB in the end (delta: 102.2 MB). Free memory was 103.1 MB in the beginning and 161.8 MB in the end (delta: -58.7 MB). Peak memory consumption was 43.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:15:19,056 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:15:19,057 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.77 ms. Allocated memory is still 141.0 MB. Free memory was 102.9 MB in the beginning and 93.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:15:19,058 INFO L168 Benchmark]: Boogie Preprocessor took 121.28 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.2 MB in the beginning and 183.6 MB in the end (delta: -90.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-04 13:15:19,059 INFO L168 Benchmark]: RCFGBuilder took 315.93 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 170.3 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:15:19,060 INFO L168 Benchmark]: TraceAbstraction took 3938.40 ms. Allocated memory was 204.5 MB in the beginning and 243.3 MB in the end (delta: 38.8 MB). Free memory was 169.7 MB in the beginning and 161.8 MB in the end (delta: 7.9 MB). Peak memory consumption was 46.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:15:19,072 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 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.77 ms. Allocated memory is still 141.0 MB. Free memory was 102.9 MB in the beginning and 93.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.28 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.2 MB in the beginning and 183.6 MB in the end (delta: -90.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.93 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 170.3 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3938.40 ms. Allocated memory was 204.5 MB in the beginning and 243.3 MB in the end (delta: 38.8 MB). Free memory was 169.7 MB in the beginning and 161.8 MB in the end (delta: 7.9 MB). Peak memory consumption was 46.7 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: 3.6s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 168 SDtfs, 95 SDslu, 734 SDs, 0 SdLazy, 450 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s 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, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 267 NumberOfCodeBlocks, 267 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 257 ConstructedInterpolants, 0 QuantifiedInterpolants, 15275 SizeOfPredicates, 10 NumberOfNonLiveVariables, 271 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...